Merge branch 'dgud/wx/decrease-opengl-docs' into maint

* dgud/wx/decrease-opengl-docs:
  reltool: Remove export_all warning in tests
  et: Remove export_all warnings in test
  mnesia: Remove export_all in tests
  wx: Remove export_all in example code
  wx: test remove export_all
  wx: Update doc, OpenGL external links
  wx: Reduce Opengl docs

2 files changed, 487 insertions, 9373 deletions

diff --git a/lib/wx/src/gen/gl.erl b/lib/wx/src/gen/gl.erl
index 4a178ea1e4..47afb25c5d 100644
--- a/lib/wx/src/gen/gl.erl
+++ b/lib/wx/src/gen/gl.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@
 %% This file is generated DO NOT EDIT
 
 %% @doc  Standard OpenGL api.
-%% See <a href="http://www.opengl.org/sdk/docs/man/">www.opengl.org</a>
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">www.khronos.org</a>
 %%
 %% Booleans are represented by integers 0 and 1.
 
@@ -324,7 +324,7 @@ send_bin(Tuple) when is_tuple(Tuple) ->
 %% value is then masked with   2 m-1, where   m is the number of bits in a color index stored
 %% in the frame buffer. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearIndex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glClearIndex.xml">external</a> documentation.
 -spec clearIndex(C) -> 'ok' when C :: float().
 clearIndex(C) ->
   cast(5037, <<C:?GLfloat>>).
@@ -335,7 +335,7 @@ clearIndex(C) ->
 %%  to clear the color buffers. Values specified by ``gl:clearColor'' are clamped to the
 %% range  [0 1]. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearColor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClearColor.xhtml">external</a> documentation.
 -spec clearColor(Red, Green, Blue, Alpha) -> 'ok' when Red :: clamp(),Green :: clamp(),Blue :: clamp(),Alpha :: clamp().
 clearColor(Red,Green,Blue,Alpha) ->
   cast(5038, <<Red:?GLclampf,Green:?GLclampf,Blue:?GLclampf,Alpha:?GLclampf>>).
@@ -346,26 +346,7 @@ clearColor(Red,Green,Blue,Alpha) ->
 %% , ``gl:clearDepth'', and ``gl:clearStencil''. Multiple color buffers can be cleared
 %% simultaneously by selecting more than one buffer at a time using  {@link gl:drawBuffer/1} . 
 %%
-%%  The pixel ownership test, the scissor test, dithering, and the buffer writemasks affect
-%% the operation of ``gl:clear''. The scissor box bounds the cleared region. Alpha function,
-%% blend function, logical operation, stenciling, texture mapping, and depth-buffering are
-%% ignored by ``gl:clear''. 
-%%
-%% ``gl:clear'' takes a single argument that is the bitwise OR of several values indicating
-%% which buffer is to be cleared. 
-%%
-%%  The values are as follows: 
-%%
-%% `?GL_COLOR_BUFFER_BIT':  Indicates the buffers currently enabled for color writing. 
-%%
-%% `?GL_DEPTH_BUFFER_BIT':  Indicates the depth buffer. 
-%%
-%% `?GL_STENCIL_BUFFER_BIT':  Indicates the stencil buffer. 
-%%
-%%  The value to which each buffer is cleared depends on the setting of the clear value for
-%% that buffer. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClear.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClear.xhtml">external</a> documentation.
 -spec clear(Mask) -> 'ok' when Mask :: integer().
 clear(Mask) ->
   cast(5039, <<Mask:?GLbitfield>>).
@@ -378,11 +359,7 @@ clear(Mask) ->
 %% to the corresponding bit in the color index buffer (or buffers). Where a 0 (zero) appears,
 %% the corresponding bit is write-protected. 
 %%
-%%  This mask is used only in color index mode, and it affects only the buffers currently
-%% selected for writing (see  {@link gl:drawBuffer/1} ). Initially, all bits are enabled for
-%% writing. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIndexMask.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glIndexMask.xml">external</a> documentation.
 -spec indexMask(Mask) -> 'ok' when Mask :: integer().
 indexMask(Mask) ->
   cast(5040, <<Mask:?GLuint>>).
@@ -395,10 +372,7 @@ indexMask(Mask) ->
 %%  is `?GL_FALSE', for example, no change is made to the red component of any pixel
 %% in any of the color buffers, regardless of the drawing operation attempted. 
 %%
-%%  Changes to individual bits of components cannot be controlled. Rather, changes are either
-%% enabled or disabled for entire color components. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorMask.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glColorMask.xhtml">external</a> documentation.
 -spec colorMask(Red, Green, Blue, Alpha) -> 'ok' when Red :: 0|1,Green :: 0|1,Blue :: 0|1,Alpha :: 0|1.
 colorMask(Red,Green,Blue,Alpha) ->
   cast(5041, <<Red:?GLboolean,Green:?GLboolean,Blue:?GLboolean,Alpha:?GLboolean>>).
@@ -411,37 +385,7 @@ colorMask(Red,Green,Blue,Alpha) ->
 %% testing is enabled. By default, it is not enabled. (See  {@link gl:enable/1}  and  {@link gl:enable/1} 
 %%  of `?GL_ALPHA_TEST'.) 
 %%
-%%  `Func'  and  `Ref'  specify the conditions under which the pixel is drawn. The
-%% incoming alpha value is compared to  `Ref'  using the function specified by  `Func' .
-%% If the value passes the comparison, the incoming fragment is drawn if it also passes subsequent
-%% stencil and depth buffer tests. If the value fails the comparison, no change is made to
-%% the frame buffer at that pixel location. The comparison functions are as follows: 
-%%
-%% `?GL_NEVER':  Never passes. 
-%%
-%% `?GL_LESS':  Passes if the incoming alpha value is less than the reference value. 
-%%
-%% `?GL_EQUAL':  Passes if the incoming alpha value is equal to the reference value. 
-%%
-%% `?GL_LEQUAL':  Passes if the incoming alpha value is less than or equal to the reference
-%% value. 
-%%
-%% `?GL_GREATER':  Passes if the incoming alpha value is greater than the reference
-%% value. 
-%%
-%% `?GL_NOTEQUAL':  Passes if the incoming alpha value is not equal to the reference
-%% value. 
-%%
-%% `?GL_GEQUAL':  Passes if the incoming alpha value is greater than or equal to the
-%% reference value. 
-%%
-%% `?GL_ALWAYS':  Always passes (initial value). 
-%%
-%% ``gl:alphaFunc'' operates on all pixel write operations, including those resulting from
-%% the scan conversion of points, lines, polygons, and bitmaps, and from pixel draw and copy
-%% operations. ``gl:alphaFunc'' does not affect screen clear operations. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glAlphaFunc.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glAlphaFunc.xml">external</a> documentation.
 -spec alphaFunc(Func, Ref) -> 'ok' when Func :: enum(),Ref :: clamp().
 alphaFunc(Func,Ref) ->
   cast(5042, <<Func:?GLenum,Ref:?GLclampf>>).
@@ -453,70 +397,7 @@ alphaFunc(Func,Ref) ->
 %% is initially disabled. Use  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_BLEND'
 %%  to enable and disable blending. 
 %%
-%% ``gl:blendFunc'' defines the operation of blending for all draw buffers when it is enabled.
-%% ``gl:blendFunci'' defines the operation of blending for a single draw buffer specified
-%% by  `Buf'  when enabled for that draw buffer.  `Sfactor'  specifies which method
-%% is used to scale the source color components.  `Dfactor'  specifies which method is
-%% used to scale the destination color components. Both parameters must be one of the following
-%% symbolic constants: `?GL_ZERO', `?GL_ONE', `?GL_SRC_COLOR', `?GL_ONE_MINUS_SRC_COLOR'
-%% , `?GL_DST_COLOR', `?GL_ONE_MINUS_DST_COLOR', `?GL_SRC_ALPHA', `?GL_ONE_MINUS_SRC_ALPHA'
-%% , `?GL_DST_ALPHA', `?GL_ONE_MINUS_DST_ALPHA', `?GL_CONSTANT_COLOR', `?GL_ONE_MINUS_CONSTANT_COLOR'
-%% , `?GL_CONSTANT_ALPHA', `?GL_ONE_MINUS_CONSTANT_ALPHA', `?GL_SRC_ALPHA_SATURATE'
-%% , `?GL_SRC1_COLOR', `?GL_ONE_MINUS_SRC1_COLOR', `?GL_SRC1_ALPHA', and `?GL_ONE_MINUS_SRC1_ALPHA'
-%% . The possible methods are described in the following table. Each method defines four
-%% scale factors, one each for red, green, blue, and alpha. In the table and in subsequent
-%% equations, first source, second source and destination color components are referred to
-%% as (R s0 G s0 B s0 A s0), (R s1 G s1 B s1 A s1) and (R d G d B d A d), respectively. The color specified by  {@link gl:blendColor/4}  is referred to
-%% as (R c G c B c A c). They are understood to have integer values between 0 and (k R k G k B k A), where 
-%%
-%%  k c=2(m c)-1
-%%
-%%  and (m R m G m B m A) is the number of red, green, blue, and alpha bitplanes. 
-%%
-%%  Source and destination scale factors are referred to as (s R s G s B s A) and (d R d G d B d A). The scale factors described
-%% in the table, denoted  (f R f G f B f A), represent either source or destination factors. All scale factors
-%% have range  [0 1]. 
-%%
-%% <table><tbody><tr><td>` Parameter '</td><td>(f R f G f B f A)</td></tr></tbody><tbody><tr><td>`?GL_ZERO'
-%% </td><td>(0 0 0 0)</td></tr><tr><td>`?GL_ONE'</td><td>(1 1 1 1)</td></tr><tr><td>`?GL_SRC_COLOR'</td>
-%% <td>(R s0 k/R G s0 k/G B s0 k/B A s0 k/A)</td></tr><tr><td>`?GL_ONE_MINUS_SRC_COLOR'</td><td>(1 1 1 1)-(R s0 k/R G s0 k/G B s0 k/B
-%% A s0 k/A)</td></tr><tr><td>`?GL_DST_COLOR'
-%% </td><td>(R d k/R G d k/G B d k/B A d k/A)</td></tr><tr><td>`?GL_ONE_MINUS_DST_COLOR'</td><td>(1 1 1 1)-(R d k/R G d k/G B d k/B
-%%  A d k/A)</td></tr><tr><td>`?GL_SRC_ALPHA'
-%% </td><td>(A s0 k/A A s0 k/A A s0 k/A A s0 k/A)</td></tr><tr><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td>(1 1 1 1)-(A s0 k/A A s0 k/A A s0
-%% k/A A s0 k/A)</td></tr><tr><td>`?GL_DST_ALPHA'
-%% </td><td>(A d k/A A d k/A A d k/A A d k/A)</td></tr><tr><td>`?GL_ONE_MINUS_DST_ALPHA'</td><td>(1 1 1 1)-(A d k/A A d k/A A d k/A
-%%  A d k/A)</td></tr><tr><td>`?GL_CONSTANT_COLOR'
-%% </td><td>(R c G c B c A c)</td></tr><tr><td>`?GL_ONE_MINUS_CONSTANT_COLOR'</td><td>(1 1 1 1)-(R c G c B c A c)</td></tr><tr><td>
-%% `?GL_CONSTANT_ALPHA'</td><td>(A c A c A c A c)</td></tr><tr><td>`?GL_ONE_MINUS_CONSTANT_ALPHA'</td>
-%% <td>(1 1 1 1)-(A c A c A c A c)</td></tr><tr><td>`?GL_SRC_ALPHA_SATURATE'</td><td>(i i i 1)</td></tr><tr><td>`?GL_SRC1_COLOR'
-%% </td><td>(R s1 k/R G s1 k/G B s1 k/B A s1 k/A)</td></tr><tr><td>`?GL_ONE_MINUS_SRC1_COLOR'</td><td>(1 1 1 1)-(R s1 k/R G s1 k/G B
-%% s1 k/B A s1 k/A)</td></tr><tr><td>`?GL_SRC1_ALPHA'
-%% </td><td>(A s1 k/A A s1 k/A A s1 k/A A s1 k/A)</td></tr><tr><td>`?GL_ONE_MINUS_SRC1_ALPHA'</td><td>(1 1 1 1)-(A s1 k/A A s1 k/A A
-%% s1 k/A A s1 k/A)</td></tr></tbody></table>
-%% 
-%%
-%%  In the table, 
-%%
-%%  i=min(A s k A-A d) k/A
-%%
-%%  To determine the blended RGBA values of a pixel, the system uses the following equations:
-%% 
-%%
-%%  R d=min(k R R s  s R+R d  d R) G d=min(k G G s  s G+G d  d G) B d=min(k B B s  s B+B d  d B) A d=min(k A A s  s A+A d  d A)
-%%
-%%  Despite the apparent precision of the above equations, blending arithmetic is not exactly
-%% specified, because blending operates with imprecise integer color values. However, a blend
-%% factor that should be equal to 1 is guaranteed not to modify its multiplicand, and a blend
-%% factor equal to 0 reduces its multiplicand to 0. For example, when  `Sfactor'  is `?GL_SRC_ALPHA'
-%% ,  `Dfactor'  is `?GL_ONE_MINUS_SRC_ALPHA', and   A s is equal to   k A, the equations
-%% reduce to simple replacement: 
-%%
-%%  R d=R s G d=G s B d=B s A d=A s
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlendFunc.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBlendFunc.xhtml">external</a> documentation.
 -spec blendFunc(Sfactor, Dfactor) -> 'ok' when Sfactor :: enum(),Dfactor :: enum().
 blendFunc(Sfactor,Dfactor) ->
   cast(5043, <<Sfactor:?GLenum,Dfactor:?GLenum>>).
@@ -528,25 +409,7 @@ blendFunc(Sfactor,Dfactor) ->
 %% buffer. To enable or disable the logical operation, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
 %%  using the symbolic constant `?GL_COLOR_LOGIC_OP'. The initial value is disabled. 
 %%
-%% <table><tbody><tr><td>` Opcode '</td><td>` Resulting Operation '</td></tr></tbody>
-%% <tbody><tr><td>`?GL_CLEAR'</td><td> 0 </td></tr><tr><td>`?GL_SET'</td><td> 1 </td>
-%% </tr><tr><td>`?GL_COPY'</td><td> s </td></tr><tr><td>`?GL_COPY_INVERTED'</td><td>
-%%  ~s </td></tr><tr><td>`?GL_NOOP'</td><td> d </td></tr><tr><td>`?GL_INVERT'</td><td>
-%%  ~d </td></tr><tr><td>`?GL_AND'</td><td> s &amp; d </td></tr><tr><td>`?GL_NAND'</td>
-%% <td> ~(s &amp; d) </td></tr><tr><td>`?GL_OR'</td><td> s | d </td></tr><tr><td>`?GL_NOR'
-%% </td><td> ~(s | d) </td></tr><tr><td>`?GL_XOR'</td><td> s ^ d </td></tr><tr><td>`?GL_EQUIV'
-%% </td><td> ~(s ^ d) </td></tr><tr><td>`?GL_AND_REVERSE'</td><td> s &amp; ~d </td></tr>
-%% <tr><td>`?GL_AND_INVERTED'</td><td> ~s &amp; d </td></tr><tr><td>`?GL_OR_REVERSE'
-%% </td><td> s | ~d </td></tr><tr><td>`?GL_OR_INVERTED'</td><td> ~s | d </td></tr></tbody>
-%% </table>
-%%
-%%  `Opcode'  is a symbolic constant chosen from the list above. In the explanation of
-%% the logical operations, `s' represents the incoming color and `d' represents
-%% the color in the frame buffer. Standard C-language operators are used. As these bitwise
-%% operators suggest, the logical operation is applied independently to each bit pair of
-%% the source and destination colors. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLogicOp.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glLogicOp.xhtml">external</a> documentation.
 -spec logicOp(Opcode) -> 'ok' when Opcode :: enum().
 logicOp(Opcode) ->
   cast(5044, <<Opcode:?GLenum>>).
@@ -559,10 +422,7 @@ logicOp(Opcode) ->
 %% commands with the argument `?GL_CULL_FACE'. Facets include triangles, quadrilaterals,
 %% polygons, and rectangles. 
 %%
-%%  {@link gl:frontFace/1}  specifies which of the clockwise and counterclockwise facets are
-%% front-facing and back-facing. See  {@link gl:frontFace/1} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCullFace.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCullFace.xhtml">external</a> documentation.
 -spec cullFace(Mode) -> 'ok' when Mode :: enum().
 cullFace(Mode) ->
   cast(5045, <<Mode:?GLenum>>).
@@ -574,18 +434,7 @@ cullFace(Mode) ->
 %% rendering of the image. To enable and disable elimination of back-facing polygons, call  {@link gl:enable/1} 
 %%  and  {@link gl:enable/1}  with argument `?GL_CULL_FACE'. 
 %%
-%%  The projection of a polygon to window coordinates is said to have clockwise winding if
-%% an imaginary object following the path from its first vertex, its second vertex, and so
-%% on, to its last vertex, and finally back to its first vertex, moves in a clockwise direction
-%% about the interior of the polygon. The polygon's winding is said to be counterclockwise
-%% if the imaginary object following the same path moves in a counterclockwise direction
-%% about the interior of the polygon. ``gl:frontFace'' specifies whether polygons with
-%% clockwise winding in window coordinates, or counterclockwise winding in window coordinates,
-%% are taken to be front-facing. Passing `?GL_CCW' to  `Mode'  selects counterclockwise
-%% polygons as front-facing; `?GL_CW' selects clockwise polygons as front-facing. By
-%% default, counterclockwise polygons are taken to be front-facing. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFrontFace.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFrontFace.xhtml">external</a> documentation.
 -spec frontFace(Mode) -> 'ok' when Mode :: enum().
 frontFace(Mode) ->
   cast(5046, <<Mode:?GLenum>>).
@@ -597,7 +446,7 @@ frontFace(Mode) ->
 %% will be used to rasterize points. Otherwise, the value written to the shading language
 %% built-in variable gl_PointSize will be used. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPointSize.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPointSize.xhtml">external</a> documentation.
 -spec pointSize(Size) -> 'ok' when Size :: float().
 pointSize(Size) ->
   cast(5047, <<Size:?GLfloat>>).
@@ -609,27 +458,7 @@ pointSize(Size) ->
 %% is enabled. To enable and disable line antialiasing, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
 %%  with argument `?GL_LINE_SMOOTH'. Line antialiasing is initially disabled. 
 %%
-%%  If line antialiasing is disabled, the actual width is determined by rounding the supplied
-%% width to the nearest integer. (If the rounding results in the value 0, it is as if the
-%% line width were 1.) If |&amp;Delta; x|&gt;=|&amp;Delta; y|, `i' pixels are filled in each column that is rasterized,
-%% where `i' is the rounded value of  `Width' . Otherwise, `i' pixels are filled
-%% in each row that is rasterized. 
-%%
-%%  If antialiasing is enabled, line rasterization produces a fragment for each pixel square
-%% that intersects the region lying within the rectangle having width equal to the current
-%% line width, length equal to the actual length of the line, and centered on the mathematical
-%% line segment. The coverage value for each fragment is the window coordinate area of the
-%% intersection of the rectangular region with the corresponding pixel square. This value
-%% is saved and used in the final rasterization step. 
-%%
-%%  Not all widths can be supported when line antialiasing is enabled. If an unsupported
-%% width is requested, the nearest supported width is used. Only width 1 is guaranteed to
-%% be supported; others depend on the implementation. Likewise, there is a range for aliased
-%% line widths as well. To query the range of supported widths and the size difference between
-%% supported widths within the range, call  {@link gl:getBooleanv/1}  with arguments `?GL_ALIASED_LINE_WIDTH_RANGE'
-%% , `?GL_SMOOTH_LINE_WIDTH_RANGE', and `?GL_SMOOTH_LINE_WIDTH_GRANULARITY'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLineWidth.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glLineWidth.xhtml">external</a> documentation.
 -spec lineWidth(Width) -> 'ok' when Width :: float().
 lineWidth(Width) ->
   cast(5048, <<Width:?GLfloat>>).
@@ -641,27 +470,7 @@ lineWidth(Width) ->
 %% stipple pattern  `Pattern' , the repeat count  `Factor' , and an integer stipple
 %% counter   s. 
 %%
-%%  Counter   s is reset to 0 whenever  {@link gl:'begin'/1}  is called and before each line segment
-%% of a  {@link gl:'begin'/1} (`?GL_LINES')/ {@link gl:'begin'/1}  sequence is generated. It is
-%% incremented after each fragment of a unit width aliased line segment is generated or after
-%% each   i fragments of an   i width line segment are generated. The   i fragments associated
-%% with count   s are masked out if 
-%%
-%%  `Pattern'  bit  (s/factor)% 16
-%%
-%%  is 0, otherwise these fragments are sent to the frame buffer. Bit zero of  `Pattern' 
-%% is the least significant bit. 
-%%
-%%  Antialiased lines are treated as a sequence of   1×width rectangles for purposes of stippling.
-%% Whether rectangle   s is rasterized or not depends on the fragment rule described for
-%% aliased lines, counting rectangles rather than groups of fragments. 
-%%
-%%  To enable and disable line stippling, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
-%% with argument `?GL_LINE_STIPPLE'. When enabled, the line stipple pattern is applied
-%% as described above. When disabled, it is as if the pattern were all 1's. Initially, line
-%% stippling is disabled. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLineStipple.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLineStipple.xml">external</a> documentation.
 -spec lineStipple(Factor, Pattern) -> 'ok' when Factor :: integer(),Pattern :: integer().
 lineStipple(Factor,Pattern) ->
   cast(5049, <<Factor:?GLint,Pattern:?GLushort>>).
@@ -674,22 +483,7 @@ lineStipple(Factor,Pattern) ->
 %% polygon's vertices are lit and the polygon is clipped and possibly culled before these
 %% modes are applied. 
 %%
-%%  Three modes are defined and can be specified in  `Mode' : 
-%%
-%% `?GL_POINT':  Polygon vertices that are marked as the start of a boundary edge are
-%% drawn as points. Point attributes such as `?GL_POINT_SIZE' and `?GL_POINT_SMOOTH'
-%%  control the rasterization of the points. Polygon rasterization attributes other than `?GL_POLYGON_MODE'
-%%  have no effect. 
-%%
-%% `?GL_LINE':  Boundary edges of the polygon are drawn as line segments. Line attributes
-%% such as `?GL_LINE_WIDTH' and `?GL_LINE_SMOOTH' control the rasterization of
-%% the lines. Polygon rasterization attributes other than `?GL_POLYGON_MODE' have no
-%% effect. 
-%%
-%% `?GL_FILL':  The interior of the polygon is filled. Polygon attributes such as `?GL_POLYGON_SMOOTH'
-%%  control the rasterization of the polygon. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPolygonMode.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPolygonMode.xhtml">external</a> documentation.
 -spec polygonMode(Face, Mode) -> 'ok' when Face :: enum(),Mode :: enum().
 polygonMode(Face,Mode) ->
   cast(5050, <<Face:?GLenum,Mode:?GLenum>>).
@@ -704,10 +498,7 @@ polygonMode(Face,Mode) ->
 %% a resolvable offset for a given implementation. The offset is added before the depth test
 %% is performed and before the value is written into the depth buffer. 
 %%
-%% ``gl:polygonOffset'' is useful for rendering hidden-line images, for applying decals
-%% to surfaces, and for rendering solids with highlighted edges. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPolygonOffset.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPolygonOffset.xhtml">external</a> documentation.
 -spec polygonOffset(Factor, Units) -> 'ok' when Factor :: float(),Units :: float().
 polygonOffset(Factor,Units) ->
   cast(5051, <<Factor:?GLfloat,Units:?GLfloat>>).
@@ -718,27 +509,7 @@ polygonOffset(Factor,Units) ->
 %% fragments produced by rasterization, creating a pattern. Stippling is independent of polygon
 %% antialiasing. 
 %%
-%%  `Pattern'  is a pointer to a   32×32 stipple pattern that is stored in memory just
-%% like the pixel data supplied to a  {@link gl:drawPixels/5}  call with  height and `width'
-%%  both equal to 32, a pixel format of `?GL_COLOR_INDEX', and data type of `?GL_BITMAP'
-%% . That is, the stipple pattern is represented as a   32×32 array of 1-bit color indices
-%% packed in unsigned bytes.  {@link gl:pixelStoref/2}  parameters like `?GL_UNPACK_SWAP_BYTES'
-%%  and `?GL_UNPACK_LSB_FIRST' affect the assembling of the bits into a stipple pattern.
-%% Pixel transfer operations (shift, offset, pixel map) are not applied to the stipple image,
-%% however. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a stipple pattern is specified,  `Pattern'  is
-%% treated as a byte offset into the buffer object's data store. 
-%%
-%%  To enable and disable polygon stippling, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
-%% with argument `?GL_POLYGON_STIPPLE'. Polygon stippling is initially disabled. If
-%% it's enabled, a rasterized polygon fragment with window coordinates   x w and   y w is
-%% sent to the next stage of the GL if and only if the ( x w% 32)th bit in the  ( y w% 32)th
-%% row of the stipple pattern is 1 (one). When polygon stippling is disabled, it is as if
-%% the stipple pattern consists of all 1's. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPolygonStipple.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPolygonStipple.xml">external</a> documentation.
 -spec polygonStipple(Mask) -> 'ok' when Mask :: binary().
 polygonStipple(Mask) ->
   send_bin(Mask),
@@ -753,11 +524,7 @@ polygonStipple(Mask) ->
 %% Unlike  {@link gl:readPixels/7} , however, pixel transfer operations (shift, offset, pixel
 %% map) are not applied to the returned stipple image. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a polygon stipple pattern is requested,  `Pattern' 
-%% is treated as a byte offset into the buffer object's data store. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetPolygonStipple.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetPolygonStipple.xml">external</a> documentation.
 -spec getPolygonStipple() -> binary().
 getPolygonStipple() ->
   call(5053, <<>>).
@@ -771,13 +538,7 @@ getPolygonStipple() ->
 %% of a nonboundary edge. ``gl:edgeFlag'' sets the edge flag bit to `?GL_TRUE' if  `Flag' 
 %%  is `?GL_TRUE' and to `?GL_FALSE' otherwise. 
 %%
-%%  The vertices of connected triangles and connected quadrilaterals are always marked as
-%% boundary, regardless of the value of the edge flag. 
-%%
-%%  Boundary and nonboundary edge flags on vertices are significant only if `?GL_POLYGON_MODE'
-%%  is set to `?GL_POINT' or `?GL_LINE'. See  {@link gl:polygonMode/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEdgeFlag.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glEdgeFlag.xml">external</a> documentation.
 -spec edgeFlag(Flag) -> 'ok' when Flag :: 0|1.
 edgeFlag(Flag) ->
   cast(5054, <<Flag:?GLboolean>>).
@@ -792,17 +553,7 @@ edgeFlagv({Flag}) ->  edgeFlag(Flag).
 %% first two arguments,  `X'  and  `Y' , specify the lower left corner of the box.  `Width' 
 %%  and  `Height'  specify the width and height of the box. 
 %%
-%%  To enable and disable the scissor test, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
-%% with argument `?GL_SCISSOR_TEST'. The test is initially disabled. While the test
-%% is enabled, only pixels that lie within the scissor box can be modified by drawing commands.
-%% Window coordinates have integer values at the shared corners of frame buffer pixels. glScissor(0,0,1,1)
-%%  allows modification of only the lower left pixel in the window, and glScissor(0,0,0,0)
-%% doesn't allow modification of any pixels in the window. 
-%%
-%%  When the scissor test is disabled, it is as though the scissor box includes the entire
-%% window. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glScissor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glScissor.xhtml">external</a> documentation.
 -spec scissor(X, Y, Width, Height) -> 'ok' when X :: integer(),Y :: integer(),Width :: integer(),Height :: integer().
 scissor(X,Y,Width,Height) ->
   cast(5055, <<X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei>>).
@@ -817,20 +568,7 @@ scissor(X,Y,Width,Height) ->
 %% clipping planes. Because the resulting clipping region is the intersection of the defined
 %% half-spaces, it is always convex. 
 %%
-%% ``gl:clipPlane'' specifies a half-space using a four-component plane equation. When ``gl:clipPlane''
-%%  is called,  `Equation'  is transformed by the inverse of the modelview matrix and
-%% stored in the resulting eye coordinates. Subsequent changes to the modelview matrix have
-%% no effect on the stored plane-equation components. If the dot product of the eye coordinates
-%% of a vertex with the stored plane equation components is positive or zero, the vertex is `in'
-%%  with respect to that clipping plane. Otherwise, it is `out'. 
-%%
-%%  To enable and disable clipping planes, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
-%% with the argument `?GL_CLIP_PLANE'`i', where `i' is the plane number. 
-%%
-%%  All clipping planes are initially defined as (0, 0, 0, 0) in eye coordinates and are
-%% disabled. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClipPlane.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glClipPlane.xml">external</a> documentation.
 -spec clipPlane(Plane, Equation) -> 'ok' when Plane :: enum(),Equation :: {float(),float(),float(),float()}.
 clipPlane(Plane,{E1,E2,E3,E4}) ->
   cast(5056, <<Plane:?GLenum,0:32,E1:?GLdouble,E2:?GLdouble,E3:?GLdouble,E4:?GLdouble>>).
@@ -840,7 +578,7 @@ clipPlane(Plane,{E1,E2,E3,E4}) ->
 %% ``gl:getClipPlane'' returns in  `Equation'  the four coefficients of the plane equation
 %% for  `Plane' . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetClipPlane.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetClipPlane.xml">external</a> documentation.
 -spec getClipPlane(Plane) -> {float(),float(),float(),float()} when Plane :: enum().
 getClipPlane(Plane) ->
   call(5057, <<Plane:?GLenum>>).
@@ -850,44 +588,7 @@ getClipPlane(Plane) ->
 %%  When colors are written to the frame buffer, they are written into the color buffers
 %% specified by ``gl:drawBuffer''. The specifications are as follows: 
 %%
-%% `?GL_NONE':  No color buffers are written. 
-%%
-%% `?GL_FRONT_LEFT':  Only the front left color buffer is written. 
-%%
-%% `?GL_FRONT_RIGHT':  Only the front right color buffer is written. 
-%%
-%% `?GL_BACK_LEFT':  Only the back left color buffer is written. 
-%%
-%% `?GL_BACK_RIGHT':  Only the back right color buffer is written. 
-%%
-%% `?GL_FRONT':  Only the front left and front right color buffers are written. If there
-%% is no front right color buffer, only the front left color buffer is written. 
-%%
-%% `?GL_BACK':  Only the back left and back right color buffers are written. If there
-%% is no back right color buffer, only the back left color buffer is written. 
-%%
-%% `?GL_LEFT':  Only the front left and back left color buffers are written. If there
-%% is no back left color buffer, only the front left color buffer is written. 
-%%
-%% `?GL_RIGHT':  Only the front right and back right color buffers are written. If there
-%% is no back right color buffer, only the front right color buffer is written. 
-%%
-%% `?GL_FRONT_AND_BACK':  All the front and back color buffers (front left, front right,
-%% back left, back right) are written. If there are no back color buffers, only the front
-%% left and front right color buffers are written. If there are no right color buffers, only
-%% the front left and back left color buffers are written. If there are no right or back
-%% color buffers, only the front left color buffer is written. 
-%%
-%%  If more than one color buffer is selected for drawing, then blending or logical operations
-%% are computed and applied independently for each color buffer and can produce different
-%% results in each buffer. 
-%%
-%%  Monoscopic contexts include only `left' buffers, and stereoscopic contexts include
-%% both `left' and `right' buffers. Likewise, single-buffered contexts include
-%% only `front' buffers, and double-buffered contexts include both `front' and `back'
-%%  buffers. The context is selected at GL initialization. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawBuffer.xhtml">external</a> documentation.
 -spec drawBuffer(Mode) -> 'ok' when Mode :: enum().
 drawBuffer(Mode) ->
   cast(5058, <<Mode:?GLenum>>).
@@ -904,15 +605,7 @@ drawBuffer(Mode) ->
 %% the `i'th color attachment where `i' ranges from zero to the value of `?GL_MAX_COLOR_ATTACHMENTS'
 %%  minus one. 
 %%
-%%  Nonstereo double-buffered configurations have only a front left and a back left buffer.
-%% Single-buffered configurations have a front left and a front right buffer if stereo, and
-%% only a front left buffer if nonstereo. It is an error to specify a nonexistent buffer to ``gl:readBuffer''
-%% . 
-%%
-%%  `Mode'  is initially `?GL_FRONT' in single-buffered configurations and `?GL_BACK'
-%%  in double-buffered configurations. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glReadBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glReadBuffer.xhtml">external</a> documentation.
 -spec readBuffer(Mode) -> 'ok' when Mode :: enum().
 readBuffer(Mode) ->
   cast(5059, <<Mode:?GLenum>>).
@@ -925,104 +618,7 @@ readBuffer(Mode) ->
 %% is `?GL_FALSE'. The initial value for `?GL_DITHER' and `?GL_MULTISAMPLE'
 %% is `?GL_TRUE'. 
 %%
-%%  Both ``gl:enable'' and  {@link gl:enable/1}  take a single argument,  `Cap' , which
-%% can assume one of the following values: 
-%%
-%%  Some of the GL's capabilities are indexed. ``gl:enablei'' and ``gl:disablei'' enable
-%% and disable indexed capabilities. 
-%%
-%% `?GL_BLEND':  If enabled, blend the computed fragment color values with the values
-%% in the color buffers. See  {@link gl:blendFunc/2} . 
-%%
-%% `?GL_CLIP_DISTANCE'`i':  If enabled, clip geometry against user-defined half
-%% space `i'. 
-%%
-%% `?GL_COLOR_LOGIC_OP':  If enabled, apply the currently selected logical operation
-%% to the computed fragment color and color buffer values. See  {@link gl:logicOp/1} . 
-%%
-%% `?GL_CULL_FACE':  If enabled, cull polygons based on their winding in window coordinates.
-%% See  {@link gl:cullFace/1} . 
-%%
-%% `?GL_DEPTH_CLAMP':  If enabled, the -w c&amp;le; z c&amp;le; w c plane equation is
-%% ignored by view volume clipping (effectively, there is no near or far plane clipping).
-%% See  {@link gl:depthRange/2} . 
-%%
-%% `?GL_DEPTH_TEST':  If enabled, do depth comparisons and update the depth buffer.
-%% Note that even if the depth buffer exists and the depth mask is non-zero, the depth buffer
-%% is not updated if the depth test is disabled. See  {@link gl:depthFunc/1}  and  {@link gl:depthRange/2} 
-%% . 
-%%
-%% `?GL_DITHER':  If enabled, dither color components or indices before they are written
-%% to the color buffer. 
-%%
-%% `?GL_FRAMEBUFFER_SRGB':  If enabled and the value of `?GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING'
-%%  for the framebuffer attachment corresponding to the destination buffer is `?GL_SRGB',
-%% the R, G, and B destination color values (after conversion from fixed-point to floating-point)
-%% are considered to be encoded for the sRGB color space and hence are linearized prior to
-%% their use in blending. 
-%%
-%% `?GL_LINE_SMOOTH':  If enabled, draw lines with correct filtering. Otherwise, draw
-%% aliased lines. See  {@link gl:lineWidth/1} . 
-%%
-%% `?GL_MULTISAMPLE':  If enabled, use multiple fragment samples in computing the final
-%% color of a pixel. See  {@link gl:sampleCoverage/2} . 
-%%
-%% `?GL_POLYGON_OFFSET_FILL':  If enabled, and if the polygon is rendered in `?GL_FILL'
-%%  mode, an offset is added to depth values of a polygon's fragments before the depth comparison
-%% is performed. See  {@link gl:polygonOffset/2} . 
-%%
-%% `?GL_POLYGON_OFFSET_LINE':  If enabled, and if the polygon is rendered in `?GL_LINE'
-%%  mode, an offset is added to depth values of a polygon's fragments before the depth comparison
-%% is performed. See  {@link gl:polygonOffset/2} . 
-%%
-%% `?GL_POLYGON_OFFSET_POINT':  If enabled, an offset is added to depth values of a
-%% polygon's fragments before the depth comparison is performed, if the polygon is rendered
-%% in `?GL_POINT' mode. See  {@link gl:polygonOffset/2} . 
-%%
-%% `?GL_POLYGON_SMOOTH':  If enabled, draw polygons with proper filtering. Otherwise,
-%% draw aliased polygons. For correct antialiased polygons, an alpha buffer is needed and
-%% the polygons must be sorted front to back. 
-%%
-%% `?GL_PRIMITIVE_RESTART':  Enables primitive restarting. If enabled, any one of the
-%% draw commands  which transfers a set of generic attribute array elements to the GL will
-%% restart  the primitive when the index of the vertex is equal to the primitive restart
-%% index. See  {@link gl:primitiveRestartIndex/1} . 
-%%
-%% `?GL_SAMPLE_ALPHA_TO_COVERAGE':  If enabled, compute a temporary coverage value where
-%% each bit is determined by the alpha value at the corresponding sample location. The temporary
-%% coverage value is then ANDed with the fragment coverage value. 
-%%
-%% `?GL_SAMPLE_ALPHA_TO_ONE':  If enabled, each sample alpha value is replaced by the
-%% maximum representable alpha value. 
-%%
-%% `?GL_SAMPLE_COVERAGE':  If enabled, the fragment's coverage is ANDed with the temporary
-%% coverage value. If `?GL_SAMPLE_COVERAGE_INVERT' is set to `?GL_TRUE', invert
-%% the coverage value. See  {@link gl:sampleCoverage/2} . 
-%%
-%% `?GL_SAMPLE_SHADING':  If enabled, the active fragment shader is run once for each
-%% covered sample, or at fraction of this rate as determined by the current value of `?GL_MIN_SAMPLE_SHADING_VALUE'
-%% . See  {@link gl:minSampleShading/1} . 
-%%
-%% `?GL_SAMPLE_MASK':  If enabled, the sample coverage mask generated for a fragment
-%% during rasterization will be ANDed with the value of `?GL_SAMPLE_MASK_VALUE' before
-%% shading occurs. See  {@link gl:sampleMaski/2} . 
-%%
-%% `?GL_SCISSOR_TEST':  If enabled, discard fragments that are outside the scissor rectangle.
-%% See  {@link gl:scissor/4} . 
-%%
-%% `?GL_STENCIL_TEST':  If enabled, do stencil testing and update the stencil buffer.
-%% See  {@link gl:stencilFunc/3}  and  {@link gl:stencilOp/3} . 
-%%
-%% `?GL_TEXTURE_CUBE_MAP_SEAMLESS':  If enabled, cubemap textures are sampled such that
-%% when linearly sampling from the border between two adjacent faces, texels from both faces
-%% are used to generate the final sample value. When disabled, texels from only a single
-%% face are used to construct the final sample value. 
-%%
-%% `?GL_PROGRAM_POINT_SIZE':  If enabled and a vertex or geometry shader is active,
-%% then the derived point size is taken from the (potentially clipped) shader builtin `?gl_PointSize'
-%%  and clamped to the implementation-dependent point size range. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEnable.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glEnable.xhtml">external</a> documentation.
 -spec enable(Cap) -> 'ok' when Cap :: enum().
 enable(Cap) ->
   cast(5060, <<Cap:?GLenum>>).
@@ -1042,31 +638,7 @@ disable(Cap) ->
 %% all capabilities except `?GL_DITHER' are disabled; `?GL_DITHER' is initially
 %% enabled. 
 %%
-%%  The following capabilities are accepted for  `Cap' : <table><tbody><tr><td>` Constant '
-%% </td><td>` See '</td></tr></tbody><tbody><tr><td>`?GL_BLEND'</td><td> {@link gl:blendFunc/2} 
-%% ,  {@link gl:logicOp/1} </td></tr><tr><td>`?GL_CLIP_DISTANCE'`i'</td><td> {@link gl:enable/1} 
-%% </td></tr><tr><td>`?GL_COLOR_LOGIC_OP'</td><td> {@link gl:logicOp/1} </td></tr><tr><td>`?GL_CULL_FACE'
-%% </td><td> {@link gl:cullFace/1} </td></tr><tr><td>`?GL_DEPTH_CLAMP'</td><td> {@link gl:enable/1} 
-%% </td></tr><tr><td>`?GL_DEPTH_TEST'</td><td> {@link gl:depthFunc/1} ,  {@link gl:depthRange/2} 
-%% </td></tr><tr><td>`?GL_DITHER'</td><td> {@link gl:enable/1} </td></tr><tr><td>`?GL_FRAMEBUFFER_SRGB'
-%% </td><td> {@link gl:enable/1} </td></tr><tr><td>`?GL_LINE_SMOOTH'</td><td> {@link gl:lineWidth/1} 
-%% </td></tr><tr><td>`?GL_MULTISAMPLE'</td><td> {@link gl:sampleCoverage/2} </td></tr><tr><td>
-%% `?GL_POLYGON_SMOOTH'</td><td> {@link gl:polygonMode/2} </td></tr><tr><td>`?GL_POLYGON_OFFSET_FILL'
-%% </td><td> {@link gl:polygonOffset/2} </td></tr><tr><td>`?GL_POLYGON_OFFSET_LINE'</td><td>
-%%  {@link gl:polygonOffset/2} </td></tr><tr><td>`?GL_POLYGON_OFFSET_POINT'</td><td> {@link gl:polygonOffset/2} 
-%% </td></tr><tr><td>`?GL_PROGRAM_POINT_SIZE'</td><td> {@link gl:enable/1} </td></tr><tr><td>
-%% `?GL_PRIMITIVE_RESTART'</td><td> {@link gl:enable/1} ,  {@link gl:primitiveRestartIndex/1} </td>
-%% </tr><tr><td>`?GL_SAMPLE_ALPHA_TO_COVERAGE'</td><td> {@link gl:sampleCoverage/2} </td></tr>
-%% <tr><td>`?GL_SAMPLE_ALPHA_TO_ONE'</td><td> {@link gl:sampleCoverage/2} </td></tr><tr><td>
-%% `?GL_SAMPLE_COVERAGE'</td><td> {@link gl:sampleCoverage/2} </td></tr><tr><td>`?GL_SAMPLE_MASK'
-%% </td><td> {@link gl:enable/1} </td></tr><tr><td>`?GL_SCISSOR_TEST'</td><td> {@link gl:scissor/4} 
-%% </td></tr><tr><td>`?GL_STENCIL_TEST'</td><td> {@link gl:stencilFunc/3} ,  {@link gl:stencilOp/3} 
-%% </td></tr><tr><td>`?GL_TEXTURE_CUBEMAP_SEAMLESS'</td><td> {@link gl:enable/1} </td></tr>
-%% </tbody></table>
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsEnabled.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsEnabled.xhtml">external</a> documentation.
 -spec isEnabled(Cap) -> 0|1 when Cap :: enum().
 isEnabled(Cap) ->
   call(5062, <<Cap:?GLenum>>).
@@ -1078,47 +650,7 @@ isEnabled(Cap) ->
 %%  and  {@link gl:enableClientState/1}  take a single argument,  `Cap' , which can assume
 %% one of the following values: 
 %%
-%% `?GL_COLOR_ARRAY':  If enabled, the color array is enabled for writing and used during
-%% rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} ,
-%%  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%% is called. See  {@link gl:colorPointer/4} . 
-%%
-%% `?GL_EDGE_FLAG_ARRAY':  If enabled, the edge flag array is enabled for writing and
-%% used during rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} 
-%% ,  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%%  is called. See  {@link gl:edgeFlagPointer/2} . 
-%%
-%% `?GL_FOG_COORD_ARRAY':  If enabled, the fog coordinate array is enabled for writing
-%% and used during rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} 
-%% ,  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%%  is called. See  {@link gl:fogCoordPointer/3} . 
-%%
-%% `?GL_INDEX_ARRAY':  If enabled, the index array is enabled for writing and used during
-%% rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} ,
-%%  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%% is called. See  {@link gl:indexPointer/3} . 
-%%
-%% `?GL_NORMAL_ARRAY':  If enabled, the normal array is enabled for writing and used
-%% during rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} 
-%% ,  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%%  is called. See  {@link gl:normalPointer/3} . 
-%%
-%% `?GL_SECONDARY_COLOR_ARRAY':  If enabled, the secondary color array is enabled for
-%% writing and used during rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} 
-%% ,  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%%  is called. See  {@link gl:colorPointer/4} . 
-%%
-%% `?GL_TEXTURE_COORD_ARRAY':  If enabled, the texture coordinate array is enabled for
-%% writing and used during rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} 
-%% ,  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%%  is called. See  {@link gl:texCoordPointer/4} . 
-%%
-%% `?GL_VERTEX_ARRAY':  If enabled, the vertex array is enabled for writing and used
-%% during rendering when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} 
-%% ,  {@link gl:drawRangeElements/6}  {@link gl:multiDrawArrays/3} , or see `glMultiDrawElements'
-%%  is called. See  {@link gl:vertexPointer/4} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEnableClientState.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glEnableClientState.xml">external</a> documentation.
 -spec enableClientState(Cap) -> 'ok' when Cap :: enum().
 enableClientState(Cap) ->
   cast(5063, <<Cap:?GLenum>>).
@@ -1135,809 +667,7 @@ disableClientState(Cap) ->
 %% symbolic constant indicating the state variable to be returned, and  `Params'  is a
 %% pointer to an array of the indicated type in which to place the returned data. 
 %%
-%%  Type conversion is performed if  `Params'  has a different type than the state variable
-%% value being requested. If ``gl:getBooleanv'' is called, a floating-point (or integer)
-%% value is converted to `?GL_FALSE' if and only if it is 0.0 (or 0). Otherwise, it
-%% is converted to `?GL_TRUE'. If ``gl:getIntegerv'' is called, boolean values are
-%% returned as `?GL_TRUE' or `?GL_FALSE', and most floating-point values are rounded
-%% to the nearest integer value. Floating-point colors and normals, however, are returned
-%% with a linear mapping that maps 1.0 to the most positive representable integer value and
-%%   -1.0 to the most negative representable integer value. If ``gl:getFloatv'' or ``gl:getDoublev''
-%%  is called, boolean values are returned as `?GL_TRUE' or `?GL_FALSE', and integer
-%% values are converted to floating-point values. 
-%%
-%%  The following symbolic constants are accepted by  `Pname' : 
-%%
-%% `?GL_ACTIVE_TEXTURE':  `Params'  returns a single value indicating the active
-%% multitexture unit. The initial value is `?GL_TEXTURE0'. See  {@link gl:activeTexture/1} .
-%% 
-%%
-%% `?GL_ALIASED_LINE_WIDTH_RANGE':  `Params'  returns a pair of values indicating
-%% the range of widths supported for aliased lines. See  {@link gl:lineWidth/1} . 
-%%
-%% `?GL_ARRAY_BUFFER_BINDING':  `Params'  returns a single value, the name of the
-%% buffer object currently bound to the target `?GL_ARRAY_BUFFER'. If no buffer object
-%% is bound to this target, 0 is returned. The initial value is 0. See  {@link gl:bindBuffer/2} .
-%% 
-%%
-%% `?GL_BLEND':  `Params'  returns a single boolean value indicating whether blending
-%% is enabled. The initial value is `?GL_FALSE'. See  {@link gl:blendFunc/2} . 
-%%
-%% `?GL_BLEND_COLOR':  `Params'  returns four values, the red, green, blue, and alpha
-%% values which are the components of the blend color. See  {@link gl:blendColor/4} . 
-%%
-%% `?GL_BLEND_DST_ALPHA':  `Params'  returns one value, the symbolic constant identifying
-%% the alpha destination blend function. The initial value is `?GL_ZERO'. See  {@link gl:blendFunc/2} 
-%%  and  {@link gl:blendFuncSeparate/4} . 
-%%
-%% `?GL_BLEND_DST_RGB':  `Params'  returns one value, the symbolic constant identifying
-%% the RGB destination blend function. The initial value is `?GL_ZERO'. See  {@link gl:blendFunc/2} 
-%%  and  {@link gl:blendFuncSeparate/4} . 
-%%
-%% `?GL_BLEND_EQUATION_RGB':  `Params'  returns one value, a symbolic constant indicating
-%% whether the RGB blend equation is `?GL_FUNC_ADD', `?GL_FUNC_SUBTRACT',  `?GL_FUNC_REVERSE_SUBTRACT'
-%% , `?GL_MIN' or `?GL_MAX'. See  {@link gl:blendEquationSeparate/2} . 
-%%
-%% `?GL_BLEND_EQUATION_ALPHA':  `Params'  returns one value, a symbolic constant
-%% indicating whether the Alpha blend equation is `?GL_FUNC_ADD', `?GL_FUNC_SUBTRACT'
-%% ,  `?GL_FUNC_REVERSE_SUBTRACT', `?GL_MIN' or `?GL_MAX'. See  {@link gl:blendEquationSeparate/2} 
-%% . 
-%%
-%% `?GL_BLEND_SRC_ALPHA':  `Params'  returns one value, the symbolic constant identifying
-%% the alpha source blend function. The initial value is `?GL_ONE'. See  {@link gl:blendFunc/2} 
-%%  and  {@link gl:blendFuncSeparate/4} . 
-%%
-%% `?GL_BLEND_SRC_RGB':  `Params'  returns one value, the symbolic constant identifying
-%% the RGB source blend function. The initial value is `?GL_ONE'. See  {@link gl:blendFunc/2} 
-%%  and  {@link gl:blendFuncSeparate/4} . 
-%%
-%% `?GL_COLOR_CLEAR_VALUE':  `Params'  returns four values: the red, green, blue,
-%% and alpha values used to clear the color buffers. Integer values, if requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 returns the most
-%% positive representable integer value, and   -1.0 returns the most negative representable
-%% integer value. The initial value is (0, 0, 0, 0). See  {@link gl:clearColor/4} . 
-%%
-%% `?GL_COLOR_LOGIC_OP':  `Params'  returns a single boolean value indicating whether
-%% a fragment's RGBA color values are merged into the framebuffer using a logical operation.
-%% The initial value is `?GL_FALSE'. See  {@link gl:logicOp/1} . 
-%%
-%% `?GL_COLOR_WRITEMASK':  `Params'  returns four boolean values: the red, green,
-%% blue, and alpha write enables for the color buffers. The initial value is (`?GL_TRUE',
-%% `?GL_TRUE', `?GL_TRUE', `?GL_TRUE'). See  {@link gl:colorMask/4} . 
-%%
-%% `?GL_COMPRESSED_TEXTURE_FORMATS':  `Params'  returns a list of symbolic constants
-%% of length `?GL_NUM_COMPRESSED_TEXTURE_FORMATS'  indicating which compressed texture
-%% formats are available. See  {@link gl:compressedTexImage2D/8} . 
-%%
-%% `?GL_CONTEXT_FLAGS':  `Params'  returns one value, the flags with which the context
-%% was created (such as debugging functionality). 
-%%
-%% `?GL_CULL_FACE':  `Params'  returns a single boolean value indicating whether
-%% polygon culling is enabled. The initial value is `?GL_FALSE'. See  {@link gl:cullFace/1} 
-%% . 
-%%
-%% `?GL_CURRENT_PROGRAM':  `Params'  returns one value, the name of the program object
-%% that is currently active, or 0 if no program object is active. See  {@link gl:useProgram/1} .
-%% 
-%%
-%% `?GL_DEPTH_CLEAR_VALUE':  `Params'  returns one value, the value that is used
-%% to clear the depth buffer. Integer values, if requested, are linearly mapped from the
-%% internal floating-point representation such that 1.0 returns the most positive representable
-%% integer value, and   -1.0 returns the most negative representable integer value. The initial
-%% value is 1. See  {@link gl:clearDepth/1} . 
-%%
-%% `?GL_DEPTH_FUNC':  `Params'  returns one value, the symbolic constant that indicates
-%% the depth comparison function. The initial value is `?GL_LESS'. See  {@link gl:depthFunc/1} 
-%% . 
-%%
-%% `?GL_DEPTH_RANGE':  `Params'  returns two values: the near and far mapping limits
-%% for the depth buffer. Integer values, if requested, are linearly mapped from the internal
-%% floating-point representation such that 1.0 returns the most positive representable integer
-%% value, and   -1.0 returns the most negative representable integer value. The initial value
-%% is (0, 1). See  {@link gl:depthRange/2} . 
-%%
-%% `?GL_DEPTH_TEST':  `Params'  returns a single boolean value indicating whether
-%% depth testing of fragments is enabled. The initial value is `?GL_FALSE'. See  {@link gl:depthFunc/1} 
-%%  and  {@link gl:depthRange/2} . 
-%%
-%% `?GL_DEPTH_WRITEMASK':  `Params'  returns a single boolean value indicating if
-%% the depth buffer is enabled for writing. The initial value is `?GL_TRUE'. See  {@link gl:depthMask/1} 
-%% . 
-%%
-%% `?GL_DITHER':  `Params'  returns a single boolean value indicating whether dithering
-%% of fragment colors and indices is enabled. The initial value is `?GL_TRUE'. 
-%%
-%% `?GL_DOUBLEBUFFER':  `Params'  returns a single boolean value indicating whether
-%% double buffering is supported. 
-%%
-%% `?GL_DRAW_BUFFER':  `Params'  returns one value, a symbolic constant indicating
-%% which buffers are being drawn to. See  {@link gl:drawBuffer/1} . The initial value is `?GL_BACK'
-%%  if there are back buffers, otherwise it is `?GL_FRONT'. 
-%%
-%% `?GL_DRAW_BUFFER'`i':  `Params'  returns one value, a symbolic constant indicating
-%% which buffers are being drawn to by the corresponding output color. See  {@link gl:drawBuffers/1} 
-%% .  The initial value of `?GL_DRAW_BUFFER0' is `?GL_BACK' if there are back buffers,
-%% otherwise it is `?GL_FRONT'. The initial values of draw buffers for all other output
-%% colors is `?GL_NONE'. 
-%%
-%% `?GL_DRAW_FRAMEBUFFER_BINDING':  `Params'  returns one value, the name of the
-%% framebuffer object currently bound to the `?GL_DRAW_FRAMEBUFFER' target. If the default
-%% framebuffer is bound, this value will be zero. The initial value is zero. See  {@link gl:bindFramebuffer/2} 
-%% . 
-%%
-%% `?GL_READ_FRAMEBUFFER_BINDING':  `Params'  returns one value, the name of the
-%% framebuffer object currently bound to the `?GL_READ_FRAMEBUFFER' target. If the default
-%% framebuffer is bound, this value will be zero. The initial value is zero. See  {@link gl:bindFramebuffer/2} 
-%% . 
-%%
-%% `?GL_ELEMENT_ARRAY_BUFFER_BINDING':  `Params'  returns a single value, the name
-%% of the buffer object currently bound to the target `?GL_ELEMENT_ARRAY_BUFFER'. If
-%% no buffer object is bound to this target, 0 is returned. The initial value is 0. See  {@link gl:bindBuffer/2} 
-%% . 
-%%
-%% `?GL_FRAGMENT_SHADER_DERIVATIVE_HINT':  `Params'  returns one value, a symbolic
-%% constant indicating the mode of the derivative accuracy hint  for fragment shaders. The
-%% initial value is `?GL_DONT_CARE'. See  {@link gl:hint/2} . 
-%%
-%% `?GL_IMPLEMENTATION_COLOR_READ_FORMAT':  `Params'  returns a single GLenum value
-%% indicating the implementation's preferred pixel data format. See  {@link gl:readPixels/7} . 
-%%
-%% `?GL_IMPLEMENTATION_COLOR_READ_TYPE':  `Params'  returns a single GLenum value
-%% indicating the implementation's preferred pixel data type. See  {@link gl:readPixels/7} . 
-%%
-%% `?GL_LINE_SMOOTH':  `Params'  returns a single boolean value indicating whether
-%% antialiasing of lines is enabled. The initial value is `?GL_FALSE'. See  {@link gl:lineWidth/1} 
-%% . 
-%%
-%% `?GL_LINE_SMOOTH_HINT':  `Params'  returns one value, a symbolic constant indicating
-%% the mode of the line antialiasing hint. The initial value is `?GL_DONT_CARE'. See  {@link gl:hint/2} 
-%% . 
-%%
-%% `?GL_LINE_WIDTH':  `Params'  returns one value, the line width as specified with  {@link gl:lineWidth/1} 
-%% . The initial value is 1. 
-%%
-%% `?GL_LAYER_PROVOKING_VERTEX':  `Params'  returns one value, the implementation
-%% dependent specifc vertex of a primitive that is used to select the rendering layer.  If
-%% the value returned is equivalent to `?GL_PROVOKING_VERTEX', then the vertex  selection
-%% follows the convention specified by  {@link gl:provokingVertex/1} . If the value returned
-%% is equivalent to `?GL_FIRST_VERTEX_CONVENTION', then the  selection is always taken
-%% from the first vertex in the primitive. If the value returned is equivalent to `?GL_LAST_VERTEX_CONVENTION'
-%% , then the  selection is always taken from the last vertex in the primitive. If the value
-%% returned is equivalent to `?GL_UNDEFINED_VERTEX', then the  selection is not guaranteed
-%% to be taken from any specific vertex in the primitive. 
-%%
-%% `?GL_LINE_WIDTH_GRANULARITY':  `Params'  returns one value, the width difference
-%% between adjacent supported widths for antialiased lines. See  {@link gl:lineWidth/1} . 
-%%
-%% `?GL_LINE_WIDTH_RANGE':  `Params'  returns two values: the smallest and largest
-%% supported widths for antialiased lines. See  {@link gl:lineWidth/1} . 
-%%
-%% `?GL_LOGIC_OP_MODE':  `Params'  returns one value, a symbolic constant indicating
-%% the selected logic operation mode. The initial value is `?GL_COPY'. See  {@link gl:logicOp/1} 
-%% . 
-%%
-%% `?GL_MAJOR_VERSION':  `Params'  returns one value, the major version number of
-%% the OpenGL API supported by the current context. 
-%%
-%% `?GL_MAX_3D_TEXTURE_SIZE':  `Params'  returns one value, a rough estimate of the
-%% largest 3D texture that the GL can handle. The value must be at least 64. Use `?GL_PROXY_TEXTURE_3D'
-%%  to determine if a texture is too large. See  {@link gl:texImage3D/10} . 
-%%
-%% `?GL_MAX_ARRAY_TEXTURE_LAYERS':  `Params'  returns one value. The value indicates
-%% the maximum number of layers allowed in an array texture, and must be at least 256. See  {@link gl:texImage2D/9} 
-%% . 
-%%
-%% `?GL_MAX_CLIP_DISTANCES':  `Params'  returns one value, the maximum number of
-%% application-defined clipping distances. The value must be at least 8. 
-%%
-%% `?GL_MAX_COLOR_TEXTURE_SAMPLES':  `Params'  returns one value, the maximum number
-%% of samples in a color multisample texture. 
-%%
-%% `?GL_MAX_COMBINED_ATOMIC_COUNTERS':  `Params'  returns a single value, the maximum
-%% number of atomic counters available to all active shaders. 
-%%
-%% `?GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS':  `Params'  returns one value,
-%% the number of words for fragment shader uniform variables in all uniform blocks (including
-%% default). The value must be at least 1. See  {@link gl:uniform1f/2} . 
-%%
-%% `?GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS':  `Params'  returns one value,
-%% the number of words for geometry shader uniform variables in all uniform blocks (including
-%% default). The value must be at least 1. See  {@link gl:uniform1f/2} . 
-%%
-%% `?GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS':  `Params'  returns one value, the maximum
-%% supported texture image units that  can be used to access texture maps from the vertex
-%% shader and the fragment processor combined.  If both the vertex shader and the fragment
-%% processing stage access the same texture image unit, then that counts as using two texture
-%% image units against this limit. The value must be at least 48. See  {@link gl:activeTexture/1} 
-%% . 
-%%
-%% `?GL_MAX_COMBINED_UNIFORM_BLOCKS':  `Params'  returns one value, the maximum number
-%% of uniform blocks per program. The value must be at least 36. See  {@link gl:uniformBlockBinding/3} 
-%% . 
-%%
-%% `?GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS':  `Params'  returns one value, the
-%% number of words for vertex shader uniform variables in all uniform blocks (including default).
-%% The value must be at least 1. See  {@link gl:uniform1f/2} . 
-%%
-%% `?GL_MAX_CUBE_MAP_TEXTURE_SIZE':  `Params'  returns one value. The value gives
-%% a rough estimate of the largest cube-map texture that the GL can handle. The value must
-%% be at least 1024. Use `?GL_PROXY_TEXTURE_CUBE_MAP' to determine if a texture is too
-%% large. See  {@link gl:texImage2D/9} . 
-%%
-%% `?GL_MAX_DEPTH_TEXTURE_SAMPLES':  `Params'  returns one value, the maximum number
-%% of samples in a multisample depth or depth-stencil texture. 
-%%
-%% `?GL_MAX_DRAW_BUFFERS':  `Params'  returns one value, the maximum number of simultaneous
-%% outputs that may be written in a fragment shader. The value must be at least 8. See  {@link gl:drawBuffers/1} 
-%% . 
-%%
-%% `?GL_MAX_DUALSOURCE_DRAW_BUFFERS':  `Params'  returns one value, the maximum number
-%% of active draw buffers when using dual-source blending. The value must be at least 1.
-%% See  {@link gl:blendFunc/2}  and   {@link gl:blendFuncSeparate/4} . 
-%%
-%% `?GL_MAX_ELEMENTS_INDICES':  `Params'  returns one value, the recommended maximum
-%% number of vertex array indices. See  {@link gl:drawRangeElements/6} . 
-%%
-%% `?GL_MAX_ELEMENTS_VERTICES':  `Params'  returns one value, the recommended maximum
-%% number of vertex array vertices. See  {@link gl:drawRangeElements/6} . 
-%%
-%% `?GL_MAX_FRAGMENT_ATOMIC_COUNTERS':  `Params'  returns a single value, the maximum
-%% number of atomic counters available to fragment shaders. 
-%%
-%% `?GL_MAX_FRAGMENT_INPUT_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of components of the inputs read by the fragment shader, which must be at least
-%% 128. 
-%%
-%% `?GL_MAX_FRAGMENT_UNIFORM_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of individual floating-point, integer, or boolean values that can be held  in uniform
-%% variable storage for a fragment shader. The value must be at least 1024. See  {@link gl:uniform1f/2} 
-%% . 
-%%
-%% `?GL_MAX_FRAGMENT_UNIFORM_VECTORS':  `Params'  returns one value, the maximum
-%% number of individual 4-vectors of floating-point, integer, or boolean values that can
-%% be held in uniform variable storage for a fragment shader. The value is equal to the value
-%% of `?GL_MAX_FRAGMENT_UNIFORM_COMPONENTS' divided by 4 and must be at least 256. See  {@link gl:uniform1f/2} 
-%% . 
-%%
-%% `?GL_MAX_FRAGMENT_UNIFORM_BLOCKS':  `Params'  returns one value, the maximum number
-%% of uniform blocks per fragment shader. The value must be at least 12. See  {@link gl:uniformBlockBinding/3} 
-%% . 
-%%
-%% `?GL_MAX_GEOMETRY_ATOMIC_COUNTERS':  `Params'  returns a single value, the maximum
-%% number of atomic counters available to geometry shaders. 
-%%
-%% `?GL_MAX_GEOMETRY_INPUT_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of components of inputs read by a geometry shader, which must be at least 64. 
-%%
-%% `?GL_MAX_GEOMETRY_OUTPUT_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of components of outputs written by a geometry shader, which must be at least 128.
-%% 
-%%
-%% `?GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS':  `Params'  returns one value, the maximum
-%% supported texture image units that  can be used to access texture maps from the geometry
-%% shader. The value must be at least 16. See  {@link gl:activeTexture/1} . 
-%%
-%% `?GL_MAX_GEOMETRY_UNIFORM_BLOCKS':  `Params'  returns one value, the maximum number
-%% of uniform blocks per geometry shader. The value must be at least 12. See  {@link gl:uniformBlockBinding/3} 
-%% . 
-%%
-%% `?GL_MAX_GEOMETRY_UNIFORM_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of individual floating-point, integer, or boolean values that can be held  in uniform
-%% variable storage for a geometry shader. The value must be at least 1024. See  {@link gl:uniform1f/2} 
-%% . 
-%%
-%% `?GL_MAX_INTEGER_SAMPLES':  `Params'  returns one value, the maximum number of
-%% samples supported in integer format multisample buffers. 
-%%
-%% `?GL_MIN_MAP_BUFFER_ALIGNMENT':  `Params'  returns one value, the minimum alignment
-%% in basic machine units of pointers returned fromsee `glMapBuffer' and see `glMapBufferRange'
-%% . This value must be a power of two and must be at least 64. 
-%%
-%% `?GL_MAX_PROGRAM_TEXEL_OFFSET':  `Params'  returns one value, the maximum texel
-%% offset allowed in a texture lookup, which must be at least 7. 
-%%
-%% `?GL_MIN_PROGRAM_TEXEL_OFFSET':  `Params'  returns one value, the minimum texel
-%% offset allowed in a texture lookup, which must be at most -8. 
-%%
-%% `?GL_MAX_RECTANGLE_TEXTURE_SIZE':  `Params'  returns one value. The value gives
-%% a rough estimate of the largest rectangular texture that the GL can handle. The value
-%% must be at least 1024. Use `?GL_PROXY_RECTANGLE_TEXTURE' to determine if a texture
-%% is too large. See  {@link gl:texImage2D/9} . 
-%%
-%% `?GL_MAX_RENDERBUFFER_SIZE':  `Params'  returns one value. The value indicates
-%% the maximum supported size for renderbuffers. See  {@link gl:framebufferRenderbuffer/4} . 
-%%
-%% `?GL_MAX_SAMPLE_MASK_WORDS':  `Params'  returns one value, the maximum number
-%% of sample mask words. 
-%%
-%% `?GL_MAX_SERVER_WAIT_TIMEOUT':  `Params'  returns one value, the maximum  {@link gl:waitSync/3} 
-%%  timeout interval. 
-%%
-%% `?GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS':  `Params'  returns a single value, the
-%% maximum number of atomic counters available to tessellation control shaders. 
-%%
-%% `?GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS':  `Params'  returns a single value,
-%% the maximum number of atomic counters available to tessellation evaluation shaders. 
-%%
-%% `?GL_MAX_TEXTURE_BUFFER_SIZE':  `Params'  returns one value. The value gives the
-%% maximum number of texels allowed in the texel array of a texture buffer object. Value
-%% must be at least 65536. 
-%%
-%% `?GL_MAX_TEXTURE_IMAGE_UNITS':  `Params'  returns one value, the maximum supported
-%% texture image units that  can be used to access texture maps from the fragment shader.
-%%  The value must be at least 16. See  {@link gl:activeTexture/1} . 
-%%
-%% `?GL_MAX_TEXTURE_LOD_BIAS':  `Params'  returns one value, the maximum, absolute
-%% value of the texture level-of-detail bias. The value must be at least 2.0. 
-%%
-%% `?GL_MAX_TEXTURE_SIZE':  `Params'  returns one value. The value gives a rough
-%% estimate of the largest texture that the GL can handle. The value must be at least 1024.
-%% Use a proxy texture target such as `?GL_PROXY_TEXTURE_1D' or `?GL_PROXY_TEXTURE_2D'
-%%  to determine if a texture is too large. See  {@link gl:texImage1D/8}  and  {@link gl:texImage2D/9} 
-%% . 
-%%
-%% `?GL_MAX_UNIFORM_BUFFER_BINDINGS':  `Params'  returns one value, the maximum number
-%% of uniform buffer binding points on the context, which must be at least 36. 
-%%
-%% `?GL_MAX_UNIFORM_BLOCK_SIZE':  `Params'  returns one value, the maximum size in
-%% basic machine units of a uniform block, which must be at least 16384. 
-%%
-%% `?GL_MAX_VARYING_COMPONENTS':  `Params'  returns one value, the number components
-%% for varying variables, which must be at least 60. 
-%%
-%% `?GL_MAX_VARYING_VECTORS':  `Params'  returns one value, the number 4-vectors
-%% for varying variables, which is equal to the value of `?GL_MAX_VARYING_COMPONENTS'
-%% and must be at least 15. 
-%%
-%% `?GL_MAX_VARYING_FLOATS':  `Params'  returns one value, the maximum number of
-%% interpolators available for processing varying variables used by vertex and fragment shaders.
-%% This value represents the number of individual floating-point  values that can be interpolated;
-%% varying variables declared as vectors, matrices, and arrays  will all consume multiple
-%% interpolators. The value must be at least 32. 
-%%
-%% `?GL_MAX_VERTEX_ATOMIC_COUNTERS':  `Params'  returns a single value, the maximum
-%% number of atomic counters available to vertex shaders. 
-%%
-%% `?GL_MAX_VERTEX_ATTRIBS':  `Params'  returns one value, the maximum number of
-%% 4-component generic vertex attributes accessible to a vertex shader.  The value must be
-%% at least 16. See  {@link gl:vertexAttrib1d/2} . 
-%%
-%% `?GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS':  `Params'  returns one value, the maximum
-%% supported texture image units that  can be used to access texture maps from the vertex
-%% shader. The value may be at least 16. See  {@link gl:activeTexture/1} . 
-%%
-%% `?GL_MAX_VERTEX_UNIFORM_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of individual floating-point, integer, or boolean values that can be held  in uniform
-%% variable storage for a vertex shader. The value must be at least 1024. See  {@link gl:uniform1f/2} 
-%% . 
-%%
-%% `?GL_MAX_VERTEX_UNIFORM_VECTORS':  `Params'  returns one value, the maximum number
-%% of 4-vectors that may be held in uniform variable storage for the vertex shader. The value
-%% of `?GL_MAX_VERTEX_UNIFORM_VECTORS' is equal to the value of `?GL_MAX_VERTEX_UNIFORM_COMPONENTS'
-%%  and must be at least 256. 
-%%
-%% `?GL_MAX_VERTEX_OUTPUT_COMPONENTS':  `Params'  returns one value, the maximum
-%% number of components of output written by a vertex shader, which must be at least 64. 
-%%
-%% `?GL_MAX_VERTEX_UNIFORM_BLOCKS':  `Params'  returns one value, the maximum number
-%% of uniform blocks per vertex shader. The value must be at least 12. See  {@link gl:uniformBlockBinding/3} 
-%% . 
-%%
-%% `?GL_MAX_VIEWPORT_DIMS':  `Params'  returns two values: the maximum supported
-%% width and height of the viewport. These must be at least as large as the visible dimensions
-%% of the display being rendered to. See  {@link gl:viewport/4} . 
-%%
-%% `?GL_MAX_VIEWPORTS':  `Params'  returns one value, the maximum number of simultaneous
-%% viewports that are supported. The value must be at least 16. See  {@link gl:viewportIndexedf/5} 
-%% . 
-%%
-%% `?GL_MINOR_VERSION':  `Params'  returns one value, the minor version number of
-%% the OpenGL API supported by the current context. 
-%%
-%% `?GL_NUM_COMPRESSED_TEXTURE_FORMATS':  `Params'  returns a single integer value
-%% indicating the number of available compressed texture formats. The minimum value is 4.
-%% See  {@link gl:compressedTexImage2D/8} . 
-%%
-%% `?GL_NUM_EXTENSIONS':  `Params'  returns one value, the number of extensions supported
-%% by the GL implementation for the current context. See  {@link gl:getString/1} . 
-%%
-%% `?GL_NUM_PROGRAM_BINARY_FORMATS':  `Params'  returns one value, the number of
-%% program binary formats supported by the implementation. 
-%%
-%% `?GL_NUM_SHADER_BINARY_FORMATS':  `Params'  returns one value, the number of binary
-%% shader formats supported by the implementation. If this value is greater than zero, then
-%% the implementation supports loading binary shaders. If it is zero, then the loading of
-%% binary shaders by the implementation is not supported. 
-%%
-%% `?GL_PACK_ALIGNMENT':  `Params'  returns one value, the byte alignment used for
-%% writing pixel data to memory. The initial value is 4. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_PACK_IMAGE_HEIGHT':  `Params'  returns one value, the image height used for
-%% writing pixel data to memory. The initial value is 0. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_PACK_LSB_FIRST':  `Params'  returns a single boolean value indicating whether
-%% single-bit pixels being written to memory are written first to the least significant bit
-%% of each unsigned byte. The initial value is `?GL_FALSE'. See  {@link gl:pixelStoref/2} .
-%% 
-%%
-%% `?GL_PACK_ROW_LENGTH':  `Params'  returns one value, the row length used for writing
-%% pixel data to memory. The initial value is 0. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_PACK_SKIP_IMAGES':  `Params'  returns one value, the number of pixel images
-%% skipped before the first pixel is written into memory. The initial value is 0. See  {@link gl:pixelStoref/2} 
-%% . 
-%%
-%% `?GL_PACK_SKIP_PIXELS':  `Params'  returns one value, the number of pixel locations
-%% skipped before the first pixel is written into memory. The initial value is 0. See  {@link gl:pixelStoref/2} 
-%% . 
-%%
-%% `?GL_PACK_SKIP_ROWS':  `Params'  returns one value, the number of rows of pixel
-%% locations skipped before the first pixel is written into memory. The initial value is
-%% 0. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_PACK_SWAP_BYTES':  `Params'  returns a single boolean value indicating whether
-%% the bytes of two-byte and four-byte pixel indices and components are swapped before being
-%% written to memory. The initial value is `?GL_FALSE'. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_PIXEL_PACK_BUFFER_BINDING':  `Params'  returns a single value, the name of
-%% the buffer object currently bound to the target `?GL_PIXEL_PACK_BUFFER'. If no buffer
-%% object is bound to this target, 0 is returned. The initial value is 0. See  {@link gl:bindBuffer/2} 
-%% . 
-%%
-%% `?GL_PIXEL_UNPACK_BUFFER_BINDING':  `Params'  returns a single value, the name
-%% of the buffer object currently bound to the target `?GL_PIXEL_UNPACK_BUFFER'. If
-%% no buffer object is bound to this target, 0 is returned. The initial value is 0. See  {@link gl:bindBuffer/2} 
-%% . 
-%%
-%% `?GL_POINT_FADE_THRESHOLD_SIZE':  `Params'  returns one value, the point size
-%% threshold for determining the point size. See  {@link gl:pointParameterf/2} . 
-%%
-%% `?GL_PRIMITIVE_RESTART_INDEX':  `Params'  returns one value, the current primitive
-%% restart index. The initial value is 0. See  {@link gl:primitiveRestartIndex/1} . 
-%%
-%% `?GL_PROGRAM_BINARY_FORMATS':  `Params'  an array of `?GL_NUM_PROGRAM_BINARY_FORMATS'
-%%  values, indicating the proram binary formats supported by the implementation. 
-%%
-%% `?GL_PROGRAM_PIPELINE_BINDING':  `Params'  a single value, the name of the currently
-%% bound program pipeline object, or zero if no program pipeline object is bound. See  {@link gl:bindProgramPipeline/1} 
-%% . 
-%%
-%% `?GL_PROVOKING_VERTEX':  `Params'  returns one value, the currently selected provoking
-%% vertex convention. The initial value is `?GL_LAST_VERTEX_CONVENTION'. See  {@link gl:provokingVertex/1} 
-%% . 
-%%
-%% `?GL_POINT_SIZE':  `Params'  returns one value, the point size as specified by  {@link gl:pointSize/1} 
-%% . The initial value is 1. 
-%%
-%% `?GL_POINT_SIZE_GRANULARITY':  `Params'  returns one value, the size difference
-%% between adjacent supported sizes for antialiased points. See  {@link gl:pointSize/1} . 
-%%
-%% `?GL_POINT_SIZE_RANGE':  `Params'  returns two values: the smallest and largest
-%% supported sizes for antialiased points. The smallest size must be at most 1, and the largest
-%% size must be at least 1. See  {@link gl:pointSize/1} . 
-%%
-%% `?GL_POLYGON_OFFSET_FACTOR':  `Params'  returns one value, the scaling factor
-%% used to determine the variable offset that is added to the depth value of each fragment
-%% generated when a polygon is rasterized. The initial value is 0. See  {@link gl:polygonOffset/2} 
-%% . 
-%%
-%% `?GL_POLYGON_OFFSET_UNITS':  `Params'  returns one value. This value is multiplied
-%% by an implementation-specific value and then added to the depth value of each fragment
-%% generated when a polygon is rasterized. The initial value is 0. See  {@link gl:polygonOffset/2} 
-%% . 
-%%
-%% `?GL_POLYGON_OFFSET_FILL':  `Params'  returns a single boolean value indicating
-%% whether polygon offset is enabled for polygons in fill mode. The initial value is `?GL_FALSE'
-%% . See  {@link gl:polygonOffset/2} . 
-%%
-%% `?GL_POLYGON_OFFSET_LINE':  `Params'  returns a single boolean value indicating
-%% whether polygon offset is enabled for polygons in line mode. The initial value is `?GL_FALSE'
-%% . See  {@link gl:polygonOffset/2} . 
-%%
-%% `?GL_POLYGON_OFFSET_POINT':  `Params'  returns a single boolean value indicating
-%% whether polygon offset is enabled for polygons in point mode. The initial value is `?GL_FALSE'
-%% . See  {@link gl:polygonOffset/2} . 
-%%
-%% `?GL_POLYGON_SMOOTH':  `Params'  returns a single boolean value indicating whether
-%% antialiasing of polygons is enabled. The initial value is `?GL_FALSE'. See  {@link gl:polygonMode/2} 
-%% . 
-%%
-%% `?GL_POLYGON_SMOOTH_HINT':  `Params'  returns one value, a symbolic constant indicating
-%% the mode of the polygon antialiasing hint. The initial value is `?GL_DONT_CARE'.
-%% See  {@link gl:hint/2} . 
-%%
-%% `?GL_READ_BUFFER':  `Params'  returns one value, a symbolic constant indicating
-%% which color buffer is selected for reading. The initial value is `?GL_BACK' if there
-%% is a back buffer, otherwise it is `?GL_FRONT'. See  {@link gl:readPixels/7} . 
-%%
-%% `?GL_RENDERBUFFER_BINDING':  `Params'  returns a single value, the name of the
-%% renderbuffer object currently bound to the target `?GL_RENDERBUFFER'. If no renderbuffer
-%% object is bound to this target, 0 is returned. The initial value is 0. See  {@link gl:bindRenderbuffer/2} 
-%% . 
-%%
-%% `?GL_SAMPLE_BUFFERS':  `Params'  returns a single integer value indicating the
-%% number of sample buffers associated with the framebuffer. See  {@link gl:sampleCoverage/2} .
-%% 
-%%
-%% `?GL_SAMPLE_COVERAGE_VALUE':  `Params'  returns a single positive floating-point
-%% value indicating the current sample coverage value. See  {@link gl:sampleCoverage/2} . 
-%%
-%% `?GL_SAMPLE_COVERAGE_INVERT':  `Params'  returns a single boolean value indicating
-%% if the temporary coverage value should be inverted. See  {@link gl:sampleCoverage/2} . 
-%%
-%% `?GL_SAMPLER_BINDING':  `Params'  returns a single value, the name of the sampler
-%% object currently bound to the active texture unit. The initial value is 0. See  {@link gl:bindSampler/2} 
-%% . 
-%%
-%% `?GL_SAMPLES':  `Params'  returns a single integer value indicating the coverage
-%% mask size. See  {@link gl:sampleCoverage/2} . 
-%%
-%% `?GL_SCISSOR_BOX':  `Params'  returns four values: the   x and   y window coordinates
-%% of the scissor box, followed by its width and height. Initially the   x and   y window
-%% coordinates are both 0 and the width and height are set to the size of the window. See  {@link gl:scissor/4} 
-%% . 
-%%
-%% `?GL_SCISSOR_TEST':  `Params'  returns a single boolean value indicating whether
-%% scissoring is enabled. The initial value is `?GL_FALSE'. See  {@link gl:scissor/4} . 
-%%
-%% `?GL_SHADER_COMPILER':  `Params'  returns a single boolean value indicating whether
-%% an online shader compiler is present in the implementation. All desktop OpenGL implementations
-%% must support online shader compilations, and therefore the value of `?GL_SHADER_COMPILER'
-%%  will always be `?GL_TRUE'. 
-%%
-%% `?GL_SMOOTH_LINE_WIDTH_RANGE':  `Params'  returns a pair of values indicating
-%% the range of widths supported for smooth (antialiased) lines. See  {@link gl:lineWidth/1} . 
-%%
-%% `?GL_SMOOTH_LINE_WIDTH_GRANULARITY':  `Params'  returns a single value indicating
-%% the level of quantization applied to smooth line width parameters. 
-%%
-%% `?GL_STENCIL_BACK_FAIL':  `Params'  returns one value, a symbolic constant indicating
-%% what action is taken for back-facing polygons when the stencil test fails. The initial
-%% value is `?GL_KEEP'. See  {@link gl:stencilOpSeparate/4} . 
-%%
-%% `?GL_STENCIL_BACK_FUNC':  `Params'  returns one value, a symbolic constant indicating
-%% what function is used for back-facing polygons to compare the stencil reference value
-%% with the stencil buffer value. The initial value is `?GL_ALWAYS'. See  {@link gl:stencilFuncSeparate/4} 
-%% . 
-%%
-%% `?GL_STENCIL_BACK_PASS_DEPTH_FAIL':  `Params'  returns one value, a symbolic constant
-%% indicating what action is taken for back-facing polygons when the stencil test passes,
-%% but the depth test fails. The initial value is `?GL_KEEP'. See  {@link gl:stencilOpSeparate/4} 
-%% . 
-%%
-%% `?GL_STENCIL_BACK_PASS_DEPTH_PASS':  `Params'  returns one value, a symbolic constant
-%% indicating what action is taken for back-facing polygons when the stencil test passes
-%% and the depth test passes. The initial value is `?GL_KEEP'. See  {@link gl:stencilOpSeparate/4} 
-%% . 
-%%
-%% `?GL_STENCIL_BACK_REF':  `Params'  returns one value, the reference value that
-%% is compared with the contents of the stencil buffer for back-facing polygons. The initial
-%% value is 0. See  {@link gl:stencilFuncSeparate/4} . 
-%%
-%% `?GL_STENCIL_BACK_VALUE_MASK':  `Params'  returns one value, the mask that is
-%% used for back-facing polygons to mask both the stencil reference value and the stencil
-%% buffer value before they are compared. The initial value is all 1's. See  {@link gl:stencilFuncSeparate/4} 
-%% . 
-%%
-%% `?GL_STENCIL_BACK_WRITEMASK':  `Params'  returns one value, the mask that controls
-%% writing of the stencil bitplanes for back-facing polygons. The initial value is all 1's.
-%% See  {@link gl:stencilMaskSeparate/2} . 
-%%
-%% `?GL_STENCIL_CLEAR_VALUE':  `Params'  returns one value, the index to which the
-%% stencil bitplanes are cleared. The initial value is 0. See  {@link gl:clearStencil/1} . 
-%%
-%% `?GL_STENCIL_FAIL':  `Params'  returns one value, a symbolic constant indicating
-%% what action is taken when the stencil test fails. The initial value is `?GL_KEEP'.
-%% See  {@link gl:stencilOp/3} . This stencil state only affects non-polygons and front-facing
-%% polygons. Back-facing polygons use separate stencil state. See  {@link gl:stencilOpSeparate/4} 
-%% . 
-%%
-%% `?GL_STENCIL_FUNC':  `Params'  returns one value, a symbolic constant indicating
-%% what function is used to compare the stencil reference value with the stencil buffer value.
-%% The initial value is `?GL_ALWAYS'. See  {@link gl:stencilFunc/3} . This stencil state
-%% only affects non-polygons and front-facing polygons. Back-facing polygons use separate
-%% stencil state. See  {@link gl:stencilFuncSeparate/4} . 
-%%
-%% `?GL_STENCIL_PASS_DEPTH_FAIL':  `Params'  returns one value, a symbolic constant
-%% indicating what action is taken when the stencil test passes, but the depth test fails.
-%% The initial value is `?GL_KEEP'. See  {@link gl:stencilOp/3} . This stencil state only
-%% affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil
-%% state. See  {@link gl:stencilOpSeparate/4} . 
-%%
-%% `?GL_STENCIL_PASS_DEPTH_PASS':  `Params'  returns one value, a symbolic constant
-%% indicating what action is taken when the stencil test passes and the depth test passes.
-%% The initial value is `?GL_KEEP'. See  {@link gl:stencilOp/3} . This stencil state only
-%% affects non-polygons and front-facing polygons. Back-facing polygons use separate stencil
-%% state. See  {@link gl:stencilOpSeparate/4} . 
-%%
-%% `?GL_STENCIL_REF':  `Params'  returns one value, the reference value that is compared
-%% with the contents of the stencil buffer. The initial value is 0. See  {@link gl:stencilFunc/3} 
-%% . This stencil state only affects non-polygons and front-facing polygons. Back-facing
-%% polygons use separate stencil state. See  {@link gl:stencilFuncSeparate/4} . 
-%%
-%% `?GL_STENCIL_TEST':  `Params'  returns a single boolean value indicating whether
-%% stencil testing of fragments is enabled. The initial value is `?GL_FALSE'. See  {@link gl:stencilFunc/3} 
-%%  and  {@link gl:stencilOp/3} . 
-%%
-%% `?GL_STENCIL_VALUE_MASK':  `Params'  returns one value, the mask that is used
-%% to mask both the stencil reference value and the stencil buffer value before they are
-%% compared. The initial value is all 1's. See  {@link gl:stencilFunc/3} . This stencil state
-%% only affects non-polygons and front-facing polygons. Back-facing polygons use separate
-%% stencil state. See  {@link gl:stencilFuncSeparate/4} . 
-%%
-%% `?GL_STENCIL_WRITEMASK':  `Params'  returns one value, the mask that controls
-%% writing of the stencil bitplanes. The initial value is all 1's. See  {@link gl:stencilMask/1} 
-%% . This stencil state only affects non-polygons and front-facing polygons. Back-facing
-%% polygons use separate stencil state. See  {@link gl:stencilMaskSeparate/2} . 
-%%
-%% `?GL_STEREO':  `Params'  returns a single boolean value indicating whether stereo
-%% buffers (left and right) are supported. 
-%%
-%% `?GL_SUBPIXEL_BITS':  `Params'  returns one value, an estimate of the number of
-%% bits of subpixel resolution that are used to position rasterized geometry in window coordinates.
-%% The value must be at least 4. 
-%%
-%% `?GL_TEXTURE_BINDING_1D':  `Params'  returns a single value, the name of the texture
-%% currently bound to the target `?GL_TEXTURE_1D'. The initial value is 0. See  {@link gl:bindTexture/2} 
-%% . 
-%%
-%% `?GL_TEXTURE_BINDING_1D_ARRAY':  `Params'  returns a single value, the name of
-%% the texture currently bound to the target `?GL_TEXTURE_1D_ARRAY'. The initial value
-%% is 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_BINDING_2D':  `Params'  returns a single value, the name of the texture
-%% currently bound to the target `?GL_TEXTURE_2D'. The initial value is 0. See  {@link gl:bindTexture/2} 
-%% . 
-%%
-%% `?GL_TEXTURE_BINDING_2D_ARRAY':  `Params'  returns a single value, the name of
-%% the texture currently bound to the target `?GL_TEXTURE_2D_ARRAY'. The initial value
-%% is 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_BINDING_2D_MULTISAMPLE':  `Params'  returns a single value, the name
-%% of the texture currently bound to the target `?GL_TEXTURE_2D_MULTISAMPLE'. The initial
-%% value is 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY':  `Params'  returns a single value,
-%% the name of the texture currently bound to the target `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY'
-%% . The initial value is 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_BINDING_3D':  `Params'  returns a single value, the name of the texture
-%% currently bound to the target `?GL_TEXTURE_3D'. The initial value is 0. See  {@link gl:bindTexture/2} 
-%% . 
-%%
-%% `?GL_TEXTURE_BINDING_BUFFER':  `Params'  returns a single value, the name of the
-%% texture currently bound to the target `?GL_TEXTURE_BUFFER'. The initial value is
-%% 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_BINDING_CUBE_MAP':  `Params'  returns a single value, the name of
-%% the texture currently bound to the target `?GL_TEXTURE_CUBE_MAP'. The initial value
-%% is 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_BINDING_RECTANGLE':  `Params'  returns a single value, the name of
-%% the texture currently bound to the target `?GL_TEXTURE_RECTANGLE'. The initial value
-%% is 0. See  {@link gl:bindTexture/2} . 
-%%
-%% `?GL_TEXTURE_COMPRESSION_HINT':  `Params'  returns a single value indicating the
-%% mode of the texture compression hint. The initial value is `?GL_DONT_CARE'. 
-%%
-%% `?GL_TEXTURE_BUFFER_BINDING':  `Params'  returns a single value, the name of the
-%% texture buffer object currently bound. The initial value is 0. See  {@link gl:bindBuffer/2} .
-%% 
-%%
-%% `?GL_TIMESTAMP':  `Params'  returns a single value, the 64-bit value of the current
-%% GL time. See  {@link gl:queryCounter/2} . 
-%%
-%% `?GL_TRANSFORM_FEEDBACK_BUFFER_BINDING':  When used with non-indexed variants of ``gl:get''
-%%  (such as ``gl:getIntegerv''),  `Params'  returns a single value, the name of the
-%% buffer object currently bound to the target `?GL_TRANSFORM_FEEDBACK_BUFFER'. If no
-%% buffer object is bound to this target, 0 is returned. When used with indexed variants of ``gl:get''
-%%  (such as ``gl:getIntegeri_v''),  `Params'  returns a single value, the name of the
-%% buffer object bound to the indexed transform feedback attribute stream. The initial value
-%% is 0 for all targets. See  {@link gl:bindBuffer/2} ,  {@link gl:bindBufferBase/3} , and  {@link gl:bindBufferRange/5} 
-%% . 
-%%
-%% `?GL_TRANSFORM_FEEDBACK_BUFFER_START':  When used with indexed variants of ``gl:get''
-%%  (such as ``gl:getInteger64i_v''),  `Params'  returns a single value, the start offset
-%% of the binding range for each transform feedback attribute stream. The initial value is
-%% 0 for all streams. See  {@link gl:bindBufferRange/5} . 
-%%
-%% `?GL_TRANSFORM_FEEDBACK_BUFFER_SIZE':  When used with indexed variants of ``gl:get''
-%%  (such as ``gl:getInteger64i_v''),  `Params'  returns a single value, the size of
-%% the binding range for each transform feedback attribute stream. The initial value is 0
-%% for all streams. See  {@link gl:bindBufferRange/5} . 
-%%
-%% `?GL_UNIFORM_BUFFER_BINDING':  When used with non-indexed variants of ``gl:get''
-%% (such as ``gl:getIntegerv''),  `Params'  returns a single value, the name of the
-%% buffer object currently bound to the target `?GL_UNIFORM_BUFFER'. If no buffer object
-%% is bound to this target, 0 is returned. When used with indexed variants of ``gl:get''
-%% (such as ``gl:getIntegeri_v''),  `Params'  returns a single value, the name of the
-%% buffer object bound to the indexed uniform buffer binding point. The initial value is
-%% 0 for all targets. See  {@link gl:bindBuffer/2} ,  {@link gl:bindBufferBase/3} , and  {@link gl:bindBufferRange/5} 
-%% . 
-%%
-%% `?GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT':  `Params'  returns a single value, the
-%% minimum required alignment for uniform buffer sizes and offset. The initial value is 1.
-%% See  {@link gl:uniformBlockBinding/3} . 
-%%
-%% `?GL_UNIFORM_BUFFER_SIZE':  When used with indexed variants of ``gl:get'' (such
-%% as ``gl:getInteger64i_v''),  `Params'  returns a single value, the size of the binding
-%% range for each indexed uniform buffer binding. The initial value is 0 for all bindings.
-%% See  {@link gl:bindBufferRange/5} . 
-%%
-%% `?GL_UNIFORM_BUFFER_START':  When used with indexed variants of ``gl:get'' (such
-%% as ``gl:getInteger64i_v''),  `Params'  returns a single value, the start offset of
-%% the binding range for each indexed uniform buffer binding. The initial value is 0 for
-%% all bindings. See  {@link gl:bindBufferRange/5} . 
-%%
-%% `?GL_UNPACK_ALIGNMENT':  `Params'  returns one value, the byte alignment used
-%% for reading pixel data from memory. The initial value is 4. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_UNPACK_IMAGE_HEIGHT':  `Params'  returns one value, the image height used
-%% for reading pixel data from memory. The initial is 0. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_UNPACK_LSB_FIRST':  `Params'  returns a single boolean value indicating whether
-%% single-bit pixels being read from memory are read first from the least significant bit
-%% of each unsigned byte. The initial value is `?GL_FALSE'. See  {@link gl:pixelStoref/2} .
-%% 
-%%
-%% `?GL_UNPACK_ROW_LENGTH':  `Params'  returns one value, the row length used for
-%% reading pixel data from memory. The initial value is 0. See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_UNPACK_SKIP_IMAGES':  `Params'  returns one value, the number of pixel images
-%% skipped before the first pixel is read from memory. The initial value is 0. See  {@link gl:pixelStoref/2} 
-%% . 
-%%
-%% `?GL_UNPACK_SKIP_PIXELS':  `Params'  returns one value, the number of pixel locations
-%% skipped before the first pixel is read from memory. The initial value is 0. See  {@link gl:pixelStoref/2} 
-%% . 
-%%
-%% `?GL_UNPACK_SKIP_ROWS':  `Params'  returns one value, the number of rows of pixel
-%% locations skipped before the first pixel is read from memory. The initial value is 0.
-%% See  {@link gl:pixelStoref/2} . 
-%%
-%% `?GL_UNPACK_SWAP_BYTES':  `Params'  returns a single boolean value indicating
-%% whether the bytes of two-byte and four-byte pixel indices and components are swapped after
-%% being read from memory. The initial value is `?GL_FALSE'. See  {@link gl:pixelStoref/2} .
-%% 
-%%
-%% `?GL_VERTEX_PROGRAM_POINT_SIZE':  `Params'  returns a single boolean value indicating
-%% whether vertex program point size mode is enabled. If enabled, and a vertex shader is
-%% active, then the point size is taken from the shader built-in gl_PointSize. If disabled,
-%% and a vertex shader is active, then the point size is taken from the point state as specified
-%% by  {@link gl:pointSize/1} . The initial value is `?GL_FALSE'. 
-%%
-%% `?GL_VIEWPORT':  When used with non-indexed variants of ``gl:get'' (such as ``gl:getIntegerv''
-%% ),  `Params'  returns four values: the   x and   y window coordinates of the viewport,
-%% followed by its width and height. Initially the   x and   y window coordinates are both
-%% set to 0, and the width and height are set to the width and height of the window into
-%% which the GL will do its rendering. See  {@link gl:viewport/4} .  When used with indexed
-%% variants of ``gl:get'' (such as ``gl:getIntegeri_v''),  `Params'  returns four
-%% values: the   x and   y window coordinates of the indexed viewport, followed by its width
-%% and height. Initially the   x and   y window coordinates are both set to 0, and the width
-%% and height are set to the width and height of the window into which the GL will do its
-%% rendering. See  {@link gl:viewportIndexedf/5} . 
-%%
-%% `?GL_VIEWPORT_BOUNDS_RANGE':  `Params'  returns two values, the minimum and maximum
-%% viewport bounds range. The minimum range should be at least [-32768, 32767]. 
-%%
-%% `?GL_VIEWPORT_INDEX_PROVOKING_VERTEX':  `Params'  returns one value, the implementation
-%% dependent specifc vertex of a primitive that is used to select the viewport index.  If
-%% the value returned is equivalent to `?GL_PROVOKING_VERTEX', then the vertex  selection
-%% follows the convention specified by  {@link gl:provokingVertex/1} . If the value returned
-%% is equivalent to `?GL_FIRST_VERTEX_CONVENTION', then the  selection is always taken
-%% from the first vertex in the primitive. If the value returned is equivalent to `?GL_LAST_VERTEX_CONVENTION'
-%% , then the  selection is always taken from the last vertex in the primitive. If the value
-%% returned is equivalent to `?GL_UNDEFINED_VERTEX', then the  selection is not guaranteed
-%% to be taken from any specific vertex in the primitive. 
-%%
-%% `?GL_VIEWPORT_SUBPIXEL_BITS':  `Params'  returns a single value, the number of
-%% bits of sub-pixel precision which the GL  uses to interpret the floating point viewport
-%% bounds. The minimum value is 0. 
-%%
-%%  Many of the boolean parameters can also be queried more easily using  {@link gl:isEnabled/1} 
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGet.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGet.xhtml">external</a> documentation.
 -spec getBooleanv(Pname) -> [0|1] when Pname :: enum().
 getBooleanv(Pname) ->
   call(5065, <<Pname:?GLenum>>).
@@ -1968,131 +698,7 @@ getIntegerv(Pname) ->
 %% together. The special mask `?GL_ALL_ATTRIB_BITS' can be used to save all stackable
 %% states. 
 %%
-%%  The symbolic mask constants and their associated GL state are as follows (the second
-%% column lists which attributes are saved): 
-%%
-%% <table><tbody><tr><td>`?GL_ACCUM_BUFFER_BIT'</td><td> Accumulation buffer clear value
-%% </td></tr><tr><td>`?GL_COLOR_BUFFER_BIT'</td><td>`?GL_ALPHA_TEST' enable bit </td>
-%% </tr><tr><td></td><td> Alpha test function and reference value </td></tr><tr><td></td><td>
-%% `?GL_BLEND' enable bit </td></tr><tr><td></td><td> Blending source and destination
-%% functions </td></tr><tr><td></td><td> Constant blend color </td></tr><tr><td></td><td>
-%% Blending equation </td></tr><tr><td></td><td>`?GL_DITHER' enable bit </td></tr><tr><td>
-%% </td><td>`?GL_DRAW_BUFFER' setting </td></tr><tr><td></td><td>`?GL_COLOR_LOGIC_OP'
-%%  enable bit </td></tr><tr><td></td><td>`?GL_INDEX_LOGIC_OP' enable bit </td></tr><tr>
-%% <td></td><td> Logic op function </td></tr><tr><td></td><td> Color mode and index mode
-%% clear values </td></tr><tr><td></td><td> Color mode and index mode writemasks </td></tr><tr>
-%% <td>`?GL_CURRENT_BIT'</td><td> Current RGBA color </td></tr><tr><td></td><td> Current
-%% color index </td></tr><tr><td></td><td> Current normal vector </td></tr><tr><td></td><td>
-%% Current texture coordinates </td></tr><tr><td></td><td> Current raster position </td></tr>
-%% <tr><td></td><td>`?GL_CURRENT_RASTER_POSITION_VALID' flag </td></tr><tr><td></td><td>
-%%  RGBA color associated with current raster position </td></tr><tr><td></td><td> Color
-%% index associated with current raster position </td></tr><tr><td></td><td> Texture coordinates
-%% associated with current raster position </td></tr><tr><td></td><td>`?GL_EDGE_FLAG'
-%% flag </td></tr><tr><td>`?GL_DEPTH_BUFFER_BIT'</td><td>`?GL_DEPTH_TEST' enable
-%% bit </td></tr><tr><td></td><td> Depth buffer test function </td></tr><tr><td></td><td>
-%% Depth buffer clear value </td></tr><tr><td></td><td>`?GL_DEPTH_WRITEMASK' enable
-%% bit </td></tr><tr><td>`?GL_ENABLE_BIT'</td><td>`?GL_ALPHA_TEST' flag </td></tr><tr>
-%% <td></td><td>`?GL_AUTO_NORMAL' flag </td></tr><tr><td></td><td>`?GL_BLEND' flag
-%% </td></tr><tr><td></td><td> Enable bits for the user-definable clipping planes </td></tr><tr>
-%% <td></td><td>`?GL_COLOR_MATERIAL'</td></tr><tr><td></td><td>`?GL_CULL_FACE'
-%% flag </td></tr><tr><td></td><td>`?GL_DEPTH_TEST' flag </td></tr><tr><td></td><td>`?GL_DITHER'
-%%  flag </td></tr><tr><td></td><td>`?GL_FOG' flag </td></tr><tr><td></td><td>`?GL_LIGHT'
-%% `i'    where     `?0' &lt;=       `i' &lt;     `?GL_MAX_LIGHTS'</td></tr>
-%% <tr><td></td><td>`?GL_LIGHTING' flag </td></tr><tr><td></td><td>`?GL_LINE_SMOOTH'
-%%  flag </td></tr><tr><td></td><td>`?GL_LINE_STIPPLE' flag </td></tr><tr><td></td><td>`?GL_COLOR_LOGIC_OP'
-%%  flag </td></tr><tr><td></td><td>`?GL_INDEX_LOGIC_OP' flag </td></tr><tr><td></td><td>
-%% `?GL_MAP1_'`x' where `x' is a map type </td></tr><tr><td></td><td>`?GL_MAP2_'
-%% `x' where `x' is a map type </td></tr><tr><td></td><td>`?GL_MULTISAMPLE'
-%% flag </td></tr><tr><td></td><td>`?GL_NORMALIZE' flag </td></tr><tr><td></td><td>`?GL_POINT_SMOOTH'
-%%  flag </td></tr><tr><td></td><td>`?GL_POLYGON_OFFSET_LINE' flag </td></tr><tr><td></td>
-%% <td>`?GL_POLYGON_OFFSET_FILL' flag </td></tr><tr><td></td><td>`?GL_POLYGON_OFFSET_POINT'
-%%  flag </td></tr><tr><td></td><td>`?GL_POLYGON_SMOOTH' flag </td></tr><tr><td></td><td>
-%% `?GL_POLYGON_STIPPLE' flag </td></tr><tr><td></td><td>`?GL_SAMPLE_ALPHA_TO_COVERAGE'
-%%  flag </td></tr><tr><td></td><td>`?GL_SAMPLE_ALPHA_TO_ONE' flag </td></tr><tr><td></td>
-%% <td>`?GL_SAMPLE_COVERAGE' flag </td></tr><tr><td></td><td>`?GL_SCISSOR_TEST'
-%% flag </td></tr><tr><td></td><td>`?GL_STENCIL_TEST' flag </td></tr><tr><td></td><td>`?GL_TEXTURE_1D'
-%%  flag </td></tr><tr><td></td><td>`?GL_TEXTURE_2D' flag </td></tr><tr><td></td><td>`?GL_TEXTURE_3D'
-%%  flag </td></tr><tr><td></td><td> Flags `?GL_TEXTURE_GEN_'`x' where `x'
-%% is S, T, R, or Q </td></tr><tr><td>`?GL_EVAL_BIT'</td><td>`?GL_MAP1_'`x'
-%% enable bits, where `x' is a map type </td></tr><tr><td></td><td>`?GL_MAP2_'`x'
-%%  enable bits, where `x' is a map type </td></tr><tr><td></td><td> 1D grid endpoints
-%% and divisions </td></tr><tr><td></td><td> 2D grid endpoints and divisions </td></tr><tr><td>
-%% </td><td>`?GL_AUTO_NORMAL' enable bit </td></tr><tr><td>`?GL_FOG_BIT'</td><td>`?GL_FOG'
-%%  enable bit </td></tr><tr><td></td><td> Fog color </td></tr><tr><td></td><td> Fog density
-%% </td></tr><tr><td></td><td> Linear fog start </td></tr><tr><td></td><td> Linear fog end </td>
-%% </tr><tr><td></td><td> Fog index </td></tr><tr><td></td><td>`?GL_FOG_MODE' value </td>
-%% </tr><tr><td>`?GL_HINT_BIT'</td><td>`?GL_PERSPECTIVE_CORRECTION_HINT' setting </td>
-%% </tr><tr><td></td><td>`?GL_POINT_SMOOTH_HINT' setting </td></tr><tr><td></td><td>`?GL_LINE_SMOOTH_HINT'
-%%  setting </td></tr><tr><td></td><td>`?GL_POLYGON_SMOOTH_HINT' setting </td></tr><tr><td>
-%% </td><td>`?GL_FOG_HINT' setting </td></tr><tr><td></td><td>`?GL_GENERATE_MIPMAP_HINT'
-%%  setting </td></tr><tr><td></td><td>`?GL_TEXTURE_COMPRESSION_HINT' setting </td></tr>
-%% <tr><td>`?GL_LIGHTING_BIT'</td><td>`?GL_COLOR_MATERIAL' enable bit </td></tr><tr>
-%% <td></td><td>`?GL_COLOR_MATERIAL_FACE' value </td></tr><tr><td></td><td> Color material
-%% parameters that are tracking the current color </td></tr><tr><td></td><td> Ambient scene
-%% color </td></tr><tr><td></td><td>`?GL_LIGHT_MODEL_LOCAL_VIEWER' value </td></tr><tr><td>
-%% </td><td>`?GL_LIGHT_MODEL_TWO_SIDE' setting </td></tr><tr><td></td><td>`?GL_LIGHTING'
-%%  enable bit </td></tr><tr><td></td><td> Enable bit for each light </td></tr><tr><td></td><td>
-%%  Ambient, diffuse, and specular intensity for each light </td></tr><tr><td></td><td> Direction,
-%% position, exponent, and cutoff angle for each light </td></tr><tr><td></td><td> Constant,
-%% linear, and quadratic attenuation factors for each light </td></tr><tr><td></td><td> Ambient,
-%% diffuse, specular, and emissive color for each material </td></tr><tr><td></td><td> Ambient,
-%% diffuse, and specular color indices for each material </td></tr><tr><td></td><td> Specular
-%% exponent for each material </td></tr><tr><td></td><td>`?GL_SHADE_MODEL' setting </td>
-%% </tr><tr><td>`?GL_LINE_BIT'</td><td>`?GL_LINE_SMOOTH' flag </td></tr><tr><td></td>
-%% <td>`?GL_LINE_STIPPLE' enable bit </td></tr><tr><td></td><td> Line stipple pattern
-%% and repeat counter </td></tr><tr><td></td><td> Line width </td></tr><tr><td>`?GL_LIST_BIT'
-%% </td><td>`?GL_LIST_BASE' setting </td></tr><tr><td>`?GL_MULTISAMPLE_BIT'</td><td>
-%% `?GL_MULTISAMPLE' flag </td></tr><tr><td></td><td>`?GL_SAMPLE_ALPHA_TO_COVERAGE'
-%% flag </td></tr><tr><td></td><td>`?GL_SAMPLE_ALPHA_TO_ONE' flag </td></tr><tr><td></td>
-%% <td>`?GL_SAMPLE_COVERAGE' flag </td></tr><tr><td></td><td>`?GL_SAMPLE_COVERAGE_VALUE'
-%%  value </td></tr><tr><td></td><td>`?GL_SAMPLE_COVERAGE_INVERT' value </td></tr><tr><td>
-%% `?GL_PIXEL_MODE_BIT'</td><td>`?GL_RED_BIAS' and `?GL_RED_SCALE' settings </td>
-%% </tr><tr><td></td><td>`?GL_GREEN_BIAS' and `?GL_GREEN_SCALE' values </td></tr><tr>
-%% <td></td><td>`?GL_BLUE_BIAS' and `?GL_BLUE_SCALE'</td></tr><tr><td></td><td>`?GL_ALPHA_BIAS'
-%%  and `?GL_ALPHA_SCALE'</td></tr><tr><td></td><td>`?GL_DEPTH_BIAS' and `?GL_DEPTH_SCALE'
-%% </td></tr><tr><td></td><td>`?GL_INDEX_OFFSET' and `?GL_INDEX_SHIFT' values </td>
-%% </tr><tr><td></td><td>`?GL_MAP_COLOR' and `?GL_MAP_STENCIL' flags </td></tr><tr>
-%% <td></td><td>`?GL_ZOOM_X' and `?GL_ZOOM_Y' factors </td></tr><tr><td></td><td>`?GL_READ_BUFFER'
-%%  setting </td></tr><tr><td>`?GL_POINT_BIT'</td><td>`?GL_POINT_SMOOTH' flag </td>
-%% </tr><tr><td></td><td> Point size </td></tr><tr><td>`?GL_POLYGON_BIT'</td><td>`?GL_CULL_FACE'
-%%  enable bit </td></tr><tr><td></td><td>`?GL_CULL_FACE_MODE' value </td></tr><tr><td></td>
-%% <td>`?GL_FRONT_FACE' indicator </td></tr><tr><td></td><td>`?GL_POLYGON_MODE'
-%% setting </td></tr><tr><td></td><td>`?GL_POLYGON_SMOOTH' flag </td></tr><tr><td></td><td>
-%% `?GL_POLYGON_STIPPLE' enable bit </td></tr><tr><td></td><td>`?GL_POLYGON_OFFSET_FILL'
-%%  flag </td></tr><tr><td></td><td>`?GL_POLYGON_OFFSET_LINE' flag </td></tr><tr><td></td>
-%% <td>`?GL_POLYGON_OFFSET_POINT' flag </td></tr><tr><td></td><td>`?GL_POLYGON_OFFSET_FACTOR'
-%% </td></tr><tr><td></td><td>`?GL_POLYGON_OFFSET_UNITS'</td></tr><tr><td>`?GL_POLYGON_STIPPLE_BIT'
-%% </td><td> Polygon stipple image </td></tr><tr><td>`?GL_SCISSOR_BIT'</td><td>`?GL_SCISSOR_TEST'
-%%  flag </td></tr><tr><td></td><td> Scissor box </td></tr><tr><td>`?GL_STENCIL_BUFFER_BIT'
-%% </td><td>`?GL_STENCIL_TEST' enable bit </td></tr><tr><td></td><td> Stencil function
-%% and reference value </td></tr><tr><td></td><td> Stencil value mask </td></tr><tr><td></td>
-%% <td> Stencil fail, pass, and depth buffer pass actions </td></tr><tr><td></td><td> Stencil
-%% buffer clear value </td></tr><tr><td></td><td> Stencil buffer writemask </td></tr><tr><td>
-%% `?GL_TEXTURE_BIT'</td><td> Enable bits for the four texture coordinates </td></tr><tr>
-%% <td></td><td> Border color for each texture image </td></tr><tr><td></td><td> Minification
-%% function for each texture image </td></tr><tr><td></td><td> Magnification function for
-%% each texture image </td></tr><tr><td></td><td> Texture coordinates and wrap mode for each
-%% texture image </td></tr><tr><td></td><td> Color and mode for each texture environment </td>
-%% </tr><tr><td></td><td> Enable bits `?GL_TEXTURE_GEN_'`x', `x' is S, T,
-%% R, and Q </td></tr><tr><td></td><td>`?GL_TEXTURE_GEN_MODE' setting for S, T, R, and
-%% Q </td></tr><tr><td></td><td> {@link gl:texGend/3}  plane equations for S, T, R, and Q </td></tr>
-%% <tr><td></td><td> Current texture bindings (for example, `?GL_TEXTURE_BINDING_2D') </td>
-%% </tr><tr><td>`?GL_TRANSFORM_BIT'</td><td> Coefficients of the six clipping planes </td>
-%% </tr><tr><td></td><td> Enable bits for the user-definable clipping planes </td></tr><tr><td>
-%% </td><td>`?GL_MATRIX_MODE' value </td></tr><tr><td></td><td>`?GL_NORMALIZE'
-%% flag </td></tr><tr><td></td><td>`?GL_RESCALE_NORMAL' flag </td></tr><tr><td>`?GL_VIEWPORT_BIT'
-%% </td><td> Depth range (near and far) </td></tr><tr><td></td><td> Viewport origin and extent
-%% </td></tr></tbody></table>
-%%
-%%  {@link gl:pushAttrib/1}  restores the values of the state variables saved with the last ``gl:pushAttrib''
-%%  command. Those not saved are left unchanged. 
-%%
-%%  It is an error to push attributes onto a full stack or to pop attributes off an empty
-%% stack. In either case, the error flag is set and no other change is made to GL state. 
-%%
-%%  Initially, the attribute stack is empty. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPushAttrib.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPushAttrib.xml">external</a> documentation.
 -spec pushAttrib(Mask) -> 'ok' when Mask :: integer().
 pushAttrib(Mask) ->
   cast(5069, <<Mask:?GLbitfield>>).
@@ -2111,22 +717,7 @@ popAttrib() ->
 %%   of these constants together. The special mask `?GL_CLIENT_ALL_ATTRIB_BITS' can
 %% be used to save all stackable client state. 
 %%
-%%  The symbolic mask constants and their associated GL client state are as follows (the
-%% second column lists which attributes are saved): 
-%%
-%% `?GL_CLIENT_PIXEL_STORE_BIT' Pixel storage modes `?GL_CLIENT_VERTEX_ARRAY_BIT'
-%% Vertex arrays (and enables) 
-%%
-%%  {@link gl:pushClientAttrib/1}  restores the values of the client-state variables saved with
-%% the last ``gl:pushClientAttrib''. Those not saved are left unchanged. 
-%%
-%%  It is an error to push attributes onto a full client attribute stack or to pop attributes
-%% off an empty stack. In either case, the error flag is set, and no other change is made
-%% to GL state. 
-%%
-%%  Initially, the client attribute stack is empty. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPushClientAttrib.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPushClientAttrib.xml">external</a> documentation.
 -spec pushClientAttrib(Mask) -> 'ok' when Mask :: integer().
 pushClientAttrib(Mask) ->
   cast(5071, <<Mask:?GLbitfield>>).
@@ -2142,37 +733,7 @@ popClientAttrib() ->
 %% ``gl:renderMode'' sets the rasterization mode. It takes one argument,  `Mode' , which
 %% can assume one of three predefined values: 
 %%
-%% `?GL_RENDER':  Render mode. Primitives are rasterized, producing pixel fragments,
-%% which are written into the frame buffer. This is the normal mode and also the default
-%% mode. 
-%%
-%% `?GL_SELECT':  Selection mode. No pixel fragments are produced, and no change to
-%% the frame buffer contents is made. Instead, a record of the names of primitives that would
-%% have been drawn if the render mode had been `?GL_RENDER' is returned in a select
-%% buffer, which must be created (see  {@link gl:selectBuffer/2} ) before selection mode is
-%% entered. 
-%%
-%% `?GL_FEEDBACK':  Feedback mode. No pixel fragments are produced, and no change to
-%% the frame buffer contents is made. Instead, the coordinates and attributes of vertices
-%% that would have been drawn if the render mode had been `?GL_RENDER' is returned in
-%% a feedback buffer, which must be created (see  {@link gl:feedbackBuffer/3} ) before feedback
-%% mode is entered. 
-%%
-%%  The return value of ``gl:renderMode'' is determined by the render mode at the time ``gl:renderMode''
-%%  is called, rather than by  `Mode' . The values returned for the three render modes
-%% are as follows: 
-%%
-%% `?GL_RENDER':  0. 
-%%
-%% `?GL_SELECT':  The number of hit records transferred to the select buffer. 
-%%
-%% `?GL_FEEDBACK':  The number of values (not vertices) transferred to the feedback
-%% buffer. 
-%%
-%%  See the  {@link gl:selectBuffer/2}  and  {@link gl:feedbackBuffer/3}  reference pages for more
-%% details concerning selection and feedback operation. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glRenderMode.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glRenderMode.xml">external</a> documentation.
 -spec renderMode(Mode) -> integer() when Mode :: enum().
 renderMode(Mode) ->
   call(5073, <<Mode:?GLenum>>).
@@ -2186,44 +747,7 @@ renderMode(Mode) ->
 %%  returns `?GL_NO_ERROR', there has been no detectable error since the last call to ``gl:getError''
 %% , or since the GL was initialized. 
 %%
-%%  To allow for distributed implementations, there may be several error flags. If any single
-%% error flag has recorded an error, the value of that flag is returned and that flag is
-%% reset to `?GL_NO_ERROR' when ``gl:getError'' is called. If more than one flag has
-%% recorded an error, ``gl:getError'' returns and clears an arbitrary error flag value.
-%% Thus, ``gl:getError'' should always be called in a loop, until it returns `?GL_NO_ERROR'
-%% , if all error flags are to be reset. 
-%%
-%%  Initially, all error flags are set to `?GL_NO_ERROR'. 
-%%
-%%  The following errors are currently defined: 
-%%
-%% `?GL_NO_ERROR':  No error has been recorded. The value of this symbolic constant
-%% is guaranteed to be 0. 
-%%
-%% `?GL_INVALID_ENUM':  An unacceptable value is specified for an enumerated argument.
-%% The offending command is ignored and has no other side effect than to set the error flag.
-%% 
-%%
-%% `?GL_INVALID_VALUE':  A numeric argument is out of range. The offending command is
-%% ignored and has no other side effect than to set the error flag. 
-%%
-%% `?GL_INVALID_OPERATION':  The specified operation is not allowed in the current state.
-%% The offending command is ignored and has no other side effect than to set the error flag.
-%% 
-%%
-%% `?GL_INVALID_FRAMEBUFFER_OPERATION':  The framebuffer object is not complete. The
-%% offending command is ignored and has no other side effect than to set the error flag. 
-%%
-%% `?GL_OUT_OF_MEMORY':  There is not enough memory left to execute the command. The
-%% state of the GL is undefined, except for the state of the error flags, after this error
-%% is recorded. 
-%%
-%%  When an error flag is set, results of a GL operation are undefined only if `?GL_OUT_OF_MEMORY'
-%%  has occurred. In all other cases, the command generating the error is ignored and has
-%% no effect on the GL state or frame buffer contents. If the generating command returns
-%% a value, it returns 0. If ``gl:getError'' itself generates an error, it returns 0. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetError.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetError.xhtml">external</a> documentation.
 -spec getError() -> enum().
 getError() ->
   call(5074, <<>>).
@@ -2233,40 +757,7 @@ getError() ->
 %% ``gl:getString'' returns a pointer to a static string describing some aspect of the
 %% current GL connection.  `Name'  can be one of the following: 
 %%
-%% `?GL_VENDOR':  Returns the company responsible for this GL implementation. This name
-%% does not change from release to release. 
-%%
-%% `?GL_RENDERER':  Returns the name of the renderer. This name is typically specific
-%% to a particular configuration of a hardware platform. It does not change from release
-%% to release. 
-%%
-%% `?GL_VERSION':  Returns a version or release number. 
-%%
-%% `?GL_SHADING_LANGUAGE_VERSION':  Returns a version or release number for the shading
-%% language. 
-%%
-%% ``gl:getStringi'' returns a pointer to a static string indexed by  `Index' .  `Name' 
-%%  can be one of the following: 
-%%
-%% `?GL_EXTENSIONS':  For ``gl:getStringi'' only, returns the extension string supported
-%% by the implementation at  `Index' . 
-%%
-%%  Strings `?GL_VENDOR' and `?GL_RENDERER' together uniquely specify a platform.
-%% They do not change from release to release and should be used by platform-recognition
-%% algorithms. 
-%%
-%%  The `?GL_VERSION' and `?GL_SHADING_LANGUAGE_VERSION' strings begin with a version
-%% number. The version number uses one of these forms: 
-%%
-%% `major_number.minor_number'`major_number.minor_number.release_number'
-%%
-%%  Vendor-specific information may follow the version number. Its format depends on the
-%% implementation, but a space always separates the version number and the vendor-specific
-%% information. 
-%%
-%%  All strings are null-terminated. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetString.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetString.xhtml">external</a> documentation.
 -spec getString(Name) -> string() when Name :: enum().
 getString(Name) ->
   call(5075, <<Name:?GLenum>>).
@@ -2277,7 +768,7 @@ getString(Name) ->
 %% are complete. Such effects include all changes to GL state, all changes to connection
 %% state, and all changes to the frame buffer contents. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFinish.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFinish.xhtml">external</a> documentation.
 -spec finish() -> 'ok'.
 finish() ->
   cast(5076, <<>>).
@@ -2290,12 +781,7 @@ finish() ->
 %% the actual rendering engine. Though this execution may not be completed in any particular
 %% time period, it does complete in finite time. 
 %%
-%%  Because any GL program might be executed over a network, or on an accelerator that buffers
-%% commands, all programs should call ``gl:flush'' whenever they count on having all of
-%% their previously issued commands completed. For example, call ``gl:flush'' before waiting
-%% for user input that depends on the generated image. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFlush.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFlush.xhtml">external</a> documentation.
 -spec flush() -> 'ok'.
 flush() ->
   cast(5077, <<>>).
@@ -2308,36 +794,7 @@ flush() ->
 %% indicating the desired behavior. The initial value for each  `Target'  is `?GL_DONT_CARE'
 %% .  `Mode'  can be one of the following: 
 %%
-%% `?GL_FASTEST':  The most efficient option should be chosen. 
-%%
-%% `?GL_NICEST':  The most correct, or highest quality, option should be chosen. 
-%%
-%% `?GL_DONT_CARE':  No preference. 
-%%
-%%  Though the implementation aspects that can be hinted are well defined, the interpretation
-%% of the hints depends on the implementation. The hint aspects that can be specified with  `Target' 
-%% , along with suggested semantics, are as follows: 
-%%
-%% `?GL_FRAGMENT_SHADER_DERIVATIVE_HINT':  Indicates the accuracy of the derivative
-%% calculation for the GL shading language fragment processing built-in functions: `?dFdx'
-%% , `?dFdy', and `?fwidth'. 
-%%
-%% `?GL_LINE_SMOOTH_HINT':  Indicates the sampling quality of antialiased lines. If
-%% a larger filter function is applied, hinting `?GL_NICEST' can result in more pixel
-%% fragments being generated during rasterization. 
-%%
-%% `?GL_POLYGON_SMOOTH_HINT':  Indicates the sampling quality of antialiased polygons.
-%% Hinting `?GL_NICEST' can result in more pixel fragments being generated during rasterization,
-%% if a larger filter function is applied. 
-%%
-%% `?GL_TEXTURE_COMPRESSION_HINT':  Indicates the quality and performance of the compressing
-%% texture images. Hinting `?GL_FASTEST' indicates that texture images should be compressed
-%% as quickly as possible, while `?GL_NICEST' indicates that texture images should be
-%% compressed with as little image quality loss as possible. `?GL_NICEST' should be
-%% selected if the texture is to be retrieved by  {@link gl:getCompressedTexImage/3}  for reuse.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glHint.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glHint.xhtml">external</a> documentation.
 -spec hint(Target, Mode) -> 'ok' when Target :: enum(),Mode :: enum().
 hint(Target,Mode) ->
   cast(5078, <<Target:?GLenum,Mode:?GLenum>>).
@@ -2347,7 +804,7 @@ hint(Target,Mode) ->
 %% ``gl:clearDepth'' specifies the depth value used by  {@link gl:clear/1}  to clear the depth
 %% buffer. Values specified by ``gl:clearDepth'' are clamped to the range  [0 1]. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearDepth.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClearDepth.xhtml">external</a> documentation.
 -spec clearDepth(Depth) -> 'ok' when Depth :: clamp().
 clearDepth(Depth) ->
   cast(5079, <<Depth:?GLclampd>>).
@@ -2359,36 +816,7 @@ clearDepth(Depth) ->
 %% depth testing is enabled. (See  {@link gl:enable/1}  and  {@link gl:enable/1}  of `?GL_DEPTH_TEST'
 %% .) 
 %%
-%%  `Func'  specifies the conditions under which the pixel will be drawn. The comparison
-%% functions are as follows: 
-%%
-%% `?GL_NEVER':  Never passes. 
-%%
-%% `?GL_LESS':  Passes if the incoming depth value is less than the stored depth value.
-%% 
-%%
-%% `?GL_EQUAL':  Passes if the incoming depth value is equal to the stored depth value.
-%% 
-%%
-%% `?GL_LEQUAL':  Passes if the incoming depth value is less than or equal to the stored
-%% depth value. 
-%%
-%% `?GL_GREATER':  Passes if the incoming depth value is greater than the stored depth
-%% value. 
-%%
-%% `?GL_NOTEQUAL':  Passes if the incoming depth value is not equal to the stored depth
-%% value. 
-%%
-%% `?GL_GEQUAL':  Passes if the incoming depth value is greater than or equal to the
-%% stored depth value. 
-%%
-%% `?GL_ALWAYS':  Always passes. 
-%%
-%%  The initial value of  `Func'  is `?GL_LESS'. Initially, depth testing is disabled.
-%% If depth testing is disabled or if no depth buffer exists, it is as if the depth test
-%% always passes. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDepthFunc.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDepthFunc.xhtml">external</a> documentation.
 -spec depthFunc(Func) -> 'ok' when Func :: enum().
 depthFunc(Func) ->
   cast(5080, <<Func:?GLenum>>).
@@ -2399,7 +827,7 @@ depthFunc(Func) ->
 %%  is `?GL_FALSE', depth buffer writing is disabled. Otherwise, it is enabled. Initially,
 %% depth buffer writing is enabled. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDepthMask.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDepthMask.xhtml">external</a> documentation.
 -spec depthMask(Flag) -> 'ok' when Flag :: 0|1.
 depthMask(Flag) ->
   cast(5081, <<Flag:?GLboolean>>).
@@ -2413,10 +841,7 @@ depthMask(Flag) ->
 %% as though they range from 0 through 1 (like color components). Thus, the values accepted
 %% by ``gl:depthRange'' are both clamped to this range before they are accepted. 
 %%
-%%  The setting of (0,1) maps the near plane to 0 and the far plane to 1. With this mapping,
-%% the depth buffer range is fully utilized. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDepthRange.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDepthRange.xhtml">external</a> documentation.
 -spec depthRange(Near_val, Far_val) -> 'ok' when Near_val :: clamp(),Far_val :: clamp().
 depthRange(Near_val,Far_val) ->
   cast(5082, <<Near_val:?GLclampd,Far_val:?GLclampd>>).
@@ -2426,9 +851,7 @@ depthRange(Near_val,Far_val) ->
 %% ``gl:clearAccum'' specifies the red, green, blue, and alpha values used by  {@link gl:clear/1} 
 %%  to clear the accumulation buffer. 
 %%
-%%  Values specified by ``gl:clearAccum'' are clamped to the range  [-1 1]. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearAccum.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glClearAccum.xml">external</a> documentation.
 -spec clearAccum(Red, Green, Blue, Alpha) -> 'ok' when Red :: float(),Green :: float(),Blue :: float(),Alpha :: float().
 clearAccum(Red,Green,Blue,Alpha) ->
   cast(5083, <<Red:?GLfloat,Green:?GLfloat,Blue:?GLfloat,Alpha:?GLfloat>>).
@@ -2441,53 +864,7 @@ clearAccum(Red,Green,Blue,Alpha) ->
 %% and polygons), motion blur, and depth of field can be created by accumulating images generated
 %% with different transformation matrices. 
 %%
-%%  Each pixel in the accumulation buffer consists of red, green, blue, and alpha values.
-%% The number of bits per component in the accumulation buffer depends on the implementation.
-%% You can examine this number by calling  {@link gl:getBooleanv/1}  four times, with arguments
-%% `?GL_ACCUM_RED_BITS', `?GL_ACCUM_GREEN_BITS', `?GL_ACCUM_BLUE_BITS', and `?GL_ACCUM_ALPHA_BITS'
-%% . Regardless of the number of bits per component, the range of values stored by each component
-%% is  [-1 1]. The accumulation buffer pixels are mapped one-to-one with frame buffer pixels. 
-%%
-%% ``gl:accum'' operates on the accumulation buffer. The first argument,  `Op' , is
-%% a symbolic constant that selects an accumulation buffer operation. The second argument,  `Value' 
-%% , is a floating-point value to be used in that operation. Five operations are specified: `?GL_ACCUM'
-%% , `?GL_LOAD', `?GL_ADD', `?GL_MULT', and `?GL_RETURN'. 
-%%
-%%  All accumulation buffer operations are limited to the area of the current scissor box
-%% and applied identically to the red, green, blue, and alpha components of each pixel. If
-%% a ``gl:accum'' operation results in a value outside the range  [-1 1], the contents of an
-%% accumulation buffer pixel component are undefined. 
-%%
-%%  The operations are as follows: 
-%%
-%% `?GL_ACCUM':  Obtains R, G, B, and A values from the buffer currently selected for
-%% reading (see  {@link gl:readBuffer/1} ). Each component value is divided by   2 n-1, where  
-%% n is the number of bits allocated to each color component in the currently selected buffer.
-%% The result is a floating-point value in the range  [0 1], which is multiplied by  `Value' 
-%% and added to the corresponding pixel component in the accumulation buffer, thereby updating
-%% the accumulation buffer. 
-%%
-%% `?GL_LOAD':  Similar to `?GL_ACCUM', except that the current value in the accumulation
-%% buffer is not used in the calculation of the new value. That is, the R, G, B, and A values
-%% from the currently selected buffer are divided by   2 n-1, multiplied by  `Value' ,
-%% and then stored in the corresponding accumulation buffer cell, overwriting the current
-%% value. 
-%%
-%% `?GL_ADD':  Adds  `Value'  to each R, G, B, and A in the accumulation buffer. 
-%%
-%% `?GL_MULT':  Multiplies each R, G, B, and A in the accumulation buffer by  `Value' 
-%%  and returns the scaled component to its corresponding accumulation buffer location. 
-%%
-%% `?GL_RETURN':  Transfers accumulation buffer values to the color buffer or buffers
-%% currently selected for writing. Each R, G, B, and A component is multiplied by  `Value' 
-%% , then multiplied by   2 n-1, clamped to the range  [0 2 n-1], and stored in the corresponding
-%% display buffer cell. The only fragment operations that are applied to this transfer are
-%% pixel ownership, scissor, dithering, and color writemasks. 
-%%
-%%  To clear the accumulation buffer, call  {@link gl:clearAccum/4}  with R, G, B, and A values
-%% to set it to, then call  {@link gl:clear/1}  with the accumulation buffer enabled. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glAccum.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glAccum.xml">external</a> documentation.
 -spec accum(Op, Value) -> 'ok' when Op :: enum(),Value :: float().
 accum(Op,Value) ->
   cast(5084, <<Op:?GLenum,Value:?GLfloat>>).
@@ -2497,20 +874,7 @@ accum(Op,Value) ->
 %% ``gl:matrixMode'' sets the current matrix mode.  `Mode'  can assume one of four values:
 %% 
 %%
-%% `?GL_MODELVIEW':  Applies subsequent matrix operations to the modelview matrix stack.
-%% 
-%%
-%% `?GL_PROJECTION':  Applies subsequent matrix operations to the projection matrix
-%% stack. 
-%%
-%% `?GL_TEXTURE':  Applies subsequent matrix operations to the texture matrix stack. 
-%%
-%% `?GL_COLOR':  Applies subsequent matrix operations to the color matrix stack. 
-%%
-%%  To find out which matrix stack is currently the target of all matrix operations, call  {@link gl:getBooleanv/1} 
-%%  with argument `?GL_MATRIX_MODE'. The initial value is `?GL_MODELVIEW'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMatrixMode.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMatrixMode.xml">external</a> documentation.
 -spec matrixMode(Mode) -> 'ok' when Mode :: enum().
 matrixMode(Mode) ->
   cast(5085, <<Mode:?GLenum>>).
@@ -2522,20 +886,7 @@ matrixMode(Mode) ->
 %% the current matrix, as if  {@link gl:multMatrixd/1}  were called with the following matrix
 %% as its argument: 
 %%
-%% ((2/(right-left)) 0 0(t x) 0(2/(top-bottom)) 0(t y) 0 0(-2/(farVal-nearVal))(t z) 0 0 0 1)
-%%
-%%  where  t x=-((right+left)/(right-left)) t y=-((top+bottom)/(top-bottom)) t z=-((farVal+nearVal)/(farVal-nearVal))
-%%
-%%  Typically, the matrix mode is `?GL_PROJECTION', and (left bottom-nearVal) and  (right top-nearVal) specify the points on
-%% the near clipping plane that are mapped to the lower left and upper right corners of the
-%% window, respectively, assuming that the eye is located at (0, 0, 0). -farVal specifies
-%% the location of the far clipping plane. Both  `NearVal'  and  `FarVal'  can be either
-%% positive or negative. 
-%%
-%%  Use  {@link gl:pushMatrix/0}  and  {@link gl:pushMatrix/0}  to save and restore the current
-%% matrix stack. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glOrtho.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glOrtho.xml">external</a> documentation.
 -spec ortho(Left, Right, Bottom, Top, Near_val, Far_val) -> 'ok' when Left :: float(),Right :: float(),Bottom :: float(),Top :: float(),Near_val :: float(),Far_val :: float().
 ortho(Left,Right,Bottom,Top,Near_val,Far_val) ->
   cast(5086, <<Left:?GLdouble,Right:?GLdouble,Bottom:?GLdouble,Top:?GLdouble,Near_val:?GLdouble,Far_val:?GLdouble>>).
@@ -2547,25 +898,7 @@ ortho(Left,Right,Bottom,Top,Near_val,Far_val) ->
 %% replaces the current matrix, as if  {@link gl:multMatrixd/1}  were called with the following
 %% matrix as its argument: 
 %%
-%% [((2  nearVal)/(right-left)) 0 A 0 0((2  nearVal)/(top-bottom)) B 0 0 0 C D 0 0 -1 0]
-%%
-%%  A=(right+left)/(right-left)
-%%
-%%  B=(top+bottom)/(top-bottom)
-%%
-%%  C=-((farVal+nearVal)/(farVal-nearVal))
-%%
-%%  D=-((2  farVal  nearVal)/(farVal-nearVal))
-%%
-%%  Typically, the matrix mode is `?GL_PROJECTION', and (left bottom-nearVal) and  (right top-nearVal) specify the points on
-%% the near clipping plane that are mapped to the lower left and upper right corners of the
-%% window, assuming that the eye is located at (0, 0, 0). -farVal specifies the location
-%% of the far clipping plane. Both  `NearVal'  and  `FarVal'  must be positive. 
-%%
-%%  Use  {@link gl:pushMatrix/0}  and  {@link gl:pushMatrix/0}  to save and restore the current
-%% matrix stack. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFrustum.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFrustum.xml">external</a> documentation.
 -spec frustum(Left, Right, Bottom, Top, Near_val, Far_val) -> 'ok' when Left :: float(),Right :: float(),Bottom :: float(),Top :: float(),Near_val :: float(),Far_val :: float().
 frustum(Left,Right,Bottom,Top,Near_val,Far_val) ->
   cast(5087, <<Left:?GLdouble,Right:?GLdouble,Bottom:?GLdouble,Top:?GLdouble,Near_val:?GLdouble,Far_val:?GLdouble>>).
@@ -2576,14 +909,7 @@ frustum(Left,Right,Bottom,Top,Near_val,Far_val) ->
 %% coordinates to window coordinates. Let  (x nd y nd) be normalized device coordinates. Then the window
 %% coordinates  (x w y w) are computed as follows: 
 %%
-%%  x w=(x nd+1) (width/2)+x
-%%
-%%  y w=(y nd+1) (height/2)+y
-%%
-%%  Viewport width and height are silently clamped to a range that depends on the implementation.
-%% To query this range, call  {@link gl:getBooleanv/1}  with argument `?GL_MAX_VIEWPORT_DIMS'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glViewport.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glViewport.xhtml">external</a> documentation.
 -spec viewport(X, Y, Width, Height) -> 'ok' when X :: integer(),Y :: integer(),Width :: integer(),Height :: integer().
 viewport(X,Y,Width,Height) ->
   cast(5088, <<X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei>>).
@@ -2595,20 +921,7 @@ viewport(X,Y,Width,Height) ->
 %% , and `?GL_TEXTURE', the depth is at least 2. The current matrix in any mode is the
 %% matrix on the top of the stack for that mode. 
 %%
-%% ``gl:pushMatrix'' pushes the current matrix stack down by one, duplicating the current
-%% matrix. That is, after a ``gl:pushMatrix'' call, the matrix on top of the stack is identical
-%% to the one below it. 
-%%
-%%  {@link gl:pushMatrix/0}  pops the current matrix stack, replacing the current matrix with
-%% the one below it on the stack. 
-%%
-%%  Initially, each of the stacks contains one matrix, an identity matrix. 
-%%
-%%  It is an error to push a full matrix stack or to pop a matrix stack that contains only
-%% a single matrix. In either case, the error flag is set and no other change is made to
-%% GL state. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPushMatrix.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPushMatrix.xml">external</a> documentation.
 -spec pushMatrix() -> 'ok'.
 pushMatrix() ->
   cast(5089, <<>>).
@@ -2624,11 +937,7 @@ popMatrix() ->
 %% ``gl:loadIdentity'' replaces the current matrix with the identity matrix. It is semantically
 %% equivalent to calling  {@link gl:loadMatrixd/1}  with the identity matrix 
 %%
-%% ((1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1))
-%%
-%%  but in some cases it is more efficient. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLoadIdentity.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLoadIdentity.xml">external</a> documentation.
 -spec loadIdentity() -> 'ok'.
 loadIdentity() ->
   cast(5091, <<>>).
@@ -2639,16 +948,7 @@ loadIdentity() ->
 %% by  `M' . The current matrix is the projection matrix, modelview matrix, or texture
 %% matrix, depending on the current matrix mode (see  {@link gl:matrixMode/1} ). 
 %%
-%%  The current matrix, M, defines a transformation of coordinates. For instance, assume
-%% M refers to the modelview matrix. If   v=(v[0] v[1] v[2] v[3]) is the set of object coordinates of a vertex,
-%% and  `M'  points to an array of   16 single- or double-precision floating-point values
-%%   m={m[0] m[1] ... m[15]}, then the modelview transformation   M(v) does the following: 
-%%
-%%  M(v)=(m[0] m[4] m[8] m[12] m[1] m[5] m[9] m[13] m[2] m[6] m[10] m[14] m[3] m[7] m[11] m[15])×(v[0] v[1] v[2] v[3])
-%%
-%%  Projection and texture transformations are similarly defined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLoadMatrix.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLoadMatrix.xml">external</a> documentation.
 -spec loadMatrixd(M) -> 'ok' when M :: matrix().
 loadMatrixd({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5092, <<M1:?GLdouble,M2:?GLdouble,M3:?GLdouble,M4:?GLdouble,M5:?GLdouble,M6:?GLdouble,M7:?GLdouble,M8:?GLdouble,M9:?GLdouble,M10:?GLdouble,M11:?GLdouble,M12:?GLdouble,M13:?GLdouble,M14:?GLdouble,M15:?GLdouble,M16:?GLdouble>>);
@@ -2668,10 +968,7 @@ loadMatrixf({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 %% ``gl:multMatrix'' multiplies the current matrix with the one specified using  `M' ,
 %% and replaces the current matrix with the product. 
 %%
-%%  The current matrix is determined by the current matrix mode (see  {@link gl:matrixMode/1} ).
-%% It is either the projection matrix, modelview matrix, or the texture matrix. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMultMatrix.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMultMatrix.xml">external</a> documentation.
 -spec multMatrixd(M) -> 'ok' when M :: matrix().
 multMatrixd({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5094, <<M1:?GLdouble,M2:?GLdouble,M3:?GLdouble,M4:?GLdouble,M5:?GLdouble,M6:?GLdouble,M7:?GLdouble,M8:?GLdouble,M9:?GLdouble,M10:?GLdouble,M11:?GLdouble,M12:?GLdouble,M13:?GLdouble,M14:?GLdouble,M15:?GLdouble,M16:?GLdouble>>);
@@ -2693,16 +990,7 @@ multMatrixf({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 %% replacing the current matrix, as if  {@link gl:multMatrixd/1}  were called with the following
 %% matrix as its argument: 
 %%
-%% (x 2(1-c)+c x  y(1-c)-z  s x  z(1-c)+y  s 0 y  x(1-c)+z  s y 2(1-c)+c y  z(1-c)-x  s 0 x  z(1-c)-y  s y  z(1-c)+x  s z 2(1-c)+c 0 0 0 0
-%% 1)
-%%
-%%  Where   c=cos(angle),   s=sin(angle), and ||(x y z)||=1 (if not, the GL will normalize this vector). 
-%%
-%%  If the matrix mode is either `?GL_MODELVIEW' or `?GL_PROJECTION', all objects
-%% drawn after ``gl:rotate'' is called are rotated. Use  {@link gl:pushMatrix/0}  and  {@link gl:pushMatrix/0} 
-%%  to save and restore the unrotated coordinate system. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glRotate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glRotate.xml">external</a> documentation.
 -spec rotated(Angle, X, Y, Z) -> 'ok' when Angle :: float(),X :: float(),Y :: float(),Z :: float().
 rotated(Angle,X,Y,Z) ->
   cast(5096, <<Angle:?GLdouble,X:?GLdouble,Y:?GLdouble,Z:?GLdouble>>).
@@ -2719,19 +1007,7 @@ rotatef(Angle,X,Y,Z) ->
 %% axes. The three parameters indicate the desired scale factor along each of the three axes.
 %% 
 %%
-%%  The current matrix (see  {@link gl:matrixMode/1} ) is multiplied by this scale matrix, and
-%% the product replaces the current matrix as if  {@link gl:multMatrixd/1}  were called with
-%% the following matrix as its argument: 
-%%
-%% (x 0 0 0 0 y 0 0 0 0 z 0 0 0 0 1)
-%%
-%%  If the matrix mode is either `?GL_MODELVIEW' or `?GL_PROJECTION', all objects
-%% drawn after ``gl:scale'' is called are scaled. 
-%%
-%%  Use  {@link gl:pushMatrix/0}  and  {@link gl:pushMatrix/0}  to save and restore the unscaled
-%% coordinate system. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glScale.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glScale.xml">external</a> documentation.
 -spec scaled(X, Y, Z) -> 'ok' when X :: float(),Y :: float(),Z :: float().
 scaled(X,Y,Z) ->
   cast(5098, <<X:?GLdouble,Y:?GLdouble,Z:?GLdouble>>).
@@ -2748,15 +1024,7 @@ scalef(X,Y,Z) ->
 %% ) is multiplied by this translation matrix, with the product replacing the current matrix,
 %% as if  {@link gl:multMatrixd/1}  were called with the following matrix for its argument: 
 %%
-%% (1 0 0 x 0 1 0 y 0 0 1 z 0 0 0 1)
-%%
-%%  If the matrix mode is either `?GL_MODELVIEW' or `?GL_PROJECTION', all objects
-%% drawn after a call to ``gl:translate'' are translated. 
-%%
-%%  Use  {@link gl:pushMatrix/0}  and  {@link gl:pushMatrix/0}  to save and restore the untranslated
-%% coordinate system. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTranslate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glTranslate.xml">external</a> documentation.
 -spec translated(X, Y, Z) -> 'ok' when X :: float(),Y :: float(),Z :: float().
 translated(X,Y,Z) ->
   cast(5100, <<X:?GLdouble,Y:?GLdouble,Z:?GLdouble>>).
@@ -2772,10 +1040,7 @@ translatef(X,Y,Z) ->
 %% ``gl:isList'' returns `?GL_TRUE' if  `List'  is the name of a display list and
 %% returns `?GL_FALSE' if it is not, or if an error occurs. 
 %%
-%%  A name returned by  {@link gl:genLists/1} , but not yet associated with a display list by
-%% calling  {@link gl:newList/2} , is not the name of a display list. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsList.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glIsList.xml">external</a> documentation.
 -spec isList(List) -> 0|1 when List :: integer().
 isList(List) ->
   call(5102, <<List:?GLuint>>).
@@ -2787,11 +1052,7 @@ isList(List) ->
 %% display lists to delete. All display lists   d with   list&lt;= d&lt;= list+range-1 are
 %% deleted. 
 %%
-%%  All storage locations allocated to the specified display lists are freed, and the names
-%% are available for reuse at a later time. Names within the range that do not have an associated
-%% display list are ignored. If  `Range'  is 0, nothing happens. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteLists.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glDeleteLists.xml">external</a> documentation.
 -spec deleteLists(List, Range) -> 'ok' when List :: integer(),Range :: integer().
 deleteLists(List,Range) ->
   cast(5103, <<List:?GLuint,Range:?GLsizei>>).
@@ -2804,7 +1065,7 @@ deleteLists(List,Range) ->
 %% available, or if any error is generated, no display lists are generated, and 0 is returned.
 %% 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenLists.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGenLists.xml">external</a> documentation.
 -spec genLists(Range) -> integer() when Range :: integer().
 genLists(Range) ->
   call(5104, <<Range:?GLsizei>>).
@@ -2815,53 +1076,14 @@ genLists(Range) ->
 %% Display lists are created with ``gl:newList''. All subsequent commands are placed in
 %% the display list, in the order issued, until  {@link gl:endList/0}  is called. 
 %%
-%% ``gl:newList'' has two arguments. The first argument,  `List' , is a positive integer
-%% that becomes the unique name for the display list. Names can be created and reserved with
-%%  {@link gl:genLists/1}  and tested for uniqueness with  {@link gl:isList/1} . The second argument,
-%%  `Mode' , is a symbolic constant that can assume one of two values: 
-%%
-%% `?GL_COMPILE':  Commands are merely compiled. 
-%%
-%% `?GL_COMPILE_AND_EXECUTE':  Commands are executed as they are compiled into the display
-%% list. 
-%%
-%%  Certain commands are not compiled into the display list but are executed immediately,
-%% regardless of the display-list mode. These commands are  {@link gl:areTexturesResident/1} ,  {@link gl:colorPointer/4} 
-%% ,  {@link gl:deleteLists/2} ,  {@link gl:deleteTextures/1} ,  {@link gl:enableClientState/1} ,  {@link gl:edgeFlagPointer/2} 
-%% ,  {@link gl:enableClientState/1} ,  {@link gl:feedbackBuffer/3} ,  {@link gl:finish/0} ,  {@link gl:flush/0} 
-%% ,  {@link gl:genLists/1} ,  {@link gl:genTextures/1} ,  {@link gl:indexPointer/3} ,  {@link gl:interleavedArrays/3} 
-%% ,  {@link gl:isEnabled/1} ,  {@link gl:isList/1} ,  {@link gl:isTexture/1} ,  {@link gl:normalPointer/3} 
-%% ,  {@link gl:pushClientAttrib/1} ,  {@link gl:pixelStoref/2} ,  {@link gl:pushClientAttrib/1} ,  {@link gl:readPixels/7} 
-%% ,  {@link gl:renderMode/1} ,  {@link gl:selectBuffer/2} ,  {@link gl:texCoordPointer/4} ,  {@link gl:vertexPointer/4} 
-%% , and all of the  {@link gl:getBooleanv/1}  commands. 
-%%
-%%  Similarly,  {@link gl:texImage1D/8} ,  {@link gl:texImage2D/9} , and  {@link gl:texImage3D/10} 
-%% are executed immediately and not compiled into the display list when their first argument
-%% is `?GL_PROXY_TEXTURE_1D', `?GL_PROXY_TEXTURE_1D', or `?GL_PROXY_TEXTURE_3D'
-%% , respectively. 
-%%
-%%  When the ARB_imaging extension is supported,  {@link gl:histogram/4}  executes immediately
-%% when its argument is `?GL_PROXY_HISTOGRAM'. Similarly,  {@link gl:colorTable/6}  executes
-%% immediately when its first argument is `?GL_PROXY_COLOR_TABLE', `?GL_PROXY_POST_CONVOLUTION_COLOR_TABLE'
-%% , or `?GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE'. 
-%%
-%%  For OpenGL versions 1.3 and greater, or when the ARB_multitexture extension is supported,
-%%  {@link gl:clientActiveTexture/1}  is not compiled into display lists, but executed immediately.
-%% 
-%%
-%%  When  {@link gl:endList/0}  is encountered, the display-list definition is completed by
-%% associating the list with the unique name  `List'  (specified in the ``gl:newList''
-%% command). If a display list with name  `List'  already exists, it is replaced only
-%% when  {@link gl:endList/0}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glNewList.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glNewList.xml">external</a> documentation.
 -spec newList(List, Mode) -> 'ok' when List :: integer(),Mode :: enum().
 newList(List,Mode) ->
   cast(5105, <<List:?GLuint,Mode:?GLenum>>).
 
 %% @doc glBeginList
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBeginList.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec endList() -> 'ok'.
 endList() ->
   cast(5106, <<>>).
@@ -2873,17 +1095,7 @@ endList() ->
 %% list. If  `List'  has not been defined as a display list, ``gl:callList'' is ignored.
 %% 
 %%
-%% ``gl:callList'' can appear inside a display list. To avoid the possibility of infinite
-%% recursion resulting from display lists calling one another, a limit is placed on the nesting
-%% level of display lists during display-list execution. This limit is at least 64, and it
-%% depends on the implementation. 
-%%
-%%  GL state is not saved and restored across a call to ``gl:callList''. Thus, changes
-%% made to GL state during the execution of a display list remain after execution of the
-%% display list is completed. Use  {@link gl:pushAttrib/1} ,  {@link gl:pushAttrib/1} ,  {@link gl:pushMatrix/0} 
-%% , and  {@link gl:pushMatrix/0}  to preserve GL state across ``gl:callList'' calls. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCallList.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCallList.xml">external</a> documentation.
 -spec callList(List) -> 'ok' when List :: integer().
 callList(List) ->
   cast(5107, <<List:?GLuint>>).
@@ -2895,62 +1107,7 @@ callList(List) ->
 %% just as if they were called without using a display list. Names of display lists that
 %% have not been defined are ignored. 
 %%
-%% ``gl:callLists'' provides an efficient means for executing more than one display list.  `Type' 
-%%  allows lists with various name formats to be accepted. The formats are as follows: 
-%%
-%% `?GL_BYTE':  `Lists'  is treated as an array of signed bytes, each in the range  
-%% -128 through 127. 
-%%
-%% `?GL_UNSIGNED_BYTE':  `Lists'  is treated as an array of unsigned bytes, each
-%% in the range 0 through 255. 
-%%
-%% `?GL_SHORT':  `Lists'  is treated as an array of signed two-byte integers, each
-%% in the range   -32768 through 32767. 
-%%
-%% `?GL_UNSIGNED_SHORT':  `Lists'  is treated as an array of unsigned two-byte integers,
-%% each in the range 0 through 65535. 
-%%
-%% `?GL_INT':  `Lists'  is treated as an array of signed four-byte integers. 
-%%
-%% `?GL_UNSIGNED_INT':  `Lists'  is treated as an array of unsigned four-byte integers.
-%% 
-%%
-%% `?GL_FLOAT':  `Lists'  is treated as an array of four-byte floating-point values.
-%% 
-%%
-%% `?GL_2_BYTES':  `Lists'  is treated as an array of unsigned bytes. Each pair of
-%% bytes specifies a single display-list name. The value of the pair is computed as 256 times
-%% the unsigned value of the first byte plus the unsigned value of the second byte. 
-%%
-%% `?GL_3_BYTES':  `Lists'  is treated as an array of unsigned bytes. Each triplet
-%% of bytes specifies a single display-list name. The value of the triplet is computed as
-%% 65536 times the unsigned value of the first byte, plus 256 times the unsigned value of
-%% the second byte, plus the unsigned value of the third byte. 
-%%
-%% `?GL_4_BYTES':  `Lists'  is treated as an array of unsigned bytes. Each quadruplet
-%% of bytes specifies a single display-list name. The value of the quadruplet is computed
-%% as 16777216 times the unsigned value of the first byte, plus 65536 times the unsigned
-%% value of the second byte, plus 256 times the unsigned value of the third byte, plus the
-%% unsigned value of the fourth byte. 
-%%
-%%  The list of display-list names is not null-terminated. Rather,  `N'  specifies how
-%% many names are to be taken from  `Lists' . 
-%%
-%%  An additional level of indirection is made available with the  {@link gl:listBase/1}  command,
-%% which specifies an unsigned offset that is added to each display-list name specified in  `Lists' 
-%%  before that display list is executed. 
-%%
-%% ``gl:callLists'' can appear inside a display list. To avoid the possibility of infinite
-%% recursion resulting from display lists calling one another, a limit is placed on the nesting
-%% level of display lists during display-list execution. This limit must be at least 64,
-%% and it depends on the implementation. 
-%%
-%%  GL state is not saved and restored across a call to ``gl:callLists''. Thus, changes
-%% made to GL state during the execution of the display lists remain after execution is completed.
-%% Use  {@link gl:pushAttrib/1} ,  {@link gl:pushAttrib/1} ,  {@link gl:pushMatrix/0} , and  {@link gl:pushMatrix/0} 
-%%  to preserve GL state across ``gl:callLists'' calls. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCallLists.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCallLists.xml">external</a> documentation.
 -spec callLists(Lists) -> 'ok' when Lists :: [integer()].
 callLists(Lists) ->
   ListsLen = length(Lists),
@@ -2965,7 +1122,7 @@ callLists(Lists) ->
 %% by adding  `Base'  to each offset. Names that reference valid display lists are executed;
 %% the others are ignored. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glListBase.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glListBase.xml">external</a> documentation.
 -spec listBase(Base) -> 'ok' when Base :: integer().
 listBase(Base) ->
   cast(5109, <<Base:?GLuint>>).
@@ -2977,66 +1134,7 @@ listBase(Base) ->
 %% ten ways the vertices are interpreted. Taking   n as an integer count starting at one,
 %% and   N as the total number of vertices specified, the interpretations are as follows: 
 %%
-%% `?GL_POINTS':  Treats each vertex as a single point. Vertex   n defines point   n. 
-%% N points are drawn. 
-%%
-%% `?GL_LINES':  Treats each pair of vertices as an independent line segment. Vertices
-%%   2  n-1 and   2  n define line   n.  N/2 lines are drawn. 
-%%
-%% `?GL_LINE_STRIP':  Draws a connected group of line segments from the first vertex
-%% to the last. Vertices   n and   n+1 define line   n.  N-1 lines are drawn. 
-%%
-%% `?GL_LINE_LOOP':  Draws a connected group of line segments from the first vertex
-%% to the last, then back to the first. Vertices   n and   n+1 define line   n. The last
-%% line, however, is defined by vertices   N and   1.  N lines are drawn. 
-%%
-%% `?GL_TRIANGLES':  Treats each triplet of vertices as an independent triangle. Vertices
-%%   3  n-2,  3  n-1, and   3  n define triangle   n.  N/3 triangles are drawn. 
-%%
-%% `?GL_TRIANGLE_STRIP':  Draws a connected group of triangles. One triangle is defined
-%% for each vertex presented after the first two vertices. For odd   n, vertices  n,  n+1,
-%% and   n+2 define triangle   n. For even   n, vertices  n+1,  n, and   n+2 define triangle
-%%   n.  N-2 triangles are drawn. 
-%%
-%% `?GL_TRIANGLE_FAN':  Draws a connected group of triangles. One triangle is defined
-%% for each vertex presented after the first two vertices. Vertices   1,  n+1, and   n+2
-%% define triangle   n.  N-2 triangles are drawn. 
-%%
-%% `?GL_QUADS':  Treats each group of four vertices as an independent quadrilateral.
-%% Vertices   4  n-3,  4  n-2,  4  n-1, and   4  n define quadrilateral   n.  N/4 quadrilaterals
-%% are drawn. 
-%%
-%% `?GL_QUAD_STRIP':  Draws a connected group of quadrilaterals. One quadrilateral is
-%% defined for each pair of vertices presented after the first pair. Vertices   2  n-1,  2 
-%% n,  2  n+2, and   2  n+1 define quadrilateral   n.  N/2-1 quadrilaterals are drawn. Note
-%% that the order in which vertices are used to construct a quadrilateral from strip data
-%% is different from that used with independent data. 
-%%
-%% `?GL_POLYGON':  Draws a single, convex polygon. Vertices   1 through   N define this
-%% polygon. 
-%%
-%%  Only a subset of GL commands can be used between ``gl:'begin''' and  {@link gl:'begin'/1} .
-%% The commands are  {@link gl:vertex2d/2} ,  {@link gl:color3b/3} ,  {@link gl:secondaryColor3b/3} ,  {@link gl:indexd/1} 
-%% ,  {@link gl:normal3b/3} ,  {@link gl:fogCoordf/1} ,  {@link gl:texCoord1d/1} ,  {@link gl:multiTexCoord1d/2} 
-%% ,  {@link gl:vertexAttrib1d/2} ,  {@link gl:evalCoord1d/1} ,  {@link gl:evalPoint1/1} ,  {@link gl:arrayElement/1} 
-%% ,  {@link gl:materialf/3} , and  {@link gl:edgeFlag/1} . Also, it is acceptable to use  {@link gl:callList/1} 
-%%  or  {@link gl:callLists/1}  to execute display lists that include only the preceding commands.
-%% If any other GL command is executed between ``gl:'begin''' and  {@link gl:'begin'/1} , the error
-%% flag is set and the command is ignored. 
-%%
-%%  Regardless of the value chosen for  `Mode' , there is no limit to the number of vertices
-%% that can be defined between ``gl:'begin''' and  {@link gl:'begin'/1} . Lines, triangles, quadrilaterals,
-%% and polygons that are incompletely specified are not drawn. Incomplete specification results
-%% when either too few vertices are provided to specify even a single primitive or when an
-%% incorrect multiple of vertices is specified. The incomplete primitive is ignored; the
-%% rest are drawn. 
-%%
-%%  The minimum specification of vertices for each primitive is as follows: 1 for a point,
-%% 2 for a line, 3 for a triangle, 4 for a quadrilateral, and 3 for a polygon. Modes that
-%% require a certain multiple of vertices are `?GL_LINES' (2), `?GL_TRIANGLES'
-%% (3), `?GL_QUADS' (4), and `?GL_QUAD_STRIP' (2). 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBegin.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glBegin.xml">external</a> documentation.
 -spec 'begin'(Mode) -> 'ok' when Mode :: enum().
 'begin'(Mode) ->
   cast(5110, <<Mode:?GLenum>>).
@@ -3053,10 +1151,7 @@ listBase(Base) ->
 %% point, line, and polygon vertices. The current color, normal, texture coordinates, and
 %% fog coordinate are associated with the vertex when ``gl:vertex'' is called. 
 %%
-%%  When only   x and   y are specified,   z defaults to 0 and  w defaults to 1. When   x, 
-%% y, and   z are specified,   w defaults to 1. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glVertex.xml">external</a> documentation.
 -spec vertex2d(X, Y) -> 'ok' when X :: float(),Y :: float().
 vertex2d(X,Y) ->
   cast(5112, <<X:?GLdouble,Y:?GLdouble>>).
@@ -3182,16 +1277,7 @@ vertex4sv({X,Y,Z,W}) ->  vertex4s(X,Y,Z,W).
 %% mapping that maps the most positive representable integer value to 1.0 and the most negative
 %% representable integer value to   -1.0. 
 %%
-%%  Normals specified with ``gl:normal'' need not have unit length. If `?GL_NORMALIZE'
-%% is enabled, then normals of any length specified with ``gl:normal'' are normalized after
-%% transformation. If `?GL_RESCALE_NORMAL' is enabled, normals are scaled by a scaling
-%% factor derived from the modelview matrix. `?GL_RESCALE_NORMAL' requires that the
-%% originally specified normals were of unit length, and that the modelview matrix contain
-%% only uniform scales for proper results. To enable and disable normalization, call  {@link gl:enable/1} 
-%%  and  {@link gl:enable/1}  with either `?GL_NORMALIZE' or `?GL_RESCALE_NORMAL'.
-%% Normalization is initially disabled. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glNormal.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glNormal.xml">external</a> documentation.
 -spec normal3b(Nx, Ny, Nz) -> 'ok' when Nx :: integer(),Ny :: integer(),Nz :: integer().
 normal3b(Nx,Ny,Nz) ->
   cast(5124, <<Nx:?GLbyte,Ny:?GLbyte,Nz:?GLbyte>>).
@@ -3245,15 +1331,7 @@ normal3sv({Nx,Ny,Nz}) ->  normal3s(Nx,Ny,Nz).
 %% ``gl:index'' updates the current (single-valued) color index. It takes one argument,
 %% the new value for the current color index. 
 %%
-%%  The current index is stored as a floating-point value. Integer values are converted directly
-%% to floating-point values, with no special mapping. The initial value is 1. 
-%%
-%%  Index values outside the representable range of the color index buffer are not clamped.
-%% However, before an index is dithered (if enabled) and written to the frame buffer, it
-%% is converted to fixed-point format. Any bits in the integer portion of the resulting fixed-point
-%% value that do not correspond to bits in the frame buffer are masked out. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIndex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glIndex.xml">external</a> documentation.
 -spec indexd(C) -> 'ok' when C :: float().
 indexd(C) ->
   cast(5129, <<C:?GLdouble>>).
@@ -3310,24 +1388,7 @@ indexubv({C}) ->  indexub(C).
 %% green, and blue values explicitly and set the current alpha value to 1.0 (full intensity)
 %% implicitly. ``gl:color4'' variants specify all four color components explicitly. 
 %%
-%% ``gl:color3b'', ``gl:color4b'', ``gl:color3s'', ``gl:color4s'', ``gl:color3i'',
-%% and ``gl:color4i'' take three or four signed byte, short, or long integers as arguments.
-%% When `v' is appended to the name, the color commands can take a pointer to an array
-%% of such values. 
-%%
-%%  Current color values are stored in floating-point format, with unspecified mantissa and
-%% exponent sizes. Unsigned integer color components, when specified, are linearly mapped
-%% to floating-point values such that the largest representable value maps to 1.0 (full intensity),
-%% and 0 maps to 0.0 (zero intensity). Signed integer color components, when specified, are
-%% linearly mapped to floating-point values such that the most positive representable value
-%% maps to 1.0, and the most negative representable value maps to   -1.0. (Note that this
-%% mapping does not convert 0 precisely to 0.0.) Floating-point values are mapped directly. 
-%%
-%%  Neither floating-point nor signed integer values are clamped to the range  [0 1] before the
-%% current color is updated. However, color components are clamped to this range before they
-%% are interpolated or written into a color buffer. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glColor.xml">external</a> documentation.
 -spec color3b(Red, Green, Blue) -> 'ok' when Red :: integer(),Green :: integer(),Blue :: integer().
 color3b(Red,Green,Blue) ->
   cast(5134, <<Red:?GLbyte,Green:?GLbyte,Blue:?GLbyte>>).
@@ -3494,13 +1555,7 @@ color4usv({Red,Green,Blue,Alpha}) ->  color4us(Red,Green,Blue,Alpha).
 %% Similarly, ``gl:texCoord3'' specifies the texture coordinates as (s t r 1), and ``gl:texCoord4''
 %%  defines all four components explicitly as (s t r q). 
 %%
-%%  The current texture coordinates are part of the data that is associated with each vertex
-%% and with the current raster position. Initially, the values for `s', `t', `r'
-%% , and `q' are (0, 0, 0, 1). 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexCoord.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glTexCoord.xml">external</a> documentation.
 -spec texCoord1d(S) -> 'ok' when S :: float().
 texCoord1d(S) ->
   cast(5150, <<S:?GLdouble>>).
@@ -3666,41 +1721,7 @@ texCoord4sv({S,T,R,Q}) ->  texCoord4s(S,T,R,Q).
 %% subpixel accuracy. See  {@link gl:bitmap/7} ,  {@link gl:drawPixels/5} , and  {@link gl:copyPixels/5} 
 %% . 
 %%
-%%  The current raster position consists of three window coordinates ( x,  y,  z), a clip
-%% coordinate value  ( w), an eye coordinate distance, a valid bit, and associated color
-%% data and texture coordinates. The   w coordinate is a clip coordinate, because   w is
-%% not projected to window coordinates. ``gl:rasterPos4'' specifies object coordinates   x,
-%%  y,  z, and   w explicitly. ``gl:rasterPos3'' specifies object coordinate   x,  y, and
-%%   z explicitly, while   w is implicitly set to 1. ``gl:rasterPos2'' uses the argument
-%% values for   x and   y while implicitly setting   z and   w to 0 and 1. 
-%%
-%%  The object coordinates presented by ``gl:rasterPos'' are treated just like those of a  {@link gl:vertex2d/2} 
-%%  command: They are transformed by the current modelview and projection matrices and passed
-%% to the clipping stage. If the vertex is not culled, then it is projected and scaled to
-%% window coordinates, which become the new current raster position, and the `?GL_CURRENT_RASTER_POSITION_VALID'
-%%  flag is set. If the vertex `is' culled, then the valid bit is cleared and the current
-%% raster position and associated color and texture coordinates are undefined. 
-%%
-%%  The current raster position also includes some associated color data and texture coordinates.
-%% If lighting is enabled, then `?GL_CURRENT_RASTER_COLOR' (in RGBA mode) or `?GL_CURRENT_RASTER_INDEX'
-%%  (in color index mode) is set to the color produced by the lighting calculation (see  {@link gl:lightf/3} 
-%% ,  {@link gl:lightModelf/2} , and  {@link gl:shadeModel/1} ). If lighting is disabled, current
-%% color (in RGBA mode, state variable `?GL_CURRENT_COLOR') or color index (in color
-%% index mode, state variable `?GL_CURRENT_INDEX') is used to update the current raster
-%% color. `?GL_CURRENT_RASTER_SECONDARY_COLOR' (in RGBA mode) is likewise updated. 
-%%
-%%  Likewise, `?GL_CURRENT_RASTER_TEXTURE_COORDS' is updated as a function of `?GL_CURRENT_TEXTURE_COORDS'
-%% , based on the texture matrix and the texture generation functions (see  {@link gl:texGend/3} ).
-%% Finally, the distance from the origin of the eye coordinate system to the vertex as transformed
-%% by only the modelview matrix replaces `?GL_CURRENT_RASTER_DISTANCE'. 
-%%
-%%  Initially, the current raster position is (0, 0, 0, 1), the current raster distance is
-%% 0, the valid bit is set, the associated RGBA color is (1, 1, 1, 1), the associated color
-%% index is 1, and the associated texture coordinates are (0, 0, 0, 1). In RGBA mode, `?GL_CURRENT_RASTER_INDEX'
-%%  is always 1; in color index mode, the current raster RGBA color always maintains its
-%% initial value. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glRasterPos.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glRasterPos.xml">external</a> documentation.
 -spec rasterPos2d(X, Y) -> 'ok' when X :: float(),Y :: float().
 rasterPos2d(X,Y) ->
   cast(5166, <<X:?GLdouble,Y:?GLdouble>>).
@@ -3826,13 +1847,7 @@ rasterPos4sv({X,Y,Z,W}) ->  rasterPos4s(X,Y,Z,W).
 %% coordinates or as two pointers to arrays, each containing an  (x y) pair. The resulting rectangle
 %% is defined in the   z=0 plane. 
 %%
-%% ``gl:rect''( `X1' ,  `Y1' ,  `X2' ,  `Y2' ) is exactly equivalent to the
-%% following sequence:  glBegin(`?GL_POLYGON'); glVertex2( `X1' ,  `Y1' ); glVertex2(
-%%  `X2' ,  `Y1' ); glVertex2( `X2' ,  `Y2' ); glVertex2( `X1' ,  `Y2' );
-%% glEnd();  Note that if the second vertex is above and to the right of the first vertex,
-%% the rectangle is constructed with a counterclockwise winding. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glRect.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glRect.xml">external</a> documentation.
 -spec rectd(X1, Y1, X2, Y2) -> 'ok' when X1 :: float(),Y1 :: float(),X2 :: float(),Y2 :: float().
 rectd(X1,Y1,X2,Y2) ->
   cast(5178, <<X1:?GLdouble,Y1:?GLdouble,X2:?GLdouble,Y2:?GLdouble>>).
@@ -3888,21 +1903,7 @@ rectsv({V1,V2},{V1,V2}) ->
 %% to be packed into a single array or stored in separate arrays. (Single-array storage may
 %% be more efficient on some implementations; see  {@link gl:interleavedArrays/3} .) 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a vertex array is specified,  `Pointer'  is treated as a byte offset into the
-%% buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as vertex array client-side state (`?GL_VERTEX_ARRAY_BUFFER_BINDING'). 
-%%
-%%  When a vertex array is specified,  `Size' ,  `Type' ,  `Stride' , and  `Pointer' 
-%%  are saved as client-side state, in addition to the current vertex array buffer object
-%% binding. 
-%%
-%%  To enable and disable the vertex array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_VERTEX_ARRAY'. If enabled, the vertex array is used when  {@link gl:arrayElement/1} 
-%% ,  {@link gl:drawArrays/3} ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements'
-%% , or  {@link gl:drawRangeElements/6}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glVertexPointer.xml">external</a> documentation.
 -spec vertexPointer(Size, Type, Stride, Ptr) -> 'ok' when Size :: integer(),Type :: enum(),Stride :: integer(),Ptr :: offset()|mem().
 vertexPointer(Size,Type,Stride,Ptr) when  is_integer(Ptr) ->
   cast(5186, <<Size:?GLint,Type:?GLenum,Stride:?GLsizei,Ptr:?GLuint>>);
@@ -3918,22 +1919,7 @@ vertexPointer(Size,Type,Stride,Ptr) ->
 %% to be packed into a single array or stored in separate arrays. (Single-array storage may
 %% be more efficient on some implementations; see  {@link gl:interleavedArrays/3} .) 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a normal array is specified,  `Pointer'  is treated as a byte offset into the
-%% buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as normal vertex array client-side state (`?GL_NORMAL_ARRAY_BUFFER_BINDING'
-%% ). 
-%%
-%%  When a normal array is specified,  `Type' ,  `Stride' , and  `Pointer'  are
-%% saved as client-side state, in addition to the current vertex array buffer object binding.
-%% 
-%%
-%%  To enable and disable the normal array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_NORMAL_ARRAY'. If enabled, the normal array is used when  {@link gl:drawArrays/3} 
-%% ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements',  {@link gl:drawRangeElements/6} 
-%% , or  {@link gl:arrayElement/1}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glNormalPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glNormalPointer.xml">external</a> documentation.
 -spec normalPointer(Type, Stride, Ptr) -> 'ok' when Type :: enum(),Stride :: integer(),Ptr :: offset()|mem().
 normalPointer(Type,Stride,Ptr) when  is_integer(Ptr) ->
   cast(5188, <<Type:?GLenum,Stride:?GLsizei,Ptr:?GLuint>>);
@@ -3950,22 +1936,7 @@ normalPointer(Type,Stride,Ptr) ->
 %% to be packed into a single array or stored in separate arrays. (Single-array storage may
 %% be more efficient on some implementations; see  {@link gl:interleavedArrays/3} .) 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a color array is specified,  `Pointer'  is treated as a byte offset into the
-%% buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as color vertex array client-side state (`?GL_COLOR_ARRAY_BUFFER_BINDING').
-%% 
-%%
-%%  When a color array is specified,  `Size' ,  `Type' ,  `Stride' , and  `Pointer' 
-%%  are saved as client-side state, in addition to the current vertex array buffer object
-%% binding. 
-%%
-%%  To enable and disable the color array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_COLOR_ARRAY'. If enabled, the color array is used when  {@link gl:drawArrays/3} 
-%% ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements',  {@link gl:drawRangeElements/6} 
-%% , or  {@link gl:arrayElement/1}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glColorPointer.xml">external</a> documentation.
 -spec colorPointer(Size, Type, Stride, Ptr) -> 'ok' when Size :: integer(),Type :: enum(),Stride :: integer(),Ptr :: offset()|mem().
 colorPointer(Size,Type,Stride,Ptr) when  is_integer(Ptr) ->
   cast(5190, <<Size:?GLint,Type:?GLenum,Stride:?GLsizei,Ptr:?GLuint>>);
@@ -3980,22 +1951,7 @@ colorPointer(Size,Type,Stride,Ptr) ->
 %%  specifies the byte stride from one color index to the next, allowing vertices and attributes
 %% to be packed into a single array or stored in separate arrays. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a color index array is specified,  `Pointer'  is treated as a byte offset into
-%% the buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as color index vertex array client-side state (`?GL_INDEX_ARRAY_BUFFER_BINDING'
-%% ). 
-%%
-%%  When a color index array is specified,  `Type' ,  `Stride' , and  `Pointer' 
-%% are saved as client-side state, in addition to the current vertex array buffer object
-%% binding. 
-%%
-%%  To enable and disable the color index array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_INDEX_ARRAY'. If enabled, the color index array is used when
-%%  {@link gl:drawArrays/3} ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements'
-%% ,  {@link gl:drawRangeElements/6} , or  {@link gl:arrayElement/1}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIndexPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glIndexPointer.xml">external</a> documentation.
 -spec indexPointer(Type, Stride, Ptr) -> 'ok' when Type :: enum(),Stride :: integer(),Ptr :: offset()|mem().
 indexPointer(Type,Stride,Ptr) when  is_integer(Ptr) ->
   cast(5192, <<Type:?GLenum,Stride:?GLsizei,Ptr:?GLuint>>);
@@ -4013,23 +1969,7 @@ indexPointer(Type,Stride,Ptr) ->
 %% array or stored in separate arrays. (Single-array storage may be more efficient on some
 %% implementations; see  {@link gl:interleavedArrays/3} .) 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a texture coordinate array is specified,  `Pointer'  is treated as a byte offset
-%% into the buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as texture coordinate vertex array client-side state (`?GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING'
-%% ). 
-%%
-%%  When a texture coordinate array is specified,  `Size' ,  `Type' ,  `Stride' ,
-%% and  `Pointer'  are saved as client-side state, in addition to the current vertex array
-%% buffer object binding. 
-%%
-%%  To enable and disable a texture coordinate array, call  {@link gl:enableClientState/1} 
-%% and  {@link gl:enableClientState/1}  with the argument `?GL_TEXTURE_COORD_ARRAY'. If
-%% enabled, the texture coordinate array is used when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} 
-%% ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements',
-%% or  {@link gl:drawRangeElements/6}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexCoordPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glTexCoordPointer.xml">external</a> documentation.
 -spec texCoordPointer(Size, Type, Stride, Ptr) -> 'ok' when Size :: integer(),Type :: enum(),Stride :: integer(),Ptr :: offset()|mem().
 texCoordPointer(Size,Type,Stride,Ptr) when  is_integer(Ptr) ->
   cast(5194, <<Size:?GLint,Type:?GLenum,Stride:?GLsizei,Ptr:?GLuint>>);
@@ -4044,21 +1984,7 @@ texCoordPointer(Size,Type,Stride,Ptr) ->
 %% flag to the next, allowing vertices and attributes to be packed into a single array or
 %% stored in separate arrays. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while an edge flag array is specified,  `Pointer'  is treated as a byte offset into
-%% the buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as edge flag vertex array client-side state (`?GL_EDGE_FLAG_ARRAY_BUFFER_BINDING'
-%% ). 
-%%
-%%  When an edge flag array is specified,  `Stride'  and  `Pointer'  are saved as client-side
-%% state, in addition to the current vertex array buffer object binding. 
-%%
-%%  To enable and disable the edge flag array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_EDGE_FLAG_ARRAY'. If enabled, the edge flag array is used
-%% when  {@link gl:drawArrays/3} ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements'
-%% ,  {@link gl:drawRangeElements/6} , or  {@link gl:arrayElement/1}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEdgeFlagPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glEdgeFlagPointer.xml">external</a> documentation.
 -spec edgeFlagPointer(Stride, Ptr) -> 'ok' when Stride :: integer(),Ptr :: offset()|mem().
 edgeFlagPointer(Stride,Ptr) when  is_integer(Ptr) ->
   cast(5196, <<Stride:?GLsizei,Ptr:?GLuint>>);
@@ -4075,18 +2001,7 @@ edgeFlagPointer(Stride,Ptr) ->
 %%  is not enabled, no drawing occurs but the attributes corresponding to the enabled arrays
 %% are modified. 
 %%
-%%  Use ``gl:arrayElement'' to construct primitives by indexing vertex data, rather than
-%% by streaming through arrays of data in first-to-last order. Because each call specifies
-%% only a single vertex, it is possible to explicitly specify per-primitive attributes such
-%% as a single normal for each triangle. 
-%%
-%%  Changes made to array data between the execution of  {@link gl:'begin'/1}  and the corresponding
-%% execution of  {@link gl:'begin'/1}  may affect calls to ``gl:arrayElement'' that are made within
-%% the same  {@link gl:'begin'/1} / {@link gl:'begin'/1}  period in nonsequential ways. That is, a call
-%% to ``gl:arrayElement'' that precedes a change to array data may access the changed data,
-%% and a call that follows a change to array data may access original data. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glArrayElement.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glArrayElement.xml">external</a> documentation.
 -spec arrayElement(I) -> 'ok' when I :: integer().
 arrayElement(I) ->
   cast(5198, <<I:?GLint>>).
@@ -4099,15 +2014,7 @@ arrayElement(I) ->
 %% and use them to construct a sequence of primitives with a single call to ``gl:drawArrays''
 %% . 
 %%
-%%  When ``gl:drawArrays'' is called, it uses  `Count'  sequential elements from each
-%% enabled array to construct a sequence of geometric primitives, beginning with element  `First' 
-%% .  `Mode'  specifies what kind of primitives are constructed and how the array elements
-%% construct those primitives. 
-%%
-%%  Vertex attributes that are modified by ``gl:drawArrays'' have an unspecified value
-%% after ``gl:drawArrays'' returns. Attributes that aren't modified remain well defined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawArrays.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawArrays.xhtml">external</a> documentation.
 -spec drawArrays(Mode, First, Count) -> 'ok' when Mode :: enum(),First :: integer(),Count :: integer().
 drawArrays(Mode,First,Count) ->
   cast(5199, <<Mode:?GLenum,First:?GLint,Count:?GLsizei>>).
@@ -4120,16 +2027,7 @@ drawArrays(Mode,First,Count) ->
 %% and so on, and use them to construct a sequence of primitives with a single call to ``gl:drawElements''
 %% . 
 %%
-%%  When ``gl:drawElements'' is called, it uses  `Count'  sequential elements from an
-%% enabled array, starting at  `Indices'  to construct a sequence of geometric primitives.
-%%  `Mode'  specifies what kind of primitives are constructed and how the array elements
-%% construct these primitives. If more than one array is enabled, each is used. 
-%%
-%%  Vertex attributes that are modified by ``gl:drawElements'' have an unspecified value
-%% after ``gl:drawElements'' returns. Attributes that aren't modified maintain their previous
-%% values. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElements.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawElements.xhtml">external</a> documentation.
 -spec drawElements(Mode, Count, Type, Indices) -> 'ok' when Mode :: enum(),Count :: integer(),Type :: enum(),Indices :: offset()|mem().
 drawElements(Mode,Count,Type,Indices) when  is_integer(Indices) ->
   cast(5200, <<Mode:?GLenum,Count:?GLsizei,Type:?GLenum,Indices:?GLuint>>);
@@ -4143,21 +2041,7 @@ drawElements(Mode,Count,Type,Indices) ->
 %% and vertex arrays whose elements are part of a larger aggregate array element. For some
 %% implementations, this is more efficient than specifying the arrays separately. 
 %%
-%%  If  `Stride'  is 0, the aggregate elements are stored consecutively. Otherwise,  `Stride' 
-%%  bytes occur between the beginning of one aggregate array element and the beginning of
-%% the next aggregate array element. 
-%%
-%%  `Format'  serves as a ``key'' describing the extraction of individual arrays from
-%% the aggregate array. If  `Format'  contains a T, then texture coordinates are extracted
-%% from the interleaved array. If C is present, color values are extracted. If N is present,
-%% normal coordinates are extracted. Vertex coordinates are always extracted. 
-%%
-%%  The digits 2, 3, and 4 denote how many values are extracted. F indicates that values
-%% are extracted as floating-point values. Colors may also be extracted as 4 unsigned bytes
-%% if 4UB follows the C. If a color is extracted as 4 unsigned bytes, the vertex array element
-%% which follows is located at the first possible floating-point aligned address. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glInterleavedArrays.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glInterleavedArrays.xml">external</a> documentation.
 -spec interleavedArrays(Format, Stride, Pointer) -> 'ok' when Format :: enum(),Stride :: integer(),Pointer :: offset()|mem().
 interleavedArrays(Format,Stride,Pointer) when  is_integer(Pointer) ->
   cast(5202, <<Format:?GLenum,Stride:?GLsizei,Pointer:?GLuint>>);
@@ -4175,23 +2059,7 @@ interleavedArrays(Format,Stride,Pointer) ->
 %% result of lighting if lighting is enabled, or it is the current color at the time the
 %% vertex was specified if lighting is disabled. 
 %%
-%%  Flat and smooth shading are indistinguishable for points. Starting when  {@link gl:'begin'/1} 
-%% is issued and counting vertices and primitives from 1, the GL gives each flat-shaded line
-%% segment   i the computed color of vertex   i+1, its second vertex. Counting similarly
-%% from 1, the GL gives each flat-shaded polygon the computed color of the vertex listed
-%% in the following table. This is the last vertex to specify the polygon in all cases except
-%% single polygons, where the first vertex specifies the flat-shaded color. 
-%%
-%% <table><tbody><tr><td>` Primitive Type of Polygon  ' i</td><td>` Vertex '</td></tr>
-%% </tbody><tbody><tr><td> Single polygon  ( i== 1) </td><td> 1 </td></tr><tr><td> Triangle
-%% strip </td><td> i+2</td></tr><tr><td> Triangle fan </td><td> i+2</td></tr><tr><td> Independent
-%% triangle </td><td> 3  i</td></tr><tr><td> Quad strip </td><td> 2  i+2</td></tr><tr><td>
-%% Independent quad  </td><td> 4  i</td></tr></tbody></table>
-%%
-%%  Flat and smooth shading are specified by ``gl:shadeModel'' with  `Mode'  set to `?GL_FLAT'
-%%  and `?GL_SMOOTH', respectively. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glShadeModel.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glShadeModel.xml">external</a> documentation.
 -spec shadeModel(Mode) -> 'ok' when Mode :: enum().
 shadeModel(Mode) ->
   cast(5204, <<Mode:?GLenum>>).
@@ -4204,88 +2072,7 @@ shadeModel(Mode) ->
 %% parameters, again by symbolic name.  `Params'  is either a single value or a pointer
 %% to an array that contains the new values. 
 %%
-%%  To enable and disable lighting calculation, call  {@link gl:enable/1}  and  {@link gl:enable/1} 
-%%  with argument `?GL_LIGHTING'. Lighting is initially disabled. When it is enabled,
-%% light sources that are enabled contribute to the lighting calculation. Light source   i
-%% is enabled and disabled using  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_LIGHT'
-%%  i. 
-%%
-%%  The ten light parameters are as follows: 
-%%
-%% `?GL_AMBIENT':  `Params'  contains four integer or floating-point values that
-%% specify the ambient RGBA intensity of the light. Integer values are mapped linearly such
-%% that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial ambient light intensity is (0, 0, 0, 1). 
-%%
-%% `?GL_DIFFUSE':  `Params'  contains four integer or floating-point values that
-%% specify the diffuse RGBA intensity of the light. Integer values are mapped linearly such
-%% that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial value for `?GL_LIGHT0' is (1, 1, 1, 1); for other
-%% lights, the initial value is (0, 0, 0, 1). 
-%%
-%% `?GL_SPECULAR':  `Params'  contains four integer or floating-point values that
-%% specify the specular RGBA intensity of the light. Integer values are mapped linearly such
-%% that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial value for `?GL_LIGHT0' is (1, 1, 1, 1); for other
-%% lights, the initial value is (0, 0, 0, 1). 
-%%
-%% `?GL_POSITION':  `Params'  contains four integer or floating-point values that
-%% specify the position of the light in homogeneous object coordinates. Both integer and
-%% floating-point values are mapped directly. Neither integer nor floating-point values are
-%% clamped. 
-%%
-%%  The position is transformed by the modelview matrix when ``gl:light'' is called (just
-%% as if it were a point), and it is stored in eye coordinates. If the   w component of the
-%% position is 0, the light is treated as a directional source. Diffuse and specular lighting
-%% calculations take the light's direction, but not its actual position, into account, and
-%% attenuation is disabled. Otherwise, diffuse and specular lighting calculations are based
-%% on the actual location of the light in eye coordinates, and attenuation is enabled. The
-%% initial position is (0, 0, 1, 0); thus, the initial light source is directional, parallel
-%% to, and in the direction of the  -z axis. 
-%%
-%% `?GL_SPOT_DIRECTION':  `Params'  contains three integer or floating-point values
-%% that specify the direction of the light in homogeneous object coordinates. Both integer
-%% and floating-point values are mapped directly. Neither integer nor floating-point values
-%% are clamped. 
-%%
-%%  The spot direction is transformed by the upper 3x3 of the modelview matrix when ``gl:light''
-%%  is called, and it is stored in eye coordinates. It is significant only when `?GL_SPOT_CUTOFF'
-%%  is not 180, which it is initially. The initial direction is  (0 0 -1). 
-%%
-%% `?GL_SPOT_EXPONENT':  `Params'  is a single integer or floating-point value that
-%% specifies the intensity distribution of the light. Integer and floating-point values are
-%% mapped directly. Only values in the range  [0 128] are accepted. 
-%%
-%%  Effective light intensity is attenuated by the cosine of the angle between the direction
-%% of the light and the direction from the light to the vertex being lighted, raised to the
-%% power of the spot exponent. Thus, higher spot exponents result in a more focused light
-%% source, regardless of the spot cutoff angle (see `?GL_SPOT_CUTOFF', next paragraph).
-%% The initial spot exponent is 0, resulting in uniform light distribution. 
-%%
-%% `?GL_SPOT_CUTOFF':  `Params'  is a single integer or floating-point value that
-%% specifies the maximum spread angle of a light source. Integer and floating-point values
-%% are mapped directly. Only values in the range  [0 90] and the special value 180 are accepted.
-%% If the angle between the direction of the light and the direction from the light to the
-%% vertex being lighted is greater than the spot cutoff angle, the light is completely masked.
-%% Otherwise, its intensity is controlled by the spot exponent and the attenuation factors.
-%% The initial spot cutoff is 180, resulting in uniform light distribution. 
-%%
-%% `?GL_CONSTANT_ATTENUATION'
-%%
-%% `?GL_LINEAR_ATTENUATION'
-%%
-%% `?GL_QUADRATIC_ATTENUATION':  `Params'  is a single integer or floating-point
-%% value that specifies one of the three light attenuation factors. Integer and floating-point
-%% values are mapped directly. Only nonnegative values are accepted. If the light is positional,
-%% rather than directional, its intensity is attenuated by the reciprocal of the sum of the
-%% constant factor, the linear factor times the distance between the light and the vertex
-%% being lighted, and the quadratic factor times the square of the same distance. The initial
-%% attenuation factors are (1, 0, 0), resulting in no attenuation. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLight.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLight.xml">external</a> documentation.
 -spec lightf(Light, Pname, Param) -> 'ok' when Light :: enum(),Pname :: enum(),Param :: float().
 lightf(Light,Pname,Param) ->
   cast(5205, <<Light:?GLenum,Pname:?GLenum,Param:?GLfloat>>).
@@ -4318,73 +2105,7 @@ lightiv(Light,Pname,Params) ->
 %% implementation dependent constant that is greater than or equal to eight.  `Pname' 
 %% specifies one of ten light source parameters, again by symbolic name. 
 %%
-%%  The following parameters are defined: 
-%%
-%% `?GL_AMBIENT':  `Params'  returns four integer or floating-point values representing
-%% the ambient intensity of the light source. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value is (0, 0, 0, 1). 
-%%
-%% `?GL_DIFFUSE':  `Params'  returns four integer or floating-point values representing
-%% the diffuse intensity of the light source. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value for `?GL_LIGHT0' is (1, 1, 1, 1); for
-%% other lights, the initial value is (0, 0, 0, 0). 
-%%
-%% `?GL_SPECULAR':  `Params'  returns four integer or floating-point values representing
-%% the specular intensity of the light source. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value for `?GL_LIGHT0' is (1, 1, 1, 1); for
-%% other lights, the initial value is (0, 0, 0, 0). 
-%%
-%% `?GL_POSITION':  `Params'  returns four integer or floating-point values representing
-%% the position of the light source. Integer values, when requested, are computed by rounding
-%% the internal floating-point values to the nearest integer value. The returned values are
-%% those maintained in eye coordinates. They will not be equal to the values specified using
-%%  {@link gl:lightf/3} , unless the modelview matrix was identity at the time  {@link gl:lightf/3} 
-%% was called. The initial value is (0, 0, 1, 0). 
-%%
-%% `?GL_SPOT_DIRECTION':  `Params'  returns three integer or floating-point values
-%% representing the direction of the light source. Integer values, when requested, are computed
-%% by rounding the internal floating-point values to the nearest integer value. The returned
-%% values are those maintained in eye coordinates. They will not be equal to the values specified
-%% using  {@link gl:lightf/3} , unless the modelview matrix was identity at the time  {@link gl:lightf/3} 
-%%  was called. Although spot direction is normalized before being used in the lighting equation,
-%% the returned values are the transformed versions of the specified values prior to normalization.
-%% The initial value is  (0 0 -1). 
-%%
-%% `?GL_SPOT_EXPONENT':  `Params'  returns a single integer or floating-point value
-%% representing the spot exponent of the light. An integer value, when requested, is computed
-%% by rounding the internal floating-point representation to the nearest integer. The initial
-%% value is 0. 
-%%
-%% `?GL_SPOT_CUTOFF':  `Params'  returns a single integer or floating-point value
-%% representing the spot cutoff angle of the light. An integer value, when requested, is
-%% computed by rounding the internal floating-point representation to the nearest integer.
-%% The initial value is 180. 
-%%
-%% `?GL_CONSTANT_ATTENUATION':  `Params'  returns a single integer or floating-point
-%% value representing the constant (not distance-related) attenuation of the light. An integer
-%% value, when requested, is computed by rounding the internal floating-point representation
-%% to the nearest integer. The initial value is 1. 
-%%
-%% `?GL_LINEAR_ATTENUATION':  `Params'  returns a single integer or floating-point
-%% value representing the linear attenuation of the light. An integer value, when requested,
-%% is computed by rounding the internal floating-point representation to the nearest integer.
-%% The initial value is 0. 
-%%
-%% `?GL_QUADRATIC_ATTENUATION':  `Params'  returns a single integer or floating-point
-%% value representing the quadratic attenuation of the light. An integer value, when requested,
-%% is computed by rounding the internal floating-point representation to the nearest integer.
-%% The initial value is 0. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetLight.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetLight.xml">external</a> documentation.
 -spec getLightfv(Light, Pname) -> {float(),float(),float(),float()} when Light :: enum(),Pname :: enum().
 getLightfv(Light,Pname) ->
   call(5209, <<Light:?GLenum,Pname:?GLenum>>).
@@ -4400,63 +2121,7 @@ getLightiv(Light,Pname) ->
 %% ``gl:lightModel'' sets the lighting model parameter.  `Pname'  names a parameter
 %% and  `Params'  gives the new value. There are three lighting model parameters: 
 %%
-%% `?GL_LIGHT_MODEL_AMBIENT':  `Params'  contains four integer or floating-point
-%% values that specify the ambient RGBA intensity of the entire scene. Integer values are
-%% mapped linearly such that the most positive representable value maps to 1.0, and the most
-%% negative representable value maps to   -1.0. Floating-point values are mapped directly.
-%% Neither integer nor floating-point values are clamped. The initial ambient scene intensity
-%% is (0.2, 0.2, 0.2, 1.0). 
-%%
-%% `?GL_LIGHT_MODEL_COLOR_CONTROL':  `Params'  must be either `?GL_SEPARATE_SPECULAR_COLOR'
-%%  or `?GL_SINGLE_COLOR'. `?GL_SINGLE_COLOR' specifies that a single color is
-%% generated from the lighting computation for a vertex. `?GL_SEPARATE_SPECULAR_COLOR'
-%% specifies that the specular color computation of lighting be stored separately from the
-%% remainder of the lighting computation. The specular color is summed into the generated
-%% fragment's color after the application of texture mapping (if enabled). The initial value
-%% is `?GL_SINGLE_COLOR'. 
-%%
-%% `?GL_LIGHT_MODEL_LOCAL_VIEWER':  `Params'  is a single integer or floating-point
-%% value that specifies how specular reflection angles are computed. If  `Params'  is
-%% 0 (or 0.0), specular reflection angles take the view direction to be parallel to and in
-%% the direction of the -`z' axis, regardless of the location of the vertex in eye coordinates.
-%% Otherwise, specular reflections are computed from the origin of the eye coordinate system.
-%% The initial value is 0. 
-%%
-%% `?GL_LIGHT_MODEL_TWO_SIDE':  `Params'  is a single integer or floating-point value
-%% that specifies whether one- or two-sided lighting calculations are done for polygons.
-%% It has no effect on the lighting calculations for points, lines, or bitmaps. If  `Params' 
-%%  is 0 (or 0.0), one-sided lighting is specified, and only the `front' material parameters
-%% are used in the lighting equation. Otherwise, two-sided lighting is specified. In this
-%% case, vertices of back-facing polygons are lighted using the `back' material parameters
-%% and have their normals reversed before the lighting equation is evaluated. Vertices of
-%% front-facing polygons are always lighted using the `front' material parameters, with
-%% no change to their normals. The initial value is 0. 
-%%
-%%  In RGBA mode, the lighted color of a vertex is the sum of the material emission intensity,
-%% the product of the material ambient reflectance and the lighting model full-scene ambient
-%% intensity, and the contribution of each enabled light source. Each light source contributes
-%% the sum of three terms: ambient, diffuse, and specular. The ambient light source contribution
-%% is the product of the material ambient reflectance and the light's ambient intensity.
-%% The diffuse light source contribution is the product of the material diffuse reflectance,
-%% the light's diffuse intensity, and the dot product of the vertex's normal with the normalized
-%% vector from the vertex to the light source. The specular light source contribution is
-%% the product of the material specular reflectance, the light's specular intensity, and
-%% the dot product of the normalized vertex-to-eye and vertex-to-light vectors, raised to
-%% the power of the shininess of the material. All three light source contributions are attenuated
-%% equally based on the distance from the vertex to the light source and on light source
-%% direction, spread exponent, and spread cutoff angle. All dot products are replaced with
-%% 0 if they evaluate to a negative value. 
-%%
-%%  The alpha component of the resulting lighted color is set to the alpha value of the material
-%% diffuse reflectance. 
-%%
-%%  In color index mode, the value of the lighted index of a vertex ranges from the ambient
-%% to the specular values passed to  {@link gl:materialf/3}  using `?GL_COLOR_INDEXES'.
-%% Diffuse and specular coefficients, computed with a (.30, .59, .11) weighting of the lights'
-%% colors, the shininess of the material, and the same reflection and attenuation equations
-%% as in the RGBA case, determine how much above ambient the resulting index is. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLightModel.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLightModel.xml">external</a> documentation.
 -spec lightModelf(Pname, Param) -> 'ok' when Pname :: enum(),Param :: float().
 lightModelf(Pname,Param) ->
   cast(5211, <<Pname:?GLenum,Param:?GLfloat>>).
@@ -4490,60 +2155,7 @@ lightModeliv(Pname,Params) ->
 %% to shade back-facing polygons only when two-sided lighting is enabled. Refer to the  {@link gl:lightModelf/2} 
 %%  reference page for details concerning one- and two-sided lighting calculations. 
 %%
-%% ``gl:material'' takes three arguments. The first,  `Face' , specifies whether the `?GL_FRONT'
-%%  materials, the `?GL_BACK' materials, or both `?GL_FRONT_AND_BACK' materials
-%% will be modified. The second,  `Pname' , specifies which of several parameters in one
-%% or both sets will be modified. The third,  `Params' , specifies what value or values
-%% will be assigned to the specified parameter. 
-%%
-%%  Material parameters are used in the lighting equation that is optionally applied to each
-%% vertex. The equation is discussed in the  {@link gl:lightModelf/2}  reference page. The parameters
-%% that can be specified using ``gl:material'', and their interpretations by the lighting
-%% equation, are as follows: 
-%%
-%% `?GL_AMBIENT':  `Params'  contains four integer or floating-point values that
-%% specify the ambient RGBA reflectance of the material. Integer values are mapped linearly
-%% such that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial ambient reflectance for both front- and back-facing materials
-%% is (0.2, 0.2, 0.2, 1.0). 
-%%
-%% `?GL_DIFFUSE':  `Params'  contains four integer or floating-point values that
-%% specify the diffuse RGBA reflectance of the material. Integer values are mapped linearly
-%% such that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial diffuse reflectance for both front- and back-facing materials
-%% is (0.8, 0.8, 0.8, 1.0). 
-%%
-%% `?GL_SPECULAR':  `Params'  contains four integer or floating-point values that
-%% specify the specular RGBA reflectance of the material. Integer values are mapped linearly
-%% such that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial specular reflectance for both front- and back-facing materials
-%% is (0, 0, 0, 1). 
-%%
-%% `?GL_EMISSION':  `Params'  contains four integer or floating-point values that
-%% specify the RGBA emitted light intensity of the material. Integer values are mapped linearly
-%% such that the most positive representable value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Floating-point values are mapped directly. Neither integer nor floating-point
-%% values are clamped. The initial emission intensity for both front- and back-facing materials
-%% is (0, 0, 0, 1). 
-%%
-%% `?GL_SHININESS':  `Params'  is a single integer or floating-point value that specifies
-%% the RGBA specular exponent of the material. Integer and floating-point values are mapped
-%% directly. Only values in the range  [0 128] are accepted. The initial specular exponent for both
-%% front- and back-facing materials is 0. 
-%%
-%% `?GL_AMBIENT_AND_DIFFUSE':  Equivalent to calling ``gl:material'' twice with the
-%% same parameter values, once with `?GL_AMBIENT' and once with `?GL_DIFFUSE'. 
-%%
-%% `?GL_COLOR_INDEXES':  `Params'  contains three integer or floating-point values
-%% specifying the color indices for ambient, diffuse, and specular lighting. These three
-%% values, and `?GL_SHININESS', are the only material values used by the color index
-%% mode lighting equation. Refer to the  {@link gl:lightModelf/2}  reference page for a discussion
-%% of color index lighting. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMaterial.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMaterial.xml">external</a> documentation.
 -spec materialf(Face, Pname, Param) -> 'ok' when Face :: enum(),Pname :: enum(),Param :: float().
 materialf(Face,Pname,Param) ->
   cast(5215, <<Face:?GLenum,Pname:?GLenum,Param:?GLfloat>>).
@@ -4573,46 +2185,7 @@ materialiv(Face,Pname,Params) ->
 %% ``gl:getMaterial'' returns in  `Params'  the value or values of parameter  `Pname' 
 %%  of material  `Face' . Six parameters are defined: 
 %%
-%% `?GL_AMBIENT':  `Params'  returns four integer or floating-point values representing
-%% the ambient reflectance of the material. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value is (0.2, 0.2, 0.2, 1.0) 
-%%
-%% `?GL_DIFFUSE':  `Params'  returns four integer or floating-point values representing
-%% the diffuse reflectance of the material. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value is (0.8, 0.8, 0.8, 1.0). 
-%%
-%% `?GL_SPECULAR':  `Params'  returns four integer or floating-point values representing
-%% the specular reflectance of the material. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value is (0, 0, 0, 1). 
-%%
-%% `?GL_EMISSION':  `Params'  returns four integer or floating-point values representing
-%% the emitted light intensity of the material. Integer values, when requested, are linearly
-%% mapped from the internal floating-point representation such that 1.0 maps to the most
-%% positive representable integer value, and   -1.0 maps to the most negative representable
-%% integer value. If the internal value is outside the range  [-1 1], the corresponding integer
-%% return value is undefined. The initial value is (0, 0, 0, 1). 
-%%
-%% `?GL_SHININESS':  `Params'  returns one integer or floating-point value representing
-%% the specular exponent of the material. Integer values, when requested, are computed by
-%% rounding the internal floating-point value to the nearest integer value. The initial value
-%% is 0. 
-%%
-%% `?GL_COLOR_INDEXES':  `Params'  returns three integer or floating-point values
-%% representing the ambient, diffuse, and specular indices of the material. These indices
-%% are used only for color index lighting. (All the other parameters are used only for RGBA
-%% lighting.) Integer values, when requested, are computed by rounding the internal floating-point
-%% values to the nearest integer values. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetMaterial.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetMaterial.xml">external</a> documentation.
 -spec getMaterialfv(Face, Pname) -> {float(),float(),float(),float()} when Face :: enum(),Pname :: enum().
 getMaterialfv(Face,Pname) ->
   call(5219, <<Face:?GLenum,Pname:?GLenum>>).
@@ -4629,11 +2202,7 @@ getMaterialiv(Face,Pname) ->
 %%  is enabled, the material parameter or parameters specified by  `Mode' , of the material
 %% or materials specified by  `Face' , track the current color at all times. 
 %%
-%%  To enable and disable `?GL_COLOR_MATERIAL', call  {@link gl:enable/1}  and  {@link gl:enable/1} 
-%%  with argument `?GL_COLOR_MATERIAL'. `?GL_COLOR_MATERIAL' is initially disabled.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorMaterial.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glColorMaterial.xml">external</a> documentation.
 -spec colorMaterial(Face, Mode) -> 'ok' when Face :: enum(),Mode :: enum().
 colorMaterial(Face,Mode) ->
   cast(5221, <<Face:?GLenum,Mode:?GLenum>>).
@@ -4645,17 +2214,7 @@ colorMaterial(Face,Mode) ->
 %% position, and a given element is in the   mth row and   nth column of the pixel rectangle,
 %% then pixels whose centers are in the rectangle with corners at 
 %%
-%%  ( xr+n. xfactor,   yr+m. yfactor) 
-%%
-%%  ( xr+(n+1). xfactor,   yr+(m+1). yfactor) 
-%%
-%%  are candidates for replacement. Any pixel whose center lies on the bottom or left edge
-%% of this rectangular region is also modified. 
-%%
-%%  Pixel zoom factors are not limited to positive values. Negative zoom factors reflect
-%% the resulting image about the current raster position. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPixelZoom.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPixelZoom.xml">external</a> documentation.
 -spec pixelZoom(Xfactor, Yfactor) -> 'ok' when Xfactor :: float(),Yfactor :: float().
 pixelZoom(Xfactor,Yfactor) ->
   cast(5222, <<Xfactor:?GLfloat,Yfactor:?GLfloat>>).
@@ -4669,181 +2228,7 @@ pixelZoom(Xfactor,Yfactor) ->
 %% ,  {@link gl:compressedTexSubImage1D/7} ,  {@link gl:compressedTexSubImage2D/9}  or  {@link gl:compressedTexSubImage1D/7} 
 %% . 
 %%
-%%  `Pname'  is a symbolic constant indicating the parameter to be set, and  `Param' 
-%% is the new value. Six of the twelve storage parameters affect how pixel data is returned
-%% to client memory. They are as follows: 
-%%
-%% `?GL_PACK_SWAP_BYTES':  If true, byte ordering for multibyte color components, depth
-%% components, or stencil indices is reversed. That is, if a four-byte component consists
-%% of bytes  b 0,  b 1,  b 2,  b 3, it is stored in memory as  b 3,  b 2,  b 1,  b 0 if `?GL_PACK_SWAP_BYTES'
-%%  is true. `?GL_PACK_SWAP_BYTES' has no effect on the memory order of components within
-%% a pixel, only on the order of bytes within components or indices. For example, the three
-%% components of a `?GL_RGB' format pixel are always stored with red first, green second,
-%% and blue third, regardless of the value of `?GL_PACK_SWAP_BYTES'. 
-%%
-%% `?GL_PACK_LSB_FIRST':  If true, bits are ordered within a byte from least significant
-%% to most significant; otherwise, the first bit in each byte is the most significant one. 
-%%
-%% `?GL_PACK_ROW_LENGTH':  If greater than 0, `?GL_PACK_ROW_LENGTH' defines the
-%% number of pixels in a row. If the first pixel of a row is placed at location   p in memory,
-%% then the location of the first pixel of the next row is obtained by skipping 
-%%
-%%  k={n  l(a/s) |(s  n  l)/a|  s&gt;= a s&lt; a)
-%%
-%%  components or indices, where   n is the number of components or indices in a pixel,  l
-%% is the number of pixels in a row (`?GL_PACK_ROW_LENGTH' if it is greater than 0,
-%% the   width argument to the pixel routine otherwise),  a is the value of `?GL_PACK_ALIGNMENT'
-%% , and  s is the size, in bytes, of a single component (if   a&lt; s, then it is as if   a=
-%% s). In the case of 1-bit values, the location of the next row is obtained by skipping 
-%%
-%%  k=8  a |(n  l)/(8  a)|
-%%
-%%  components or indices. 
-%%
-%%  The word `component' in this description refers to the nonindex values red, green,
-%% blue, alpha, and depth. Storage format `?GL_RGB', for example, has three components
-%% per pixel: first red, then green, and finally blue. 
-%%
-%% `?GL_PACK_IMAGE_HEIGHT':  If greater than 0, `?GL_PACK_IMAGE_HEIGHT' defines
-%% the number of pixels in an image three-dimensional texture volume, where ``image'' is
-%% defined by all pixels sharing the same third dimension index. If the first pixel of a
-%% row is placed at location   p in memory, then the location of the first pixel of the next
-%% row is obtained by skipping 
-%%
-%%  k={n  l  h(a/s) |(s  n  l  h)/a|  s&gt;= a s&lt; a)
-%%
-%%  components or indices, where   n is the number of components or indices in a pixel,   l
-%% is the number of pixels in a row (`?GL_PACK_ROW_LENGTH' if it is greater than 0,
-%% the  width argument to  {@link gl:texImage3D/10}  otherwise),   h is the number of rows in
-%% a pixel image (`?GL_PACK_IMAGE_HEIGHT' if it is greater than 0, the   height argument
-%% to the  {@link gl:texImage3D/10}  routine otherwise),  a is the value of `?GL_PACK_ALIGNMENT'
-%% , and   s is the size, in bytes, of a single component (if   a&lt; s, then it is as if  
-%% a=s). 
-%%
-%%  The word `component' in this description refers to the nonindex values red, green,
-%% blue, alpha, and depth. Storage format `?GL_RGB', for example, has three components
-%% per pixel: first red, then green, and finally blue. 
-%%
-%% `?GL_PACK_SKIP_PIXELS', `?GL_PACK_SKIP_ROWS', and `?GL_PACK_SKIP_IMAGES'
-%%
-%%  These values are provided as a convenience to the programmer; they provide no functionality
-%% that cannot be duplicated simply by incrementing the pointer passed to  {@link gl:readPixels/7} 
-%% . Setting `?GL_PACK_SKIP_PIXELS' to   i is equivalent to incrementing the pointer
-%% by   i  n components or indices, where   n is the number of components or indices in each
-%% pixel. Setting `?GL_PACK_SKIP_ROWS' to   j is equivalent to incrementing the pointer
-%% by   j  m components or indices, where   m is the number of components or indices per
-%% row, as just computed in the `?GL_PACK_ROW_LENGTH' section. Setting `?GL_PACK_SKIP_IMAGES'
-%%  to   k is equivalent to incrementing the pointer by   k  p, where   p is the number of
-%% components or indices per image, as computed in the `?GL_PACK_IMAGE_HEIGHT' section.
-%% 
-%%
-%% `?GL_PACK_ALIGNMENT':  Specifies the alignment requirements for the start of each
-%% pixel row in memory. The allowable values are 1 (byte-alignment), 2 (rows aligned to even-numbered
-%% bytes), 4 (word-alignment), and 8 (rows start on double-word boundaries). 
-%%
-%%  The other six of the twelve storage parameters affect how pixel data is read from client
-%% memory. These values are significant for  {@link gl:texImage1D/8} ,  {@link gl:texImage2D/9} ,  {@link gl:texImage3D/10} 
-%% ,  {@link gl:texSubImage1D/7} ,  {@link gl:texSubImage1D/7} , and  {@link gl:texSubImage1D/7} 
-%%
-%%  They are as follows: 
-%%
-%% `?GL_UNPACK_SWAP_BYTES':  If true, byte ordering for multibyte color components,
-%% depth components, or stencil indices is reversed. That is, if a four-byte component consists
-%% of bytes  b 0,  b 1,  b 2,  b 3, it is taken from memory as  b 3,  b 2,  b 1,  b 0 if `?GL_UNPACK_SWAP_BYTES'
-%%  is true. `?GL_UNPACK_SWAP_BYTES' has no effect on the memory order of components
-%% within a pixel, only on the order of bytes within components or indices. For example,
-%% the three components of a `?GL_RGB' format pixel are always stored with red first,
-%% green second, and blue third, regardless of the value of `?GL_UNPACK_SWAP_BYTES'. 
-%%
-%% `?GL_UNPACK_LSB_FIRST':  If true, bits are ordered within a byte from least significant
-%% to most significant; otherwise, the first bit in each byte is the most significant one. 
-%%
-%% `?GL_UNPACK_ROW_LENGTH':  If greater than 0, `?GL_UNPACK_ROW_LENGTH' defines
-%% the number of pixels in a row. If the first pixel of a row is placed at location   p in
-%% memory, then the location of the first pixel of the next row is obtained by skipping 
-%%
-%%  k={n  l(a/s) |(s  n  l)/a|  s&gt;= a s&lt; a)
-%%
-%%  components or indices, where   n is the number of components or indices in a pixel,  l
-%% is the number of pixels in a row (`?GL_UNPACK_ROW_LENGTH' if it is greater than 0,
-%% the   width argument to the pixel routine otherwise),  a is the value of `?GL_UNPACK_ALIGNMENT'
-%% , and  s is the size, in bytes, of a single component (if   a&lt; s, then it is as if   a=
-%% s). In the case of 1-bit values, the location of the next row is obtained by skipping 
-%%
-%%  k=8  a |(n  l)/(8  a)|
-%%
-%%  components or indices. 
-%%
-%%  The word `component' in this description refers to the nonindex values red, green,
-%% blue, alpha, and depth. Storage format `?GL_RGB', for example, has three components
-%% per pixel: first red, then green, and finally blue. 
-%%
-%% `?GL_UNPACK_IMAGE_HEIGHT':  If greater than 0, `?GL_UNPACK_IMAGE_HEIGHT' defines
-%% the number of pixels in an image of a three-dimensional texture volume. Where ``image''
-%% is defined by all pixel sharing the same third dimension index. If the first pixel of
-%% a row is placed at location   p in memory, then the location of the first pixel of the
-%% next row is obtained by skipping 
-%%
-%%  k={n  l  h(a/s) |(s  n  l  h)/a|  s&gt;= a s&lt; a)
-%%
-%%  components or indices, where   n is the number of components or indices in a pixel,  l
-%% is the number of pixels in a row (`?GL_UNPACK_ROW_LENGTH' if it is greater than 0,
-%% the   width argument to  {@link gl:texImage3D/10}  otherwise),  h is the number of rows in
-%% an image (`?GL_UNPACK_IMAGE_HEIGHT' if it is greater than 0, the   height argument
-%% to  {@link gl:texImage3D/10}  otherwise),  a is the value of `?GL_UNPACK_ALIGNMENT',
-%% and  s is the size, in bytes, of a single component (if   a&lt; s, then it is as if   a=s).
-%% 
-%%
-%%  The word `component' in this description refers to the nonindex values red, green,
-%% blue, alpha, and depth. Storage format `?GL_RGB', for example, has three components
-%% per pixel: first red, then green, and finally blue. 
-%%
-%% `?GL_UNPACK_SKIP_PIXELS' and `?GL_UNPACK_SKIP_ROWS'
-%%
-%%  These values are provided as a convenience to the programmer; they provide no functionality
-%% that cannot be duplicated by incrementing the pointer passed to  {@link gl:texImage1D/8} ,  {@link gl:texImage2D/9} 
-%% ,  {@link gl:texSubImage1D/7}  or  {@link gl:texSubImage1D/7} . Setting `?GL_UNPACK_SKIP_PIXELS'
-%%  to   i is equivalent to incrementing the pointer by   i  n components or indices, where
-%%   n is the number of components or indices in each pixel. Setting `?GL_UNPACK_SKIP_ROWS'
-%%  to   j is equivalent to incrementing the pointer by   j  k components or indices, where
-%%   k is the number of components or indices per row, as just computed in the `?GL_UNPACK_ROW_LENGTH'
-%%  section. 
-%%
-%% `?GL_UNPACK_ALIGNMENT':  Specifies the alignment requirements for the start of each
-%% pixel row in memory. The allowable values are 1 (byte-alignment), 2 (rows aligned to even-numbered
-%% bytes), 4 (word-alignment), and 8 (rows start on double-word boundaries). 
-%%
-%%  The following table gives the type, initial value, and range of valid values for each
-%% storage parameter that can be set with ``gl:pixelStore''. 
-%%
-%% <table><tbody><tr><td> `Pname' </td><td>` Type '</td><td>` Initial Value '</td>
-%% <td>` Valid Range '</td></tr></tbody><tbody><tr><td>`?GL_PACK_SWAP_BYTES'</td><td>
-%%  boolean </td><td> false </td><td> true or false </td></tr><tr><td>`?GL_PACK_LSB_FIRST'
-%% </td><td> boolean </td><td> false </td><td> true or false </td></tr><tr><td>`?GL_PACK_ROW_LENGTH'
-%% </td><td> integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_PACK_IMAGE_HEIGHT'</td>
-%% <td> integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_PACK_SKIP_ROWS'</td><td>
-%% integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_PACK_SKIP_PIXELS'</td><td> integer
-%% </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_PACK_SKIP_IMAGES'</td><td> integer </td><td>
-%%  0 </td><td>[0)</td></tr><tr><td>`?GL_PACK_ALIGNMENT'</td><td> integer </td><td> 4 </td>
-%% <td> 1, 2, 4, or 8 </td></tr><tr><td>`?GL_UNPACK_SWAP_BYTES'</td><td> boolean </td><td>
-%%  false </td><td> true or false </td></tr><tr><td>`?GL_UNPACK_LSB_FIRST'</td><td>
-%% boolean </td><td> false </td><td> true or false </td></tr><tr><td>`?GL_UNPACK_ROW_LENGTH'
-%% </td><td> integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_UNPACK_IMAGE_HEIGHT'</td>
-%% <td> integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_UNPACK_SKIP_ROWS'</td><td>
-%% integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_UNPACK_SKIP_PIXELS'</td><td>
-%% integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_UNPACK_SKIP_IMAGES'</td><td>
-%% integer </td><td> 0 </td><td>[0)</td></tr><tr><td>`?GL_UNPACK_ALIGNMENT'</td><td> integer
-%% </td><td> 4 </td><td> 1, 2, 4, or 8 </td></tr></tbody></table>
-%%
-%% ``gl:pixelStoref'' can be used to set any pixel store parameter. If the parameter type
-%% is boolean, then if  `Param'  is 0, the parameter is false; otherwise it is set to
-%% true. If  `Pname'  is a integer type parameter,  `Param'  is rounded to the nearest
-%% integer. 
-%%
-%%  Likewise, ``gl:pixelStorei'' can also be used to set any of the pixel store parameters.
-%% Boolean parameters are set to false if  `Param'  is 0 and true otherwise. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPixelStore.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPixelStore.xhtml">external</a> documentation.
 -spec pixelStoref(Pname, Param) -> 'ok' when Pname :: enum(),Param :: float().
 pixelStoref(Pname,Param) ->
   cast(5223, <<Pname:?GLenum,Param:?GLfloat>>).
@@ -4874,134 +2259,7 @@ pixelStorei(Pname,Param) ->
 %% ) control the unpacking of pixels being read from client memory and the packing of pixels
 %% being written back into client memory. 
 %%
-%%  Pixel transfer operations handle four fundamental pixel types: `color', `color index'
-%% , `depth', and `stencil'. `Color' pixels consist of four floating-point
-%% values with unspecified mantissa and exponent sizes, scaled such that 0 represents zero
-%% intensity and 1 represents full intensity. `Color indices' comprise a single fixed-point
-%% value, with unspecified precision to the right of the binary point. `Depth' pixels
-%% comprise a single floating-point value, with unspecified mantissa and exponent sizes,
-%% scaled such that 0.0 represents the minimum depth buffer value, and 1.0 represents the
-%% maximum depth buffer value. Finally, `stencil' pixels comprise a single fixed-point
-%% value, with unspecified precision to the right of the binary point. 
-%%
-%%  The pixel transfer operations performed on the four basic pixel types are as follows: 
-%%
-%% `Color':  Each of the four color components is multiplied by a scale factor, then
-%% added to a bias factor. That is, the red component is multiplied by `?GL_RED_SCALE',
-%% then added to `?GL_RED_BIAS'; the green component is multiplied by `?GL_GREEN_SCALE'
-%% , then added to `?GL_GREEN_BIAS'; the blue component is multiplied by `?GL_BLUE_SCALE'
-%% , then added to `?GL_BLUE_BIAS'; and the alpha component is multiplied by `?GL_ALPHA_SCALE'
-%% , then added to `?GL_ALPHA_BIAS'. After all four color components are scaled and
-%% biased, each is clamped to the range  [0 1]. All color, scale, and bias values are specified
-%% with ``gl:pixelTransfer''. 
-%%
-%%  If `?GL_MAP_COLOR' is true, each color component is scaled by the size of the corresponding
-%% color-to-color map, then replaced by the contents of that map indexed by the scaled component.
-%% That is, the red component is scaled by `?GL_PIXEL_MAP_R_TO_R_SIZE', then replaced
-%% by the contents of `?GL_PIXEL_MAP_R_TO_R' indexed by itself. The green component
-%% is scaled by `?GL_PIXEL_MAP_G_TO_G_SIZE', then replaced by the contents of `?GL_PIXEL_MAP_G_TO_G'
-%%  indexed by itself. The blue component is scaled by `?GL_PIXEL_MAP_B_TO_B_SIZE',
-%% then replaced by the contents of `?GL_PIXEL_MAP_B_TO_B' indexed by itself. And the
-%% alpha component is scaled by `?GL_PIXEL_MAP_A_TO_A_SIZE', then replaced by the contents
-%% of `?GL_PIXEL_MAP_A_TO_A' indexed by itself. All components taken from the maps are
-%% then clamped to the range  [0 1]. `?GL_MAP_COLOR' is specified with ``gl:pixelTransfer''.
-%% The contents of the various maps are specified with  {@link gl:pixelMapfv/3} . 
-%%
-%%  If the ARB_imaging extension is supported, each of the four color components may be scaled
-%% and biased after transformation by the color matrix. That is, the red component is multiplied
-%% by `?GL_POST_COLOR_MATRIX_RED_SCALE', then added to `?GL_POST_COLOR_MATRIX_RED_BIAS'
-%% ; the green component is multiplied by `?GL_POST_COLOR_MATRIX_GREEN_SCALE', then
-%% added to `?GL_POST_COLOR_MATRIX_GREEN_BIAS'; the blue component is multiplied by `?GL_POST_COLOR_MATRIX_BLUE_SCALE'
-%% , then added to `?GL_POST_COLOR_MATRIX_BLUE_BIAS'; and the alpha component is multiplied
-%% by `?GL_POST_COLOR_MATRIX_ALPHA_SCALE', then added to `?GL_POST_COLOR_MATRIX_ALPHA_BIAS'
-%% . After all four color components are scaled and biased, each is clamped to the range  [0
-%% 1]. 
-%%
-%%  Similarly, if the ARB_imaging extension is supported, each of the four color components
-%% may be scaled and biased after processing by the enabled convolution filter. That is,
-%% the red component is multiplied by `?GL_POST_CONVOLUTION_RED_SCALE', then added to `?GL_POST_CONVOLUTION_RED_BIAS'
-%% ; the green component is multiplied by `?GL_POST_CONVOLUTION_GREEN_SCALE', then added
-%% to `?GL_POST_CONVOLUTION_GREEN_BIAS'; the blue component is multiplied by `?GL_POST_CONVOLUTION_BLUE_SCALE'
-%% , then added to `?GL_POST_CONVOLUTION_BLUE_BIAS'; and the alpha component is multiplied
-%% by `?GL_POST_CONVOLUTION_ALPHA_SCALE', then added to `?GL_POST_CONVOLUTION_ALPHA_BIAS'
-%% . After all four color components are scaled and biased, each is clamped to the range  [0
-%% 1]. 
-%%
-%% `Color index':  Each color index is shifted left by `?GL_INDEX_SHIFT' bits;
-%% any bits beyond the number of fraction bits carried by the fixed-point index are filled
-%% with zeros. If `?GL_INDEX_SHIFT' is negative, the shift is to the right, again zero
-%% filled. Then `?GL_INDEX_OFFSET' is added to the index. `?GL_INDEX_SHIFT' and `?GL_INDEX_OFFSET'
-%%  are specified with ``gl:pixelTransfer''. 
-%%
-%%  From this point, operation diverges depending on the required format of the resulting
-%% pixels. If the resulting pixels are to be written to a color index buffer, or if they
-%% are being read back to client memory in `?GL_COLOR_INDEX' format, the pixels continue
-%% to be treated as indices. If `?GL_MAP_COLOR' is true, each index is masked by   2 n-1
-%% , where   n is `?GL_PIXEL_MAP_I_TO_I_SIZE', then replaced by the contents of `?GL_PIXEL_MAP_I_TO_I'
-%%  indexed by the masked value. `?GL_MAP_COLOR' is specified with ``gl:pixelTransfer''
-%% . The contents of the index map is specified with  {@link gl:pixelMapfv/3} . 
-%%
-%%  If the resulting pixels are to be written to an RGBA color buffer, or if they are read
-%% back to client memory in a format other than `?GL_COLOR_INDEX', the pixels are converted
-%% from indices to colors by referencing the four maps `?GL_PIXEL_MAP_I_TO_R', `?GL_PIXEL_MAP_I_TO_G'
-%% , `?GL_PIXEL_MAP_I_TO_B', and `?GL_PIXEL_MAP_I_TO_A'. Before being dereferenced,
-%% the index is masked by   2 n-1, where   n is `?GL_PIXEL_MAP_I_TO_R_SIZE' for the
-%% red map, `?GL_PIXEL_MAP_I_TO_G_SIZE' for the green map, `?GL_PIXEL_MAP_I_TO_B_SIZE'
-%%  for the blue map, and `?GL_PIXEL_MAP_I_TO_A_SIZE' for the alpha map. All components
-%% taken from the maps are then clamped to the range  [0 1]. The contents of the four maps is
-%% specified with  {@link gl:pixelMapfv/3} . 
-%%
-%% `Depth':  Each depth value is multiplied by `?GL_DEPTH_SCALE', added to `?GL_DEPTH_BIAS'
-%% , then clamped to the range  [0 1]. 
-%%
-%% `Stencil':  Each index is shifted `?GL_INDEX_SHIFT' bits just as a color index
-%% is, then added to `?GL_INDEX_OFFSET'. If `?GL_MAP_STENCIL' is true, each index
-%% is masked by   2 n-1, where   n is `?GL_PIXEL_MAP_S_TO_S_SIZE', then replaced by
-%% the contents of `?GL_PIXEL_MAP_S_TO_S' indexed by the masked value. 
-%%
-%%  The following table gives the type, initial value, and range of valid values for each
-%% of the pixel transfer parameters that are set with ``gl:pixelTransfer''. 
-%%
-%% <table><tbody><tr><td> `Pname' </td><td>` Type '</td><td>` Initial Value '</td>
-%% <td>` Valid Range '</td></tr></tbody><tbody><tr><td>`?GL_MAP_COLOR'</td><td>
-%% boolean </td><td> false </td><td> true/false </td></tr><tr><td>`?GL_MAP_STENCIL'</td>
-%% <td> boolean </td><td> false </td><td> true/false </td></tr><tr><td>`?GL_INDEX_SHIFT'</td>
-%% <td> integer </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_INDEX_OFFSET'</td><td> integer
-%% </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_RED_SCALE'</td><td> float </td><td> 1 </td>
-%% <td>(-)</td></tr><tr><td>`?GL_GREEN_SCALE'</td><td> float </td><td> 1 </td><td>(-)</td></tr>
-%% <tr><td>`?GL_BLUE_SCALE'</td><td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_ALPHA_SCALE'
-%% </td><td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_DEPTH_SCALE'</td><td>
-%% float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_RED_BIAS'</td><td> float </td><td>
-%% 0 </td><td>(-)</td></tr><tr><td>`?GL_GREEN_BIAS'</td><td> float </td><td> 0 </td><td>(-)</td>
-%% </tr><tr><td>`?GL_BLUE_BIAS'</td><td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_ALPHA_BIAS'
-%% </td><td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_DEPTH_BIAS'</td><td>
-%% float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_RED_SCALE'</td><td>
-%%  float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_GREEN_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_BLUE_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_ALPHA_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_RED_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_GREEN_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_BLUE_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_COLOR_MATRIX_ALPHA_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_RED_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_GREEN_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_BLUE_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_ALPHA_SCALE'</td>
-%% <td> float </td><td> 1 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_RED_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_GREEN_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_BLUE_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr><tr><td>`?GL_POST_CONVOLUTION_ALPHA_BIAS'</td>
-%% <td> float </td><td> 0 </td><td>(-)</td></tr></tbody></table>
-%%
-%% ``gl:pixelTransferf'' can be used to set any pixel transfer parameter. If the parameter
-%% type is boolean, 0 implies false and any other value implies true. If  `Pname'  is
-%% an integer parameter,  `Param'  is rounded to the nearest integer. 
-%%
-%%  Likewise, ``gl:pixelTransferi'' can be used to set any of the pixel transfer parameters.
-%% Boolean parameters are set to false if  `Param'  is 0 and to true otherwise.  `Param' 
-%%  is converted to floating point before being assigned to real-valued parameters. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPixelTransfer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPixelTransfer.xml">external</a> documentation.
 -spec pixelTransferf(Pname, Param) -> 'ok' when Pname :: enum(),Param :: float().
 pixelTransferf(Pname,Param) ->
   cast(5225, <<Pname:?GLenum,Param:?GLfloat>>).
@@ -5025,72 +2283,7 @@ pixelTransferi(Pname,Param) ->
 %% page, and partly in the reference pages for the pixel and texture image commands. Only
 %% the specification of the maps is described in this reference page. 
 %%
-%%  `Map'  is a symbolic map name, indicating one of ten maps to set.  `Mapsize'  specifies
-%% the number of entries in the map, and  `Values'  is a pointer to an array of  `Mapsize' 
-%%  map values. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a pixel transfer map is specified,  `Values'  is
-%% treated as a byte offset into the buffer object's data store. 
-%%
-%%  The ten maps are as follows: 
-%%
-%% `?GL_PIXEL_MAP_I_TO_I':  Maps color indices to color indices. 
-%%
-%% `?GL_PIXEL_MAP_S_TO_S':  Maps stencil indices to stencil indices. 
-%%
-%% `?GL_PIXEL_MAP_I_TO_R':  Maps color indices to red components. 
-%%
-%% `?GL_PIXEL_MAP_I_TO_G':  Maps color indices to green components. 
-%%
-%% `?GL_PIXEL_MAP_I_TO_B':  Maps color indices to blue components. 
-%%
-%% `?GL_PIXEL_MAP_I_TO_A':  Maps color indices to alpha components. 
-%%
-%% `?GL_PIXEL_MAP_R_TO_R':  Maps red components to red components. 
-%%
-%% `?GL_PIXEL_MAP_G_TO_G':  Maps green components to green components. 
-%%
-%% `?GL_PIXEL_MAP_B_TO_B':  Maps blue components to blue components. 
-%%
-%% `?GL_PIXEL_MAP_A_TO_A':  Maps alpha components to alpha components. 
-%%
-%%  The entries in a map can be specified as single-precision floating-point numbers, unsigned
-%% short integers, or unsigned int integers. Maps that store color component values (all
-%% but `?GL_PIXEL_MAP_I_TO_I' and `?GL_PIXEL_MAP_S_TO_S') retain their values in
-%% floating-point format, with unspecified mantissa and exponent sizes. Floating-point values
-%% specified by ``gl:pixelMapfv'' are converted directly to the internal floating-point
-%% format of these maps, then clamped to the range [0,1]. Unsigned integer values specified
-%% by ``gl:pixelMapusv'' and ``gl:pixelMapuiv'' are converted linearly such that the
-%% largest representable integer maps to 1.0, and 0 maps to 0.0. 
-%%
-%%  Maps that store indices, `?GL_PIXEL_MAP_I_TO_I' and `?GL_PIXEL_MAP_S_TO_S',
-%% retain their values in fixed-point format, with an unspecified number of bits to the right
-%% of the binary point. Floating-point values specified by ``gl:pixelMapfv'' are converted
-%% directly to the internal fixed-point format of these maps. Unsigned integer values specified
-%% by ``gl:pixelMapusv'' and ``gl:pixelMapuiv'' specify integer values, with all 0's
-%% to the right of the binary point. 
-%%
-%%  The following table shows the initial sizes and values for each of the maps. Maps that
-%% are indexed by either color or stencil indices must have  `Mapsize'  =   2 n for some
-%%   n or the results are undefined. The maximum allowable size for each map depends on the
-%% implementation and can be determined by calling  {@link gl:getBooleanv/1}  with argument `?GL_MAX_PIXEL_MAP_TABLE'
-%% . The single maximum applies to all maps; it is at least 32. <table><tbody><tr><td> `Map' 
-%% </td><td>` Lookup Index '</td><td>` Lookup Value '</td><td>` Initial Size '</td>
-%% <td>` Initial Value '</td></tr></tbody><tbody><tr><td>`?GL_PIXEL_MAP_I_TO_I'</td>
-%% <td> color index </td><td> color index </td><td> 1 </td><td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_S_TO_S'
-%% </td><td> stencil index  </td><td> stencil index  </td><td> 1 </td><td> 0 </td></tr><tr><td>
-%% `?GL_PIXEL_MAP_I_TO_R'</td><td> color index  </td><td> R </td><td> 1 </td><td> 0 </td>
-%% </tr><tr><td>`?GL_PIXEL_MAP_I_TO_G'</td><td> color index  </td><td> G </td><td> 1 </td>
-%% <td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_I_TO_B'</td><td> color index </td><td> B </td>
-%% <td> 1 </td><td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_I_TO_A'</td><td> color index </td>
-%% <td> A </td><td> 1 </td><td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_R_TO_R'</td><td> R </td>
-%% <td> R </td><td> 1 </td><td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_G_TO_G'</td><td> G </td>
-%% <td> G </td><td> 1 </td><td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_B_TO_B'</td><td> B </td>
-%% <td> B </td><td> 1 </td><td> 0 </td></tr><tr><td>`?GL_PIXEL_MAP_A_TO_A'</td><td> A </td>
-%% <td> A </td><td> 1 </td><td> 0 </td></tr></tbody></table>
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPixelMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPixelMap.xml">external</a> documentation.
 -spec pixelMapfv(Map, Mapsize, Values) -> 'ok' when Map :: enum(),Mapsize :: integer(),Values :: binary().
 pixelMapfv(Map,Mapsize,Values) ->
   send_bin(Values),
@@ -5121,19 +2314,7 @@ pixelMapusv(Map,Mapsize,Values) ->
 %% , and  {@link gl:copyTexSubImage3D/9} . to map color indices, stencil indices, color components,
 %% and depth components to other values. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a pixel map is requested,  `Data'  is treated as
-%% a byte offset into the buffer object's data store. 
-%%
-%%  Unsigned integer values, if requested, are linearly mapped from the internal fixed or
-%% floating-point representation such that 1.0 maps to the largest representable integer
-%% value, and 0.0 maps to 0. Return unsigned integer values are undefined if the map value
-%% was not in the range [0,1]. 
-%%
-%%  To determine the required size of  `Map' , call  {@link gl:getBooleanv/1}  with the appropriate
-%% symbolic constant. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetPixelMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetPixelMap.xml">external</a> documentation.
 -spec getPixelMapfv(Map, Values) -> 'ok' when Map :: enum(),Values :: mem().
 getPixelMapfv(Map,Values) ->
   send_bin(Values),
@@ -5160,42 +2341,7 @@ getPixelMapusv(Map,Values) ->
 %% using the current raster color or index. Frame buffer pixels corresponding to 0's in the
 %% bitmap are not modified. 
 %%
-%% ``gl:bitmap'' takes seven arguments. The first pair specifies the width and height of
-%% the bitmap image. The second pair specifies the location of the bitmap origin relative
-%% to the lower left corner of the bitmap image. The third pair of arguments specifies `x'
-%%  and `y' offsets to be added to the current raster position after the bitmap has
-%% been drawn. The final argument is a pointer to the bitmap image itself. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a bitmap image is specified,  `Bitmap'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  The bitmap image is interpreted like image data for the  {@link gl:drawPixels/5}  command,
-%% with  `Width'  and  `Height'  corresponding to the width and height arguments of
-%% that command, and with `type' set to `?GL_BITMAP' and `format' set to `?GL_COLOR_INDEX'
-%% . Modes specified using  {@link gl:pixelStoref/2}  affect the interpretation of bitmap image
-%% data; modes specified using  {@link gl:pixelTransferf/2}  do not. 
-%%
-%%  If the current raster position is invalid, ``gl:bitmap'' is ignored. Otherwise, the
-%% lower left corner of the bitmap image is positioned at the window coordinates 
-%%
-%%  x w=|x r-x o|
-%%
-%%  y w=|y r-y o|
-%%
-%%  where  (x r y r) is the raster position and  (x o y o) is the bitmap origin. Fragments are then generated
-%% for each pixel corresponding to a 1 (one) in the bitmap image. These fragments are generated
-%% using the current raster `z' coordinate, color or color index, and current raster
-%% texture coordinates. They are then treated just as if they had been generated by a point,
-%% line, or polygon, including texture mapping, fogging, and all per-fragment operations
-%% such as alpha and depth testing. 
-%%
-%%  After the bitmap has been drawn, the `x' and `y' coordinates of the current
-%% raster position are offset by  `Xmove'  and  `Ymove' . No change is made to the `z'
-%%  coordinate of the current raster position, or to the current raster color, texture coordinates,
-%% or index. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBitmap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glBitmap.xml">external</a> documentation.
 -spec bitmap(Width, Height, Xorig, Yorig, Xmove, Ymove, Bitmap) -> 'ok' when Width :: integer(),Height :: integer(),Xorig :: float(),Yorig :: float(),Xmove :: float(),Ymove :: float(),Bitmap :: offset()|mem().
 bitmap(Width,Height,Xorig,Yorig,Xmove,Ymove,Bitmap) when  is_integer(Bitmap) ->
   cast(5233, <<Width:?GLsizei,Height:?GLsizei,Xorig:?GLfloat,Yorig:?GLfloat,Xmove:?GLfloat,Ymove:?GLfloat,Bitmap:?GLuint>>);
@@ -5212,91 +2358,7 @@ bitmap(Width,Height,Xorig,Yorig,Xmove,Ymove,Bitmap) ->
 %% This reference page describes the effects on ``gl:readPixels'' of most, but not all
 %% of the parameters specified by these three commands. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a block of pixels is requested,  `Data'  is treated
-%% as a byte offset into the buffer object's data store rather than a pointer to client memory.
-%% 
-%%
-%% ``gl:readPixels'' returns values from each pixel with lower left corner at (x+i y+j) for   0&lt;=
-%%  i&lt; width and  0&lt;= j&lt; height. This pixel is said to be the   ith pixel in the  
-%% jth row. Pixels are returned in row order from the lowest to the highest row, left to
-%% right in each row. 
-%%
-%%  `Format'  specifies the format for the returned pixel values; accepted values are: 
-%%
-%% `?GL_STENCIL_INDEX':  Stencil values are read from the stencil buffer. Each index
-%% is converted to fixed point, shifted left or right depending on the value and sign of `?GL_INDEX_SHIFT'
-%% , and added to `?GL_INDEX_OFFSET'. If `?GL_MAP_STENCIL' is `?GL_TRUE',
-%% indices are replaced by their mappings in the table `?GL_PIXEL_MAP_S_TO_S'. 
-%%
-%% `?GL_DEPTH_COMPONENT':  Depth values are read from the depth buffer. Each component
-%% is converted to floating point such that the minimum depth value maps to 0 and the maximum
-%% value maps to 1. Each component is then multiplied by `?GL_DEPTH_SCALE', added to `?GL_DEPTH_BIAS'
-%% , and finally clamped to the range  [0 1]. 
-%%
-%% `?GL_DEPTH_STENCIL':  Values are taken from both the depth and stencil buffers. The  `Type' 
-%%  parameter must be `?GL_UNSIGNED_INT_24_8' or `?GL_FLOAT_32_UNSIGNED_INT_24_8_REV'
-%% . 
-%%
-%% `?GL_RED'
-%%
-%% `?GL_GREEN'
-%%
-%% `?GL_BLUE'
-%%
-%% `?GL_RGB'
-%%
-%% `?GL_BGR'
-%%
-%% `?GL_RGBA'
-%%
-%% `?GL_BGRA':  Finally, the indices or components are converted to the proper format,
-%% as specified by  `Type' . If  `Format'  is `?GL_STENCIL_INDEX' and  `Type' 
-%% is not `?GL_FLOAT', each index is masked with the mask value given in the following
-%% table. If  `Type'  is `?GL_FLOAT', then each integer index is converted to single-precision
-%% floating-point format. 
-%%
-%%  If  `Format'  is `?GL_RED', `?GL_GREEN', `?GL_BLUE', `?GL_RGB', `?GL_BGR'
-%% , `?GL_RGBA', or `?GL_BGRA' and  `Type'  is not `?GL_FLOAT', each component
-%% is multiplied by the multiplier shown in the following table. If type is `?GL_FLOAT',
-%% then each component is passed as is (or converted to the client's single-precision floating-point
-%% format if it is different from the one used by the GL). 
-%%
-%% <table><tbody><tr><td> `Type' </td><td>` Index Mask '</td><td>` Component Conversion '
-%% </td></tr></tbody><tbody><tr><td>`?GL_UNSIGNED_BYTE'</td><td> 2 8-1</td><td>(2 8-1)  c</td></tr>
-%% <tr><td>`?GL_BYTE'</td><td> 2 7-1</td><td>((2 8-1)  c-1)/2</td></tr><tr><td>`?GL_UNSIGNED_SHORT'
-%% </td><td> 2 16-1</td><td>(2 16-1)  c</td></tr><tr><td>`?GL_SHORT'</td><td> 2 15-1</td><td>((2
-%% 16-1) 
-%% c-1)/2</td>
-%% </tr><tr><td>`?GL_UNSIGNED_INT'</td><td> 2 32-1</td><td>(2 32-1)  c</td></tr><tr><td>`?GL_INT'
-%% </td><td> 2 31-1</td><td>((2 32-1)  c-1)/2</td></tr><tr><td>`?GL_HALF_FLOAT'</td><td> none </td><td>
-%%  c</td></tr><tr><td>`?GL_FLOAT'</td><td> none </td><td> c</td></tr><tr><td>`?GL_UNSIGNED_BYTE_3_3_2'
-%% </td><td> 2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_BYTE_2_3_3_REV'</td><td>
-%% 2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_SHORT_5_6_5'</td><td> 2 N-1</td><td>
-%% (2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_SHORT_5_6_5_REV'</td><td> 2 N-1</td><td>(2 N-1)  c</td></tr>
-%% <tr><td>`?GL_UNSIGNED_SHORT_4_4_4_4'</td><td> 2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_SHORT_4_4_4_4_REV'
-%% </td><td> 2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_SHORT_5_5_5_1'</td><td> 2
-%% N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_SHORT_1_5_5_5_REV'</td><td> 2 N-1</td>
-%% <td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_INT_8_8_8_8'</td><td> 2 N-1</td><td>(2 N-1)  c</td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT_8_8_8_8_REV'</td><td> 2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_INT_10_10_10_2'
-%% </td><td> 2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_INT_2_10_10_10_REV'</td><td>
-%%  2 N-1</td><td>(2 N-1)  c</td></tr><tr><td>`?GL_UNSIGNED_INT_24_8'</td><td> 2 N-1</td><td>(2
-%% N-1) 
-%% c</td></tr><tr><td>`?GL_UNSIGNED_INT_10F_11F_11F_REV'</td><td> -- </td><td> Special </td>
-%% </tr><tr><td>`?GL_UNSIGNED_INT_5_9_9_9_REV'</td><td> -- </td><td> Special </td></tr><tr>
-%% <td>`?GL_FLOAT_32_UNSIGNED_INT_24_8_REV'</td><td> none </td><td> c (Depth Only) </td>
-%% </tr></tbody></table>
-%%
-%%  Return values are placed in memory as follows. If  `Format'  is `?GL_STENCIL_INDEX'
-%% , `?GL_DEPTH_COMPONENT', `?GL_RED', `?GL_GREEN', or `?GL_BLUE', a
-%% single value is returned and the data for the   ith pixel in the   jth row is placed in
-%% location  (j)  width+i. `?GL_RGB' and `?GL_BGR' return three values, `?GL_RGBA'
-%%  and `?GL_BGRA' return four values for each pixel, with all values corresponding
-%% to a single pixel occupying contiguous space in  `Data' . Storage parameters set by  {@link gl:pixelStoref/2} 
-%% , such as `?GL_PACK_LSB_FIRST' and `?GL_PACK_SWAP_BYTES', affect the way that
-%% data is written into memory. See  {@link gl:pixelStoref/2}  for a description. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glReadPixels.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glReadPixels.xhtml">external</a> documentation.
 -spec readPixels(X, Y, Width, Height, Format, Type, Pixels) -> 'ok' when X :: integer(),Y :: integer(),Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Pixels :: mem().
 readPixels(X,Y,Width,Height,Format,Type,Pixels) ->
   send_bin(Pixels),
@@ -5311,237 +2373,7 @@ readPixels(X,Y,Width,Height,Format,Type,Pixels) ->
 %% position is valid, and  {@link gl:getBooleanv/1}  with argument `?GL_CURRENT_RASTER_POSITION'
 %% to query the raster position. 
 %%
-%%  Several parameters define the encoding of pixel data in memory and control the processing
-%% of the pixel data before it is placed in the frame buffer. These parameters are set with
-%% four commands:  {@link gl:pixelStoref/2} ,  {@link gl:pixelTransferf/2} ,  {@link gl:pixelMapfv/3} ,
-%% and  {@link gl:pixelZoom/2} . This reference page describes the effects on ``gl:drawPixels''
-%%  of many, but not all, of the parameters specified by these four commands. 
-%%
-%%  Data is read from  `Data'  as a sequence of signed or unsigned bytes, signed or unsigned
-%% shorts, signed or unsigned integers, or single-precision floating-point values, depending
-%% on  `Type' . When  `Type'  is one of `?GL_UNSIGNED_BYTE', `?GL_BYTE', `?GL_UNSIGNED_SHORT'
-%% , `?GL_SHORT', `?GL_UNSIGNED_INT', `?GL_INT', or `?GL_FLOAT' each
-%% of these bytes, shorts, integers, or floating-point values is interpreted as one color
-%% or depth component, or one index, depending on  `Format' . When  `Type'  is one of `?GL_UNSIGNED_BYTE_3_3_2'
-%% , `?GL_UNSIGNED_SHORT_5_6_5', `?GL_UNSIGNED_SHORT_4_4_4_4', `?GL_UNSIGNED_SHORT_5_5_5_1'
-%% , `?GL_UNSIGNED_INT_8_8_8_8', or `?GL_UNSIGNED_INT_10_10_10_2', each unsigned
-%% value is interpreted as containing all the components for a single pixel, with the color
-%% components arranged according to  `Format' . When  `Type'  is one of `?GL_UNSIGNED_BYTE_2_3_3_REV'
-%% , `?GL_UNSIGNED_SHORT_5_6_5_REV', `?GL_UNSIGNED_SHORT_4_4_4_4_REV', `?GL_UNSIGNED_SHORT_1_5_5_5_REV'
-%% , `?GL_UNSIGNED_INT_8_8_8_8_REV', or `?GL_UNSIGNED_INT_2_10_10_10_REV', each
-%% unsigned value is interpreted as containing all color components, specified by  `Format' 
-%% , for a single pixel in a reversed order. Indices are always treated individually. Color
-%% components are treated as groups of one, two, three, or four values, again based on  `Format' 
-%% . Both individual indices and groups of components are referred to as pixels. If  `Type' 
-%%  is `?GL_BITMAP', the data must be unsigned bytes, and  `Format'  must be either `?GL_COLOR_INDEX'
-%%  or `?GL_STENCIL_INDEX'. Each unsigned byte is treated as eight 1-bit pixels, with
-%% bit ordering determined by `?GL_UNPACK_LSB_FIRST' (see  {@link gl:pixelStoref/2} ). 
-%%
-%%  width×height pixels are read from memory, starting at location  `Data' . By default,
-%% these pixels are taken from adjacent memory locations, except that after all  `Width' 
-%% pixels are read, the read pointer is advanced to the next four-byte boundary. The four-byte
-%% row alignment is specified by  {@link gl:pixelStoref/2}  with argument `?GL_UNPACK_ALIGNMENT'
-%% , and it can be set to one, two, four, or eight bytes. Other pixel store parameters specify
-%% different read pointer advancements, both before the first pixel is read and after all  `Width' 
-%%  pixels are read. See the  {@link gl:pixelStoref/2}  reference page for details on these options.
-%% 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a block of pixels is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  The   width×height pixels that are read from memory are each operated on in the same
-%% way, based on the values of several parameters specified by  {@link gl:pixelTransferf/2} 
-%% and  {@link gl:pixelMapfv/3} . The details of these operations, as well as the target buffer
-%% into which the pixels are drawn, are specific to the format of the pixels, as specified
-%% by  `Format' .  `Format'  can assume one of 13 symbolic values: 
-%%
-%% `?GL_COLOR_INDEX':  Each pixel is a single value, a color index. It is converted
-%% to fixed-point format, with an unspecified number of bits to the right of the binary point,
-%% regardless of the memory data type. Floating-point values convert to true fixed-point
-%% values. Signed and unsigned integer data is converted with all fraction bits set to 0.
-%% Bitmap data convert to either 0 or 1. 
-%%
-%%  Each fixed-point index is then shifted left by `?GL_INDEX_SHIFT' bits and added to `?GL_INDEX_OFFSET'
-%% . If `?GL_INDEX_SHIFT' is negative, the shift is to the right. In either case, zero
-%% bits fill otherwise unspecified bit locations in the result. 
-%%
-%%  If the GL is in RGBA mode, the resulting index is converted to an RGBA pixel with the
-%% help of the `?GL_PIXEL_MAP_I_TO_R', `?GL_PIXEL_MAP_I_TO_G', `?GL_PIXEL_MAP_I_TO_B'
-%% , and `?GL_PIXEL_MAP_I_TO_A' tables. If the GL is in color index mode, and if `?GL_MAP_COLOR'
-%%  is true, the index is replaced with the value that it references in lookup table `?GL_PIXEL_MAP_I_TO_I'
-%% . Whether the lookup replacement of the index is done or not, the integer part of the
-%% index is then ANDed with   2 b-1, where   b is the number of bits in a color index buffer.
-%% 
-%%
-%%  The GL then converts the resulting indices or RGBA colors to fragments by attaching the
-%% current raster position `z' coordinate and texture coordinates to each pixel, then
-%% assigning   x and   y window coordinates to the   nth fragment such that  x n=x r+n% width
-%% 
-%%
-%%  y n=y r+|n/width|
-%%
-%%  where  (x r y r) is the current raster position. These pixel fragments are then treated just like
-%% the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog,
-%% and all the fragment operations are applied before the fragments are written to the frame
-%% buffer. 
-%%
-%% `?GL_STENCIL_INDEX':  Each pixel is a single value, a stencil index. It is converted
-%% to fixed-point format, with an unspecified number of bits to the right of the binary point,
-%% regardless of the memory data type. Floating-point values convert to true fixed-point
-%% values. Signed and unsigned integer data is converted with all fraction bits set to 0.
-%% Bitmap data convert to either 0 or 1. 
-%%
-%%  Each fixed-point index is then shifted left by `?GL_INDEX_SHIFT' bits, and added
-%% to `?GL_INDEX_OFFSET'. If `?GL_INDEX_SHIFT' is negative, the shift is to the
-%% right. In either case, zero bits fill otherwise unspecified bit locations in the result.
-%% If `?GL_MAP_STENCIL' is true, the index is replaced with the value that it references
-%% in lookup table `?GL_PIXEL_MAP_S_TO_S'. Whether the lookup replacement of the index
-%% is done or not, the integer part of the index is then ANDed with   2 b-1, where   b is
-%% the number of bits in the stencil buffer. The resulting stencil indices are then written
-%% to the stencil buffer such that the   nth index is written to location 
-%%
-%%  x n=x r+n% width
-%%
-%%  y n=y r+|n/width|
-%%
-%%  where  (x r y r) is the current raster position. Only the pixel ownership test, the scissor test,
-%% and the stencil writemask affect these write operations. 
-%%
-%% `?GL_DEPTH_COMPONENT':  Each pixel is a single-depth component. Floating-point data
-%% is converted directly to an internal floating-point format with unspecified precision.
-%% Signed integer data is mapped linearly to the internal floating-point format such that
-%% the most positive representable integer value maps to 1.0, and the most negative representable
-%% value maps to   -1.0. Unsigned integer data is mapped similarly: the largest integer value
-%% maps to 1.0, and 0 maps to 0.0. The resulting floating-point depth value is then multiplied
-%% by `?GL_DEPTH_SCALE' and added to `?GL_DEPTH_BIAS'. The result is clamped to
-%% the range  [0 1]. 
-%%
-%%  The GL then converts the resulting depth components to fragments by attaching the current
-%% raster position color or color index and texture coordinates to each pixel, then assigning
-%%   x and   y window coordinates to the   nth fragment such that 
-%%
-%%  x n=x r+n% width
-%%
-%%  y n=y r+|n/width|
-%%
-%%  where  (x r y r) is the current raster position. These pixel fragments are then treated just like
-%% the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog,
-%% and all the fragment operations are applied before the fragments are written to the frame
-%% buffer. 
-%%
-%% `?GL_RGBA'
-%%
-%% `?GL_BGRA':  Each pixel is a four-component group: For `?GL_RGBA', the red component
-%% is first, followed by green, followed by blue, followed by alpha; for `?GL_BGRA'
-%% the order is blue, green, red and then alpha. Floating-point values are converted directly
-%% to an internal floating-point format with unspecified precision. Signed integer values
-%% are mapped linearly to the internal floating-point format such that the most positive
-%% representable integer value maps to 1.0, and the most negative representable value maps
-%% to   -1.0. (Note that this mapping does not convert 0 precisely to 0.0.) Unsigned integer
-%% data is mapped similarly: The largest integer value maps to 1.0, and 0 maps to 0.0. The
-%% resulting floating-point color values are then multiplied by `?GL_c_SCALE' and added
-%% to `?GL_c_BIAS', where `c' is RED, GREEN, BLUE, and ALPHA for the respective
-%% color components. The results are clamped to the range  [0 1]. 
-%%
-%%  If `?GL_MAP_COLOR' is true, each color component is scaled by the size of lookup
-%% table `?GL_PIXEL_MAP_c_TO_c', then replaced by the value that it references in that
-%% table. `c' is R, G, B, or A respectively. 
-%%
-%%  The GL then converts the resulting RGBA colors to fragments by attaching the current
-%% raster position `z' coordinate and texture coordinates to each pixel, then assigning
-%%   x and   y window coordinates to the   nth fragment such that 
-%%
-%%  x n=x r+n% width
-%%
-%%  y n=y r+|n/width|
-%%
-%%  where  (x r y r) is the current raster position. These pixel fragments are then treated just like
-%% the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog,
-%% and all the fragment operations are applied before the fragments are written to the frame
-%% buffer. 
-%%
-%% `?GL_RED':  Each pixel is a single red component. This component is converted to
-%% the internal floating-point format in the same way the red component of an RGBA pixel
-%% is. It is then converted to an RGBA pixel with green and blue set to 0, and alpha set
-%% to 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel.
-%% 
-%%
-%% `?GL_GREEN':  Each pixel is a single green component. This component is converted
-%% to the internal floating-point format in the same way the green component of an RGBA pixel
-%% is. It is then converted to an RGBA pixel with red and blue set to 0, and alpha set to
-%% 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. 
-%%
-%% `?GL_BLUE':  Each pixel is a single blue component. This component is converted to
-%% the internal floating-point format in the same way the blue component of an RGBA pixel
-%% is. It is then converted to an RGBA pixel with red and green set to 0, and alpha set to
-%% 1. After this conversion, the pixel is treated as if it had been read as an RGBA pixel. 
-%%
-%% `?GL_ALPHA':  Each pixel is a single alpha component. This component is converted
-%% to the internal floating-point format in the same way the alpha component of an RGBA pixel
-%% is. It is then converted to an RGBA pixel with red, green, and blue set to 0. After this
-%% conversion, the pixel is treated as if it had been read as an RGBA pixel. 
-%%
-%% `?GL_RGB'
-%%
-%% `?GL_BGR':  Each pixel is a three-component group: red first, followed by green,
-%% followed by blue; for `?GL_BGR', the first component is blue, followed by green and
-%% then red. Each component is converted to the internal floating-point format in the same
-%% way the red, green, and blue components of an RGBA pixel are. The color triple is converted
-%% to an RGBA pixel with alpha set to 1. After this conversion, the pixel is treated as if
-%% it had been read as an RGBA pixel. 
-%%
-%% `?GL_LUMINANCE':  Each pixel is a single luminance component. This component is converted
-%% to the internal floating-point format in the same way the red component of an RGBA pixel
-%% is. It is then converted to an RGBA pixel with red, green, and blue set to the converted
-%% luminance value, and alpha set to 1. After this conversion, the pixel is treated as if
-%% it had been read as an RGBA pixel. 
-%%
-%% `?GL_LUMINANCE_ALPHA':  Each pixel is a two-component group: luminance first, followed
-%% by alpha. The two components are converted to the internal floating-point format in the
-%% same way the red component of an RGBA pixel is. They are then converted to an RGBA pixel
-%% with red, green, and blue set to the converted luminance value, and alpha set to the converted
-%% alpha value. After this conversion, the pixel is treated as if it had been read as an
-%% RGBA pixel.  
-%%
-%%  The following table summarizes the meaning of the valid constants for the `type'
-%% parameter:    
-%%
-%% <table><tbody><tr><td>` Type '</td><td>` Corresponding Type '</td></tr></tbody><tbody>
-%% <tr><td>`?GL_UNSIGNED_BYTE'</td><td> unsigned 8-bit integer </td></tr><tr><td>`?GL_BYTE'
-%% </td><td> signed 8-bit integer </td></tr><tr><td>`?GL_BITMAP'</td><td> single bits
-%% in unsigned 8-bit integers </td></tr><tr><td>`?GL_UNSIGNED_SHORT'</td><td> unsigned
-%% 16-bit integer </td></tr><tr><td>`?GL_SHORT'</td><td> signed 16-bit integer </td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT'</td><td> unsigned 32-bit integer </td></tr><tr><td>`?GL_INT'
-%% </td><td> 32-bit integer </td></tr><tr><td>`?GL_FLOAT'</td><td> single-precision
-%% floating-point </td></tr><tr><td>`?GL_UNSIGNED_BYTE_3_3_2'</td><td> unsigned 8-bit
-%% integer  </td></tr><tr><td>`?GL_UNSIGNED_BYTE_2_3_3_REV'</td><td> unsigned 8-bit
-%% integer with reversed component ordering </td></tr><tr><td>`?GL_UNSIGNED_SHORT_5_6_5'</td>
-%% <td> unsigned 16-bit integer </td></tr><tr><td>`?GL_UNSIGNED_SHORT_5_6_5_REV'</td><td>
-%%  unsigned 16-bit integer with reversed component ordering </td></tr><tr><td>`?GL_UNSIGNED_SHORT_4_4_4_4'
-%% </td><td> unsigned 16-bit integer </td></tr><tr><td>`?GL_UNSIGNED_SHORT_4_4_4_4_REV'</td>
-%% <td> unsigned 16-bit integer with reversed component ordering </td></tr><tr><td>`?GL_UNSIGNED_SHORT_5_5_5_1'
-%% </td><td> unsigned 16-bit integer </td></tr><tr><td>`?GL_UNSIGNED_SHORT_1_5_5_5_REV'</td>
-%% <td> unsigned 16-bit integer with reversed component ordering </td></tr><tr><td>`?GL_UNSIGNED_INT_8_8_8_8'
-%% </td><td> unsigned 32-bit integer </td></tr><tr><td>`?GL_UNSIGNED_INT_8_8_8_8_REV'</td>
-%% <td> unsigned 32-bit integer with reversed component ordering </td></tr><tr><td>`?GL_UNSIGNED_INT_10_10_10_2'
-%% </td><td> unsigned 32-bit integer </td></tr><tr><td>`?GL_UNSIGNED_INT_2_10_10_10_REV'</td>
-%% <td> unsigned 32-bit integer with reversed component ordering </td></tr></tbody></table>
-%%
-%%  The rasterization described so far assumes pixel zoom factors of 1. If  {@link gl:pixelZoom/2} 
-%%  is used to change the   x and   y pixel zoom factors, pixels are converted to fragments
-%% as follows. If  (x r y r) is the current raster position, and a given pixel is in the   nth column
-%% and   mth row of the pixel rectangle, then fragments are generated for pixels whose centers
-%% are in the rectangle with corners at 
-%%
-%% (x r+(zoom x)  n y r+(zoom y)  m)
-%%
-%% (x r+(zoom x)(n+1) y r+(zoom y)(m+1))
-%%
-%%  where   zoom x is the value of `?GL_ZOOM_X' and  zoom y is the value of `?GL_ZOOM_Y'
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawPixels.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glDrawPixels.xml">external</a> documentation.
 -spec drawPixels(Width, Height, Format, Type, Pixels) -> 'ok' when Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 drawPixels(Width,Height,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5236, <<Width:?GLsizei,Height:?GLsizei,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -5557,98 +2389,7 @@ drawPixels(Width,Height,Format,Type,Pixels) ->
 %% window. Results of copies from outside the window, or from regions of the window that
 %% are not exposed, are hardware dependent and undefined. 
 %%
-%%  `X'  and  `Y'  specify the window coordinates of the lower left corner of the rectangular
-%% region to be copied.  `Width'  and  `Height'  specify the dimensions of the rectangular
-%% region to be copied. Both  `Width'  and  `Height'  must not be negative. 
-%%
-%%  Several parameters control the processing of the pixel data while it is being copied.
-%% These parameters are set with three commands:  {@link gl:pixelTransferf/2} ,  {@link gl:pixelMapfv/3} 
-%% , and  {@link gl:pixelZoom/2} . This reference page describes the effects on ``gl:copyPixels''
-%%  of most, but not all, of the parameters specified by these three commands. 
-%%
-%% ``gl:copyPixels'' copies values from each pixel with the lower left-hand corner at (x+i
-%% y+j)
-%% for   0&lt;= i&lt; width and   0&lt;= j&lt; height. This pixel is said to be the   ith
-%% pixel in the   jth row. Pixels are copied in row order from the lowest to the highest
-%% row, left to right in each row. 
-%%
-%%  `Type'  specifies whether color, depth, or stencil data is to be copied. The details
-%% of the transfer for each data type are as follows: 
-%%
-%% `?GL_COLOR':  Indices or RGBA colors are read from the buffer currently specified
-%% as the read source buffer (see  {@link gl:readBuffer/1} ). If the GL is in color index mode,
-%% each index that is read from this buffer is converted to a fixed-point format with an
-%% unspecified number of bits to the right of the binary point. Each index is then shifted
-%% left by `?GL_INDEX_SHIFT' bits, and added to `?GL_INDEX_OFFSET'. If `?GL_INDEX_SHIFT'
-%%  is negative, the shift is to the right. In either case, zero bits fill otherwise unspecified
-%% bit locations in the result. If `?GL_MAP_COLOR' is true, the index is replaced with
-%% the value that it references in lookup table `?GL_PIXEL_MAP_I_TO_I'. Whether the
-%% lookup replacement of the index is done or not, the integer part of the index is then
-%% ANDed with   2 b-1, where   b is the number of bits in a color index buffer. 
-%%
-%%  If the GL is in RGBA mode, the red, green, blue, and alpha components of each pixel that
-%% is read are converted to an internal floating-point format with unspecified precision.
-%% The conversion maps the largest representable component value to 1.0, and component value
-%% 0 to 0.0. The resulting floating-point color values are then multiplied by `?GL_c_SCALE'
-%%  and added to `?GL_c_BIAS', where `c' is RED, GREEN, BLUE, and ALPHA for the
-%% respective color components. The results are clamped to the range [0,1]. If `?GL_MAP_COLOR'
-%%  is true, each color component is scaled by the size of lookup table `?GL_PIXEL_MAP_c_TO_c'
-%% , then replaced by the value that it references in that table. `c' is R, G, B, or
-%% A. 
-%%
-%%  If the ARB_imaging extension is supported, the color values may be additionally processed
-%% by color-table lookups, color-matrix transformations, and convolution filters. 
-%%
-%%  The GL then converts the resulting indices or RGBA colors to fragments by attaching the
-%% current raster position `z' coordinate and texture coordinates to each pixel, then
-%% assigning window coordinates (x r+i y r+j), where  (x r y r) is the current raster position, and the pixel was
-%% the   ith pixel in the   jth row. These pixel fragments are then treated just like the
-%% fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and
-%% all the fragment operations are applied before the fragments are written to the frame
-%% buffer. 
-%%
-%% `?GL_DEPTH':  Depth values are read from the depth buffer and converted directly
-%% to an internal floating-point format with unspecified precision. The resulting floating-point
-%% depth value is then multiplied by `?GL_DEPTH_SCALE' and added to `?GL_DEPTH_BIAS'
-%% . The result is clamped to the range [0,1]. 
-%%
-%%  The GL then converts the resulting depth components to fragments by attaching the current
-%% raster position color or color index and texture coordinates to each pixel, then assigning
-%% window coordinates (x r+i y r+j), where  (x r y r) is the current raster position, and the pixel was the   ith
-%% pixel in the   jth row. These pixel fragments are then treated just like the fragments
-%% generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the
-%% fragment operations are applied before the fragments are written to the frame buffer. 
-%%
-%% `?GL_STENCIL':  Stencil indices are read from the stencil buffer and converted to
-%% an internal fixed-point format with an unspecified number of bits to the right of the
-%% binary point. Each fixed-point index is then shifted left by `?GL_INDEX_SHIFT' bits,
-%% and added to `?GL_INDEX_OFFSET'. If `?GL_INDEX_SHIFT' is negative, the shift
-%% is to the right. In either case, zero bits fill otherwise unspecified bit locations in
-%% the result. If `?GL_MAP_STENCIL' is true, the index is replaced with the value that
-%% it references in lookup table `?GL_PIXEL_MAP_S_TO_S'. Whether the lookup replacement
-%% of the index is done or not, the integer part of the index is then ANDed with   2 b-1,
-%% where   b is the number of bits in the stencil buffer. The resulting stencil indices are
-%% then written to the stencil buffer such that the index read from the   ith location of
-%% the   jth row is written to location (x r+i y r+j), where  (x r y r) is the current raster position. Only the
-%% pixel ownership test, the scissor test, and the stencil writemask affect these write operations.
-%% 
-%%
-%%  The rasterization described thus far assumes pixel zoom factors of 1.0. If  {@link gl:pixelZoom/2} 
-%%  is used to change the   x and   y pixel zoom factors, pixels are converted to fragments
-%% as follows. If  (x r y r) is the current raster position, and a given pixel is in the   ith location
-%% in the   jth row of the source pixel rectangle, then fragments are generated for pixels
-%% whose centers are in the rectangle with corners at 
-%%
-%% (x r+(zoom x)  i y r+(zoom y)  j)
-%%
-%%  and 
-%%
-%% (x r+(zoom x)(i+1) y r+(zoom y)(j+1))
-%%
-%%  where   zoom x is the value of `?GL_ZOOM_X' and  zoom y is the value of `?GL_ZOOM_Y'
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyPixels.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCopyPixels.xml">external</a> documentation.
 -spec copyPixels(X, Y, Width, Height, Type) -> 'ok' when X :: integer(),Y :: integer(),Width :: integer(),Height :: integer(),Type :: enum().
 copyPixels(X,Y,Width,Height,Type) ->
   cast(5238, <<X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei,Type:?GLenum>>).
@@ -5661,57 +2402,7 @@ copyPixels(X,Y,Width,Height,Type) ->
 %% typically used in multipass rendering algorithms to achieve special effects, such as decals,
 %% outlining, and constructive solid geometry rendering. 
 %%
-%%  The stencil test conditionally eliminates a pixel based on the outcome of a comparison
-%% between the reference value and the value in the stencil buffer. To enable and disable
-%% the test, call  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_STENCIL_TEST'
-%% . To specify actions based on the outcome of the stencil test, call  {@link gl:stencilOp/3} 
-%% or   {@link gl:stencilOpSeparate/4} . 
-%%
-%%  There can be two separate sets of  `Func' ,  `Ref' , and   `Mask'  parameters;
-%% one affects back-facing polygons, and the other affects front-facing polygons as well
-%% as other non-polygon primitives.   {@link gl:stencilFunc/3}  sets both front and back stencil
-%% state to the same values. Use  {@link gl:stencilFuncSeparate/4}  to set front and back stencil
-%% state to different values. 
-%%
-%%  `Func'  is a symbolic constant that determines the stencil comparison function. It
-%% accepts one of eight values, shown in the following list.  `Ref'  is an integer reference
-%% value that is used in the stencil comparison. It is clamped to the range  [0 2 n-1], where   n
-%% is the number of bitplanes in the stencil buffer.  `Mask'  is bitwise ANDed with both
-%% the reference value and the stored stencil value, with the ANDed values participating
-%% in the comparison. 
-%%
-%%  If `stencil' represents the value stored in the corresponding stencil buffer location,
-%% the following list shows the effect of each comparison function that can be specified by  `Func' 
-%% . Only if the comparison succeeds is the pixel passed through to the next stage in the
-%% rasterization process (see  {@link gl:stencilOp/3} ). All tests treat `stencil' values
-%% as unsigned integers in the range [0 2 n-1], where   n is the number of bitplanes in the stencil
-%% buffer. 
-%%
-%%  The following values are accepted by  `Func' : 
-%%
-%% `?GL_NEVER':  Always fails. 
-%%
-%% `?GL_LESS':  Passes if (  `Ref'  &amp;  `Mask'  ) &lt; ( `stencil' &amp;  `Mask' 
-%%  ). 
-%%
-%% `?GL_LEQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) &lt;= ( `stencil'
-%% &amp;  `Mask'  ). 
-%%
-%% `?GL_GREATER':  Passes if (  `Ref'  &amp;  `Mask'  ) &gt; ( `stencil'
-%% &amp;  `Mask'  ). 
-%%
-%% `?GL_GEQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) &gt;= ( `stencil'
-%% &amp;  `Mask'  ). 
-%%
-%% `?GL_EQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) = ( `stencil' &amp;  `Mask' 
-%%  ). 
-%%
-%% `?GL_NOTEQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) != ( `stencil' &amp;
-%%  `Mask'  ). 
-%%
-%% `?GL_ALWAYS':  Always passes. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilFunc.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glStencilFunc.xhtml">external</a> documentation.
 -spec stencilFunc(Func, Ref, Mask) -> 'ok' when Func :: enum(),Ref :: integer(),Mask :: integer().
 stencilFunc(Func,Ref,Mask) ->
   cast(5239, <<Func:?GLenum,Ref:?GLint,Mask:?GLuint>>).
@@ -5724,12 +2415,7 @@ stencilFunc(Func,Ref,Mask) ->
 %% bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected.
 %% Initially, all bits are enabled for writing. 
 %%
-%%  There can be two separate  `Mask'  writemasks; one affects back-facing polygons, and
-%% the other affects front-facing polygons as well as other non-polygon primitives.   {@link gl:stencilMask/1} 
-%%  sets both front and back stencil writemasks to the same values. Use  {@link gl:stencilMaskSeparate/2} 
-%%  to set front and back stencil writemasks to different values. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilMask.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glStencilMask.xhtml">external</a> documentation.
 -spec stencilMask(Mask) -> 'ok' when Mask :: integer().
 stencilMask(Mask) ->
   cast(5240, <<Mask:?GLuint>>).
@@ -5742,55 +2428,7 @@ stencilMask(Mask) ->
 %% used in multipass rendering algorithms to achieve special effects, such as decals, outlining,
 %% and constructive solid geometry rendering. 
 %%
-%%  The stencil test conditionally eliminates a pixel based on the outcome of a comparison
-%% between the value in the stencil buffer and a reference value. To enable and disable the
-%% test, call  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_STENCIL_TEST'
-%% ; to control it, call   {@link gl:stencilFunc/3}  or   {@link gl:stencilFuncSeparate/4} . 
-%%
-%%  There can be two separate sets of  `Sfail' ,  `Dpfail' , and   `Dppass'  parameters;
-%% one affects back-facing polygons, and the other affects front-facing polygons as well
-%% as other non-polygon primitives.   {@link gl:stencilOp/3}  sets both front and back stencil
-%% state to the same values. Use  {@link gl:stencilOpSeparate/4}  to set front and back stencil
-%% state to different values. 
-%%
-%% ``gl:stencilOp'' takes three arguments that indicate what happens to the stored stencil
-%% value while stenciling is enabled. If the stencil test fails, no change is made to the
-%% pixel's color or depth buffers, and  `Sfail'  specifies what happens to the stencil
-%% buffer contents. The following eight actions are possible. 
-%%
-%% `?GL_KEEP':  Keeps the current value. 
-%%
-%% `?GL_ZERO':  Sets the stencil buffer value to 0. 
-%%
-%% `?GL_REPLACE':  Sets the stencil buffer value to `ref', as specified by  {@link gl:stencilFunc/3} 
-%% . 
-%%
-%% `?GL_INCR':  Increments the current stencil buffer value. Clamps to the maximum representable
-%% unsigned value. 
-%%
-%% `?GL_INCR_WRAP':  Increments the current stencil buffer value. Wraps stencil buffer
-%% value to zero when incrementing the maximum representable unsigned value. 
-%%
-%% `?GL_DECR':  Decrements the current stencil buffer value. Clamps to 0. 
-%%
-%% `?GL_DECR_WRAP':  Decrements the current stencil buffer value. Wraps stencil buffer
-%% value to the maximum representable unsigned value when decrementing a stencil buffer value
-%% of zero. 
-%%
-%% `?GL_INVERT':  Bitwise inverts the current stencil buffer value. 
-%%
-%%  Stencil buffer values are treated as unsigned integers. When incremented and decremented,
-%% values are clamped to 0 and   2 n-1, where   n is the value returned by querying `?GL_STENCIL_BITS'
-%% . 
-%%
-%%  The other two arguments to ``gl:stencilOp'' specify stencil buffer actions that depend
-%% on whether subsequent depth buffer tests succeed ( `Dppass' ) or fail ( `Dpfail' )
-%% (see  {@link gl:depthFunc/1} ). The actions are specified using the same eight symbolic constants
-%% as  `Sfail' . Note that  `Dpfail'  is ignored when there is no depth buffer, or
-%% when the depth buffer is not enabled. In these cases,  `Sfail'  and  `Dppass'  specify
-%% stencil action when the stencil test fails and passes, respectively. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilOp.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glStencilOp.xhtml">external</a> documentation.
 -spec stencilOp(Fail, Zfail, Zpass) -> 'ok' when Fail :: enum(),Zfail :: enum(),Zpass :: enum().
 stencilOp(Fail,Zfail,Zpass) ->
   cast(5241, <<Fail:?GLenum,Zfail:?GLenum,Zpass:?GLenum>>).
@@ -5801,7 +2439,7 @@ stencilOp(Fail,Zfail,Zpass) ->
 %% buffer.  `S'  is masked with   2 m-1, where   m is the number of bits in the stencil
 %% buffer. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearStencil.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClearStencil.xhtml">external</a> documentation.
 -spec clearStencil(S) -> 'ok' when S :: integer().
 clearStencil(S) ->
   cast(5242, <<S:?GLint>>).
@@ -5818,69 +2456,7 @@ clearStencil(S) ->
 %%  is either `?GL_OBJECT_PLANE' or `?GL_EYE_PLANE',  `Params'  contains coefficients
 %% for the corresponding texture generation function. 
 %%
-%%  If the texture generation function is `?GL_OBJECT_LINEAR', the function 
-%%
-%%  g=p 1×x o+p 2×y o+p 3×z o+p 4×w o
-%%
-%%  is used, where   g is the value computed for the coordinate named in  `Coord' ,  p 1,
-%%  p 2,  p 3, and  p 4 are the four values supplied in  `Params' , and  x o,  y o,  z o,
-%% and  w o are the object coordinates of the vertex. This function can be used, for example,
-%% to texture-map terrain using sea level as a reference plane (defined by   p 1,   p 2,   p
-%% 3, and   p 4). The altitude of a terrain vertex is computed by the `?GL_OBJECT_LINEAR'
-%%  coordinate generation function as its distance from sea level; that altitude can then
-%% be used to index the texture image to map white snow onto peaks and green grass onto foothills.
-%% 
-%%
-%%  If the texture generation function is `?GL_EYE_LINEAR', the function 
-%%
-%%  g=(p 1)"×x e+(p 2)"×y e+(p 3)"×z e+(p 4)"×w e
-%%
-%%  is used, where 
-%%
-%% ((p 1)" (p 2)" (p 3)" (p 4)")=(p 1  p 2  p 3  p 4)  M -1
-%%
-%%  and  x e,  y e,  z e, and  w e are the eye coordinates of the vertex,  p 1,  p 2,  p 3,
-%% and  p 4 are the values supplied in  `Params' , and  M is the modelview matrix when ``gl:texGen''
-%%  is invoked. If   M is poorly conditioned or singular, texture coordinates generated by
-%% the resulting function may be inaccurate or undefined. 
-%%
-%%  Note that the values in  `Params'  define a reference plane in eye coordinates. The
-%% modelview matrix that is applied to them may not be the same one in effect when the polygon
-%% vertices are transformed. This function establishes a field of texture coordinates that
-%% can produce dynamic contour lines on moving objects. 
-%%
-%%  If the texture generation function is `?GL_SPHERE_MAP' and  `Coord'  is either `?GL_S'
-%%  or `?GL_T',  s and   t texture coordinates are generated as follows. Let `u'
-%% be the unit vector pointing from the origin to the polygon vertex (in eye coordinates).
-%% Let `n' sup prime be the current normal, after transformation to eye coordinates.
-%% Let 
-%%
-%%  f=(f x  f y  f z) T be the reflection vector such that 
-%%
-%%  f=u-2  n" (n") T  u
-%%
-%%  Finally, let   m=2 ((f x) 2+(f y) 2+(f z+1) 2). Then the values assigned to the   s and   t texture coordinates
-%% are 
-%%
-%%  s=f x/m+1/2
-%%
-%%  t=f y/m+1/2
-%%
-%%  To enable or disable a texture-coordinate generation function, call  {@link gl:enable/1} 
-%% or  {@link gl:enable/1}  with one of the symbolic texture-coordinate names (`?GL_TEXTURE_GEN_S'
-%% , `?GL_TEXTURE_GEN_T', `?GL_TEXTURE_GEN_R', or `?GL_TEXTURE_GEN_Q') as
-%% the argument. When enabled, the specified texture coordinate is computed according to
-%% the generating function associated with that coordinate. When disabled, subsequent vertices
-%% take the specified texture coordinate from the current set of texture coordinates. Initially,
-%% all texture generation functions are set to `?GL_EYE_LINEAR' and are disabled. Both
-%%   s plane equations are (1, 0, 0, 0), both   t plane equations are (0, 1, 0, 0), and all
-%%   r and   q plane equations are (0, 0, 0, 0). 
-%%
-%%  When the ARB_multitexture extension is supported, ``gl:texGen'' sets the texture generation
-%% parameters for the currently active texture unit, selected with  {@link gl:activeTexture/1} .
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexGen.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glTexGen.xml">external</a> documentation.
 -spec texGend(Coord, Pname, Param) -> 'ok' when Coord :: enum(),Pname :: enum(),Param :: float().
 texGend(Coord,Pname,Param) ->
   cast(5243, <<Coord:?GLenum,Pname:?GLenum,Param:?GLdouble>>).
@@ -5925,22 +2501,7 @@ texGeniv(Coord,Pname,Params) ->
 %% of the (`s', `t', `r', `q') texture coordinates, using the symbolic
 %% constant `?GL_S', `?GL_T', `?GL_R', or `?GL_Q'. 
 %%
-%%  `Pname'  specifies one of three symbolic names: 
-%%
-%% `?GL_TEXTURE_GEN_MODE':  `Params'  returns the single-valued texture generation
-%% function, a symbolic constant. The initial value is `?GL_EYE_LINEAR'. 
-%%
-%% `?GL_OBJECT_PLANE':  `Params'  returns the four plane equation coefficients that
-%% specify object linear-coordinate generation. Integer values, when requested, are mapped
-%% directly from the internal floating-point representation. 
-%%
-%% `?GL_EYE_PLANE':  `Params'  returns the four plane equation coefficients that
-%% specify eye linear-coordinate generation. Integer values, when requested, are mapped directly
-%% from the internal floating-point representation. The returned values are those maintained
-%% in eye coordinates. They are not equal to the values specified using  {@link gl:texGend/3} ,
-%% unless the modelview matrix was identity when  {@link gl:texGend/3}  was called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTexGen.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetTexGen.xml">external</a> documentation.
 -spec getTexGendv(Coord, Pname) -> {float(),float(),float(),float()} when Coord :: enum(),Pname :: enum().
 getTexGendv(Coord,Pname) ->
   call(5249, <<Coord:?GLenum,Pname:?GLenum>>).
@@ -5959,14 +2520,14 @@ getTexGeniv(Coord,Pname) ->
 
 %% @doc glTexEnvf
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexEnvf.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec texEnvf(Target, Pname, Param) -> 'ok' when Target :: enum(),Pname :: enum(),Param :: float().
 texEnvf(Target,Pname,Param) ->
   cast(5252, <<Target:?GLenum,Pname:?GLenum,Param:?GLfloat>>).
 
 %% @doc glTexEnvi
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexEnvi.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec texEnvi(Target, Pname, Param) -> 'ok' when Target :: enum(),Pname :: enum(),Param :: integer().
 texEnvi(Target,Pname,Param) ->
   cast(5253, <<Target:?GLenum,Pname:?GLenum,Param:?GLint>>).
@@ -5980,158 +2541,7 @@ texEnvi(Target,Pname,Param) ->
 %% , `?GL_ALPHA_SCALE', `?GL_SRC0_RGB', `?GL_SRC1_RGB', `?GL_SRC2_RGB', `?GL_SRC0_ALPHA'
 %% , `?GL_SRC1_ALPHA', or `?GL_SRC2_ALPHA'. 
 %%
-%%  If  `Pname'  is `?GL_TEXTURE_ENV_MODE', then  `Params'  is (or points to)
-%% the symbolic name of a texture function. Six texture functions may be specified: `?GL_ADD'
-%% , `?GL_MODULATE', `?GL_DECAL', `?GL_BLEND', `?GL_REPLACE', or `?GL_COMBINE'
-%% . 
-%%
-%%  The following table shows the correspondence of filtered texture values  R t,  G t,  B t,
-%%  A t,  L t,  I t to texture source components.  C s and  A s are used by the texture functions
-%% described below. 
-%%
-%% <table><tbody><tr><td> Texture Base Internal Format </td><td> C s</td><td> A s</td></tr></tbody>
-%% <tbody><tr><td>`?GL_ALPHA'</td><td> (0, 0, 0) </td><td> A t</td></tr><tr><td>`?GL_LUMINANCE'
-%% </td><td> (  L t,  L t,  L t ) </td><td> 1 </td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td>
-%% <td> (  L t,  L t,  L t ) </td><td> A t</td></tr><tr><td>`?GL_INTENSITY'</td><td> ( 
-%% I t,  I t,  I t ) </td><td> I t</td></tr><tr><td>`?GL_RGB'</td><td> (  R t,  G t,  B
-%% t ) </td><td> 1 </td></tr><tr><td>`?GL_RGBA'</td><td> (  R t,  G t,  B t ) </td><td>
-%% A t</td></tr></tbody></table>
-%%
-%%  A texture function acts on the fragment to be textured using the texture image value
-%% that applies to the fragment (see  {@link gl:texParameterf/3} ) and produces an RGBA color
-%% for that fragment. The following table shows how the RGBA color is produced for each of
-%% the first five texture functions that can be chosen.  C is a triple of color values (RGB)
-%% and  A is the associated alpha value. RGBA values extracted from a texture image are in
-%% the range [0,1]. The subscript  p refers to the color computed from the previous texture
-%% stage (or the incoming fragment if processing texture stage 0), the subscript  s to the
-%% texture source color, the subscript  c to the texture environment color, and the subscript
-%%  v indicates a value produced by the texture function. 
-%%
-%% <table><tbody><tr><td> Texture Base Internal Format </td><td>`?Value'</td><td>`?GL_REPLACE'
-%%  Function </td><td>`?GL_MODULATE' Function </td><td>`?GL_DECAL' Function </td><td>
-%% `?GL_BLEND' Function </td><td>`?GL_ADD' Function </td></tr></tbody><tbody><tr><td>
-%% `?GL_ALPHA'</td><td> C v=</td><td> C p</td><td> C p</td><td> undefined </td><td> C p</td>
-%% <td> C p</td></tr><tr><td></td><td> A v=</td><td> A s</td><td> A p  A s</td><td></td><td>
-%% A v=A p  A s</td><td> A p  A s</td></tr><tr><td>`?GL_LUMINANCE'</td><td> C v=</td><td>
-%%  C s</td><td> C p  C s</td><td> undefined </td><td> C p (1-C s)+C c  C s</td><td> C p+C s</td></tr>
-%% <tr><td> (or 1) </td><td> A v=</td><td> A p</td><td> A p</td><td></td><td> A p</td><td> A
-%% p</td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td> C v=</td><td> C s</td><td> C p  C
-%% s</td><td> undefined </td><td> C p (1-C s)+C c  C s</td><td> C p+C s</td></tr><tr><td> (or 2) </td>
-%% <td> A v=</td><td> A s</td><td> A p  A s</td><td></td><td> A p  A s</td><td> A p  A s</td>
-%% </tr><tr><td>`?GL_INTENSITY'</td><td> C v=</td><td> C s</td><td> C p  C s</td><td>
-%% undefined </td><td> C p (1-C s)+C c  C s</td><td> C p+C s</td></tr><tr><td></td><td> A v=</td><td>
-%%  A s</td><td> A p  A s</td><td></td><td> A p (1-A s)+A c  A s</td><td> A p+A s</td></tr><tr><td>`?GL_RGB'
-%% </td><td> C v=</td><td> C s</td><td> C p  C s</td><td> C s</td><td> C p (1-C s)+C c  C s</td><td>
-%%  C p+C s</td></tr><tr><td> (or 3) </td><td> A v=</td><td> A p</td><td> A p</td><td> A p</td>
-%% <td> A p</td><td> A p</td></tr><tr><td>`?GL_RGBA'</td><td> C v=</td><td> C s</td><td>
-%%  C p  C s</td><td> C p (1-A s)+C s  A s</td><td> C p (1-C s)+C c  C s</td><td> C p+C s</td></tr><tr><td>
-%%  (or 4) </td><td> A v=</td><td> A s</td><td> A p  A s</td><td> A p</td><td> A p  A s</td><td>
-%%  A p  A s</td></tr></tbody></table>
-%%
-%%  If  `Pname'  is `?GL_TEXTURE_ENV_MODE', and  `Params'  is `?GL_COMBINE',
-%% the form of the texture function depends on the values of `?GL_COMBINE_RGB' and `?GL_COMBINE_ALPHA'
-%% . 
-%%
-%%  The following describes how the texture sources, as specified by `?GL_SRC0_RGB', `?GL_SRC1_RGB'
-%% , `?GL_SRC2_RGB', `?GL_SRC0_ALPHA', `?GL_SRC1_ALPHA', and `?GL_SRC2_ALPHA'
-%% , are combined to produce a final texture color. In the following tables, `?GL_SRC0_c'
-%%  is represented by  Arg0, `?GL_SRC1_c' is represented by  Arg1, and `?GL_SRC2_c'
-%% is represented by  Arg2. 
-%%
-%% `?GL_COMBINE_RGB' accepts any of `?GL_REPLACE', `?GL_MODULATE', `?GL_ADD'
-%% , `?GL_ADD_SIGNED', `?GL_INTERPOLATE', `?GL_SUBTRACT', `?GL_DOT3_RGB',
-%% or `?GL_DOT3_RGBA'. 
-%%
-%% <table><tbody><tr><td>`?GL_COMBINE_RGB'</td><td>` Texture Function '</td></tr></tbody>
-%% <tbody><tr><td>`?GL_REPLACE'</td><td> Arg0</td></tr><tr><td>`?GL_MODULATE'</td><td>
-%%  Arg0×Arg1</td></tr><tr><td>`?GL_ADD'</td><td> Arg0+Arg1</td></tr><tr><td>`?GL_ADD_SIGNED'
-%% </td><td> Arg0+Arg1-0.5</td></tr><tr><td>`?GL_INTERPOLATE'</td><td> Arg0×Arg2+Arg1×(1-
-%% Arg2)</td>
-%% </tr><tr><td>`?GL_SUBTRACT'</td><td> Arg0-Arg1</td></tr><tr><td>`?GL_DOT3_RGB'
-%% or `?GL_DOT3_RGBA'</td><td> 4×((((Arg0 r)-0.5)×((Arg1 r)-0.5))+(((Arg0 g)-0.5)×((Arg1 g)-0.5))+(((Arg0 b)-0.5)×((Arg1 b)-0.5)))</td></tr></tbody></table>
-%%
-%%  The scalar results for `?GL_DOT3_RGB' and `?GL_DOT3_RGBA' are placed into each
-%% of the 3 (RGB) or 4 (RGBA) components on output. 
-%%
-%%  Likewise, `?GL_COMBINE_ALPHA' accepts any of `?GL_REPLACE', `?GL_MODULATE',
-%% `?GL_ADD', `?GL_ADD_SIGNED', `?GL_INTERPOLATE', or `?GL_SUBTRACT'.
-%% The following table describes how alpha values are combined: 
-%%
-%% <table><tbody><tr><td>`?GL_COMBINE_ALPHA'</td><td>` Texture Function '</td></tr>
-%% </tbody><tbody><tr><td>`?GL_REPLACE'</td><td> Arg0</td></tr><tr><td>`?GL_MODULATE'
-%% </td><td> Arg0×Arg1</td></tr><tr><td>`?GL_ADD'</td><td> Arg0+Arg1</td></tr><tr><td>`?GL_ADD_SIGNED'
-%% </td><td> Arg0+Arg1-0.5</td></tr><tr><td>`?GL_INTERPOLATE'</td><td> Arg0×Arg2+Arg1×(1-
-%% Arg2)</td>
-%% </tr><tr><td>`?GL_SUBTRACT'</td><td> Arg0-Arg1</td></tr></tbody></table>
-%%
-%%  In the following tables, the value  C s represents the color sampled from the currently
-%% bound texture,  C c represents the constant texture-environment color,  C f represents
-%% the primary color of the incoming fragment, and  C p represents the color computed from
-%% the previous texture stage or  C f if processing texture stage 0. Likewise,  A s,  A c, 
-%% A f, and  A p represent the respective alpha values. 
-%%
-%%  The following table describes the values assigned to  Arg0,  Arg1, and  Arg2 based upon
-%% the RGB sources and operands: 
-%%
-%% <table><tbody><tr><td>`?GL_SRCn_RGB'</td><td>`?GL_OPERANDn_RGB'</td><td>` Argument Value '
-%% </td></tr></tbody><tbody><tr><td>`?GL_TEXTURE'</td><td>`?GL_SRC_COLOR'</td><td>(C
-%%  s)</td>
-%% </tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_COLOR'</td><td> 1-(C s)</td></tr><tr><td></td><td>
-%% `?GL_SRC_ALPHA'</td><td>(A s)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'</td>
-%% <td> 1-(A s)</td></tr><tr><td>`?GL_TEXTUREn'</td><td>`?GL_SRC_COLOR'</td><td>(C s)</td></tr>
-%% <tr><td></td><td>`?GL_ONE_MINUS_SRC_COLOR'</td><td> 1-(C s)</td></tr><tr><td></td><td>`?GL_SRC_ALPHA'
-%% </td><td>(A s)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td> 1-(A s)</td></tr><tr>
-%% <td>`?GL_CONSTANT'</td><td>`?GL_SRC_COLOR'</td><td>(C c)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_COLOR'
-%% </td><td> 1-(C c)</td></tr><tr><td></td><td>`?GL_SRC_ALPHA'</td><td>(A c)</td></tr><tr><td></td>
-%% <td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td> 1-(A c)</td></tr><tr><td>`?GL_PRIMARY_COLOR'</td>
-%% <td>`?GL_SRC_COLOR'</td><td>(C f)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_COLOR'</td>
-%% <td> 1-(C f)</td></tr><tr><td></td><td>`?GL_SRC_ALPHA'</td><td>(A f)</td></tr><tr><td></td><td>
-%% `?GL_ONE_MINUS_SRC_ALPHA'</td><td> 1-(A f)</td></tr><tr><td>`?GL_PREVIOUS'</td><td>`?GL_SRC_COLOR'
-%% </td><td>(C p)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_COLOR'</td><td> 1-(C p)</td></tr><tr>
-%% <td></td><td>`?GL_SRC_ALPHA'</td><td>(A p)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'
-%% </td><td> 1-(A p)</td></tr></tbody></table>
-%%
-%%  For `?GL_TEXTUREn' sources,  C s and  A s represent the color and alpha, respectively,
-%% produced from texture stage  n. 
-%%
-%%  The follow table describes the values assigned to  Arg0,  Arg1, and  Arg2 based upon
-%% the alpha sources and operands: 
-%%
-%% <table><tbody><tr><td>`?GL_SRCn_ALPHA'</td><td>`?GL_OPERANDn_ALPHA'</td><td>` Argument Value '
-%% </td></tr></tbody><tbody><tr><td>`?GL_TEXTURE'</td><td>`?GL_SRC_ALPHA'</td><td>(A
-%%  s)</td>
-%% </tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td> 1-(A s)</td></tr><tr><td>`?GL_TEXTUREn'
-%% </td><td>`?GL_SRC_ALPHA'</td><td>(A s)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'
-%% </td><td> 1-(A s)</td></tr><tr><td>`?GL_CONSTANT'</td><td>`?GL_SRC_ALPHA'</td><td>(A
-%% c)</td>
-%% </tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td> 1-(A c)</td></tr><tr><td>`?GL_PRIMARY_COLOR'
-%% </td><td>`?GL_SRC_ALPHA'</td><td>(A f)</td></tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'
-%% </td><td> 1-(A f)</td></tr><tr><td>`?GL_PREVIOUS'</td><td>`?GL_SRC_ALPHA'</td><td>(A
-%% p)</td>
-%% </tr><tr><td></td><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td> 1-(A p)</td></tr></tbody></table>
-%% 
-%%
-%%  The RGB and alpha results of the texture function are multipled by the values of `?GL_RGB_SCALE'
-%%  and `?GL_ALPHA_SCALE', respectively, and clamped to the range [0 1]. 
-%%
-%%  If  `Pname'  is `?GL_TEXTURE_ENV_COLOR',  `Params'  is a pointer to an array
-%% that holds an RGBA color consisting of four values. Integer color components are interpreted
-%% linearly such that the most positive integer maps to 1.0, and the most negative integer
-%% maps to -1.0. The values are clamped to the range [0,1] when they are specified.  C c
-%% takes these four values. 
-%%
-%%  If  `Pname'  is `?GL_TEXTURE_LOD_BIAS', the value specified is added to the texture
-%% level-of-detail parameter, that selects which mipmap, or mipmaps depending upon the selected
-%% `?GL_TEXTURE_MIN_FILTER', will be sampled. 
-%%
-%% `?GL_TEXTURE_ENV_MODE' defaults to `?GL_MODULATE' and `?GL_TEXTURE_ENV_COLOR'
-%%  defaults to (0, 0, 0, 0). 
-%%
-%%  If  `Target'  is `?GL_POINT_SPRITE' and  `Pname'  is `?GL_COORD_REPLACE',
-%% the boolean value specified is used to either enable or disable point sprite texture coordinate
-%% replacement. The default value is `?GL_FALSE'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexEnv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glTexEnv.xml">external</a> documentation.
 -spec texEnvfv(Target, Pname, Params) -> 'ok' when Target :: enum(),Pname :: enum(),Params :: tuple().
 texEnvfv(Target,Pname,Params) ->
   cast(5254, <<Target:?GLenum,Pname:?GLenum,(size(Params)):?GLuint,
@@ -6149,80 +2559,7 @@ texEnviv(Target,Pname,Params) ->
 %% ``gl:getTexEnv'' returns in  `Params'  selected values of a texture environment that
 %% was specified with  {@link gl:texEnvfv/3} .  `Target'  specifies a texture environment. 
 %%
-%%  When  `Target'  is `?GL_TEXTURE_FILTER_CONTROL',  `Pname'  must be `?GL_TEXTURE_LOD_BIAS'
-%% .  When  `Target'  is `?GL_POINT_SPRITE',  `Pname'  must be `?GL_COORD_REPLACE'
-%% . When  `Target'  is `?GL_TEXTURE_ENV',  `Pname'  can be `?GL_TEXTURE_ENV_MODE'
-%% , `?GL_TEXTURE_ENV_COLOR', `?GL_COMBINE_RGB', `?GL_COMBINE_ALPHA', `?GL_RGB_SCALE'
-%% , `?GL_ALPHA_SCALE',  `?GL_SRC0_RGB', `?GL_SRC1_RGB', `?GL_SRC2_RGB',
-%% `?GL_SRC0_ALPHA', `?GL_SRC1_ALPHA', or `?GL_SRC2_ALPHA'. 
-%%
-%%  `Pname'  names a specific texture environment parameter, as follows: 
-%%
-%% `?GL_TEXTURE_ENV_MODE':  `Params'  returns the single-valued texture environment
-%% mode, a symbolic constant. The initial value is `?GL_MODULATE'. 
-%%
-%% `?GL_TEXTURE_ENV_COLOR':  `Params'  returns four integer or floating-point values
-%% that are the texture environment color. Integer values, when requested, are linearly mapped
-%% from the internal floating-point representation such that 1.0 maps to the most positive
-%% representable integer, and   -1.0 maps to the most negative representable integer. The
-%% initial value is (0, 0, 0, 0). 
-%%
-%% `?GL_TEXTURE_LOD_BIAS':  `Params'  returns a single floating-point value that
-%% is the texture level-of-detail bias. The initial value is 0. 
-%%
-%% `?GL_COMBINE_RGB':  `Params'  returns a single symbolic constant value representing
-%% the current RGB combine mode. The initial value is `?GL_MODULATE'. 
-%%
-%% `?GL_COMBINE_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the current alpha combine mode. The initial value is `?GL_MODULATE'. 
-%%
-%% `?GL_SRC0_RGB':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner zero's RGB source. The initial value is `?GL_TEXTURE'. 
-%%
-%% `?GL_SRC1_RGB':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner one's RGB source. The initial value is `?GL_PREVIOUS'. 
-%%
-%% `?GL_SRC2_RGB':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner two's RGB source. The initial value is `?GL_CONSTANT'. 
-%%
-%% `?GL_SRC0_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner zero's alpha source. The initial value is `?GL_TEXTURE'. 
-%%
-%% `?GL_SRC1_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner one's alpha source. The initial value is `?GL_PREVIOUS'. 
-%%
-%% `?GL_SRC2_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner two's alpha source. The initial value is `?GL_CONSTANT'. 
-%%
-%% `?GL_OPERAND0_RGB':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner zero's RGB operand. The initial value is `?GL_SRC_COLOR'. 
-%%
-%% `?GL_OPERAND1_RGB':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner one's RGB operand. The initial value is `?GL_SRC_COLOR'. 
-%%
-%% `?GL_OPERAND2_RGB':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner two's RGB operand. The initial value is `?GL_SRC_ALPHA'. 
-%%
-%% `?GL_OPERAND0_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner zero's alpha operand. The initial value is `?GL_SRC_ALPHA'. 
-%%
-%% `?GL_OPERAND1_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner one's alpha operand. The initial value is `?GL_SRC_ALPHA'. 
-%%
-%% `?GL_OPERAND2_ALPHA':  `Params'  returns a single symbolic constant value representing
-%% the texture combiner two's alpha operand. The initial value is `?GL_SRC_ALPHA'. 
-%%
-%% `?GL_RGB_SCALE':  `Params'  returns a single floating-point value representing
-%% the current RGB texture combiner scaling factor. The initial value is 1.0. 
-%%
-%% `?GL_ALPHA_SCALE':  `Params'  returns a single floating-point value representing
-%% the current alpha texture combiner scaling factor. The initial value is 1.0. 
-%%
-%% `?GL_COORD_REPLACE':  `Params'  returns a single boolean value representing the
-%% current point sprite texture coordinate replacement enable state. The initial value is `?GL_FALSE'
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTexEnv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetTexEnv.xml">external</a> documentation.
 -spec getTexEnvfv(Target, Pname) -> {float(),float(),float(),float()} when Target :: enum(),Pname :: enum().
 getTexEnvfv(Target,Pname) ->
   call(5256, <<Target:?GLenum,Pname:?GLenum>>).
@@ -6240,218 +2577,7 @@ getTexEnviv(Target,Pname) ->
 %% , `?GL_TEXTURE_2D', `?GL_TEXTURE_1D_ARRAY', `?GL_TEXTURE_2D_ARRAY', `?GL_TEXTURE_RECTANGLE'
 %% , or `?GL_TEXTURE_3D'. The following symbols are accepted in  `Pname' : 
 %%
-%% `?GL_TEXTURE_BASE_LEVEL':  Specifies the index of the lowest defined mipmap level.
-%% This is an integer value. The initial value is 0. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_BORDER_COLOR':  The data in  `Params'  specifies four values that
-%% define the border values that should be used for border texels. If a texel is sampled
-%% from the border of the texture, the values of `?GL_TEXTURE_BORDER_COLOR' are interpreted
-%% as an RGBA color to match the texture's internal format and substituted for the non-existent
-%% texel data. If the texture contains depth components, the first component of `?GL_TEXTURE_BORDER_COLOR'
-%%  is interpreted as a depth value. The initial value is ( 0.0, 0.0, 0.0, 0.0 ). 
-%%
-%%  If the values for `?GL_TEXTURE_BORDER_COLOR' are specified with ``gl:texParameterIiv''
-%%  or ``gl:texParameterIuiv'', the values are stored unmodified with an internal data
-%% type of integer. If specified with ``gl:texParameteriv'', they are converted to floating
-%% point with the following equation:  f=2 c+1 2 b-/1. If specified with ``gl:texParameterfv''
-%% , they are stored unmodified as floating-point values. 
-%%
-%% `?GL_TEXTURE_COMPARE_FUNC':  Specifies the comparison operator used when `?GL_TEXTURE_COMPARE_MODE'
-%%  is set to `?GL_COMPARE_REF_TO_TEXTURE'. Permissible values are: <table><tbody><tr><td>
-%% ` Texture Comparison Function '</td><td>` Computed result  '</td></tr></tbody><tbody>
-%% <tr><td>`?GL_LEQUAL'</td><td> result={1.0 0.0    r&lt;=(D t) r&gt;(D t))</td></tr><tr><td>`?GL_GEQUAL'</td><td>
-%% result={1.0 0.0    r&gt;=(D t) r&lt;(D t))</td></tr><tr><td>`?GL_LESS'</td><td> result={1.0 0.0    r&lt;(D t) r&gt;=(D t))</td></tr><tr><td>`?GL_GREATER'
-%% </td><td> result={1.0 0.0    r&gt;(D t) r&lt;=(D t))</td></tr><tr><td>`?GL_EQUAL'</td><td> result={1.0 0.0    r=(D t) r&amp;ne;
-%% (D t))</td></tr><tr><td>`?GL_NOTEQUAL'
-%% </td><td> result={1.0 0.0    r&amp;ne;(D t) r=(D t))</td></tr><tr><td>`?GL_ALWAYS'</td><td> result=1.0</td></tr><tr><td>
-%% `?GL_NEVER'</td><td> result=0.0</td></tr></tbody></table> where  r is the current
-%% interpolated texture coordinate, and   D t is the depth texture value sampled from the
-%% currently bound depth texture.  result is assigned to the the red channel. 
-%%
-%% `?GL_TEXTURE_COMPARE_MODE':  Specifies the texture comparison mode for currently
-%% bound depth textures. That is, a texture whose internal format is `?GL_DEPTH_COMPONENT_*'
-%% ; see  {@link gl:texImage2D/9} ) Permissible values are: 
-%%
-%% `?GL_COMPARE_REF_TO_TEXTURE':  Specifies that the interpolated and clamped   r texture
-%% coordinate should be compared to the value in the currently bound depth texture. See the
-%% discussion of `?GL_TEXTURE_COMPARE_FUNC' for details of how the comparison is evaluated.
-%% The result of the comparison is assigned to the red channel. 
-%%
-%% `?GL_NONE':  Specifies that the red channel should be assigned the appropriate value
-%% from the currently bound depth texture. 
-%%
-%% `?GL_TEXTURE_LOD_BIAS':  `Params'  specifies a fixed bias value that is to be
-%% added to the level-of-detail parameter for the texture before texture sampling. The specified
-%% value is added to the shader-supplied bias value (if any) and subsequently clamped into
-%% the implementation-defined range [( -  bias max)(bias max)], where  bias max is the value of the implementation
-%% defined constant `?GL_MAX_TEXTURE_LOD_BIAS'. The initial value is 0.0. 
-%%
-%% `?GL_TEXTURE_MIN_FILTER':  The texture minifying function is used whenever the level-of-detail
-%% function used when sampling from the texture determines that the texture should be minified.
-%% There are six defined minifying functions. Two of them use either the nearest texture
-%% elements or a weighted average of multiple texture elements to compute the texture value.
-%% The other four use mipmaps. 
-%%
-%%  A mipmap is an ordered set of arrays representing the same image at progressively lower
-%% resolutions. If the texture has dimensions   2 n×2 m, there are  max(n m)+1 mipmaps. The first
-%% mipmap is the original texture, with dimensions   2 n×2 m. Each subsequent mipmap has
-%% dimensions   2(k-1)×2(l-1), where   2 k×2 l are the dimensions of the previous mipmap, until either
-%%   k=0 or   l=0. At that point, subsequent mipmaps have dimension   1×2(l-1) or   2(k-1)×1 until
-%% the final mipmap, which has dimension   1×1. To define the mipmaps, call  {@link gl:texImage1D/8} 
-%% ,  {@link gl:texImage2D/9} ,  {@link gl:texImage3D/10} ,  {@link gl:copyTexImage1D/7} , or  {@link gl:copyTexImage2D/8} 
-%%  with the `level' argument indicating the order of the mipmaps. Level 0 is the original
-%% texture; level   max(n m) is the final   1×1 mipmap. 
-%%
-%%  `Params'  supplies a function for minifying the texture as one of the following: 
-%%
-%% `?GL_NEAREST':  Returns the value of the texture element that is nearest (in Manhattan
-%% distance) to the specified texture coordinates. 
-%%
-%% `?GL_LINEAR':  Returns the weighted average of the four texture elements that are
-%% closest to the specified texture coordinates. These can include items wrapped or repeated
-%% from other parts of a texture, depending on the values of `?GL_TEXTURE_WRAP_S' and `?GL_TEXTURE_WRAP_T'
-%% , and on the exact mapping. 
-%%
-%% `?GL_NEAREST_MIPMAP_NEAREST':  Chooses the mipmap that most closely matches the size
-%% of the pixel being textured and uses the `?GL_NEAREST' criterion (the texture element
-%% closest to the specified texture coordinates) to produce a texture value. 
-%%
-%% `?GL_LINEAR_MIPMAP_NEAREST':  Chooses the mipmap that most closely matches the size
-%% of the pixel being textured and uses the `?GL_LINEAR' criterion (a weighted average
-%% of the four texture elements that are closest to the specified texture coordinates) to
-%% produce a texture value. 
-%%
-%% `?GL_NEAREST_MIPMAP_LINEAR':  Chooses the two mipmaps that most closely match the
-%% size of the pixel being textured and uses the `?GL_NEAREST' criterion (the texture
-%% element closest to the specified texture coordinates ) to produce a texture value from
-%% each mipmap. The final texture value is a weighted average of those two values. 
-%%
-%% `?GL_LINEAR_MIPMAP_LINEAR':  Chooses the two mipmaps that most closely match the
-%% size of the pixel being textured and uses the `?GL_LINEAR' criterion (a weighted
-%% average of the texture elements that are closest to the specified texture coordinates)
-%% to produce a texture value from each mipmap. The final texture value is a weighted average
-%% of those two values. 
-%%
-%%  As more texture elements are sampled in the minification process, fewer aliasing artifacts
-%% will be apparent. While the `?GL_NEAREST' and `?GL_LINEAR' minification functions
-%% can be faster than the other four, they sample only one or multiple texture elements to
-%% determine the texture value of the pixel being rendered and can produce moire patterns
-%% or ragged transitions. The initial value of `?GL_TEXTURE_MIN_FILTER' is `?GL_NEAREST_MIPMAP_LINEAR'
-%% . 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_MAG_FILTER':  The texture magnification function is used whenever the
-%% level-of-detail function used when sampling from the texture determines that the texture
-%% should be magified. It sets the texture magnification function to either `?GL_NEAREST'
-%%  or `?GL_LINEAR' (see below). `?GL_NEAREST' is generally faster than `?GL_LINEAR'
-%% , but it can produce textured images with sharper edges because the transition between
-%% texture elements is not as smooth. The initial value of `?GL_TEXTURE_MAG_FILTER' is `?GL_LINEAR'
-%% . 
-%%
-%% `?GL_NEAREST':  Returns the value of the texture element that is nearest (in Manhattan
-%% distance) to the specified texture coordinates. 
-%%
-%% `?GL_LINEAR':  Returns the weighted average of the texture elements that are closest
-%% to the specified texture coordinates. These can include items wrapped or repeated from
-%% other parts of a texture, depending on the values of `?GL_TEXTURE_WRAP_S' and `?GL_TEXTURE_WRAP_T'
-%% , and on the exact mapping. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_MIN_LOD':  Sets the minimum level-of-detail parameter. This floating-point
-%% value limits the selection of highest resolution mipmap (lowest mipmap level). The initial
-%% value is -1000. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_MAX_LOD':  Sets the maximum level-of-detail parameter. This floating-point
-%% value limits the selection of the lowest resolution mipmap (highest mipmap level). The
-%% initial value is 1000. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_MAX_LEVEL':  Sets the index of the highest defined mipmap level. This
-%% is an integer value. The initial value is 1000. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_SWIZZLE_R':  Sets the swizzle that will be applied to the  r component
-%% of a texel before it is returned to the shader. Valid values for  `Param'  are `?GL_RED'
-%% , `?GL_GREEN', `?GL_BLUE', `?GL_ALPHA', `?GL_ZERO' and `?GL_ONE'.
-%% If `?GL_TEXTURE_SWIZZLE_R' is `?GL_RED', the value for  r will be taken from
-%% the first channel of the fetched texel. If `?GL_TEXTURE_SWIZZLE_R' is `?GL_GREEN'
-%% , the value for  r will be taken from the second channel of the fetched texel. If `?GL_TEXTURE_SWIZZLE_R'
-%%  is `?GL_BLUE', the value for  r will be taken from the third channel of the fetched
-%% texel. If `?GL_TEXTURE_SWIZZLE_R' is `?GL_ALPHA', the value for  r will be taken
-%% from the fourth channel of the fetched texel. If `?GL_TEXTURE_SWIZZLE_R' is `?GL_ZERO'
-%% , the value for  r will be subtituted with  0.0. If `?GL_TEXTURE_SWIZZLE_R' is `?GL_ONE'
-%% , the value for  r will be subtituted with  1.0. The initial value is `?GL_RED'. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_SWIZZLE_G':  Sets the swizzle that will be applied to the  g component
-%% of a texel before it is returned to the shader. Valid values for  `Param'  and their
-%% effects are similar to those of `?GL_TEXTURE_SWIZZLE_R'. The initial value is `?GL_GREEN'
-%% . 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_SWIZZLE_B':  Sets the swizzle that will be applied to the  b component
-%% of a texel before it is returned to the shader. Valid values for  `Param'  and their
-%% effects are similar to those of `?GL_TEXTURE_SWIZZLE_R'. The initial value is `?GL_BLUE'
-%% . 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_SWIZZLE_A':  Sets the swizzle that will be applied to the  a component
-%% of a texel before it is returned to the shader. Valid values for  `Param'  and their
-%% effects are similar to those of `?GL_TEXTURE_SWIZZLE_R'. The initial value is `?GL_ALPHA'
-%% . 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_SWIZZLE_RGBA':  Sets the swizzles that will be applied to the  r,  g, 
-%% b, and  a components of a texel before they are returned to the shader. Valid values for  `Params' 
-%%  and their effects are similar to those of `?GL_TEXTURE_SWIZZLE_R', except that all
-%% channels are specified simultaneously. Setting the value of `?GL_TEXTURE_SWIZZLE_RGBA'
-%%  is equivalent (assuming no errors are generated) to setting the parameters of each of `?GL_TEXTURE_SWIZZLE_R'
-%% , `?GL_TEXTURE_SWIZZLE_G', `?GL_TEXTURE_SWIZZLE_B', and `?GL_TEXTURE_SWIZZLE_A'
-%%  successively. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_WRAP_S':  Sets the wrap parameter for texture coordinate   s to either `?GL_CLAMP_TO_EDGE'
-%% , `?GL_CLAMP_TO_BORDER', `?GL_MIRRORED_REPEAT', or `?GL_REPEAT'. `?GL_CLAMP_TO_EDGE'
-%%  causes   s coordinates to be clamped to the range  [(1 2/N) 1-(1 2/N)], where   N is the size of the texture
-%% in the direction of clamping. `?GL_CLAMP_TO_BORDER' evaluates  s coordinates in a
-%% similar manner to `?GL_CLAMP_TO_EDGE'. However, in cases where clamping would have
-%% occurred in `?GL_CLAMP_TO_EDGE' mode, the fetched texel data is substituted with
-%% the values specified by `?GL_TEXTURE_BORDER_COLOR'. `?GL_REPEAT' causes the
-%% integer part of the   s coordinate to be ignored; the GL uses only the fractional part,
-%% thereby creating a repeating pattern. `?GL_MIRRORED_REPEAT' causes the   s coordinate
-%% to be set to the fractional part of the texture coordinate if the integer part of   s
-%% is even; if the integer part of   s is odd, then the   s texture coordinate is set to   1-
-%% frac(s), where   frac(s) represents the fractional part of  s. Initially, `?GL_TEXTURE_WRAP_S'
-%%  is set to `?GL_REPEAT'. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_WRAP_T':  Sets the wrap parameter for texture coordinate   t to either `?GL_CLAMP_TO_EDGE'
-%% , `?GL_CLAMP_TO_BORDER', `?GL_MIRRORED_REPEAT', or `?GL_REPEAT'. See the
-%% discussion under `?GL_TEXTURE_WRAP_S'. Initially, `?GL_TEXTURE_WRAP_T' is set
-%% to `?GL_REPEAT'. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_WRAP_R':  Sets the wrap parameter for texture coordinate   r to either `?GL_CLAMP_TO_EDGE'
-%% , `?GL_CLAMP_TO_BORDER', `?GL_MIRRORED_REPEAT', or `?GL_REPEAT'. See the
-%% discussion under `?GL_TEXTURE_WRAP_S'. Initially, `?GL_TEXTURE_WRAP_R' is set
-%% to `?GL_REPEAT'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexParameter.xhtml">external</a> documentation.
 -spec texParameterf(Target, Pname, Param) -> 'ok' when Target :: enum(),Pname :: enum(),Param :: float().
 texParameterf(Target,Pname,Param) ->
   cast(5258, <<Target:?GLenum,Pname:?GLenum,Param:?GLfloat>>).
@@ -6486,70 +2612,7 @@ texParameteriv(Target,Pname,Params) ->
 %% rectangle, cube-mapped or cube-mapped array texturing, respectively.  `Pname'  accepts
 %% the same symbols as  {@link gl:texParameterf/3} , with the same interpretations: 
 %%
-%% `?GL_TEXTURE_MAG_FILTER':  Returns the single-valued texture magnification filter,
-%% a symbolic constant. The initial value is `?GL_LINEAR'. 
-%%
-%% `?GL_TEXTURE_MIN_FILTER':  Returns the single-valued texture minification filter,
-%% a symbolic constant. The initial value is `?GL_NEAREST_MIPMAP_LINEAR'. 
-%%
-%% `?GL_TEXTURE_MIN_LOD':  Returns the single-valued texture minimum level-of-detail
-%% value. The initial value is   -1000. 
-%%
-%% `?GL_TEXTURE_MAX_LOD':  Returns the single-valued texture maximum level-of-detail
-%% value. The initial value is 1000. 
-%%
-%% `?GL_TEXTURE_BASE_LEVEL':  Returns the single-valued base texture mipmap level. The
-%% initial value is 0. 
-%%
-%% `?GL_TEXTURE_MAX_LEVEL':  Returns the single-valued maximum texture mipmap array
-%% level. The initial value is 1000. 
-%%
-%% `?GL_TEXTURE_SWIZZLE_R':  Returns the red component swizzle. The initial value is `?GL_RED'
-%% . 
-%%
-%% `?GL_TEXTURE_SWIZZLE_G':  Returns the green component swizzle. The initial value is `?GL_GREEN'
-%% . 
-%%
-%% `?GL_TEXTURE_SWIZZLE_B':  Returns the blue component swizzle. The initial value is `?GL_BLUE'
-%% . 
-%%
-%% `?GL_TEXTURE_SWIZZLE_A':  Returns the alpha component swizzle. The initial value is `?GL_ALPHA'
-%% . 
-%%
-%% `?GL_TEXTURE_SWIZZLE_RGBA':  Returns the component swizzle for all channels in a
-%% single query. 
-%%
-%% `?GL_TEXTURE_WRAP_S':  Returns the single-valued wrapping function for texture coordinate
-%%   s, a symbolic constant. The initial value is `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_WRAP_T':  Returns the single-valued wrapping function for texture coordinate
-%%   t, a symbolic constant. The initial value is `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_WRAP_R':  Returns the single-valued wrapping function for texture coordinate
-%%   r, a symbolic constant. The initial value is `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_BORDER_COLOR':  Returns four integer or floating-point numbers that
-%% comprise the RGBA color of the texture border. Floating-point values are returned in the
-%% range  [0 1]. Integer values are returned as a linear mapping of the internal floating-point
-%% representation such that 1.0 maps to the most positive representable integer and   -1.0
-%% maps to the most negative representable integer. The initial value is (0, 0, 0, 0). 
-%%
-%% `?GL_TEXTURE_COMPARE_MODE':  Returns a single-valued texture comparison mode, a symbolic
-%% constant. The initial value is `?GL_NONE'. See  {@link gl:texParameterf/3} . 
-%%
-%% `?GL_TEXTURE_COMPARE_FUNC':  Returns a single-valued texture comparison function,
-%% a symbolic constant. The initial value is `?GL_LEQUAL'. See  {@link gl:texParameterf/3} .
-%% 
-%%
-%%  In addition to the parameters that may be set with  {@link gl:texParameterf/3} , ``gl:getTexParameter''
-%%  accepts the following read-only parameters: 
-%%
-%% `?GL_TEXTURE_IMMUTABLE_FORMAT':  Returns non-zero if the texture has an immutable
-%% format. Textures become immutable if their storage is specified with  {@link gl:texStorage1D/4} 
-%% ,  {@link gl:texStorage2D/5}  or  {@link gl:texStorage3D/6} . The initial value is `?GL_FALSE'
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTexParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetTexParameter.xhtml">external</a> documentation.
 -spec getTexParameterfv(Target, Pname) -> {float(),float(),float(),float()} when Target :: enum(),Pname :: enum().
 getTexParameterfv(Target,Pname) ->
   call(5262, <<Target:?GLenum,Pname:?GLenum>>).
@@ -6570,67 +2633,7 @@ getTexParameteriv(Target,Pname) ->
 %% , `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z', `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z', or `?GL_PROXY_TEXTURE_CUBE_MAP'
 %% . 
 %%
-%% `?GL_MAX_TEXTURE_SIZE', and `?GL_MAX_3D_TEXTURE_SIZE' are not really descriptive
-%% enough. It has to report the largest square texture image that can be accommodated with
-%% mipmaps and borders, but a long skinny texture, or a texture without mipmaps and borders,
-%% may easily fit in texture memory. The proxy targets allow the user to more accurately
-%% query whether the GL can accommodate a texture of a given configuration. If the texture
-%% cannot be accommodated, the texture state variables, which may be queried with ``gl:getTexLevelParameter''
-%% , are set to 0. If the texture can be accommodated, the texture state values will be set
-%% as they would be set for a non-proxy target. 
-%%
-%%  `Pname'  specifies the texture parameter whose value or values will be returned. 
-%%
-%%  The accepted parameter names are as follows: 
-%%
-%% `?GL_TEXTURE_WIDTH':  `Params'  returns a single value, the width of the texture
-%% image. This value includes the border of the texture image. The initial value is 0. 
-%%
-%% `?GL_TEXTURE_HEIGHT':  `Params'  returns a single value, the height of the texture
-%% image. This value includes the border of the texture image. The initial value is 0. 
-%%
-%% `?GL_TEXTURE_DEPTH':  `Params'  returns a single value, the depth of the texture
-%% image. This value includes the border of the texture image. The initial value is 0. 
-%%
-%% `?GL_TEXTURE_INTERNAL_FORMAT':  `Params'  returns a single value, the internal
-%% format of the texture image. 
-%%
-%% `?GL_TEXTURE_RED_TYPE',
-%%
-%% `?GL_TEXTURE_GREEN_TYPE',
-%%
-%% `?GL_TEXTURE_BLUE_TYPE',
-%%
-%% `?GL_TEXTURE_ALPHA_TYPE',
-%%
-%% `?GL_TEXTURE_DEPTH_TYPE':  The data type used to store the component. The types `?GL_NONE'
-%% , `?GL_SIGNED_NORMALIZED', `?GL_UNSIGNED_NORMALIZED', `?GL_FLOAT', `?GL_INT'
-%% , and `?GL_UNSIGNED_INT' may be returned to indicate signed normalized fixed-point,
-%% unsigned normalized fixed-point, floating-point, integer unnormalized, and unsigned integer
-%% unnormalized components, respectively. 
-%%
-%% `?GL_TEXTURE_RED_SIZE',
-%%
-%% `?GL_TEXTURE_GREEN_SIZE',
-%%
-%% `?GL_TEXTURE_BLUE_SIZE',
-%%
-%% `?GL_TEXTURE_ALPHA_SIZE',
-%%
-%% `?GL_TEXTURE_DEPTH_SIZE':  The internal storage resolution of an individual component.
-%% The resolution chosen by the GL will be a close match for the resolution requested by
-%% the user with the component argument of  {@link gl:texImage1D/8} ,  {@link gl:texImage2D/9} ,  {@link gl:texImage3D/10} 
-%% ,  {@link gl:copyTexImage1D/7} , and  {@link gl:copyTexImage2D/8} . The initial value is 0. 
-%%
-%% `?GL_TEXTURE_COMPRESSED':  `Params'  returns a single boolean value indicating
-%% if the texture image is stored in a compressed internal format. The initiali value is `?GL_FALSE'
-%% . 
-%%
-%% `?GL_TEXTURE_COMPRESSED_IMAGE_SIZE':  `Params'  returns a single integer value,
-%% the number of unsigned bytes of the compressed texture image that would be returned from  {@link gl:getCompressedTexImage/3} 
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTexLevelParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetTexLevelParameter.xhtml">external</a> documentation.
 -spec getTexLevelParameterfv(Target, Level, Pname) -> {float()} when Target :: enum(),Level :: integer(),Pname :: enum().
 getTexLevelParameterfv(Target,Level,Pname) ->
   call(5264, <<Target:?GLenum,Level:?GLint,Pname:?GLenum>>).
@@ -6647,107 +2650,7 @@ getTexLevelParameteriv(Target,Level,Pname) ->
 %% which texturing is enabled. To enable and disable one-dimensional texturing, call  {@link gl:enable/1} 
 %%  and  {@link gl:enable/1}  with argument `?GL_TEXTURE_1D'. 
 %%
-%%  Texture images are defined with ``gl:texImage1D''. The arguments describe the parameters
-%% of the texture image, such as width, width of the border, level-of-detail number (see  {@link gl:texParameterf/3} 
-%% ), and the internal resolution and format used to store the image. The last three arguments
-%% describe how the image is represented in memory. 
-%%
-%%  If  `Target'  is `?GL_PROXY_TEXTURE_1D', no data is read from  `Data' , but
-%% all of the texture image state is recalculated, checked for consistency, and checked against
-%% the implementation's capabilities. If the implementation cannot handle a texture of the
-%% requested texture size, it sets all of the image state to 0, but does not generate an
-%% error (see  {@link gl:getError/0} ). To query for an entire mipmap array, use an image array
-%% level greater than or equal to 1. 
-%%
-%%  If  `Target'  is `?GL_TEXTURE_1D', data is read from  `Data'  as a sequence
-%% of signed or unsigned bytes, shorts, or longs, or single-precision floating-point values,
-%% depending on  `Type' . These values are grouped into sets of one, two, three, or four
-%% values, depending on  `Format' , to form elements. Each data byte is treated as eight
-%% 1-bit elements, with bit ordering determined by `?GL_UNPACK_LSB_FIRST' (see  {@link gl:pixelStoref/2} 
-%% ). 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  The first element corresponds to the left end of the texture array. Subsequent elements
-%% progress left-to-right through the remaining texels in the texture array. The final element
-%% corresponds to the right end of the texture array. 
-%%
-%%  `Format'  determines the composition of each element in  `Data' . It can assume
-%% one of these symbolic values: 
-%%
-%% `?GL_RED':  Each element is a single red component. The GL converts it to floating
-%% point and assembles it into an RGBA element by attaching 0 for green and blue, and 1 for
-%% alpha. Each component is then multiplied by the signed scale factor `?GL_c_SCALE',
-%% added to the signed bias `?GL_c_BIAS', and clamped to the range [0,1]. 
-%%
-%% `?GL_RG':  Each element is a single red/green double The GL converts it to floating
-%% point and assembles it into an RGBA element by attaching 0 for blue, and 1 for alpha.
-%% Each component is then multiplied by the signed scale factor `?GL_c_SCALE', added
-%% to the signed bias `?GL_c_BIAS', and clamped to the range [0,1]. 
-%%
-%% `?GL_RGB'
-%%
-%% `?GL_BGR':  Each element is an RGB triple. The GL converts it to floating point and
-%% assembles it into an RGBA element by attaching 1 for alpha. Each component is then multiplied
-%% by the signed scale factor `?GL_c_SCALE', added to the signed bias `?GL_c_BIAS',
-%% and clamped to the range [0,1]. 
-%%
-%% `?GL_RGBA'
-%%
-%% `?GL_BGRA':  Each element contains all four components. Each component is multiplied
-%% by the signed scale factor `?GL_c_SCALE', added to the signed bias `?GL_c_BIAS',
-%% and clamped to the range [0,1]. 
-%%
-%% `?GL_DEPTH_COMPONENT':  Each element is a single depth value. The GL converts it
-%% to floating point, multiplies by the signed scale factor `?GL_DEPTH_SCALE', adds
-%% the signed bias `?GL_DEPTH_BIAS', and clamps to the range [0,1]. 
-%%
-%%  If an application wants to store the texture at a certain resolution or in a certain
-%% format, it can request the resolution and format with  `InternalFormat' . The GL will
-%% choose an internal representation that closely approximates that requested by  `InternalFormat' 
-%% , but it may not match exactly. (The representations specified by `?GL_RED', `?GL_RG'
-%% , `?GL_RGB' and `?GL_RGBA' must match exactly.) 
-%%
-%%  `InternalFormat'  may be one of the base internal formats shown in Table 1, below 
-%%
-%%  `InternalFormat'  may also be one of the sized internal formats shown in Table 2,
-%% below 
-%%
-%%  Finally,  `InternalFormat'  may also be one of the generic or compressed compressed
-%% texture formats shown in Table 3 below 
-%%
-%%   If the  `InternalFormat'  parameter is one of the generic compressed formats,  `?GL_COMPRESSED_RED'
-%% , `?GL_COMPRESSED_RG',  `?GL_COMPRESSED_RGB', or  `?GL_COMPRESSED_RGBA',
-%% the GL will replace the internal format with the symbolic constant for a specific internal
-%% format and compress the texture before storage. If no corresponding internal format is
-%% available, or the GL can not compress that image for any reason, the internal format is
-%% instead replaced with a corresponding base internal format. 
-%%
-%%  If the  `InternalFormat'  parameter is     `?GL_SRGB',    `?GL_SRGB8',    `?GL_SRGB_ALPHA'
-%% or    `?GL_SRGB8_ALPHA8', the texture is treated as if the red, green, or blue components
-%% are encoded in the sRGB color space. Any alpha component is left unchanged. The conversion
-%% from the sRGB encoded component      c s    to a linear component      c l is:   
-%%
-%%  c l={ c s/12.92if c s&amp;le; 0.04045( c s+0.055/1.055) 2.4if c s&gt; 0.04045
-%%
-%%     Assume        c s    is the sRGB component in the range [0,1]. 
-%%
-%%  Use the `?GL_PROXY_TEXTURE_1D' target to try out a resolution and format. The implementation
-%% will update and recompute its best match for the requested storage resolution and format.
-%% To then query this state, call  {@link gl:getTexLevelParameterfv/3} . If the texture cannot
-%% be accommodated, texture state is set to 0. 
-%%
-%%  A one-component texture image uses only the red component of the RGBA color from  `Data' 
-%% . A two-component image uses the R and A values. A three-component image uses the R, G,
-%% and B values. A four-component image uses all of the RGBA components. 
-%%
-%%  Image-based shadowing can be enabled by comparing texture r coordinates to depth texture
-%% values to generate a boolean result. See  {@link gl:texParameterf/3}  for details on texture
-%% comparison. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexImage1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexImage1D.xhtml">external</a> documentation.
 -spec texImage1D(Target, Level, InternalFormat, Width, Border, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),InternalFormat :: integer(),Width :: integer(),Border :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 texImage1D(Target,Level,InternalFormat,Width,Border,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5266, <<Target:?GLenum,Level:?GLint,InternalFormat:?GLint,Width:?GLsizei,Border:?GLint,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -6759,117 +2662,7 @@ texImage1D(Target,Level,InternalFormat,Width,Border,Format,Type,Pixels) ->
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%%  To define texture images, call ``gl:texImage2D''. The arguments describe the parameters
-%% of the texture image, such as height, width, width of the border, level-of-detail number
-%% (see  {@link gl:texParameterf/3} ), and number of color components provided. The last three
-%% arguments describe how the image is represented in memory. 
-%%
-%%  If  `Target'  is `?GL_PROXY_TEXTURE_2D', `?GL_PROXY_TEXTURE_1D_ARRAY', `?GL_PROXY_TEXTURE_CUBE_MAP'
-%% , or `?GL_PROXY_TEXTURE_RECTANGLE', no data is read from  `Data' , but all of
-%% the texture image state is recalculated, checked for consistency, and checked against
-%% the implementation's capabilities. If the implementation cannot handle a texture of the
-%% requested texture size, it sets all of the image state to 0, but does not generate an
-%% error (see  {@link gl:getError/0} ). To query for an entire mipmap array, use an image array
-%% level greater than or equal to 1. 
-%%
-%%  If  `Target'  is `?GL_TEXTURE_2D', `?GL_TEXTURE_RECTANGLE' or one of the `?GL_TEXTURE_CUBE_MAP'
-%%  targets, data is read from  `Data'  as a sequence of signed or unsigned bytes, shorts,
-%% or longs, or single-precision floating-point values, depending on  `Type' . These values
-%% are grouped into sets of one, two, three, or four values, depending on  `Format' ,
-%% to form elements. Each data byte is treated as eight 1-bit elements, with bit ordering
-%% determined by `?GL_UNPACK_LSB_FIRST' (see  {@link gl:pixelStoref/2} ). 
-%%
-%%  If  `Target'  is `?GL_TEXTURE_1D_ARRAY', data is interpreted as an array of one-dimensional
-%% images. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  The first element corresponds to the lower left corner of the texture image. Subsequent
-%% elements progress left-to-right through the remaining texels in the lowest row of the
-%% texture image, and then in successively higher rows of the texture image. The final element
-%% corresponds to the upper right corner of the texture image. 
-%%
-%%  `Format'  determines the composition of each element in  `Data' . It can assume
-%% one of these symbolic values: 
-%%
-%% `?GL_RED':  Each element is a single red component. The GL converts it to floating
-%% point and assembles it into an RGBA element by attaching 0 for green and blue, and 1 for
-%% alpha. Each component is then multiplied by the signed scale factor `?GL_c_SCALE',
-%% added to the signed bias `?GL_c_BIAS', and clamped to the range [0,1]. 
-%%
-%% `?GL_RG':  Each element is a red/green double. The GL converts it to floating point
-%% and assembles it into an RGBA element by attaching 0 for blue, and 1 for alpha. Each component
-%% is then multiplied by the signed scale factor `?GL_c_SCALE', added to the signed
-%% bias `?GL_c_BIAS', and clamped to the range [0,1]. 
-%%
-%% `?GL_RGB'
-%%
-%% `?GL_BGR':  Each element is an RGB triple. The GL converts it to floating point and
-%% assembles it into an RGBA element by attaching 1 for alpha. Each component is then multiplied
-%% by the signed scale factor `?GL_c_SCALE', added to the signed bias `?GL_c_BIAS',
-%% and clamped to the range [0,1]. 
-%%
-%% `?GL_RGBA'
-%%
-%% `?GL_BGRA':  Each element contains all four components. Each component is multiplied
-%% by the signed scale factor `?GL_c_SCALE', added to the signed bias `?GL_c_BIAS',
-%% and clamped to the range [0,1]. 
-%%
-%% `?GL_DEPTH_COMPONENT':  Each element is a single depth value. The GL converts it
-%% to floating point, multiplies by the signed scale factor `?GL_DEPTH_SCALE', adds
-%% the signed bias `?GL_DEPTH_BIAS', and clamps to the range [0,1]. 
-%%
-%% `?GL_DEPTH_STENCIL':  Each element is a pair of depth and stencil values. The depth
-%% component of the pair is interpreted as in `?GL_DEPTH_COMPONENT'. The stencil component
-%% is interpreted based on specified the depth + stencil internal format. 
-%%
-%%  If an application wants to store the texture at a certain resolution or in a certain
-%% format, it can request the resolution and format with  `InternalFormat' . The GL will
-%% choose an internal representation that closely approximates that requested by  `InternalFormat' 
-%% , but it may not match exactly. (The representations specified by `?GL_RED', `?GL_RG'
-%% , `?GL_RGB', and `?GL_RGBA' must match exactly.) 
-%%
-%%  `InternalFormat'  may be one of the base internal formats shown in Table 1, below 
-%%
-%%  `InternalFormat'  may also be one of the sized internal formats shown in Table 2,
-%% below 
-%%
-%%  Finally,  `InternalFormat'  may also be one of the generic or compressed compressed
-%% texture formats shown in Table 3 below 
-%%
-%%  If the  `InternalFormat'  parameter is one of the generic compressed formats, `?GL_COMPRESSED_RED'
-%% , `?GL_COMPRESSED_RG', `?GL_COMPRESSED_RGB', or `?GL_COMPRESSED_RGBA',
-%% the GL will replace the internal format with the symbolic constant for a specific internal
-%% format and compress the texture before storage. If no corresponding internal format is
-%% available, or the GL can not compress that image for any reason, the internal format is
-%% instead replaced with a corresponding base internal format. 
-%%
-%%  If the  `InternalFormat'  parameter is  `?GL_SRGB', `?GL_SRGB8', `?GL_SRGB_ALPHA'
-%% , or `?GL_SRGB8_ALPHA8', the texture is treated as if the red, green, or blue components
-%% are encoded in the sRGB color space. Any alpha component is left unchanged. The conversion
-%% from the sRGB encoded component   c s to a linear component   c l is: 
-%%
-%%  c l={ c s/12.92if c s&amp;le; 0.04045( c s+0.055/1.055) 2.4if c s&gt; 0.04045
-%%
-%%  Assume   c s is the sRGB component in the range [0,1]. 
-%%
-%%  Use the `?GL_PROXY_TEXTURE_2D', `?GL_PROXY_TEXTURE_1D_ARRAY', `?GL_PROXY_TEXTURE_RECTANGLE'
-%% , or `?GL_PROXY_TEXTURE_CUBE_MAP' target to try out a resolution and format. The
-%% implementation will update and recompute its best match for the requested storage resolution
-%% and format. To then query this state, call  {@link gl:getTexLevelParameterfv/3} . If the texture
-%% cannot be accommodated, texture state is set to 0. 
-%%
-%%  A one-component texture image uses only the red component of the RGBA color extracted
-%% from  `Data' . A two-component image uses the R and G values. A three-component image
-%% uses the R, G, and B values. A four-component image uses all of the RGBA components. 
-%%
-%%  Image-based shadowing can be enabled by comparing texture r coordinates to depth texture
-%% values to generate a boolean result. See  {@link gl:texParameterf/3}  for details on texture
-%% comparison. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexImage2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexImage2D.xhtml">external</a> documentation.
 -spec texImage2D(Target, Level, InternalFormat, Width, Height, Border, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),InternalFormat :: integer(),Width :: integer(),Height :: integer(),Border :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 texImage2D(Target,Level,InternalFormat,Width,Height,Border,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5268, <<Target:?GLenum,Level:?GLint,InternalFormat:?GLint,Width:?GLsizei,Height:?GLsizei,Border:?GLint,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -6888,33 +2681,7 @@ texImage2D(Target,Level,InternalFormat,Width,Height,Border,Format,Type,Pixels) -
 %% array. See the reference page for  {@link gl:texImage1D/8}  for a description of the acceptable
 %% values for the  `Format'  and  `Type'  parameters, respectively. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is requested,  `Img'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  To understand the operation of ``gl:getTexImage'', consider the selected internal four-component
-%% texture image to be an RGBA color buffer the size of the image. The semantics of ``gl:getTexImage''
-%%  are then identical to those of  {@link gl:readPixels/7} , with the exception that no pixel
-%% transfer operations are performed, when called with the same  `Format'  and  `Type' ,
-%% with `x' and `y' set to 0, `width' set to the width of the texture image
-%% and `height' set to 1 for 1D images, or to the height of the texture image for 2D
-%% images. 
-%%
-%%  If the selected texture image does not contain four components, the following mappings
-%% are applied. Single-component textures are treated as RGBA buffers with red set to the
-%% single-component value, green set to 0, blue set to 0, and alpha set to 1. Two-component
-%% textures are treated as RGBA buffers with red set to the value of component zero, alpha
-%% set to the value of component one, and green and blue set to 0. Finally, three-component
-%% textures are treated as RGBA buffers with red set to component zero, green set to component
-%% one, blue set to component two, and alpha set to 1. 
-%%
-%%  To determine the required size of  `Img' , use  {@link gl:getTexLevelParameterfv/3}  to
-%% determine the dimensions of the internal texture image, then scale the required number
-%% of pixels by the storage required for each pixel, based on  `Format'  and  `Type' .
-%% Be sure to take the pixel storage parameters into account, especially `?GL_PACK_ALIGNMENT'
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTexImage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetTexImage.xhtml">external</a> documentation.
 -spec getTexImage(Target, Level, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),Format :: enum(),Type :: enum(),Pixels :: mem().
 getTexImage(Target,Level,Format,Type,Pixels) ->
   send_bin(Pixels),
@@ -6926,13 +2693,7 @@ getTexImage(Target,Level,Format,Type,Pixels) ->
 %% that the names form a contiguous set of integers; however, it is guaranteed that none
 %% of the returned names was in use immediately before the call to ``gl:genTextures''. 
 %%
-%%  The generated textures have no dimensionality; they assume the dimensionality of the
-%% texture target to which they are first bound (see  {@link gl:bindTexture/2} ). 
-%%
-%%  Texture names returned by a call to ``gl:genTextures'' are not returned by subsequent
-%% calls, unless they are first deleted with  {@link gl:deleteTextures/1} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenTextures.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenTextures.xhtml">external</a> documentation.
 -spec genTextures(N) -> [integer()] when N :: integer().
 genTextures(N) ->
   call(5271, <<N:?GLsizei>>).
@@ -6944,10 +2705,7 @@ genTextures(N) ->
 %% for reuse (for example by  {@link gl:genTextures/1} ). If a texture that is currently bound
 %% is deleted, the binding reverts to 0 (the default texture). 
 %%
-%% ``gl:deleteTextures'' silently ignores 0's and names that do not correspond to existing
-%% textures. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteTextures.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteTextures.xhtml">external</a> documentation.
 -spec deleteTextures(Textures) -> 'ok' when Textures :: [integer()].
 deleteTextures(Textures) ->
   TexturesLen = length(Textures),
@@ -6964,43 +2722,7 @@ deleteTextures(Textures) ->
 %% When a texture is bound to a target, the previous binding for that target is automatically
 %% broken. 
 %%
-%%  Texture names are unsigned integers. The value zero is reserved to represent the default
-%% texture for each texture target. Texture names and the corresponding texture contents
-%% are local to the shared object space of the current GL rendering context; two rendering
-%% contexts share texture names only if they explicitly enable sharing between contexts through
-%% the appropriate GL windows interfaces functions. 
-%%
-%%  You must use  {@link gl:genTextures/1}  to generate a set of new texture names. 
-%%
-%%  When a texture is first bound, it assumes the specified target: A texture first bound
-%% to `?GL_TEXTURE_1D' becomes one-dimensional texture, a texture first bound to `?GL_TEXTURE_2D'
-%%  becomes two-dimensional texture, a texture first bound to `?GL_TEXTURE_3D' becomes
-%% three-dimensional texture, a texture first bound to `?GL_TEXTURE_1D_ARRAY' becomes
-%% one-dimensional array texture, a texture first bound to `?GL_TEXTURE_2D_ARRAY' becomes
-%% two-dimensional arary texture, a texture first bound to `?GL_TEXTURE_RECTANGLE' becomes
-%% rectangle texture, a, texture first bound to `?GL_TEXTURE_CUBE_MAP' becomes a cube-mapped
-%% texture, a texture first bound to `?GL_TEXTURE_2D_MULTISAMPLE' becomes a two-dimensional
-%% multisampled texture, and a texture first bound to `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY'
-%% becomes a two-dimensional multisampled array texture. The state of a one-dimensional texture
-%% immediately after it is first bound is equivalent to the state of the default `?GL_TEXTURE_1D'
-%%  at GL initialization, and similarly for the other texture types. 
-%%
-%%  While a texture is bound, GL operations on the target to which it is bound affect the
-%% bound texture, and queries of the target to which it is bound return state from the bound
-%% texture.  In effect, the texture targets become aliases for the textures currently bound
-%% to them, and the texture name zero refers to the default textures that were bound to them
-%% at initialization. 
-%%
-%%  A texture binding created with ``gl:bindTexture'' remains active until a different
-%% texture is bound to the same target, or until the bound texture is deleted with  {@link gl:deleteTextures/1} 
-%% . 
-%%
-%%  Once created, a named texture may be re-bound to its same original target as often as
-%% needed. It is usually much faster to use ``gl:bindTexture'' to bind an existing named
-%% texture to one of the texture targets than it is to reload the texture image using  {@link gl:texImage1D/8} 
-%% ,  {@link gl:texImage2D/9} ,  {@link gl:texImage3D/10}  or another similar function. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindTexture.xhtml">external</a> documentation.
 -spec bindTexture(Target, Texture) -> 'ok' when Target :: enum(),Texture :: integer().
 bindTexture(Target,Texture) ->
   cast(5273, <<Target:?GLenum,Texture:?GLuint>>).
@@ -7010,26 +2732,7 @@ bindTexture(Target,Texture) ->
 %% ``gl:prioritizeTextures'' assigns the  `N'  texture priorities given in  `Priorities' 
 %%  to the  `N'  textures named in  `Textures' . 
 %%
-%%  The GL establishes a ``working set'' of textures that are resident in texture memory.
-%% These textures may be bound to a texture target much more efficiently than textures that
-%% are not resident. By specifying a priority for each texture, ``gl:prioritizeTextures''
-%% allows applications to guide the GL implementation in determining which textures should
-%% be resident. 
-%%
-%%  The priorities given in  `Priorities'  are clamped to the range  [0 1] before they are
-%% assigned. 0 indicates the lowest priority; textures with priority 0 are least likely to
-%% be resident. 1 indicates the highest priority; textures with priority 1 are most likely
-%% to be resident. However, textures are not guaranteed to be resident until they are used. 
-%%
-%% ``gl:prioritizeTextures'' silently ignores attempts to prioritize texture 0 or any texture
-%% name that does not correspond to an existing texture. 
-%%
-%% ``gl:prioritizeTextures'' does not require that any of the textures named by  `Textures' 
-%%  be bound to a texture target.  {@link gl:texParameterf/3}  may also be used to set a texture's
-%% priority, but only if the texture is currently bound. This is the only way to set the
-%% priority of a default texture. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPrioritizeTextures.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPrioritizeTextures.xml">external</a> documentation.
 -spec prioritizeTextures(Textures, Priorities) -> 'ok' when Textures :: [integer()],Priorities :: [clamp()].
 prioritizeTextures(Textures,Priorities) ->
   TexturesLen = length(Textures),
@@ -7044,20 +2747,7 @@ prioritizeTextures(Textures,Priorities) ->
 %% textures can be bound to a texture target much more efficiently than textures that are
 %% not resident. 
 %%
-%% ``gl:areTexturesResident'' queries the texture residence status of the  `N'  textures
-%% named by the elements of  `Textures' . If all the named textures are resident, ``gl:areTexturesResident''
-%%  returns `?GL_TRUE', and the contents of  `Residences'  are undisturbed. If not
-%% all the named textures are resident, ``gl:areTexturesResident'' returns `?GL_FALSE',
-%% and detailed status is returned in the  `N'  elements of  `Residences' . If an element
-%% of  `Residences'  is `?GL_TRUE', then the texture named by the corresponding element
-%% of  `Textures'  is resident. 
-%%
-%%  The residence status of a single bound texture may also be queried by calling  {@link gl:getTexParameterfv/2} 
-%%  with the `target' argument set to the target to which the texture is bound, and
-%% the `pname' argument set to `?GL_TEXTURE_RESIDENT'. This is the only way that
-%% the residence status of a default texture can be queried. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glAreTexturesResident.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glAreTexturesResident.xml">external</a> documentation.
 -spec areTexturesResident(Textures) -> {0|1,Residences :: [0|1]} when Textures :: [integer()].
 areTexturesResident(Textures) ->
   TexturesLen = length(Textures),
@@ -7070,17 +2760,14 @@ areTexturesResident(Textures) ->
 %% a texture. If  `Texture'  is zero, or is a non-zero value that is not currently the
 %% name of a texture, or if an error occurs, ``gl:isTexture'' returns `?GL_FALSE'. 
 %%
-%%  A name returned by  {@link gl:genTextures/1} , but not yet associated with a texture by
-%% calling  {@link gl:bindTexture/2} , is not the name of a texture. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsTexture.xhtml">external</a> documentation.
 -spec isTexture(Texture) -> 0|1 when Texture :: integer().
 isTexture(Texture) ->
   call(5276, <<Texture:?GLuint>>).
 
 %% @doc glTexSubImage
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexSubImage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec texSubImage1D(Target, Level, Xoffset, Width, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Width :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 texSubImage1D(Target,Level,Xoffset,Width,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5277, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Width:?GLsizei,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -7090,7 +2777,7 @@ texSubImage1D(Target,Level,Xoffset,Width,Format,Type,Pixels) ->
 
 %% @doc glTexSubImage
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexSubImage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec texSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Yoffset :: integer(),Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 texSubImage2D(Target,Level,Xoffset,Yoffset,Width,Height,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5279, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Yoffset:?GLint,Width:?GLsizei,Height:?GLsizei,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -7103,30 +2790,7 @@ texSubImage2D(Target,Level,Xoffset,Yoffset,Width,Height,Format,Type,Pixels) ->
 %% ``gl:copyTexImage1D'' defines a one-dimensional texture image with pixels from the current
 %% `?GL_READ_BUFFER'. 
 %%
-%%  The screen-aligned pixel row with left corner at  (x y) and with a length of   width+2(border) defines
-%% the texture array at the mipmap level specified by  `Level' .  `Internalformat' 
-%% specifies the internal format of the texture array. 
-%%
-%%  The pixels in the row are processed exactly as if  {@link gl:readPixels/7}  had been called,
-%% but the process stops just before final conversion. At this point all pixel component
-%% values are clamped to the range  [0 1] and then converted to the texture's internal format
-%% for storage in the texel array. 
-%%
-%%  Pixel ordering is such that lower   x screen coordinates correspond to lower texture
-%% coordinates. 
-%%
-%%  If any of the pixels within the specified row of the current `?GL_READ_BUFFER' are
-%% outside the window associated with the current rendering context, then the values obtained
-%% for those pixels are undefined. 
-%%
-%% ``gl:copyTexImage1D'' defines a one-dimensional texture image with pixels from the current
-%% `?GL_READ_BUFFER'. 
-%%
-%%  When  `Internalformat'  is one of the sRGB types, the GL does not automatically convert
-%% the source pixels to the sRGB color space. In this case, the ``gl:pixelMap'' function
-%% can be used to accomplish the conversion. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyTexImage1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCopyTexImage1D.xhtml">external</a> documentation.
 -spec copyTexImage1D(Target, Level, Internalformat, X, Y, Width, Border) -> 'ok' when Target :: enum(),Level :: integer(),Internalformat :: enum(),X :: integer(),Y :: integer(),Width :: integer(),Border :: integer().
 copyTexImage1D(Target,Level,Internalformat,X,Y,Width,Border) ->
   cast(5281, <<Target:?GLenum,Level:?GLint,Internalformat:?GLenum,X:?GLint,Y:?GLint,Width:?GLsizei,Border:?GLint>>).
@@ -7136,28 +2800,7 @@ copyTexImage1D(Target,Level,Internalformat,X,Y,Width,Border) ->
 %% ``gl:copyTexImage2D'' defines a two-dimensional texture image, or cube-map texture image
 %% with pixels from the current `?GL_READ_BUFFER'. 
 %%
-%%  The screen-aligned pixel rectangle with lower left corner at ( `X' ,  `Y' ) and
-%% with a width of   width+2(border) and a height of  height+2(border) defines the texture array at the mipmap
-%% level specified by  `Level' .  `Internalformat'  specifies the internal format of
-%% the texture array. 
-%%
-%%  The pixels in the rectangle are processed exactly as if  {@link gl:readPixels/7}  had been
-%% called, but the process stops just before final conversion. At this point all pixel component
-%% values are clamped to the range  [0 1] and then converted to the texture's internal format
-%% for storage in the texel array. 
-%%
-%%  Pixel ordering is such that lower   x and   y screen coordinates correspond to lower   s
-%% and   t texture coordinates. 
-%%
-%%  If any of the pixels within the specified rectangle of the current `?GL_READ_BUFFER'
-%% are outside the window associated with the current rendering context, then the values
-%% obtained for those pixels are undefined. 
-%%
-%%  When  `Internalformat'  is one of the sRGB types, the GL does not automatically convert
-%% the source pixels to the sRGB color space. In this case, the ``gl:pixelMap'' function
-%% can be used to accomplish the conversion. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyTexImage2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCopyTexImage2D.xhtml">external</a> documentation.
 -spec copyTexImage2D(Target, Level, Internalformat, X, Y, Width, Height, Border) -> 'ok' when Target :: enum(),Level :: integer(),Internalformat :: enum(),X :: integer(),Y :: integer(),Width :: integer(),Height :: integer(),Border :: integer().
 copyTexImage2D(Target,Level,Internalformat,X,Y,Width,Height,Border) ->
   cast(5282, <<Target:?GLenum,Level:?GLint,Internalformat:?GLenum,X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei,Border:?GLint>>).
@@ -7168,25 +2811,7 @@ copyTexImage2D(Target,Level,Internalformat,X,Y,Width,Height,Border) ->
 %% pixels from the current `?GL_READ_BUFFER' (rather than from main memory, as is the
 %% case for  {@link gl:texSubImage1D/7} ). 
 %%
-%%  The screen-aligned pixel row with left corner at ( `X' ,  `Y' ), and with length  `Width' 
-%%  replaces the portion of the texture array with x indices  `Xoffset'  through   xoffset
-%% +width-1, inclusive. The destination in the texture array may not include any texels outside
-%% the texture array as it was originally specified. 
-%%
-%%  The pixels in the row are processed exactly as if  {@link gl:readPixels/7}  had been called,
-%% but the process stops just before final conversion. At this point, all pixel component
-%% values are clamped to the range  [0 1] and then converted to the texture's internal format
-%% for storage in the texel array. 
-%%
-%%  It is not an error to specify a subtexture with zero width, but such a specification
-%% has no effect. If any of the pixels within the specified row of the current `?GL_READ_BUFFER'
-%%  are outside the read window associated with the current rendering context, then the values
-%% obtained for those pixels are undefined. 
-%%
-%%  No change is made to the `internalformat', `width', or `border' parameters
-%% of the specified texture array or to texel values outside the specified subregion. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyTexSubImage1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCopyTexSubImage1D.xhtml">external</a> documentation.
 -spec copyTexSubImage1D(Target, Level, Xoffset, X, Y, Width) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),X :: integer(),Y :: integer(),Width :: integer().
 copyTexSubImage1D(Target,Level,Xoffset,X,Y,Width) ->
   cast(5283, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,X:?GLint,Y:?GLint,Width:?GLsizei>>).
@@ -7197,36 +2822,14 @@ copyTexSubImage1D(Target,Level,Xoffset,X,Y,Width) ->
 %% image or cube-map texture image with pixels from the current `?GL_READ_BUFFER' (rather
 %% than from main memory, as is the case for  {@link gl:texSubImage1D/7} ). 
 %%
-%%  The screen-aligned pixel rectangle with lower left corner at (x y) and with width  `Width' 
-%% and height  `Height'  replaces the portion of the texture array with x indices  `Xoffset' 
-%%  through   xoffset+width-1, inclusive, and y indices  `Yoffset'  through   yoffset+height
-%% -1, inclusive, at the mipmap level specified by  `Level' . 
-%%
-%%  The pixels in the rectangle are processed exactly as if  {@link gl:readPixels/7}  had been
-%% called, but the process stops just before final conversion. At this point, all pixel component
-%% values are clamped to the range  [0 1] and then converted to the texture's internal format
-%% for storage in the texel array. 
-%%
-%%  The destination rectangle in the texture array may not include any texels outside the
-%% texture array as it was originally specified. It is not an error to specify a subtexture
-%% with zero width or height, but such a specification has no effect. 
-%%
-%%  If any of the pixels within the specified rectangle of the current `?GL_READ_BUFFER'
-%% are outside the read window associated with the current rendering context, then the values
-%% obtained for those pixels are undefined. 
-%%
-%%  No change is made to the `internalformat', `width', `height', or `border'
-%%  parameters of the specified texture array or to texel values outside the specified subregion.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyTexSubImage2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCopyTexSubImage2D.xhtml">external</a> documentation.
 -spec copyTexSubImage2D(Target, Level, Xoffset, Yoffset, X, Y, Width, Height) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Yoffset :: integer(),X :: integer(),Y :: integer(),Width :: integer(),Height :: integer().
 copyTexSubImage2D(Target,Level,Xoffset,Yoffset,X,Y,Width,Height) ->
   cast(5284, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Yoffset:?GLint,X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei>>).
 
 %% @doc glMap
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec map1d(Target, U1, U2, Stride, Order, Points) -> 'ok' when Target :: enum(),U1 :: float(),U2 :: float(),Stride :: integer(),Order :: integer(),Points :: binary().
 map1d(Target,U1,U2,Stride,Order,Points) ->
   send_bin(Points),
@@ -7234,7 +2837,7 @@ map1d(Target,U1,U2,Stride,Order,Points) ->
 
 %% @doc glMap
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec map1f(Target, U1, U2, Stride, Order, Points) -> 'ok' when Target :: enum(),U1 :: float(),U2 :: float(),Stride :: integer(),Order :: integer(),Points :: binary().
 map1f(Target,U1,U2,Stride,Order,Points) ->
   send_bin(Points),
@@ -7242,7 +2845,7 @@ map1f(Target,U1,U2,Stride,Order,Points) ->
 
 %% @doc glMap
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec map2d(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points) -> 'ok' when Target :: enum(),U1 :: float(),U2 :: float(),Ustride :: integer(),Uorder :: integer(),V1 :: float(),V2 :: float(),Vstride :: integer(),Vorder :: integer(),Points :: binary().
 map2d(Target,U1,U2,Ustride,Uorder,V1,V2,Vstride,Vorder,Points) ->
   send_bin(Points),
@@ -7250,7 +2853,7 @@ map2d(Target,U1,U2,Ustride,Uorder,V1,V2,Vstride,Vorder,Points) ->
 
 %% @doc glMap
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec map2f(Target, U1, U2, Ustride, Uorder, V1, V2, Vstride, Vorder, Points) -> 'ok' when Target :: enum(),U1 :: float(),U2 :: float(),Ustride :: integer(),Uorder :: integer(),V1 :: float(),V2 :: float(),Vstride :: integer(),Vorder :: integer(),Points :: binary().
 map2f(Target,U1,U2,Ustride,Uorder,V1,V2,Vstride,Vorder,Points) ->
   send_bin(Points),
@@ -7262,31 +2865,7 @@ map2f(Target,U1,U2,Ustride,Uorder,V1,V2,Vstride,Vorder,Points) ->
 %% parameters.  `Target'  chooses a map,  `Query'  selects a specific parameter, and  `V' 
 %%  points to storage where the values will be returned. 
 %%
-%%  The acceptable values for the  `Target'  parameter are described in the  {@link gl:map1d/6} 
-%%  and  {@link gl:map1d/6}  reference pages. 
-%%
-%%  `Query'  can assume the following values: 
-%%
-%% `?GL_COEFF':  `V'  returns the control points for the evaluator function. One-dimensional
-%% evaluators return   order control points, and two-dimensional evaluators return   uorder×vorder
-%%  control points. Each control point consists of one, two, three, or four integer, single-precision
-%% floating-point, or double-precision floating-point values, depending on the type of the
-%% evaluator. The GL returns two-dimensional control points in row-major order, incrementing
-%% the   uorder index quickly and the   vorder index after each row. Integer values, when
-%% requested, are computed by rounding the internal floating-point values to the nearest
-%% integer values. 
-%%
-%% `?GL_ORDER':  `V'  returns the order of the evaluator function. One-dimensional
-%% evaluators return a single value,  order. The initial value is 1. Two-dimensional evaluators
-%% return two values,  uorder and   vorder. The initial value is 1,1. 
-%%
-%% `?GL_DOMAIN':  `V'  returns the linear   u and   v mapping parameters. One-dimensional
-%% evaluators return two values,  u1 and   u2, as specified by  {@link gl:map1d/6} . Two-dimensional
-%% evaluators return four values ( u1,   u2,   v1, and   v2) as specified by  {@link gl:map1d/6} .
-%% Integer values, when requested, are computed by rounding the internal floating-point values
-%% to the nearest integer values. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetMap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetMap.xml">external</a> documentation.
 -spec getMapdv(Target, Query, V) -> 'ok' when Target :: enum(),Query :: enum(),V :: mem().
 getMapdv(Target,Query,V) ->
   send_bin(V),
@@ -7313,45 +2892,7 @@ getMapiv(Target,Query,V) ->
 %% To define a map, call  {@link gl:map1d/6}  and  {@link gl:map1d/6} ; to enable and disable it,
 %% call  {@link gl:enable/1}  and  {@link gl:enable/1} . 
 %%
-%%  When one of the ``gl:evalCoord'' commands is issued, all currently enabled maps of
-%% the indicated dimension are evaluated. Then, for each enabled map, it is as if the corresponding
-%% GL command had been issued with the computed value. That is, if `?GL_MAP1_INDEX' or `?GL_MAP2_INDEX'
-%%  is enabled, a  {@link gl:indexd/1}  command is simulated. If `?GL_MAP1_COLOR_4' or `?GL_MAP2_COLOR_4'
-%%  is enabled, a  {@link gl:color3b/3}  command is simulated. If `?GL_MAP1_NORMAL' or `?GL_MAP2_NORMAL'
-%%  is enabled, a normal vector is produced, and if any of `?GL_MAP1_TEXTURE_COORD_1', `?GL_MAP1_TEXTURE_COORD_2'
-%% , `?GL_MAP1_TEXTURE_COORD_3', `?GL_MAP1_TEXTURE_COORD_4', `?GL_MAP2_TEXTURE_COORD_1'
-%% , `?GL_MAP2_TEXTURE_COORD_2', `?GL_MAP2_TEXTURE_COORD_3', or `?GL_MAP2_TEXTURE_COORD_4'
-%%  is enabled, then an appropriate  {@link gl:texCoord1d/1}  command is simulated. 
-%%
-%%  For color, color index, normal, and texture coordinates the GL uses evaluated values
-%% instead of current values for those evaluations that are enabled, and current values otherwise,
-%% However, the evaluated values do not update the current values. Thus, if  {@link gl:vertex2d/2} 
-%%  commands are interspersed with ``gl:evalCoord'' commands, the color, normal, and texture
-%% coordinates associated with the  {@link gl:vertex2d/2}  commands are not affected by the values
-%% generated by the ``gl:evalCoord'' commands, but only by the most recent  {@link gl:color3b/3} 
-%% ,  {@link gl:indexd/1} ,  {@link gl:normal3b/3} , and  {@link gl:texCoord1d/1}  commands. 
-%%
-%%  No commands are issued for maps that are not enabled. If more than one texture evaluation
-%% is enabled for a particular dimension (for example, `?GL_MAP2_TEXTURE_COORD_1' and `?GL_MAP2_TEXTURE_COORD_2'
-%% ), then only the evaluation of the map that produces the larger number of coordinates
-%% (in this case, `?GL_MAP2_TEXTURE_COORD_2') is carried out. `?GL_MAP1_VERTEX_4'
-%% overrides `?GL_MAP1_VERTEX_3', and `?GL_MAP2_VERTEX_4' overrides `?GL_MAP2_VERTEX_3'
-%% , in the same manner. If neither a three- nor a four-component vertex map is enabled for
-%% the specified dimension, the ``gl:evalCoord'' command is ignored. 
-%%
-%%  If you have enabled automatic normal generation, by calling  {@link gl:enable/1}  with argument
-%% `?GL_AUTO_NORMAL', ``gl:evalCoord2'' generates surface normals analytically, regardless
-%% of the contents or enabling of the `?GL_MAP2_NORMAL' map. Let 
-%%
-%%  m=((&amp;PartialD; p)/(&amp;PartialD; u))×((&amp;PartialD; p)/(&amp;PartialD; v))
-%%
-%%  Then the generated normal   n is  n=m/(||m||)
-%%
-%%  If automatic normal generation is disabled, the corresponding normal map `?GL_MAP2_NORMAL'
-%% , if enabled, is used to produce a normal. If neither automatic normal generation nor
-%% a normal map is enabled, no normal is generated for ``gl:evalCoord2'' commands. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEvalCoord.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glEvalCoord.xml">external</a> documentation.
 -spec evalCoord1d(U) -> 'ok' when U :: float().
 evalCoord1d(U) ->
   cast(5292, <<U:?GLdouble>>).
@@ -7397,31 +2938,7 @@ evalCoord2fv({U,V}) ->  evalCoord2f(U,V).
 %% the integer domain of a one- or two-dimensional grid, whose range is the domain of the
 %% evaluation maps specified by  {@link gl:map1d/6}  and  {@link gl:map1d/6} . 
 %%
-%% ``gl:mapGrid1'' and ``gl:mapGrid2'' specify the linear grid mappings between the   i
-%% (or   i and   j) integer grid coordinates, to the   u (or   u and   v) floating-point
-%% evaluation map coordinates. See  {@link gl:map1d/6}  and  {@link gl:map1d/6}  for details of how
-%%   u and   v coordinates are evaluated. 
-%%
-%% ``gl:mapGrid1'' specifies a single linear mapping such that integer grid coordinate
-%% 0 maps exactly to  `U1' , and integer grid coordinate  `Un'  maps exactly to  `U2' 
-%% . All other integer grid coordinates   i are mapped so that 
-%%
-%%  u=i(u2-u1)/un+u1
-%%
-%% ``gl:mapGrid2'' specifies two such linear mappings. One maps integer grid coordinate  
-%% i=0 exactly to  `U1' , and integer grid coordinate   i=un exactly to  `U2' . The
-%% other maps integer grid coordinate   j=0 exactly to  `V1' , and integer grid coordinate
-%%   j=vn exactly to  `V2' . Other integer grid coordinates   i and   j are mapped such
-%% that 
-%%
-%%  u=i(u2-u1)/un+u1
-%%
-%%  v=j(v2-v1)/vn+v1
-%%
-%%  The mappings specified by ``gl:mapGrid'' are used identically by  {@link gl:evalMesh1/3} 
-%% and  {@link gl:evalPoint1/1} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMapGrid.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMapGrid.xml">external</a> documentation.
 -spec mapGrid1d(Un, U1, U2) -> 'ok' when Un :: integer(),U1 :: float(),U2 :: float().
 mapGrid1d(Un,U1,U2) ->
   cast(5296, <<Un:?GLint,0:32,U1:?GLdouble,U2:?GLdouble>>).
@@ -7452,23 +2969,7 @@ mapGrid2f(Un,U1,U2,Vn,V1,V2) ->
 %% . Calling ``gl:evalPoint1'' is equivalent to calling  glEvalCoord1(  i.&amp;Delta; u+u
 %% 1 );  where &amp;Delta; u=(u 2-u 1)/n
 %%
-%%  and   n,   u 1, and   u 2 are the arguments to the most recent  {@link gl:mapGrid1d/3}  command.
-%% The one absolute numeric requirement is that if   i=n, then the value computed from  i.&amp;Delta;
-%%  u+u 1 is exactly   u 2. 
-%%
-%%  In the two-dimensional case, ``gl:evalPoint2'', let 
-%%
-%% &amp;Delta; u=(u 2-u 1)/n
-%%
-%% &amp;Delta; v=(v 2-v 1)/m
-%%
-%%  where   n,   u 1,   u 2,   m,   v 1, and   v 2 are the arguments to the most recent  {@link gl:mapGrid1d/3} 
-%%  command. Then the ``gl:evalPoint2'' command is equivalent to calling  glEvalCoord2(  i.
-%% &amp;Delta; u+u 1, j.&amp;Delta; v+v 1 );  The only absolute numeric requirements are
-%% that if   i=n, then the value computed from  i.&amp;Delta; u+u 1 is exactly   u 2, and
-%% if   j=m, then the value computed from  j.&amp;Delta; v+v 1 is exactly   v 2. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEvalPoint.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glEvalPoint.xml">external</a> documentation.
 -spec evalPoint1(I) -> 'ok' when I :: integer().
 evalPoint1(I) ->
   cast(5300, <<I:?GLint>>).
@@ -7487,53 +2988,7 @@ evalPoint2(I,J) ->
 %% evaluation maps specified by  {@link gl:map1d/6}  and  {@link gl:map1d/6} .  `Mode'  determines
 %% whether the resulting vertices are connected as points, lines, or filled polygons. 
 %%
-%%  In the one-dimensional case, ``gl:evalMesh1'', the mesh is generated as if the following
-%% code fragment were executed: 
-%%
-%%  glBegin(  `Type'  ); for ( i =  `I1' ; i &lt;=  `I2' ; i += 1 ) glEvalCoord1( 
-%% i.&amp;Delta; u+u 1 ); glEnd();  where 
-%%
-%% &amp;Delta; u=(u 2-u 1)/n
-%%
-%%  and   n,   u 1, and   u 2 are the arguments to the most recent  {@link gl:mapGrid1d/3}  command.
-%% `type' is `?GL_POINTS' if  `Mode'  is `?GL_POINT', or `?GL_LINES'
-%% if  `Mode'  is `?GL_LINE'. 
-%%
-%%  The one absolute numeric requirement is that if   i=n, then the value computed from   i.&amp;Delta;
-%%  u+u 1 is exactly   u 2. 
-%%
-%%  In the two-dimensional case, ``gl:evalMesh2'', let .cp &amp;Delta; u=(u 2-u 1)/n
-%%
-%% &amp;Delta; v=(v 2-v 1)/m
-%%
-%%  where   n,   u 1,   u 2,   m,   v 1, and   v 2 are the arguments to the most recent  {@link gl:mapGrid1d/3} 
-%%  command. Then, if  `Mode'  is `?GL_FILL', the ``gl:evalMesh2'' command is equivalent
-%% to: 
-%%
-%%  for ( j =  `J1' ; j &lt;  `J2' ; j += 1 ) { glBegin( GL_QUAD_STRIP ); for ( i =  `I1' 
-%% ; i &lt;=  `I2' ; i += 1 ) { glEvalCoord2(  i.&amp;Delta; u+u 1, j.&amp;Delta; v+v 1
-%% ); glEvalCoord2(  i.&amp;Delta; u+u 1,(j+1).&amp;Delta; v+v 1 ); } glEnd(); } 
-%%
-%%  If  `Mode'  is `?GL_LINE', then a call to ``gl:evalMesh2'' is equivalent to: 
-%%
-%%  for ( j =  `J1' ; j &lt;=  `J2' ; j += 1 ) { glBegin( GL_LINE_STRIP ); for ( i =  `I1' 
-%% ; i &lt;=  `I2' ; i += 1 ) glEvalCoord2(  i.&amp;Delta; u+u 1, j.&amp;Delta; v+v 1
-%% ); glEnd(); }  for ( i =  `I1' ; i &lt;=  `I2' ; i += 1 ) { glBegin( GL_LINE_STRIP
-%% ); for ( j =  `J1' ; j &lt;=  `J1' ; j += 1 ) glEvalCoord2(  i.&amp;Delta; u+u 1, j.
-%% &amp;Delta; v+v 1 ); glEnd(); } 
-%%
-%%  And finally, if  `Mode'  is `?GL_POINT', then a call to ``gl:evalMesh2'' is
-%% equivalent to: 
-%%
-%%  glBegin( GL_POINTS ); for ( j =  `J1' ; j &lt;=  `J2' ; j += 1 ) for ( i =  `I1' 
-%% ; i &lt;=  `I2' ; i += 1 ) glEvalCoord2(  i.&amp;Delta; u+u 1, j.&amp;Delta; v+v 1
-%% ); glEnd(); 
-%%
-%%  In all three cases, the only absolute numeric requirements are that if   i=n, then the
-%% value computed from   i.&amp;Delta; u+u 1 is exactly  u 2, and if   j=m, then the value
-%% computed from  j.&amp;Delta; v+v 1 is exactly   v 2. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEvalMesh.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glEvalMesh.xml">external</a> documentation.
 -spec evalMesh1(Mode, I1, I2) -> 'ok' when Mode :: enum(),I1 :: integer(),I2 :: integer().
 evalMesh1(Mode,I1,I2) ->
   cast(5302, <<Mode:?GLenum,I1:?GLint,I2:?GLint>>).
@@ -7550,66 +3005,7 @@ evalMesh2(Mode,I1,I2,J1,J2) ->
 %% pixel blocks, but not buffer clear operations. To enable and disable fog, call  {@link gl:enable/1} 
 %%  and  {@link gl:enable/1}  with argument `?GL_FOG'. 
 %%
-%% ``gl:fog'' assigns the value or values in  `Params'  to the fog parameter specified
-%% by  `Pname' . The following values are accepted for  `Pname' : 
-%%
-%% `?GL_FOG_MODE':  `Params'  is a single integer or floating-point value that specifies
-%% the equation to be used to compute the fog blend factor,   f. Three symbolic constants
-%% are accepted: `?GL_LINEAR', `?GL_EXP', and `?GL_EXP2'. The equations corresponding
-%% to these symbolic constants are defined below. The initial fog mode is `?GL_EXP'. 
-%%
-%% `?GL_FOG_DENSITY':  `Params'  is a single integer or floating-point value that
-%% specifies   density, the fog density used in both exponential fog equations. Only nonnegative
-%% densities are accepted. The initial fog density is 1. 
-%%
-%% `?GL_FOG_START':  `Params'  is a single integer or floating-point value that specifies
-%%   start, the near distance used in the linear fog equation. The initial near distance
-%% is 0. 
-%%
-%% `?GL_FOG_END':  `Params'  is a single integer or floating-point value that specifies
-%%   end, the far distance used in the linear fog equation. The initial far distance is 1. 
-%%
-%% `?GL_FOG_INDEX':  `Params'  is a single integer or floating-point value that specifies
-%%  i f, the fog color index. The initial fog index is 0. 
-%%
-%% `?GL_FOG_COLOR':  `Params'  contains four integer or floating-point values that
-%% specify  C f, the fog color. Integer values are mapped linearly such that the most positive
-%% representable value maps to 1.0, and the most negative representable value maps to   -1.0.
-%% Floating-point values are mapped directly. After conversion, all color components are
-%% clamped to the range  [0 1]. The initial fog color is (0, 0, 0, 0). 
-%%
-%% `?GL_FOG_COORD_SRC':  `Params'  contains either of the following symbolic constants:
-%% `?GL_FOG_COORD' or `?GL_FRAGMENT_DEPTH'. `?GL_FOG_COORD' specifies that
-%% the current fog coordinate should be used as distance value in the fog color computation.
-%% `?GL_FRAGMENT_DEPTH' specifies that the current fragment depth should be used as
-%% distance value in the fog computation. 
-%%
-%%  Fog blends a fog color with each rasterized pixel fragment's post-texturing color using
-%% a blending factor   f. Factor   f is computed in one of three ways, depending on the fog
-%% mode. Let   c be either the distance in eye coordinate from the origin (in the case that
-%% the `?GL_FOG_COORD_SRC' is `?GL_FRAGMENT_DEPTH') or the current fog coordinate
-%% (in the case that `?GL_FOG_COORD_SRC' is `?GL_FOG_COORD'). The equation for `?GL_LINEAR'
-%%  fog is  f=(end-c)/(end-start)
-%%
-%%  The equation for `?GL_EXP' fog is  f=e(-(density. c))
-%%
-%%  The equation for `?GL_EXP2' fog is  f=e(-(density. c)) 2
-%%
-%%  Regardless of the fog mode,  f is clamped to the range  [0 1] after it is computed. Then,
-%% if the GL is in RGBA color mode, the fragment's red, green, and blue colors, represented
-%% by   C r, are replaced by 
-%%
-%% (C r)"=f×C r+(1-f)×C f
-%%
-%%  Fog does not affect a fragment's alpha component. 
-%%
-%%  In color index mode, the fragment's color index   i r is replaced by 
-%%
-%% (i r)"=i r+(1-f)×i f
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFog.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFog.xml">external</a> documentation.
 -spec fogf(Pname, Param) -> 'ok' when Pname :: enum(),Param :: float().
 fogf(Pname,Param) ->
   cast(5304, <<Pname:?GLenum,Param:?GLfloat>>).
@@ -7642,106 +3038,7 @@ fogiv(Pname,Params) ->
 %% about primitives that would have been rasterized is fed back to the application using
 %% the GL. 
 %%
-%% ``gl:feedbackBuffer'' has three arguments:  `Buffer'  is a pointer to an array of
-%% floating-point values into which feedback information is placed.  `Size'  indicates
-%% the size of the array.  `Type'  is a symbolic constant describing the information that
-%% is fed back for each vertex. ``gl:feedbackBuffer'' must be issued before feedback mode
-%% is enabled (by calling  {@link gl:renderMode/1}  with argument `?GL_FEEDBACK'). Setting
-%% `?GL_FEEDBACK' without establishing the feedback buffer, or calling ``gl:feedbackBuffer''
-%%  while the GL is in feedback mode, is an error. 
-%%
-%%  When  {@link gl:renderMode/1}  is called while in feedback mode, it returns the number of
-%% entries placed in the feedback array and resets the feedback array pointer to the base
-%% of the feedback buffer. The returned value never exceeds  `Size' . If the feedback
-%% data required more room than was available in  `Buffer' ,  {@link gl:renderMode/1}  returns
-%% a negative value. To take the GL out of feedback mode, call  {@link gl:renderMode/1}  with
-%% a parameter value other than `?GL_FEEDBACK'. 
-%%
-%%  While in feedback mode, each primitive, bitmap, or pixel rectangle that would be rasterized
-%% generates a block of values that are copied into the feedback array. If doing so would
-%% cause the number of entries to exceed the maximum, the block is partially written so as
-%% to fill the array (if there is any room left at all), and an overflow flag is set. Each
-%% block begins with a code indicating the primitive type, followed by values that describe
-%% the primitive's vertices and associated data. Entries are also written for bitmaps and
-%% pixel rectangles. Feedback occurs after polygon culling and  {@link gl:polygonMode/2}  interpretation
-%% of polygons has taken place, so polygons that are culled are not returned in the feedback
-%% buffer. It can also occur after polygons with more than three edges are broken up into
-%% triangles, if the GL implementation renders polygons by performing this decomposition. 
-%%
-%%  The  {@link gl:passThrough/1}  command can be used to insert a marker into the feedback
-%% buffer. See  {@link gl:passThrough/1} . 
-%%
-%%  Following is the grammar for the blocks of values written into the feedback buffer. Each
-%% primitive is indicated with a unique identifying value followed by some number of vertices.
-%% Polygon entries include an integer value indicating how many vertices follow. A vertex
-%% is fed back as some number of floating-point values, as determined by  `Type' . Colors
-%% are fed back as four values in RGBA mode and one value in color index mode. 
-%%
-%%  feedbackList  ← feedbackItem feedbackList | feedbackItem 
-%%
-%%  feedbackItem  ← point | lineSegment | polygon | bitmap | pixelRectangle | passThru 
-%%
-%%  point  ←`?GL_POINT_TOKEN' vertex 
-%%
-%%  lineSegment  ←`?GL_LINE_TOKEN' vertex vertex | `?GL_LINE_RESET_TOKEN' vertex
-%% vertex 
-%%
-%%  polygon  ←`?GL_POLYGON_TOKEN' n polySpec 
-%%
-%%  polySpec  ← polySpec vertex | vertex vertex vertex 
-%%
-%%  bitmap  ←`?GL_BITMAP_TOKEN' vertex 
-%%
-%%  pixelRectangle  ←`?GL_DRAW_PIXEL_TOKEN' vertex | `?GL_COPY_PIXEL_TOKEN' vertex
-%% 
-%%
-%%  passThru  ←`?GL_PASS_THROUGH_TOKEN' value 
-%%
-%%  vertex  ← 2d | 3d | 3dColor | 3dColorTexture | 4dColorTexture 
-%%
-%%  2d  ← value value 
-%%
-%%  3d  ← value value value 
-%%
-%%  3dColor  ← value value value color 
-%%
-%%  3dColorTexture  ← value value value color tex 
-%%
-%%  4dColorTexture  ← value value value value color tex 
-%%
-%%  color  ← rgba | index 
-%%
-%%  rgba  ← value value value value 
-%%
-%%  index  ← value 
-%%
-%%  tex  ← value value value value 
-%%
-%% `value' is a floating-point number, and `n' is a floating-point integer giving
-%% the number of vertices in the polygon. `?GL_POINT_TOKEN', `?GL_LINE_TOKEN', `?GL_LINE_RESET_TOKEN'
-%% , `?GL_POLYGON_TOKEN', `?GL_BITMAP_TOKEN', `?GL_DRAW_PIXEL_TOKEN', `?GL_COPY_PIXEL_TOKEN'
-%%  and `?GL_PASS_THROUGH_TOKEN' are symbolic floating-point constants. `?GL_LINE_RESET_TOKEN'
-%%  is returned whenever the line stipple pattern is reset. The data returned as a vertex
-%% depends on the feedback  `Type' . 
-%%
-%%  The following table gives the correspondence between  `Type'  and the number of values
-%% per vertex. `k' is 1 in color index mode and 4 in RGBA mode. 
-%%
-%% <table><tbody><tr><td>` Type '</td><td>` Coordinates '</td><td>` Color '</td>
-%% <td>` Texture '</td><td>` Total Number of Values '</td></tr></tbody><tbody><tr><td>
-%% `?GL_2D'</td><td>`x', `y'</td><td></td><td></td><td> 2 </td></tr><tr><td>`?GL_3D'
-%% </td><td>`x', `y', `z'</td><td></td><td></td><td> 3 </td></tr><tr><td>`?GL_3D_COLOR'
-%% </td><td>`x', `y', `z'</td><td> k</td><td></td><td> 3+k</td></tr><tr><td>`?GL_3D_COLOR_TEXTURE'
-%% </td><td>`x', `y', `z'</td><td> k</td><td> 4 </td><td> 7+k</td></tr><tr><td>
-%% `?GL_4D_COLOR_TEXTURE'</td><td>`x', `y', `z', `w'</td><td> k</td>
-%% <td> 4 </td><td> 8+k</td></tr></tbody></table>
-%%
-%%  Feedback vertex coordinates are in window coordinates, except `w', which is in clip
-%% coordinates. Feedback colors are lighted, if lighting is enabled. Feedback texture coordinates
-%% are generated, if texture coordinate generation is enabled. They are always transformed
-%% by the texture matrix. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFeedbackBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFeedbackBuffer.xml">external</a> documentation.
 -spec feedbackBuffer(Size, Type, Buffer) -> 'ok' when Size :: integer(),Type :: enum(),Buffer :: mem().
 feedbackBuffer(Size,Type,Buffer) ->
   send_bin(Buffer),
@@ -7749,18 +3046,9 @@ feedbackBuffer(Size,Type,Buffer) ->
 
 %% @doc Place a marker in the feedback buffer
 %%
-%%  Feedback is a GL render mode. The mode is selected by calling  {@link gl:renderMode/1} 
-%% with `?GL_FEEDBACK'. When the GL is in feedback mode, no pixels are produced by rasterization.
-%% Instead, information about primitives that would have been rasterized is fed back to the
-%% application using the GL. See the  {@link gl:feedbackBuffer/3}  reference page for a description
-%% of the feedback buffer and the values in it. 
-%%
-%% ``gl:passThrough'' inserts a user-defined marker in the feedback buffer when it is executed
-%% in feedback mode.  `Token'  is returned as if it were a primitive; it is indicated
-%% with its own unique identifying value: `?GL_PASS_THROUGH_TOKEN'. The order of ``gl:passThrough''
-%%  commands with respect to the specification of graphics primitives is maintained. 
+%% 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPassThrough.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPassThrough.xml">external</a> documentation.
 -spec passThrough(Token) -> 'ok' when Token :: float().
 passThrough(Token) ->
   cast(5309, <<Token:?GLfloat>>).
@@ -7774,38 +3062,7 @@ passThrough(Token) ->
 %%  must be issued before selection mode is enabled, and it must not be issued while the
 %% rendering mode is `?GL_SELECT'. 
 %%
-%%  A programmer can use selection to determine which primitives are drawn into some region
-%% of a window. The region is defined by the current modelview and perspective matrices. 
-%%
-%%  In selection mode, no pixel fragments are produced from rasterization. Instead, if a
-%% primitive or a raster position intersects the clipping volume defined by the viewing frustum
-%% and the user-defined clipping planes, this primitive causes a selection hit. (With polygons,
-%% no hit occurs if the polygon is culled.) When a change is made to the name stack, or when
-%%  {@link gl:renderMode/1}  is called, a hit record is copied to  `Buffer'  if any hits
-%% have occurred since the last such event (name stack change or  {@link gl:renderMode/1}  call).
-%% The hit record consists of the number of names in the name stack at the time of the event,
-%% followed by the minimum and maximum depth values of all vertices that hit since the previous
-%% event, followed by the name stack contents, bottom name first. 
-%%
-%%  Depth values (which are in the range [0,1]) are multiplied by   2 32-1, before being
-%% placed in the hit record. 
-%%
-%%  An internal index into  `Buffer'  is reset to 0 whenever selection mode is entered.
-%% Each time a hit record is copied into  `Buffer' , the index is incremented to point
-%% to the cell just past the end of the block of names(emthat is, to the next available cell
-%% If the hit record is larger than the number of remaining locations in  `Buffer' , as
-%% much data as can fit is copied, and the overflow flag is set. If the name stack is empty
-%% when a hit record is copied, that record consists of 0 followed by the minimum and maximum
-%% depth values. 
-%%
-%%  To exit selection mode, call  {@link gl:renderMode/1}  with an argument other than `?GL_SELECT'
-%% . Whenever  {@link gl:renderMode/1}  is called while the render mode is `?GL_SELECT',
-%% it returns the number of hit records copied to  `Buffer' , resets the overflow flag
-%% and the selection buffer pointer, and initializes the name stack to be empty. If the overflow
-%% bit was set when  {@link gl:renderMode/1}  was called, a negative hit record count is returned.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSelectBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glSelectBuffer.xml">external</a> documentation.
 -spec selectBuffer(Size, Buffer) -> 'ok' when Size :: integer(),Buffer :: mem().
 selectBuffer(Size,Buffer) ->
   send_bin(Buffer),
@@ -7817,10 +3074,7 @@ selectBuffer(Size,Buffer) ->
 %% uniquely identified. It consists of an ordered set of unsigned integers. ``gl:initNames''
 %%  causes the name stack to be initialized to its default empty state. 
 %%
-%%  The name stack is always empty while the render mode is not `?GL_SELECT'. Calls to ``gl:initNames''
-%%  while the render mode is not `?GL_SELECT' are ignored. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glInitNames.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glInitNames.xml">external</a> documentation.
 -spec initNames() -> 'ok'.
 initNames() ->
   cast(5311, <<>>).
@@ -7831,12 +3085,7 @@ initNames() ->
 %% uniquely identified. It consists of an ordered set of unsigned integers and is initially
 %% empty. 
 %%
-%% ``gl:loadName'' causes  `Name'  to replace the value on the top of the name stack. 
-%%
-%%  The name stack is always empty while the render mode is not `?GL_SELECT'. Calls to ``gl:loadName''
-%%  while the render mode is not `?GL_SELECT' are ignored. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLoadName.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLoadName.xml">external</a> documentation.
 -spec loadName(Name) -> 'ok' when Name :: integer().
 loadName(Name) ->
   cast(5312, <<Name:?GLuint>>).
@@ -7847,20 +3096,7 @@ loadName(Name) ->
 %% uniquely identified. It consists of an ordered set of unsigned integers and is initially
 %% empty. 
 %%
-%% ``gl:pushName'' causes  `Name'  to be pushed onto the name stack.  {@link gl:pushName/1} 
-%% pops one name off the top of the stack. 
-%%
-%%  The maximum name stack depth is implementation-dependent; call `?GL_MAX_NAME_STACK_DEPTH'
-%%  to find out the value for a particular implementation. It is an error to push a name
-%% onto a full stack or to pop a name off an empty stack. It is also an error to manipulate
-%% the name stack between the execution of  {@link gl:'begin'/1}  and the corresponding execution
-%% of  {@link gl:'begin'/1} . In any of these cases, the error flag is set and no other change is
-%% made to GL state. 
-%%
-%%  The name stack is always empty while the render mode is not `?GL_SELECT'. Calls to ``gl:pushName''
-%%  or  {@link gl:pushName/1}  while the render mode is not `?GL_SELECT' are ignored. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPushName.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glPushName.xml">external</a> documentation.
 -spec pushName(Name) -> 'ok' when Name :: integer().
 pushName(Name) ->
   cast(5313, <<Name:?GLuint>>).
@@ -7878,7 +3114,7 @@ popName() ->
 %%  for a complete description of the blending operations. Initially the `?GL_BLEND_COLOR'
 %%  is set to (0, 0, 0, 0). 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlendColor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBlendColor.xhtml">external</a> documentation.
 -spec blendColor(Red, Green, Blue, Alpha) -> 'ok' when Red :: clamp(),Green :: clamp(),Blue :: clamp(),Alpha :: clamp().
 blendColor(Red,Green,Blue,Alpha) ->
   cast(5315, <<Red:?GLclampf,Green:?GLclampf,Blue:?GLclampf,Alpha:?GLclampf>>).
@@ -7891,35 +3127,7 @@ blendColor(Red,Green,Blue,Alpha) ->
 %%  specifies the blend equation for a single draw buffer whereas ``gl:blendEquation''
 %% sets the blend equation for all draw buffers. 
 %%
-%%  These equations use the source and destination blend factors specified by either  {@link gl:blendFunc/2} 
-%%  or  {@link gl:blendFuncSeparate/4} . See  {@link gl:blendFunc/2}  or  {@link gl:blendFuncSeparate/4} 
-%%  for a description of the various blend factors. 
-%%
-%%  In the equations that follow, source and destination color components are referred to
-%% as (R s G s B s A s) and (R d G d B d A d), respectively. The result color is referred to as (R r G r B r A r). The source and destination
-%% blend factors are denoted (s R s G s B s A) and (d R d G d B d A), respectively. For these equations all color components
-%% are understood to have values in the range  [0 1].  <table><tbody><tr><td>` Mode '</td><td>
-%% ` RGB Components '</td><td>` Alpha Component '</td></tr></tbody><tbody><tr><td>`?GL_FUNC_ADD'
-%% </td><td> Rr=R s  s R+R d  d R Gr=G s  s G+G d  d G Br=B s  s B+B d  d B</td><td> Ar=A s 
-%% s A+A d  d A</td></tr><tr><td>`?GL_FUNC_SUBTRACT'</td><td> Rr=R s  s R-R d  d R Gr=G
-%% s  s G-G d  d G Br=B s  s B-B d  d B</td><td> Ar=A s  s A-A d  d A</td></tr><tr><td>`?GL_FUNC_REVERSE_SUBTRACT'
-%% </td><td> Rr=R d  d R-R s  s R Gr=G d  d G-G s  s G Br=B d  d B-B s  s B</td><td> Ar=A d 
-%% d A-A s  s A</td></tr><tr><td>`?GL_MIN'</td><td> Rr=min(R s R d) Gr=min(G s G d) Br=min(B s B d)</td><td> Ar=min
-%% (A s A d)</td></tr><tr><td>`?GL_MAX'</td><td> Rr=max(R s R d) Gr=max(G s G d) Br=max(B s B d)</td><td> Ar=max(A s A d)</td></tr></tbody>
-%% </table>
-%%
-%%  The results of these equations are clamped to the range  [0 1]. 
-%%
-%%  The `?GL_MIN' and `?GL_MAX' equations are useful for applications that analyze
-%% image data (image thresholding against a constant color, for example). The `?GL_FUNC_ADD'
-%%  equation is useful for antialiasing and transparency, among other things. 
-%%
-%%  Initially, both the RGB blend equation and the alpha blend equation are set to `?GL_FUNC_ADD'
-%% . 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlendEquation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBlendEquation.xhtml">external</a> documentation.
 -spec blendEquation(Mode) -> 'ok' when Mode :: enum().
 blendEquation(Mode) ->
   cast(5316, <<Mode:?GLenum>>).
@@ -7931,24 +3139,7 @@ blendEquation(Mode) ->
 %% , with the additional constraint that all values in the arrays  `Count'  must lie between
 %%  `Start'  and  `End' , inclusive. 
 %%
-%%  Implementations denote recommended maximum amounts of vertex and index data, which may
-%% be queried by calling  {@link gl:getBooleanv/1}  with argument `?GL_MAX_ELEMENTS_VERTICES' and `?GL_MAX_ELEMENTS_INDICES'
-%% . If   end-start+1 is greater than the value of `?GL_MAX_ELEMENTS_VERTICES', or if  `Count' 
-%%  is greater than the value of `?GL_MAX_ELEMENTS_INDICES', then the call may operate
-%% at reduced performance. There is no requirement that all vertices in the range [start end] be referenced.
-%% However, the implementation may partially process unused vertices, reducing performance
-%% from what could be achieved with an optimal index set. 
-%%
-%%  When ``gl:drawRangeElements'' is called, it uses  `Count'  sequential elements from
-%% an enabled array, starting at  `Start'  to construct a sequence of geometric primitives.
-%%  `Mode'  specifies what kind of primitives are constructed, and how the array elements
-%% construct these primitives. If more than one array is enabled, each is used.  
-%%
-%%  Vertex attributes that are modified by ``gl:drawRangeElements'' have an unspecified
-%% value after ``gl:drawRangeElements'' returns. Attributes that aren't modified maintain
-%% their previous values. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawRangeElements.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawRangeElements.xhtml">external</a> documentation.
 -spec drawRangeElements(Mode, Start, End, Count, Type, Indices) -> 'ok' when Mode :: enum(),Start :: integer(),End :: integer(),Count :: integer(),Type :: enum(),Indices :: offset()|mem().
 drawRangeElements(Mode,Start,End,Count,Type,Indices) when  is_integer(Indices) ->
   cast(5317, <<Mode:?GLenum,Start:?GLuint,End:?GLuint,Count:?GLsizei,Type:?GLenum,Indices:?GLuint>>);
@@ -7962,101 +3153,7 @@ drawRangeElements(Mode,Start,End,Count,Type,Indices) ->
 %% which texturing is enabled. To enable and disable three-dimensional texturing, call  {@link gl:enable/1} 
 %%  and  {@link gl:enable/1}  with argument `?GL_TEXTURE_3D'. 
 %%
-%%  To define texture images, call ``gl:texImage3D''. The arguments describe the parameters
-%% of the texture image, such as height, width, depth, width of the border, level-of-detail
-%% number (see  {@link gl:texParameterf/3} ), and number of color components provided. The last
-%% three arguments describe how the image is represented in memory. 
-%%
-%%  If  `Target'  is `?GL_PROXY_TEXTURE_3D', no data is read from  `Data' , but
-%% all of the texture image state is recalculated, checked for consistency, and checked against
-%% the implementation's capabilities. If the implementation cannot handle a texture of the
-%% requested texture size, it sets all of the image state to 0, but does not generate an
-%% error (see  {@link gl:getError/0} ). To query for an entire mipmap array, use an image array
-%% level greater than or equal to 1. 
-%%
-%%  If  `Target'  is `?GL_TEXTURE_3D', data is read from  `Data'  as a sequence
-%% of signed or unsigned bytes, shorts, or longs, or single-precision floating-point values,
-%% depending on  `Type' . These values are grouped into sets of one, two, three, or four
-%% values, depending on  `Format' , to form elements. Each data byte is treated as eight
-%% 1-bit elements, with bit ordering determined by `?GL_UNPACK_LSB_FIRST' (see  {@link gl:pixelStoref/2} 
-%% ). 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  The first element corresponds to the lower left corner of the texture image. Subsequent
-%% elements progress left-to-right through the remaining texels in the lowest row of the
-%% texture image, and then in successively higher rows of the texture image. The final element
-%% corresponds to the upper right corner of the texture image. 
-%%
-%%  `Format'  determines the composition of each element in  `Data' . It can assume
-%% one of these symbolic values: 
-%%
-%% `?GL_RED':  Each element is a single red component. The GL converts it to floating
-%% point and assembles it into an RGBA element by attaching 0 for green and blue, and 1 for
-%% alpha. Each component is then multiplied by the signed scale factor `?GL_c_SCALE',
-%% added to the signed bias `?GL_c_BIAS', and clamped to the range [0,1]. 
-%%
-%% `?GL_RG':  Each element is a red and green pair. The GL converts each to floating
-%% point and assembles it into an RGBA element by attaching 0 for blue, and 1 for alpha.
-%% Each component is then multiplied by the signed scale factor `?GL_c_SCALE', added
-%% to the signed bias `?GL_c_BIAS', and clamped to the range [0,1]. 
-%%
-%% `?GL_RGB'
-%%
-%% `?GL_BGR':  Each element is an RGB triple. The GL converts it to floating point and
-%% assembles it into an RGBA element by attaching 1 for alpha. Each component is then multiplied
-%% by the signed scale factor `?GL_c_SCALE', added to the signed bias `?GL_c_BIAS',
-%% and clamped to the range [0,1]. 
-%%
-%% `?GL_RGBA'
-%%
-%% `?GL_BGRA':  Each element contains all four components. Each component is multiplied
-%% by the signed scale factor `?GL_c_SCALE', added to the signed bias `?GL_c_BIAS',
-%% and clamped to the range [0,1]. 
-%%
-%%  If an application wants to store the texture at a certain resolution or in a certain
-%% format, it can request the resolution and format with  `InternalFormat' . The GL will
-%% choose an internal representation that closely approximates that requested by  `InternalFormat' 
-%% , but it may not match exactly. (The representations specified by `?GL_RED', `?GL_RG'
-%% , `?GL_RGB', and `?GL_RGBA' must match exactly.) 
-%%
-%%  `InternalFormat'  may be one of the base internal formats shown in Table 1, below 
-%%
-%%  `InternalFormat'  may also be one of the sized internal formats shown in Table 2,
-%% below 
-%%
-%%  Finally,  `InternalFormat'  may also be one of the generic or compressed compressed
-%% texture formats shown in Table 3 below 
-%%
-%%   If the  `InternalFormat'  parameter is one of the generic compressed formats,  `?GL_COMPRESSED_RED'
-%% , `?GL_COMPRESSED_RG',  `?GL_COMPRESSED_RGB', or  `?GL_COMPRESSED_RGBA',
-%% the GL will replace the internal format with the symbolic constant for a specific internal
-%% format and compress the texture before storage. If no corresponding internal format is
-%% available, or the GL can not compress that image for any reason, the internal format is
-%% instead replaced with a corresponding base internal format. 
-%%
-%%  If the  `InternalFormat'  parameter is     `?GL_SRGB',    `?GL_SRGB8',    `?GL_SRGB_ALPHA'
-%% , or    `?GL_SRGB8_ALPHA8', the texture is treated as if the red, green, blue, or
-%% luminance components are encoded in the sRGB color space. Any alpha component is left
-%% unchanged. The conversion from the sRGB encoded component      c s    to a linear component
-%%      c l is:   
-%%
-%%  c l={ c s/12.92if c s&amp;le; 0.04045( c s+0.055/1.055) 2.4if c s&gt; 0.04045
-%%
-%%     Assume        c s    is the sRGB component in the range [0,1]. 
-%%
-%%  Use the `?GL_PROXY_TEXTURE_3D' target to try out a resolution and format. The implementation
-%% will update and recompute its best match for the requested storage resolution and format.
-%% To then query this state, call  {@link gl:getTexLevelParameterfv/3} . If the texture cannot
-%% be accommodated, texture state is set to 0. 
-%%
-%%  A one-component texture image uses only the red component of the RGBA color extracted
-%% from  `Data' . A two-component image uses the R and A values. A three-component image
-%% uses the R, G, and B values. A four-component image uses all of the RGBA components. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexImage3D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexImage3D.xhtml">external</a> documentation.
 -spec texImage3D(Target, Level, InternalFormat, Width, Height, Depth, Border, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),InternalFormat :: integer(),Width :: integer(),Height :: integer(),Depth :: integer(),Border :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 texImage3D(Target,Level,InternalFormat,Width,Height,Depth,Border,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5319, <<Target:?GLenum,Level:?GLint,InternalFormat:?GLint,Width:?GLsizei,Height:?GLsizei,Depth:?GLsizei,Border:?GLint,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -8066,7 +3163,7 @@ texImage3D(Target,Level,InternalFormat,Width,Height,Depth,Border,Format,Type,Pix
 
 %% @doc glTexSubImage
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexSubImage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec texSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, Type, Pixels) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Yoffset :: integer(),Zoffset :: integer(),Width :: integer(),Height :: integer(),Depth :: integer(),Format :: enum(),Type :: enum(),Pixels :: offset()|mem().
 texSubImage3D(Target,Level,Xoffset,Yoffset,Zoffset,Width,Height,Depth,Format,Type,Pixels) when  is_integer(Pixels) ->
   cast(5321, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Yoffset:?GLint,Zoffset:?GLint,Width:?GLsizei,Height:?GLsizei,Depth:?GLsizei,Format:?GLenum,Type:?GLenum,Pixels:?GLuint>>);
@@ -8080,30 +3177,7 @@ texSubImage3D(Target,Level,Xoffset,Yoffset,Zoffset,Width,Height,Depth,Format,Typ
 %% image with pixels from the current `?GL_READ_BUFFER' (rather than from main memory,
 %% as is the case for  {@link gl:texSubImage1D/7} ). 
 %%
-%%  The screen-aligned pixel rectangle with lower left corner at ( `X' ,  `Y' ) and
-%% with width  `Width'  and height  `Height'  replaces the portion of the texture array
-%% with x indices  `Xoffset'  through   xoffset+width-1, inclusive, and y indices  `Yoffset' 
-%%  through   yoffset+height-1, inclusive, at z index  `Zoffset'  and at the mipmap level
-%% specified by  `Level' . 
-%%
-%%  The pixels in the rectangle are processed exactly as if  {@link gl:readPixels/7}  had been
-%% called, but the process stops just before final conversion. At this point, all pixel component
-%% values are clamped to the range  [0 1] and then converted to the texture's internal format
-%% for storage in the texel array. 
-%%
-%%  The destination rectangle in the texture array may not include any texels outside the
-%% texture array as it was originally specified. It is not an error to specify a subtexture
-%% with zero width or height, but such a specification has no effect. 
-%%
-%%  If any of the pixels within the specified rectangle of the current `?GL_READ_BUFFER'
-%% are outside the read window associated with the current rendering context, then the values
-%% obtained for those pixels are undefined. 
-%%
-%%  No change is made to the `internalformat', `width', `height', `depth',
-%% or `border' parameters of the specified texture array or to texel values outside
-%% the specified subregion. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyTexSubImage3D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCopyTexSubImage3D.xhtml">external</a> documentation.
 -spec copyTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, X, Y, Width, Height) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Yoffset :: integer(),Zoffset :: integer(),X :: integer(),Y :: integer(),Width :: integer(),Height :: integer().
 copyTexSubImage3D(Target,Level,Xoffset,Yoffset,Zoffset,X,Y,Width,Height) ->
   cast(5323, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Yoffset:?GLint,Zoffset:?GLint,X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei>>).
@@ -8115,95 +3189,7 @@ copyTexSubImage3D(Target,Level,Xoffset,Yoffset,Zoffset,X,Y,Width,Height) ->
 %% lookup table. Use the targets `?GL_PROXY_*' for the first case and the other targets
 %% for the second case. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a color table is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  If  `Target'  is `?GL_COLOR_TABLE', `?GL_POST_CONVOLUTION_COLOR_TABLE', or `?GL_POST_COLOR_MATRIX_COLOR_TABLE'
-%% , ``gl:colorTable'' builds a color lookup table from an array of pixels. The pixel array
-%% specified by  `Width' ,  `Format' ,  `Type' , and  `Data'  is extracted from
-%% memory and processed just as if  {@link gl:drawPixels/5}  were called, but processing stops
-%% after the final expansion to RGBA is completed. 
-%%
-%%  The four scale parameters and the four bias parameters that are defined for the table
-%% are then used to scale and bias the R, G, B, and A components of each pixel. (Use ``gl:colorTableParameter''
-%%  to set these scale and bias parameters.) 
-%%
-%%  Next, the R, G, B, and A values are clamped to the range  [0 1]. Each pixel is then converted
-%% to the internal format specified by  `Internalformat' . This conversion simply maps
-%% the component values of the pixel (R, G, B, and A) to the values included in the internal
-%% format (red, green, blue, alpha, luminance, and intensity). The mapping is as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Format '</td><td>` Red '</td><td>` Green '</td>
-%% <td>` Blue '</td><td>` Alpha '</td><td>` Luminance '</td><td>` Intensity '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ALPHA'</td><td></td><td></td><td></td><td> A </td>
-%% <td></td><td></td></tr><tr><td>`?GL_LUMINANCE'</td><td></td><td></td><td></td><td></td>
-%% <td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td></td><td></td><td></td>
-%% <td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'</td><td></td><td></td><td>
-%% </td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td><td> R </td><td> G </td>
-%% <td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'</td><td> R </td><td>
-%% G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%%
-%%  Finally, the red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in the color table. They form a one-dimensional table with indices in
-%% the range [0 width-1]. 
-%%
-%%  If  `Target'  is `?GL_PROXY_*', ``gl:colorTable'' recomputes and stores the
-%% values of the proxy color table's state variables `?GL_COLOR_TABLE_FORMAT', `?GL_COLOR_TABLE_WIDTH'
-%% , `?GL_COLOR_TABLE_RED_SIZE', `?GL_COLOR_TABLE_GREEN_SIZE', `?GL_COLOR_TABLE_BLUE_SIZE'
-%% , `?GL_COLOR_TABLE_ALPHA_SIZE', `?GL_COLOR_TABLE_LUMINANCE_SIZE', and `?GL_COLOR_TABLE_INTENSITY_SIZE'
-%% . There is no effect on the image or state of any actual color table. If the specified
-%% color table is too large to be supported, then all the proxy state variables listed above
-%% are set to zero. Otherwise, the color table could be supported by ``gl:colorTable''
-%% using the corresponding non-proxy target, and the proxy state variables are set as if
-%% that target were being defined. 
-%%
-%%  The proxy state variables can be retrieved by calling  {@link gl:getColorTableParameterfv/2} 
-%% with a target of `?GL_PROXY_*'. This allows the application to decide if a particular
-%% ``gl:colorTable'' command would succeed, and to determine what the resulting color table
-%% attributes would be. 
-%%
-%%  If a color table is enabled, and its width is non-zero, then its contents are used to
-%% replace a subset of the components of each RGBA pixel group, based on the internal format
-%% of the table. 
-%%
-%%  Each pixel group has color components (R, G, B, A) that are in the range  [0.0 1.0]. The color
-%% components are rescaled to the size of the color lookup table to form an index. Then a
-%% subset of the components based on the internal format of the table are replaced by the
-%% table entry selected by that index. If the color components and contents of the table
-%% are represented as follows: 
-%%
-%% <table><tbody><tr><td>` Representation '</td><td>` Meaning '</td></tr></tbody><tbody>
-%% <tr><td>r</td><td> Table index computed from R</td></tr><tr><td>g</td><td> Table index
-%% computed from G</td></tr><tr><td>b</td><td> Table index computed from B</td></tr><tr><td>a
-%% </td><td> Table index computed from A</td></tr><tr><td>L[i]</td><td> Luminance value at
-%% table index i</td></tr><tr><td>I[i]</td><td> Intensity value at table index i</td></tr><tr>
-%% <td>R[i]</td><td> Red value at table index i</td></tr><tr><td>G[i]</td><td> Green value
-%% at table index i</td></tr><tr><td>B[i]</td><td> Blue value at table index i</td></tr><tr><td>
-%% A[i]</td><td> Alpha value at table index i</td></tr></tbody></table>
-%%
-%%  then the result of color table lookup is as follows: 
-%%
-%% <table><tbody><tr><td></td><td>` Resulting Texture Components '</td></tr><tr><td>` Table Internal Format '
-%% </td><td>` R '</td><td>` G '</td><td>` B '</td><td>` A '</td></tr></tbody>
-%% <tbody><tr><td>`?GL_ALPHA'</td><td>R</td><td>G</td><td>B</td><td>A[a]</td></tr><tr><td>
-%% `?GL_LUMINANCE'</td><td>L[r]</td><td>L[g]</td><td>L[b]</td><td>At</td></tr><tr><td>`?GL_LUMINANCE_ALPHA'
-%% </td><td>L[r]</td><td>L[g]</td><td>L[b]</td><td>A[a]</td></tr><tr><td>`?GL_INTENSITY'</td>
-%% <td>I[r]</td><td>I[g]</td><td>I[b]</td><td>I[a]</td></tr><tr><td>`?GL_RGB'</td><td>R[r]
-%% </td><td>G[g]</td><td>B[b]</td><td>A</td></tr><tr><td>`?GL_RGBA'</td><td>R[r]</td><td>
-%% G[g]</td><td>B[b]</td><td>A[a]</td></tr></tbody></table>
-%%
-%%  When `?GL_COLOR_TABLE' is enabled, the colors resulting from the pixel map operation
-%% (if it is enabled) are mapped by the color lookup table before being passed to the convolution
-%% operation. The colors resulting from the convolution operation are modified by the post
-%% convolution color lookup table when `?GL_POST_CONVOLUTION_COLOR_TABLE' is enabled.
-%% These modified colors are then sent to the color matrix operation. Finally, if `?GL_POST_COLOR_MATRIX_COLOR_TABLE'
-%%  is enabled, the colors resulting from the color matrix operation are mapped by the post
-%% color matrix color lookup table before being used by the histogram operation. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorTable.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glColorTable.xml">external</a> documentation.
 -spec colorTable(Target, Internalformat, Width, Format, Type, Table) -> 'ok' when Target :: enum(),Internalformat :: enum(),Width :: integer(),Format :: enum(),Type :: enum(),Table :: offset()|mem().
 colorTable(Target,Internalformat,Width,Format,Type,Table) when  is_integer(Table) ->
   cast(5324, <<Target:?GLenum,Internalformat:?GLenum,Width:?GLsizei,Format:?GLenum,Type:?GLenum,Table:?GLuint>>);
@@ -8218,17 +3204,7 @@ colorTable(Target,Internalformat,Width,Format,Type,Table) ->
 %% color table the scale and bias terms apply to; it must be set to `?GL_COLOR_TABLE', `?GL_POST_CONVOLUTION_COLOR_TABLE'
 %% , or `?GL_POST_COLOR_MATRIX_COLOR_TABLE'. 
 %%
-%%  `Pname'  must be `?GL_COLOR_TABLE_SCALE' to set the scale factors. In this case,
-%%  `Params'  points to an array of four values, which are the scale factors for red,
-%% green, blue, and alpha, in that order. 
-%%
-%%  `Pname'  must be `?GL_COLOR_TABLE_BIAS' to set the bias terms. In this case,  `Params' 
-%%  points to an array of four values, which are the bias terms for red, green, blue, and
-%% alpha, in that order. 
-%%
-%%  The color tables themselves are specified by calling  {@link gl:colorTable/6} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorTableParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glColorTableParameter.xml">external</a> documentation.
 -spec colorTableParameterfv(Target, Pname, Params) -> 'ok' when Target :: enum(),Pname :: enum(),Params :: {float(),float(),float(),float()}.
 colorTableParameterfv(Target,Pname,{P1,P2,P3,P4}) ->
   cast(5326, <<Target:?GLenum,Pname:?GLenum,P1:?GLfloat,P2:?GLfloat,P3:?GLfloat,P4:?GLfloat>>).
@@ -8244,41 +3220,7 @@ colorTableParameteriv(Target,Pname,{P1,P2,P3,P4}) ->
 %% ``gl:copyColorTable'' loads a color table with pixels from the current `?GL_READ_BUFFER'
 %%  (rather than from main memory, as is the case for  {@link gl:colorTable/6} ). 
 %%
-%%  The screen-aligned pixel rectangle with lower-left corner at ( `X' ,  `Y' ) having
-%% width  `Width'  and height 1 is loaded into the color table. If any pixels within this
-%% region are outside the window that is associated with the GL context, the values obtained
-%% for those pixels are undefined. 
-%%
-%%  The pixels in the rectangle are processed just as if  {@link gl:readPixels/7}  were called,
-%% with  `Internalformat'  set to RGBA, but processing stops after the final conversion
-%% to RGBA. 
-%%
-%%  The four scale parameters and the four bias parameters that are defined for the table
-%% are then used to scale and bias the R, G, B, and A components of each pixel. The scale
-%% and bias parameters are set by calling  {@link gl:colorTableParameterfv/3} . 
-%%
-%%  Next, the R, G, B, and A values are clamped to the range  [0 1]. Each pixel is then converted
-%% to the internal format specified by  `Internalformat' . This conversion simply maps
-%% the component values of the pixel (R, G, B, and A) to the values included in the internal
-%% format (red, green, blue, alpha, luminance, and intensity). The mapping is as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Format '</td><td>` Red '</td><td>` Green '</td>
-%% <td>` Blue '</td><td>` Alpha '</td><td>` Luminance '</td><td>` Intensity '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ALPHA'</td><td></td><td></td><td></td><td> A </td>
-%% <td></td><td></td></tr><tr><td>`?GL_LUMINANCE'</td><td></td><td></td><td></td><td></td>
-%% <td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td></td><td></td><td></td>
-%% <td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'</td><td></td><td></td><td>
-%% </td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td><td> R </td><td> G </td>
-%% <td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'</td><td> R </td><td>
-%% G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%%
-%%  Finally, the red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in the color table. They form a one-dimensional table with indices in
-%% the range [0 width-1]. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyColorTable.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCopyColorTable.xml">external</a> documentation.
 -spec copyColorTable(Target, Internalformat, X, Y, Width) -> 'ok' when Target :: enum(),Internalformat :: enum(),X :: integer(),Y :: integer(),Width :: integer().
 copyColorTable(Target,Internalformat,X,Y,Width) ->
   cast(5328, <<Target:?GLenum,Internalformat:?GLenum,X:?GLint,Y:?GLint,Width:?GLsizei>>).
@@ -8289,21 +3231,7 @@ copyColorTable(Target,Internalformat,X,Y,Width) ->
 %% by  `Target' . No pixel transfer operations are performed, but pixel storage modes
 %% that are applicable to  {@link gl:readPixels/7}  are performed. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a histogram table is requested,  `Table'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  Color components that are requested in the specified  `Format' , but which are not
-%% included in the internal format of the color lookup table, are returned as zero. The assignments
-%% of internal color components to the components requested by  `Format'  are <table><tbody>
-%% <tr><td>` Internal Component '</td><td>` Resulting Component '</td></tr></tbody>
-%% <tbody><tr><td> Red </td><td> Red </td></tr><tr><td> Green </td><td> Green </td></tr><tr><td>
-%%  Blue </td><td> Blue </td></tr><tr><td> Alpha </td><td> Alpha </td></tr><tr><td> Luminance
-%% </td><td> Red </td></tr><tr><td> Intensity </td><td> Red </td></tr></tbody></table>
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetColorTable.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetColorTable.xml">external</a> documentation.
 -spec getColorTable(Target, Format, Type, Table) -> 'ok' when Target :: enum(),Format :: enum(),Type :: enum(),Table :: mem().
 getColorTable(Target,Format,Type,Table) ->
   send_bin(Table),
@@ -8313,36 +3241,7 @@ getColorTable(Target,Format,Type,Table) ->
 %%
 %%  Returns parameters specific to color table  `Target' . 
 %%
-%%  When  `Pname'  is set to `?GL_COLOR_TABLE_SCALE' or `?GL_COLOR_TABLE_BIAS',
-%% ``gl:getColorTableParameter'' returns the color table scale or bias parameters for the
-%% table specified by  `Target' . For these queries,  `Target'  must be set to `?GL_COLOR_TABLE'
-%% , `?GL_POST_CONVOLUTION_COLOR_TABLE', or `?GL_POST_COLOR_MATRIX_COLOR_TABLE'
-%% and  `Params'  points to an array of four elements, which receive the scale or bias
-%% factors for red, green, blue, and alpha, in that order. 
-%%
-%% ``gl:getColorTableParameter'' can also be used to retrieve the format and size parameters
-%% for a color table. For these queries, set  `Target'  to either the color table target
-%% or the proxy color table target. The format and size parameters are set by  {@link gl:colorTable/6} 
-%% . 
-%%
-%%  The following table lists the format and size parameters that may be queried. For each
-%% symbolic constant listed below for  `Pname' ,  `Params'  must point to an array
-%% of the given length and receive the values indicated. 
-%%
-%% <table><tbody><tr><td>` Parameter '</td><td>` N '</td><td>` Meaning '</td></tr>
-%% </tbody><tbody><tr><td>`?GL_COLOR_TABLE_FORMAT'</td><td> 1 </td><td> Internal format
-%% (e.g., `?GL_RGBA') </td></tr><tr><td>`?GL_COLOR_TABLE_WIDTH'</td><td> 1 </td><td>
-%%  Number of elements in table </td></tr><tr><td>`?GL_COLOR_TABLE_RED_SIZE'</td><td>
-%% 1 </td><td> Size of red component, in bits </td></tr><tr><td>`?GL_COLOR_TABLE_GREEN_SIZE'
-%% </td><td> 1 </td><td> Size of green component </td></tr><tr><td>`?GL_COLOR_TABLE_BLUE_SIZE'
-%% </td><td> 1 </td><td> Size of blue component </td></tr><tr><td>`?GL_COLOR_TABLE_ALPHA_SIZE'
-%% </td><td> 1 </td><td> Size of alpha component </td></tr><tr><td>`?GL_COLOR_TABLE_LUMINANCE_SIZE'
-%% </td><td> 1 </td><td> Size of luminance component </td></tr><tr><td>`?GL_COLOR_TABLE_INTENSITY_SIZE'
-%% </td><td> 1 </td><td> Size of intensity component </td></tr></tbody></table>
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetColorTableParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetColorTableParameter.xml">external</a> documentation.
 -spec getColorTableParameterfv(Target, Pname) -> {float(),float(),float(),float()} when Target :: enum(),Pname :: enum().
 getColorTableParameterfv(Target,Pname) ->
   call(5330, <<Target:?GLenum,Pname:?GLenum>>).
@@ -8362,11 +3261,7 @@ getColorTableParameteriv(Target,Pname) ->
 %% originally specified. It is not an error to specify a subtexture with width of 0, but
 %% such a specification has no effect. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a portion of a color table is respecified,  `Data' 
-%% is treated as a byte offset into the buffer object's data store. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorSubTable.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glColorSubTable.xml">external</a> documentation.
 -spec colorSubTable(Target, Start, Count, Format, Type, Data) -> 'ok' when Target :: enum(),Start :: integer(),Count :: integer(),Format :: enum(),Type :: enum(),Data :: offset()|mem().
 colorSubTable(Target,Start,Count,Format,Type,Data) when  is_integer(Data) ->
   cast(5332, <<Target:?GLenum,Start:?GLsizei,Count:?GLsizei,Format:?GLenum,Type:?GLenum,Data:?GLuint>>);
@@ -8383,7 +3278,7 @@ colorSubTable(Target,Start,Count,Format,Type,Data) ->
 %% specified. It is not an error to specify a subtexture with width of 0, but such a specification
 %% has no effect. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyColorSubTable.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCopyColorSubTable.xml">external</a> documentation.
 -spec copyColorSubTable(Target, Start, X, Y, Width) -> 'ok' when Target :: enum(),Start :: integer(),X :: integer(),Y :: integer(),Width :: integer().
 copyColorSubTable(Target,Start,X,Y,Width) ->
   cast(5334, <<Target:?GLenum,Start:?GLsizei,X:?GLint,Y:?GLint,Width:?GLsizei>>).
@@ -8393,50 +3288,7 @@ copyColorSubTable(Target,Start,X,Y,Width) ->
 %% ``gl:convolutionFilter1D'' builds a one-dimensional convolution filter kernel from an
 %% array of pixels. 
 %%
-%%  The pixel array specified by  `Width' ,  `Format' ,  `Type' , and  `Data' 
-%% is extracted from memory and processed just as if  {@link gl:drawPixels/5}  were called,
-%% but processing stops after the final expansion to RGBA is completed. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a convolution filter is specified,  `Data'  is
-%% treated as a byte offset into the buffer object's data store. 
-%%
-%%  The R, G, B, and A components of each pixel are next scaled by the four 1D `?GL_CONVOLUTION_FILTER_SCALE'
-%%  parameters and biased by the four 1D `?GL_CONVOLUTION_FILTER_BIAS' parameters. (The
-%% scale and bias parameters are set by  {@link gl:convolutionParameterf/3}  using the `?GL_CONVOLUTION_1D'
-%%  target and the names `?GL_CONVOLUTION_FILTER_SCALE' and `?GL_CONVOLUTION_FILTER_BIAS'
-%% . The parameters themselves are vectors of four values that are applied to red, green,
-%% blue, and alpha, in that order.) The R, G, B, and A values are not clamped to [0,1] at
-%% any time during this process. 
-%%
-%%  Each pixel is then converted to the internal format specified by  `Internalformat' .
-%% This conversion simply maps the component values of the pixel (R, G, B, and A) to the
-%% values included in the internal format (red, green, blue, alpha, luminance, and intensity).
-%% The mapping is as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Format '</td><td>` Red '</td><td>` Green '</td>
-%% <td>` Blue '</td><td>` Alpha '</td><td>` Luminance '</td><td>` Intensity '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ALPHA'</td><td></td><td></td><td></td><td> A </td>
-%% <td></td><td></td></tr><tr><td>`?GL_LUMINANCE'</td><td></td><td></td><td></td><td></td>
-%% <td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td></td><td></td><td></td>
-%% <td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'</td><td></td><td></td><td>
-%% </td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td><td> R </td><td> G </td>
-%% <td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'</td><td> R </td><td>
-%% G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%%
-%%  The red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in floating-point rather than integer format. They form a one-dimensional
-%% filter kernel image indexed with coordinate `i' such that `i' starts at 0 and
-%% increases from left to right. Kernel location `i' is derived from the `i'th
-%% pixel, counting from 0. 
-%%
-%%  Note that after a convolution is performed, the resulting color components are also scaled
-%% by their corresponding `?GL_POST_CONVOLUTION_c_SCALE' parameters and biased by their
-%% corresponding `?GL_POST_CONVOLUTION_c_BIAS' parameters (where `c' takes on the
-%% values `RED', `GREEN', `BLUE', and `ALPHA'). These parameters are
-%% set by  {@link gl:pixelTransferf/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glConvolutionFilter1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glConvolutionFilter1D.xml">external</a> documentation.
 -spec convolutionFilter1D(Target, Internalformat, Width, Format, Type, Image) -> 'ok' when Target :: enum(),Internalformat :: enum(),Width :: integer(),Format :: enum(),Type :: enum(),Image :: offset()|mem().
 convolutionFilter1D(Target,Internalformat,Width,Format,Type,Image) when  is_integer(Image) ->
   cast(5335, <<Target:?GLenum,Internalformat:?GLenum,Width:?GLsizei,Format:?GLenum,Type:?GLenum,Image:?GLuint>>);
@@ -8449,51 +3301,7 @@ convolutionFilter1D(Target,Internalformat,Width,Format,Type,Image) ->
 %% ``gl:convolutionFilter2D'' builds a two-dimensional convolution filter kernel from an
 %% array of pixels. 
 %%
-%%  The pixel array specified by  `Width' ,  `Height' ,  `Format' ,  `Type' ,
-%% and  `Data'  is extracted from memory and processed just as if  {@link gl:drawPixels/5} 
-%% were called, but processing stops after the final expansion to RGBA is completed. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a convolution filter is specified,  `Data'  is
-%% treated as a byte offset into the buffer object's data store. 
-%%
-%%  The R, G, B, and A components of each pixel are next scaled by the four 2D `?GL_CONVOLUTION_FILTER_SCALE'
-%%  parameters and biased by the four 2D `?GL_CONVOLUTION_FILTER_BIAS' parameters. (The
-%% scale and bias parameters are set by  {@link gl:convolutionParameterf/3}  using the `?GL_CONVOLUTION_2D'
-%%  target and the names `?GL_CONVOLUTION_FILTER_SCALE' and `?GL_CONVOLUTION_FILTER_BIAS'
-%% . The parameters themselves are vectors of four values that are applied to red, green,
-%% blue, and alpha, in that order.) The R, G, B, and A values are not clamped to [0,1] at
-%% any time during this process. 
-%%
-%%  Each pixel is then converted to the internal format specified by  `Internalformat' .
-%% This conversion simply maps the component values of the pixel (R, G, B, and A) to the
-%% values included in the internal format (red, green, blue, alpha, luminance, and intensity).
-%% The mapping is as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Format '</td><td>` Red '</td><td>` Green '</td>
-%% <td>` Blue '</td><td>` Alpha '</td><td>` Luminance '</td><td>` Intensity '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ALPHA'</td><td></td><td></td><td></td><td> A </td>
-%% <td></td><td></td></tr><tr><td>`?GL_LUMINANCE'</td><td></td><td></td><td></td><td></td>
-%% <td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td></td><td></td><td></td>
-%% <td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'</td><td></td><td></td><td>
-%% </td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td><td> R </td><td> G </td>
-%% <td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'</td><td> R </td><td>
-%% G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%%
-%%  The red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in floating-point rather than integer format. They form a two-dimensional
-%% filter kernel image indexed with coordinates `i' and `j' such that `i'
-%% starts at zero and increases from left to right, and `j' starts at zero and increases
-%% from bottom to top. Kernel location `i,j' is derived from the `N'th pixel, where
-%% `N' is `i'+`j'* `Width' . 
-%%
-%%  Note that after a convolution is performed, the resulting color components are also scaled
-%% by their corresponding `?GL_POST_CONVOLUTION_c_SCALE' parameters and biased by their
-%% corresponding `?GL_POST_CONVOLUTION_c_BIAS' parameters (where `c' takes on the
-%% values `RED', `GREEN', `BLUE', and `ALPHA'). These parameters are
-%% set by  {@link gl:pixelTransferf/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glConvolutionFilter2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glConvolutionFilter2D.xml">external</a> documentation.
 -spec convolutionFilter2D(Target, Internalformat, Width, Height, Format, Type, Image) -> 'ok' when Target :: enum(),Internalformat :: enum(),Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Image :: offset()|mem().
 convolutionFilter2D(Target,Internalformat,Width,Height,Format,Type,Image) when  is_integer(Image) ->
   cast(5337, <<Target:?GLenum,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei,Format:?GLenum,Type:?GLenum,Image:?GLuint>>);
@@ -8505,36 +3313,7 @@ convolutionFilter2D(Target,Internalformat,Width,Height,Format,Type,Image) ->
 %%
 %% ``gl:convolutionParameter'' sets the value of a convolution parameter. 
 %%
-%%  `Target'  selects the convolution filter to be affected: `?GL_CONVOLUTION_1D', `?GL_CONVOLUTION_2D'
-%% , or `?GL_SEPARABLE_2D' for the 1D, 2D, or separable 2D filter, respectively. 
-%%
-%%  `Pname'  selects the parameter to be changed. `?GL_CONVOLUTION_FILTER_SCALE'
-%% and `?GL_CONVOLUTION_FILTER_BIAS' affect the definition of the convolution filter
-%% kernel; see  {@link gl:convolutionFilter1D/6} ,  {@link gl:convolutionFilter2D/7} , and  {@link gl:separableFilter2D/8} 
-%%  for details. In these cases,  `Params' v is an array of four values to be applied
-%% to red, green, blue, and alpha values, respectively. The initial value for `?GL_CONVOLUTION_FILTER_SCALE'
-%%  is (1, 1, 1, 1), and the initial value for `?GL_CONVOLUTION_FILTER_BIAS' is (0,
-%% 0, 0, 0). 
-%%
-%%  A  `Pname'  value of `?GL_CONVOLUTION_BORDER_MODE' controls the convolution border
-%% mode. The accepted modes are: 
-%%
-%% `?GL_REDUCE':  The image resulting from convolution is smaller than the source image.
-%% If the filter width is   Wf and height is   Hf, and the source image width is   Ws and
-%% height is   Hs, then the convolved image width will be   Ws-Wf+1 and height will be   Hs-Hf
-%% +1. (If this reduction would generate an image with zero or negative width and/or height,
-%% the output is simply null, with no error generated.) The coordinates of the image resulting
-%% from convolution are zero through   Ws-Wf in width and zero through   Hs-Hf in height. 
-%%
-%% `?GL_CONSTANT_BORDER':  The image resulting from convolution is the same size as
-%% the source image, and processed as if the source image were surrounded by pixels with
-%% their color specified by the `?GL_CONVOLUTION_BORDER_COLOR'. 
-%%
-%% `?GL_REPLICATE_BORDER':  The image resulting from convolution is the same size as
-%% the source image, and processed as if the outermost pixel on the border of the source
-%% image were replicated. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glConvolutionParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glConvolutionParameter.xml">external</a> documentation.
 -spec convolutionParameterf(Target, Pname, Params) -> 'ok' when Target :: enum(),Pname :: enum(),Params :: tuple().
 convolutionParameterf(Target,Pname,Params) ->
   cast(5339, <<Target:?GLenum,Pname:?GLenum,(size(Params)):?GLuint,
@@ -8561,49 +3340,7 @@ convolutionParameteriv(Target,Pname,{Params}) ->  convolutionParameteri(Target,P
 %% pixels from the current `?GL_READ_BUFFER' (rather than from main memory, as is the
 %% case for  {@link gl:convolutionFilter1D/6} ). 
 %%
-%%  The screen-aligned pixel rectangle with lower-left corner at ( `X' ,  `Y' ), width
-%%  `Width'  and height 1 is used to define the convolution filter. If any pixels within
-%% this region are outside the window that is associated with the GL context, the values
-%% obtained for those pixels are undefined. 
-%%
-%%  The pixels in the rectangle are processed exactly as if  {@link gl:readPixels/7}  had been
-%% called with `format' set to RGBA, but the process stops just before final conversion.
-%% The R, G, B, and A components of each pixel are next scaled by the four 1D `?GL_CONVOLUTION_FILTER_SCALE'
-%%  parameters and biased by the four 1D `?GL_CONVOLUTION_FILTER_BIAS' parameters. (The
-%% scale and bias parameters are set by  {@link gl:convolutionParameterf/3}  using the `?GL_CONVOLUTION_1D'
-%%  target and the names `?GL_CONVOLUTION_FILTER_SCALE' and `?GL_CONVOLUTION_FILTER_BIAS'
-%% . The parameters themselves are vectors of four values that are applied to red, green,
-%% blue, and alpha, in that order.) The R, G, B, and A values are not clamped to [0,1] at
-%% any time during this process. 
-%%
-%%  Each pixel is then converted to the internal format specified by  `Internalformat' .
-%% This conversion simply maps the component values of the pixel (R, G, B, and A) to the
-%% values included in the internal format (red, green, blue, alpha, luminance, and intensity).
-%% The mapping is as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Format '</td><td>` Red '</td><td>` Green '</td>
-%% <td>` Blue '</td><td>` Alpha '</td><td>` Luminance '</td><td>` Intensity '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ALPHA'</td><td></td><td></td><td></td><td> A </td>
-%% <td></td><td></td></tr><tr><td>`?GL_LUMINANCE'</td><td></td><td></td><td></td><td></td>
-%% <td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td></td><td></td><td></td>
-%% <td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'</td><td></td><td></td><td>
-%% </td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td><td> R </td><td> G </td>
-%% <td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'</td><td> R </td><td>
-%% G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%%
-%%  The red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in floating-point rather than integer format. 
-%%
-%%  Pixel ordering is such that lower x screen coordinates correspond to lower `i' filter
-%% image coordinates. 
-%%
-%%  Note that after a convolution is performed, the resulting color components are also scaled
-%% by their corresponding `?GL_POST_CONVOLUTION_c_SCALE' parameters and biased by their
-%% corresponding `?GL_POST_CONVOLUTION_c_BIAS' parameters (where `c' takes on the
-%% values `RED', `GREEN', `BLUE', and `ALPHA'). These parameters are
-%% set by  {@link gl:pixelTransferf/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyConvolutionFilter1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCopyConvolutionFilter1D.xml">external</a> documentation.
 -spec copyConvolutionFilter1D(Target, Internalformat, X, Y, Width) -> 'ok' when Target :: enum(),Internalformat :: enum(),X :: integer(),Y :: integer(),Width :: integer().
 copyConvolutionFilter1D(Target,Internalformat,X,Y,Width) ->
   cast(5341, <<Target:?GLenum,Internalformat:?GLenum,X:?GLint,Y:?GLint,Width:?GLsizei>>).
@@ -8614,50 +3351,7 @@ copyConvolutionFilter1D(Target,Internalformat,X,Y,Width) ->
 %% pixels from the current `?GL_READ_BUFFER' (rather than from main memory, as is the
 %% case for  {@link gl:convolutionFilter2D/7} ). 
 %%
-%%  The screen-aligned pixel rectangle with lower-left corner at ( `X' ,  `Y' ), width
-%%  `Width'  and height  `Height'  is used to define the convolution filter. If any
-%% pixels within this region are outside the window that is associated with the GL context,
-%% the values obtained for those pixels are undefined. 
-%%
-%%  The pixels in the rectangle are processed exactly as if  {@link gl:readPixels/7}  had been
-%% called with `format' set to RGBA, but the process stops just before final conversion.
-%% The R, G, B, and A components of each pixel are next scaled by the four 2D `?GL_CONVOLUTION_FILTER_SCALE'
-%%  parameters and biased by the four 2D `?GL_CONVOLUTION_FILTER_BIAS' parameters. (The
-%% scale and bias parameters are set by  {@link gl:convolutionParameterf/3}  using the `?GL_CONVOLUTION_2D'
-%%  target and the names `?GL_CONVOLUTION_FILTER_SCALE' and `?GL_CONVOLUTION_FILTER_BIAS'
-%% . The parameters themselves are vectors of four values that are applied to red, green,
-%% blue, and alpha, in that order.) The R, G, B, and A values are not clamped to [0,1] at
-%% any time during this process. 
-%%
-%%  Each pixel is then converted to the internal format specified by  `Internalformat' .
-%% This conversion simply maps the component values of the pixel (R, G, B, and A) to the
-%% values included in the internal format (red, green, blue, alpha, luminance, and intensity).
-%% The mapping is as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Format '</td><td>` Red '</td><td>` Green '</td>
-%% <td>` Blue '</td><td>` Alpha '</td><td>` Luminance '</td><td>` Intensity '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ALPHA'</td><td></td><td></td><td></td><td> A </td>
-%% <td></td><td></td></tr><tr><td>`?GL_LUMINANCE'</td><td></td><td></td><td></td><td></td>
-%% <td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td><td></td><td></td><td></td>
-%% <td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'</td><td></td><td></td><td>
-%% </td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td><td> R </td><td> G </td>
-%% <td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'</td><td> R </td><td>
-%% G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%%
-%%  The red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in floating-point rather than integer format. 
-%%
-%%  Pixel ordering is such that lower x screen coordinates correspond to lower `i' filter
-%% image coordinates, and lower y screen coordinates correspond to lower `j' filter
-%% image coordinates. 
-%%
-%%  Note that after a convolution is performed, the resulting color components are also scaled
-%% by their corresponding `?GL_POST_CONVOLUTION_c_SCALE' parameters and biased by their
-%% corresponding `?GL_POST_CONVOLUTION_c_BIAS' parameters (where `c' takes on the
-%% values `RED', `GREEN', `BLUE', and `ALPHA'). These parameters are
-%% set by  {@link gl:pixelTransferf/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyConvolutionFilter2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glCopyConvolutionFilter2D.xml">external</a> documentation.
 -spec copyConvolutionFilter2D(Target, Internalformat, X, Y, Width, Height) -> 'ok' when Target :: enum(),Internalformat :: enum(),X :: integer(),Y :: integer(),Width :: integer(),Height :: integer().
 copyConvolutionFilter2D(Target,Internalformat,X,Y,Width,Height) ->
   cast(5342, <<Target:?GLenum,Internalformat:?GLenum,X:?GLint,Y:?GLint,Width:?GLsizei,Height:?GLsizei>>).
@@ -8669,21 +3363,7 @@ copyConvolutionFilter2D(Target,Internalformat,X,Y,Width,Height) ->
 %% specifications in  `Format'  and  `Type' . No pixel transfer operations are performed
 %% on this image, but the relevant pixel storage modes are applied. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a convolution filter is requested,  `Image'  is
-%% treated as a byte offset into the buffer object's data store. 
-%%
-%%  Color components that are present in  `Format'  but not included in the internal format
-%% of the filter are returned as zero. The assignments of internal color components to the
-%% components of  `Format'  are as follows. <table><tbody><tr><td>` Internal Component '
-%% </td><td>` Resulting Component '</td></tr></tbody><tbody><tr><td> Red </td><td> Red </td>
-%% </tr><tr><td> Green </td><td> Green </td></tr><tr><td> Blue </td><td> Blue </td></tr><tr><td>
-%%  Alpha </td><td> Alpha </td></tr><tr><td> Luminance </td><td> Red </td></tr><tr><td> Intensity
-%% </td><td> Red </td></tr></tbody></table>
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetConvolutionFilter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetConvolutionFilter.xml">external</a> documentation.
 -spec getConvolutionFilter(Target, Format, Type, Image) -> 'ok' when Target :: enum(),Format :: enum(),Type :: enum(),Image :: mem().
 getConvolutionFilter(Target,Format,Type,Image) ->
   send_bin(Image),
@@ -8695,34 +3375,7 @@ getConvolutionFilter(Target,Format,Type,Image) ->
 %% which convolution filter is queried.  `Pname'  determines which parameter is returned:
 %% 
 %%
-%% `?GL_CONVOLUTION_BORDER_MODE':  The convolution border mode. See  {@link gl:convolutionParameterf/3} 
-%%  for a list of border modes. 
-%%
-%% `?GL_CONVOLUTION_BORDER_COLOR':  The current convolution border color.  `Params' 
-%% must be a pointer to an array of four elements, which will receive the red, green, blue,
-%% and alpha border colors. 
-%%
-%% `?GL_CONVOLUTION_FILTER_SCALE':  The current filter scale factors.  `Params' 
-%% must be a pointer to an array of four elements, which will receive the red, green, blue,
-%% and alpha filter scale factors in that order. 
-%%
-%% `?GL_CONVOLUTION_FILTER_BIAS':  The current filter bias factors.  `Params'  must
-%% be a pointer to an array of four elements, which will receive the red, green, blue, and
-%% alpha filter bias terms in that order. 
-%%
-%% `?GL_CONVOLUTION_FORMAT':  The current internal format. See  {@link gl:convolutionFilter1D/6} 
-%% ,  {@link gl:convolutionFilter2D/7} , and  {@link gl:separableFilter2D/8}  for lists of allowable
-%% formats. 
-%%
-%% `?GL_CONVOLUTION_WIDTH':  The current filter image width. 
-%%
-%% `?GL_CONVOLUTION_HEIGHT':  The current filter image height. 
-%%
-%% `?GL_MAX_CONVOLUTION_WIDTH':  The maximum acceptable filter image width. 
-%%
-%% `?GL_MAX_CONVOLUTION_HEIGHT':  The maximum acceptable filter image height. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetConvolutionParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetConvolutionParameter.xml">external</a> documentation.
 -spec getConvolutionParameterfv(Target, Pname) -> {float(),float(),float(),float()} when Target :: enum(),Pname :: enum().
 getConvolutionParameterfv(Target,Pname) ->
   call(5344, <<Target:?GLenum,Pname:?GLenum>>).
@@ -8738,52 +3391,7 @@ getConvolutionParameteriv(Target,Pname) ->
 %% ``gl:separableFilter2D'' builds a two-dimensional separable convolution filter kernel
 %% from two arrays of pixels. 
 %%
-%%  The pixel arrays specified by ( `Width' ,  `Format' ,  `Type' ,  `Row' )
-%% and ( `Height' ,  `Format' ,  `Type' ,  `Column' ) are processed just as if
-%% they had been passed to  {@link gl:drawPixels/5} , but processing stops after the final expansion
-%% to RGBA is completed. 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a convolution filter is specified,  `Row'  and  `Column' 
-%%  are treated as byte offsets into the buffer object's data store. 
-%%
-%%  Next, the R, G, B, and A components of all pixels in both arrays are scaled by the four
-%% separable 2D `?GL_CONVOLUTION_FILTER_SCALE' parameters and biased by the four separable
-%% 2D `?GL_CONVOLUTION_FILTER_BIAS' parameters. (The scale and bias parameters are set
-%% by  {@link gl:convolutionParameterf/3}  using the `?GL_SEPARABLE_2D' target and the names
-%% `?GL_CONVOLUTION_FILTER_SCALE' and `?GL_CONVOLUTION_FILTER_BIAS'. The parameters
-%% themselves are vectors of four values that are applied to red, green, blue, and alpha,
-%% in that order.) The R, G, B, and A values are not clamped to [0,1] at any time during
-%% this process. 
-%%
-%%  Each pixel is then converted to the internal format specified by  `Internalformat' .
-%% This conversion simply maps the component values of the pixel (R, G, B, and A) to the
-%% values included in the internal format (red, green, blue, alpha, luminance, and intensity).
-%% The mapping is as follows: <table><tbody><tr><td>` Internal Format '</td><td>` Red '
-%% </td><td>` Green '</td><td>` Blue '</td><td>` Alpha '</td><td>` Luminance '
-%% </td><td>` Intensity '</td></tr></tbody><tbody><tr><td>`?GL_LUMINANCE'</td><td></td>
-%% <td></td><td></td><td></td><td> R </td><td></td></tr><tr><td>`?GL_LUMINANCE_ALPHA'</td>
-%% <td></td><td></td><td></td><td> A </td><td> R </td><td></td></tr><tr><td>`?GL_INTENSITY'
-%% </td><td></td><td></td><td></td><td></td><td></td><td> R </td></tr><tr><td>`?GL_RGB'</td>
-%% <td> R </td><td> G </td><td> B </td><td></td><td></td><td></td></tr><tr><td>`?GL_RGBA'
-%% </td><td> R </td><td> G </td><td> B </td><td> A </td><td></td><td></td></tr></tbody></table>
-%% 
-%%
-%%  The red, green, blue, alpha, luminance, and/or intensity components of the resulting
-%% pixels are stored in floating-point rather than integer format. They form two one-dimensional
-%% filter kernel images. The row image is indexed by coordinate `i' starting at zero
-%% and increasing from left to right. Each location in the row image is derived from element
-%% `i' of  `Row' . The column image is indexed by coordinate `j' starting at
-%% zero and increasing from bottom to top. Each location in the column image is derived from
-%% element `j' of  `Column' . 
-%%
-%%  Note that after a convolution is performed, the resulting color components are also scaled
-%% by their corresponding `?GL_POST_CONVOLUTION_c_SCALE' parameters and biased by their
-%% corresponding `?GL_POST_CONVOLUTION_c_BIAS' parameters (where `c' takes on the
-%% values `RED', `GREEN', `BLUE', and `ALPHA'). These parameters are
-%% set by  {@link gl:pixelTransferf/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSeparableFilter2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glSeparableFilter2D.xml">external</a> documentation.
 -spec separableFilter2D(Target, Internalformat, Width, Height, Format, Type, Row, Column) -> 'ok' when Target :: enum(),Internalformat :: enum(),Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Row :: offset()|mem(),Column :: offset()|mem().
 separableFilter2D(Target,Internalformat,Width,Height,Format,Type,Row,Column) when  is_integer(Row), is_integer(Column) ->
   cast(5346, <<Target:?GLenum,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei,Format:?GLenum,Type:?GLenum,Row:?GLuint,Column:?GLuint>>);
@@ -8798,21 +3406,7 @@ separableFilter2D(Target,Internalformat,Width,Height,Format,Type,Row,Column) ->
 %% the same width as the histogram. No pixel transfer operations are performed on this image,
 %% but pixel storage modes that are applicable to 1D images are honored. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a histogram table is requested,  `Values'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  Color components that are requested in the specified  `Format' , but which are not
-%% included in the internal format of the histogram, are returned as zero. The assignments
-%% of internal color components to the components requested by  `Format'  are: <table><tbody>
-%% <tr><td>` Internal Component '</td><td>` Resulting Component '</td></tr></tbody>
-%% <tbody><tr><td> Red </td><td> Red </td></tr><tr><td> Green </td><td> Green </td></tr><tr><td>
-%%  Blue </td><td> Blue </td></tr><tr><td> Alpha </td><td> Alpha </td></tr><tr><td> Luminance
-%% </td><td> Red </td></tr></tbody></table>
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetHistogram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetHistogram.xml">external</a> documentation.
 -spec getHistogram(Target, Reset, Format, Type, Values) -> 'ok' when Target :: enum(),Reset :: 0|1,Format :: enum(),Type :: enum(),Values :: mem().
 getHistogram(Target,Reset,Format,Type,Values) ->
   send_bin(Values),
@@ -8826,19 +3420,7 @@ getHistogram(Target,Reset,Format,Type,Values) ->
 %% table) or `?GL_PROXY_HISTOGRAM' (to obtain information from the most recent proxy
 %% request) and one of the following values for the  `Pname'  argument: 
 %%
-%% <table><tbody><tr><td>` Parameter '</td><td>` Description '</td></tr></tbody><tbody>
-%% <tr><td>`?GL_HISTOGRAM_WIDTH'</td><td> Histogram table width </td></tr><tr><td>`?GL_HISTOGRAM_FORMAT'
-%% </td><td> Internal format </td></tr><tr><td>`?GL_HISTOGRAM_RED_SIZE'</td><td> Red
-%% component counter size, in bits </td></tr><tr><td>`?GL_HISTOGRAM_GREEN_SIZE'</td><td>
-%%  Green component counter size, in bits </td></tr><tr><td>`?GL_HISTOGRAM_BLUE_SIZE'</td>
-%% <td> Blue component counter size, in bits </td></tr><tr><td>`?GL_HISTOGRAM_ALPHA_SIZE'
-%% </td><td> Alpha component counter size, in bits </td></tr><tr><td>`?GL_HISTOGRAM_LUMINANCE_SIZE'
-%% </td><td> Luminance component counter size, in bits </td></tr><tr><td>`?GL_HISTOGRAM_SINK'
-%% </td><td> Value of the `sink' parameter </td></tr></tbody></table>
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetHistogramParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetHistogramParameter.xml">external</a> documentation.
 -spec getHistogramParameterfv(Target, Pname) -> {float()} when Target :: enum(),Pname :: enum().
 getHistogramParameterfv(Target,Pname) ->
   call(5349, <<Target:?GLenum,Pname:?GLenum>>).
@@ -8857,26 +3439,7 @@ getHistogramParameteriv(Target,Pname) ->
 %% of the return values is determined by  `Format' , and their type is determined by  `Types' 
 %% . 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while minimum and maximum pixel values are requested,  `Values' 
-%%  is treated as a byte offset into the buffer object's data store. 
-%%
-%%  No pixel transfer operations are performed on the return values, but pixel storage modes
-%% that are applicable to one-dimensional images are performed. Color components that are
-%% requested in the specified  `Format' , but that are not included in the internal format
-%% of the minmax table, are returned as zero. The assignment of internal color components
-%% to the components requested by  `Format'  are as follows: 
-%%
-%% <table><tbody><tr><td>` Internal Component '</td><td>` Resulting Component '</td>
-%% </tr></tbody><tbody><tr><td> Red </td><td> Red </td></tr><tr><td> Green </td><td> Green </td>
-%% </tr><tr><td> Blue </td><td> Blue </td></tr><tr><td> Alpha </td><td> Alpha </td></tr><tr><td>
-%%  Luminance </td><td> Red </td></tr></tbody></table>
-%%
-%%  If  `Reset'  is `?GL_TRUE', the minmax table entries corresponding to the return
-%% values are reset to their initial values. Minimum and maximum values that are not returned
-%% are not modified, even if  `Reset'  is `?GL_TRUE'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetMinmax.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetMinmax.xml">external</a> documentation.
 -spec getMinmax(Target, Reset, Format, Types, Values) -> 'ok' when Target :: enum(),Reset :: 0|1,Format :: enum(),Types :: enum(),Values :: mem().
 getMinmax(Target,Reset,Format,Types,Values) ->
   send_bin(Values),
@@ -8887,14 +3450,7 @@ getMinmax(Target,Reset,Format,Types,Values) ->
 %% ``gl:getMinmaxParameter'' retrieves parameters for the current minmax table by setting  `Pname' 
 %%  to one of the following values: 
 %%
-%% <table><tbody><tr><td>` Parameter '</td><td>` Description '</td></tr></tbody><tbody>
-%% <tr><td>`?GL_MINMAX_FORMAT'</td><td> Internal format of minmax table </td></tr><tr><td>
-%% `?GL_MINMAX_SINK'</td><td> Value of the `sink' parameter </td></tr></tbody></table>
-%% 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetMinmaxParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetMinmaxParameter.xml">external</a> documentation.
 -spec getMinmaxParameterfv(Target, Pname) -> {float()} when Target :: enum(),Pname :: enum().
 getMinmaxParameterfv(Target,Pname) ->
   call(5352, <<Target:?GLenum,Pname:?GLenum>>).
@@ -8915,26 +3471,7 @@ getMinmaxParameteriv(Target,Pname) ->
 %% to be incremented.) If a histogram table entry is incremented beyond its maximum value,
 %% then its value becomes undefined. (This is not an error.) 
 %%
-%%  Histogramming is performed only for RGBA pixels (though these may be specified originally
-%% as color indices and converted to RGBA by index table lookup). Histogramming is enabled
-%% with  {@link gl:enable/1}  and disabled with  {@link gl:enable/1} . 
-%%
-%%  When  `Target'  is `?GL_HISTOGRAM', ``gl:histogram'' redefines the current
-%% histogram table to have  `Width'  entries of the format specified by  `Internalformat' 
-%% . The entries are indexed 0 through   width-1, and all entries are initialized to zero.
-%% The values in the previous histogram table, if any, are lost. If  `Sink'  is `?GL_TRUE'
-%% , then pixels are discarded after histogramming; no further processing of the pixels takes
-%% place, and no drawing, texture loading, or pixel readback will result. 
-%%
-%%  When  `Target'  is `?GL_PROXY_HISTOGRAM', ``gl:histogram'' computes all state
-%% information as if the histogram table were to be redefined, but does not actually define
-%% the new table. If the requested histogram table is too large to be supported, then the
-%% state information will be set to zero. This provides a way to determine if a histogram
-%% table with the given parameters can be supported. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glHistogram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glHistogram.xml">external</a> documentation.
 -spec histogram(Target, Width, Internalformat, Sink) -> 'ok' when Target :: enum(),Width :: integer(),Internalformat :: enum(),Sink :: 0|1.
 histogram(Target,Width,Internalformat,Sink) ->
   cast(5354, <<Target:?GLenum,Width:?GLsizei,Internalformat:?GLenum,Sink:?GLboolean>>).
@@ -8954,16 +3491,7 @@ histogram(Target,Width,Internalformat,Sink) ->
 %% calling  {@link gl:enable/1}  or  {@link gl:enable/1} , respectively, with an argument of `?GL_MINMAX'
 %% . 
 %%
-%% ``gl:minmax'' redefines the current minmax table to have entries of the format specified
-%% by  `Internalformat' . The maximum element is initialized with the smallest possible
-%% component values, and the minimum element is initialized with the largest possible component
-%% values. The values in the previous minmax table, if any, are lost. If  `Sink'  is `?GL_TRUE'
-%% , then pixels are discarded after minmax; no further processing of the pixels takes place,
-%% and no drawing, texture loading, or pixel readback will result. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMinmax.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMinmax.xml">external</a> documentation.
 -spec minmax(Target, Internalformat, Sink) -> 'ok' when Target :: enum(),Internalformat :: enum(),Sink :: 0|1.
 minmax(Target,Internalformat,Sink) ->
   cast(5355, <<Target:?GLenum,Internalformat:?GLenum,Sink:?GLboolean>>).
@@ -8972,7 +3500,7 @@ minmax(Target,Internalformat,Sink) ->
 %%
 %% ``gl:resetHistogram'' resets all the elements of the current histogram table to zero. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glResetHistogram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glResetHistogram.xml">external</a> documentation.
 -spec resetHistogram(Target) -> 'ok' when Target :: enum().
 resetHistogram(Target) ->
   cast(5356, <<Target:?GLenum>>).
@@ -8983,7 +3511,7 @@ resetHistogram(Target) ->
 %% values: the ``maximum'' element receives the minimum possible component values, and the
 %% ``minimum'' element receives the maximum possible component values. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glResetMinmax.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glResetMinmax.xml">external</a> documentation.
 -spec resetMinmax(Target) -> 'ok' when Target :: enum().
 resetMinmax(Target) ->
   cast(5357, <<Target:?GLenum>>).
@@ -8994,7 +3522,7 @@ resetMinmax(Target) ->
 %% affect. The number of texture units an implementation supports is implementation dependent,
 %% but must be at least 80. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glActiveTexture.xhtml">external</a> documentation.
 -spec activeTexture(Texture) -> 'ok' when Texture :: enum().
 activeTexture(Texture) ->
   cast(5358, <<Texture:?GLenum>>).
@@ -9005,22 +3533,7 @@ activeTexture(Texture) ->
 %% locations to generate antialiasing effects. Multisampling transparently antialiases points,
 %% lines, polygons, and images if it is enabled. 
 %%
-%%  `Value'  is used in constructing a temporary mask used in determining which samples
-%% will be used in resolving the final fragment color. This mask is bitwise-anded with the
-%% coverage mask generated from the multisampling computation. If the  `Invert'  flag
-%% is set, the temporary mask is inverted (all bits flipped) and then the bitwise-and is
-%% computed. 
-%%
-%%  If an implementation does not have any multisample buffers available, or multisampling
-%% is disabled, rasterization occurs with only a single sample computing a pixel's final
-%% RGB color. 
-%%
-%%  Provided an implementation supports multisample buffers, and multisampling is enabled,
-%% then a pixel's final color is generated by combining several samples per pixel. Each sample
-%% contains color, depth, and stencil information, allowing those operations to be performed
-%% on each sample. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSampleCoverage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glSampleCoverage.xhtml">external</a> documentation.
 -spec sampleCoverage(Value, Invert) -> 'ok' when Value :: clamp(),Invert :: 0|1.
 sampleCoverage(Value,Invert) ->
   cast(5359, <<Value:?GLclampf,Invert:?GLboolean>>).
@@ -9029,56 +3542,7 @@ sampleCoverage(Value,Invert) ->
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%% ``gl:compressedTexImage3D'' loads a previously defined, and retrieved, compressed three-dimensional
-%% texture image if  `Target'  is `?GL_TEXTURE_3D' (see  {@link gl:texImage3D/10} ). 
-%%
-%%  If  `Target'  is `?GL_TEXTURE_2D_ARRAY',  `Data'  is treated as an array of
-%% compressed 2D textures. 
-%%
-%%  If  `Target'  is `?GL_PROXY_TEXTURE_3D' or `?GL_PROXY_TEXTURE_2D_ARRAY',
-%% no data is read from  `Data' , but all of the texture image state is recalculated,
-%% checked for consistency, and checked against the implementation's capabilities. If the
-%% implementation cannot handle a texture of the requested texture size, it sets all of the
-%% image state to 0, but does not generate an error (see  {@link gl:getError/0} ). To query
-%% for an entire mipmap array, use an image array level greater than or equal to 1. 
-%%
-%%  `Internalformat'  must be a known compressed image format (such as `?GL_RGTC')
-%% or an extension-specified compressed-texture format. When a texture is loaded with  {@link gl:texImage2D/9} 
-%%  using a generic compressed texture format (e.g., `?GL_COMPRESSED_RGB'), the GL selects
-%% from one of its extensions supporting compressed textures. In order to load the compressed
-%% texture image using ``gl:compressedTexImage3D'', query the compressed texture image's
-%% size and format using  {@link gl:getTexLevelParameterfv/3} . 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  If the compressed data are arranged into fixed-size blocks of texels, the pixel storage
-%% modes can be used to select a sub-rectangle from a larger containing rectangle. These
-%% pixel storage modes operate in the same way as they do for  {@link gl:texImage1D/8} . In
-%% the following description, denote by  b s,  b w,  b h, and  b d, the values of pixel storage
-%% modes `?GL_UNPACK_COMPRESSED_BLOCK_SIZE', `?GL_UNPACK_COMPRESSED_BLOCK_WIDTH', `?GL_UNPACK_COMPRESSED_BLOCK_HEIGHT'
-%% , and `?GL_UNPACK_COMPRESSED_BLOCK_DEPTH', respectively.  b s is the compressed block
-%% size in bytes;  b w,  b h, and  b d are the compressed block width, height, and depth
-%% in pixels. 
-%%
-%%  By default the pixel storage modes `?GL_UNPACK_ROW_LENGTH', `?GL_UNPACK_SKIP_ROWS'
-%% , `?GL_UNPACK_SKIP_PIXELS', `?GL_UNPACK_IMAGE_HEIGHT' and `?GL_UNPACK_SKIP_IMAGES'
-%%  are ignored for compressed images. To enable `?GL_UNPACK_SKIP_PIXELS' and `?GL_UNPACK_ROW_LENGTH'
-%% ,  b s and  b w must both be non-zero. To also enable `?GL_UNPACK_SKIP_ROWS' and `?GL_UNPACK_IMAGE_HEIGHT'
-%% ,  b h must be non-zero. To also enable `?GL_UNPACK_SKIP_IMAGES',  b d must be non-zero.
-%% All parameters must be consistent with the compressed format to produce the desired results.
-%% 
-%%
-%%  When selecting a sub-rectangle from a compressed image: the value of `?GL_UNPACK_SKIP_PIXELS'
-%%  must be a multiple of  b w;the value of `?GL_UNPACK_SKIP_ROWS' must be a multiple
-%% of  b w;the value of `?GL_UNPACK_SKIP_IMAGES' must be a multiple of  b w.
-%%
-%%  `ImageSize'  must be equal to: 
-%%
-%%  b s×|width b/w|×|height b/h|×|depth b/d|
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompressedTexImage3D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompressedTexImage3D.xhtml">external</a> documentation.
 -spec compressedTexImage3D(Target, Level, Internalformat, Width, Height, Depth, Border, ImageSize, Data) -> 'ok' when Target :: enum(),Level :: integer(),Internalformat :: enum(),Width :: integer(),Height :: integer(),Depth :: integer(),Border :: integer(),ImageSize :: integer(),Data :: offset()|mem().
 compressedTexImage3D(Target,Level,Internalformat,Width,Height,Depth,Border,ImageSize,Data) when  is_integer(Data) ->
   cast(5360, <<Target:?GLenum,Level:?GLint,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei,Depth:?GLsizei,Border:?GLint,ImageSize:?GLsizei,Data:?GLuint>>);
@@ -9090,57 +3554,7 @@ compressedTexImage3D(Target,Level,Internalformat,Width,Height,Depth,Border,Image
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%% ``gl:compressedTexImage2D'' loads a previously defined, and retrieved, compressed two-dimensional
-%% texture image if  `Target'  is `?GL_TEXTURE_2D', or one of the cube map faces
-%% such as `?GL_TEXTURE_CUBE_MAP_POSITIVE_X'. (see  {@link gl:texImage2D/9} ). 
-%%
-%%  If  `Target'  is `?GL_TEXTURE_1D_ARRAY',  `Data'  is treated as an array of
-%% compressed 1D textures. 
-%%
-%%  If  `Target'  is `?GL_PROXY_TEXTURE_2D', `?GL_PROXY_TEXTURE_1D_ARRAY' or `?GL_PROXY_CUBE_MAP'
-%% , no data is read from  `Data' , but all of the texture image state is recalculated,
-%% checked for consistency, and checked against the implementation's capabilities. If the
-%% implementation cannot handle a texture of the requested texture size, it sets all of the
-%% image state to 0, but does not generate an error (see  {@link gl:getError/0} ). To query
-%% for an entire mipmap array, use an image array level greater than or equal to 1. 
-%%
-%%  `Internalformat'  must be a known compressed image format (such as `?GL_RGTC')
-%% or an extension-specified compressed-texture format. When a texture is loaded with  {@link gl:texImage2D/9} 
-%%  using a generic compressed texture format (e.g., `?GL_COMPRESSED_RGB'), the GL selects
-%% from one of its extensions supporting compressed textures. In order to load the compressed
-%% texture image using ``gl:compressedTexImage2D'', query the compressed texture image's
-%% size and format using  {@link gl:getTexLevelParameterfv/3} . 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  If the compressed data are arranged into fixed-size blocks of texels, the pixel storage
-%% modes can be used to select a sub-rectangle from a larger containing rectangle. These
-%% pixel storage modes operate in the same way as they do for  {@link gl:texImage2D/9} . In
-%% the following description, denote by  b s,  b w,  b h, and  b d, the values of pixel storage
-%% modes `?GL_UNPACK_COMPRESSED_BLOCK_SIZE', `?GL_UNPACK_COMPRESSED_BLOCK_WIDTH', `?GL_UNPACK_COMPRESSED_BLOCK_HEIGHT'
-%% , and `?GL_UNPACK_COMPRESSED_BLOCK_DEPTH', respectively.  b s is the compressed block
-%% size in bytes;  b w,  b h, and  b d are the compressed block width, height, and depth
-%% in pixels. 
-%%
-%%  By default the pixel storage modes `?GL_UNPACK_ROW_LENGTH', `?GL_UNPACK_SKIP_ROWS'
-%% , `?GL_UNPACK_SKIP_PIXELS', `?GL_UNPACK_IMAGE_HEIGHT' and `?GL_UNPACK_SKIP_IMAGES'
-%%  are ignored for compressed images. To enable `?GL_UNPACK_SKIP_PIXELS' and `?GL_UNPACK_ROW_LENGTH'
-%% ,  b s and  b w must both be non-zero. To also enable `?GL_UNPACK_SKIP_ROWS' and `?GL_UNPACK_IMAGE_HEIGHT'
-%% ,  b h must be non-zero. To also enable `?GL_UNPACK_SKIP_IMAGES',  b d must be non-zero.
-%% All parameters must be consistent with the compressed format to produce the desired results.
-%% 
-%%
-%%  When selecting a sub-rectangle from a compressed image: the value of `?GL_UNPACK_SKIP_PIXELS'
-%%  must be a multiple of  b w;the value of `?GL_UNPACK_SKIP_ROWS' must be a multiple
-%% of  b w.
-%%
-%%  `ImageSize'  must be equal to: 
-%%
-%%  b s×|width b/w|×|height b/h|
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompressedTexImage2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompressedTexImage2D.xhtml">external</a> documentation.
 -spec compressedTexImage2D(Target, Level, Internalformat, Width, Height, Border, ImageSize, Data) -> 'ok' when Target :: enum(),Level :: integer(),Internalformat :: enum(),Width :: integer(),Height :: integer(),Border :: integer(),ImageSize :: integer(),Data :: offset()|mem().
 compressedTexImage2D(Target,Level,Internalformat,Width,Height,Border,ImageSize,Data) when  is_integer(Data) ->
   cast(5362, <<Target:?GLenum,Level:?GLint,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei,Border:?GLint,ImageSize:?GLsizei,Data:?GLuint>>);
@@ -9152,52 +3566,7 @@ compressedTexImage2D(Target,Level,Internalformat,Width,Height,Border,ImageSize,D
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%% ``gl:compressedTexImage1D'' loads a previously defined, and retrieved, compressed one-dimensional
-%% texture image if  `Target'  is `?GL_TEXTURE_1D' (see  {@link gl:texImage1D/8} ). 
-%%
-%%  If  `Target'  is `?GL_PROXY_TEXTURE_1D', no data is read from  `Data' , but
-%% all of the texture image state is recalculated, checked for consistency, and checked against
-%% the implementation's capabilities. If the implementation cannot handle a texture of the
-%% requested texture size, it sets all of the image state to 0, but does not generate an
-%% error (see  {@link gl:getError/0} ). To query for an entire mipmap array, use an image array
-%% level greater than or equal to 1. 
-%%
-%%  `Internalformat'  must be an extension-specified compressed-texture format. When a
-%% texture is loaded with  {@link gl:texImage1D/8}  using a generic compressed texture format
-%% (e.g., `?GL_COMPRESSED_RGB') the GL selects from one of its extensions supporting
-%% compressed textures. In order to load the compressed texture image using ``gl:compressedTexImage1D''
-%% , query the compressed texture image's size and format using  {@link gl:getTexLevelParameterfv/3} 
-%% . 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  If the compressed data are arranged into fixed-size blocks of texels, the pixel storage
-%% modes can be used to select a sub-rectangle from a larger containing rectangle. These
-%% pixel storage modes operate in the same way as they do for  {@link gl:texImage1D/8} . In
-%% the following description, denote by  b s,  b w,  b h, and  b d, the values of pixel storage
-%% modes `?GL_UNPACK_COMPRESSED_BLOCK_SIZE', `?GL_UNPACK_COMPRESSED_BLOCK_WIDTH', `?GL_UNPACK_COMPRESSED_BLOCK_HEIGHT'
-%% , and `?GL_UNPACK_COMPRESSED_BLOCK_DEPTH', respectively.  b s is the compressed block
-%% size in bytes;  b w,  b h, and  b d are the compressed block width, height, and depth
-%% in pixels. 
-%%
-%%  By default the pixel storage modes `?GL_UNPACK_ROW_LENGTH', `?GL_UNPACK_SKIP_ROWS'
-%% , `?GL_UNPACK_SKIP_PIXELS', `?GL_UNPACK_IMAGE_HEIGHT' and `?GL_UNPACK_SKIP_IMAGES'
-%%  are ignored for compressed images. To enable `?GL_UNPACK_SKIP_PIXELS' and `?GL_UNPACK_ROW_LENGTH'
-%% ,  b s and  b w must both be non-zero. To also enable `?GL_UNPACK_SKIP_ROWS' and `?GL_UNPACK_IMAGE_HEIGHT'
-%% ,  b h must be non-zero. To also enable `?GL_UNPACK_SKIP_IMAGES',  b d must be non-zero.
-%% All parameters must be consistent with the compressed format to produce the desired results.
-%% 
-%%
-%%  When selecting a sub-rectangle from a compressed image: the value of `?GL_UNPACK_SKIP_PIXELS'
-%%  must be a multiple of  b w;
-%%
-%%  `ImageSize'  must be equal to: 
-%%
-%%  b s×|width b/w|
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompressedTexImage1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompressedTexImage1D.xhtml">external</a> documentation.
 -spec compressedTexImage1D(Target, Level, Internalformat, Width, Border, ImageSize, Data) -> 'ok' when Target :: enum(),Level :: integer(),Internalformat :: enum(),Width :: integer(),Border :: integer(),ImageSize :: integer(),Data :: offset()|mem().
 compressedTexImage1D(Target,Level,Internalformat,Width,Border,ImageSize,Data) when  is_integer(Data) ->
   cast(5364, <<Target:?GLenum,Level:?GLint,Internalformat:?GLenum,Width:?GLsizei,Border:?GLint,ImageSize:?GLsizei,Data:?GLuint>>);
@@ -9209,25 +3578,7 @@ compressedTexImage1D(Target,Level,Internalformat,Width,Border,ImageSize,Data) ->
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%% ``gl:compressedTexSubImage3D'' redefines a contiguous subregion of an existing three-dimensional
-%% texture image. The texels referenced by  `Data'  replace the portion of the existing
-%% texture array with x indices  `Xoffset'  and  xoffset+width-1, and the y indices  `Yoffset' 
-%%  and  yoffset+height-1, and the z indices  `Zoffset'  and  zoffset+depth-1, inclusive.
-%% This region may not include any texels outside the range of the texture array as it was
-%% originally specified. It is not an error to specify a subtexture with width of 0, but
-%% such a specification has no effect. 
-%%
-%%  `Internalformat'  must be a known compressed image format (such as `?GL_RGTC')
-%% or an extension-specified compressed-texture format. The  `Format'  of the compressed
-%% texture image is selected by the GL implementation that compressed it (see  {@link gl:texImage3D/10} 
-%% ) and should be queried at the time the texture was compressed with  {@link gl:getTexLevelParameterfv/3} 
-%% . 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompressedTexSubImage3D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompressedTexSubImage3D.xhtml">external</a> documentation.
 -spec compressedTexSubImage3D(Target, Level, Xoffset, Yoffset, Zoffset, Width, Height, Depth, Format, ImageSize, Data) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Yoffset :: integer(),Zoffset :: integer(),Width :: integer(),Height :: integer(),Depth :: integer(),Format :: enum(),ImageSize :: integer(),Data :: offset()|mem().
 compressedTexSubImage3D(Target,Level,Xoffset,Yoffset,Zoffset,Width,Height,Depth,Format,ImageSize,Data) when  is_integer(Data) ->
   cast(5366, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Yoffset:?GLint,Zoffset:?GLint,Width:?GLsizei,Height:?GLsizei,Depth:?GLsizei,Format:?GLenum,ImageSize:?GLsizei,Data:?GLuint>>);
@@ -9239,24 +3590,7 @@ compressedTexSubImage3D(Target,Level,Xoffset,Yoffset,Zoffset,Width,Height,Depth,
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%% ``gl:compressedTexSubImage2D'' redefines a contiguous subregion of an existing two-dimensional
-%% texture image. The texels referenced by  `Data'  replace the portion of the existing
-%% texture array with x indices  `Xoffset'  and   xoffset+width-1, and the y indices  `Yoffset' 
-%%  and   yoffset+height-1, inclusive.  This region may not include any texels outside the
-%% range of the texture array as it was originally specified. It is not an error to specify
-%% a subtexture with width of 0, but such a specification has no effect. 
-%%
-%%  `Internalformat'  must be a known compressed image format (such as `?GL_RGTC')
-%% or an extension-specified compressed-texture format. The  `Format'  of the compressed
-%% texture image is selected by the GL implementation that compressed it (see  {@link gl:texImage2D/9} 
-%% ) and should be queried at the time the texture was compressed with  {@link gl:getTexLevelParameterfv/3} 
-%% . 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompressedTexSubImage2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompressedTexSubImage2D.xhtml">external</a> documentation.
 -spec compressedTexSubImage2D(Target, Level, Xoffset, Yoffset, Width, Height, Format, ImageSize, Data) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Yoffset :: integer(),Width :: integer(),Height :: integer(),Format :: enum(),ImageSize :: integer(),Data :: offset()|mem().
 compressedTexSubImage2D(Target,Level,Xoffset,Yoffset,Width,Height,Format,ImageSize,Data) when  is_integer(Data) ->
   cast(5368, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Yoffset:?GLint,Width:?GLsizei,Height:?GLsizei,Format:?GLenum,ImageSize:?GLsizei,Data:?GLuint>>);
@@ -9268,24 +3602,7 @@ compressedTexSubImage2D(Target,Level,Xoffset,Yoffset,Width,Height,Format,ImageSi
 %%
 %%  Texturing allows elements of an image array to be read by shaders. 
 %%
-%% ``gl:compressedTexSubImage1D'' redefines a contiguous subregion of an existing one-dimensional
-%% texture image. The texels referenced by  `Data'  replace the portion of the existing
-%% texture array with x indices  `Xoffset'  and   xoffset+width-1, inclusive. This region
-%% may not include any texels outside the range of the texture array as it was originally
-%% specified. It is not an error to specify a subtexture with width of 0, but such a specification
-%% has no effect. 
-%%
-%%  `Internalformat'  must be a known compressed image format (such as `?GL_RGTC')
-%% or an extension-specified compressed-texture format. The  `Format'  of the compressed
-%% texture image is selected by the GL implementation that compressed it (see  {@link gl:texImage1D/8} 
-%% ), and should be queried at the time the texture was compressed with  {@link gl:getTexLevelParameterfv/3} 
-%% . 
-%%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is specified,  `Data'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompressedTexSubImage1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompressedTexSubImage1D.xhtml">external</a> documentation.
 -spec compressedTexSubImage1D(Target, Level, Xoffset, Width, Format, ImageSize, Data) -> 'ok' when Target :: enum(),Level :: integer(),Xoffset :: integer(),Width :: integer(),Format :: enum(),ImageSize :: integer(),Data :: offset()|mem().
 compressedTexSubImage1D(Target,Level,Xoffset,Width,Format,ImageSize,Data) when  is_integer(Data) ->
   cast(5370, <<Target:?GLenum,Level:?GLint,Xoffset:?GLint,Width:?GLsizei,Format:?GLenum,ImageSize:?GLsizei,Data:?GLuint>>);
@@ -9302,20 +3619,7 @@ compressedTexSubImage1D(Target,Level,Xoffset,Width,Format,ImageSize,Data) ->
 %% ), or  {@link gl:texImage3D/10}  (`?GL_TEXTURE_3D').  `Lod'  specifies the level-of-detail
 %% number of the desired image. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target
-%%  (see  {@link gl:bindBuffer/2} ) while a texture image is requested,  `Img'  is treated
-%% as a byte offset into the buffer object's data store. 
-%%
-%%  To minimize errors, first verify that the texture is compressed by calling  {@link gl:getTexLevelParameterfv/3} 
-%%  with argument `?GL_TEXTURE_COMPRESSED'. If the texture is compressed, then determine
-%% the amount of memory required to store the compressed texture by calling  {@link gl:getTexLevelParameterfv/3} 
-%%  with argument `?GL_TEXTURE_COMPRESSED_IMAGE_SIZE'. Finally, retrieve the internal
-%% format of the texture by calling  {@link gl:getTexLevelParameterfv/3}  with argument `?GL_TEXTURE_INTERNAL_FORMAT'
-%% . To store the texture for later use, associate the internal format and size with the
-%% retrieved texture image. These data can be used by the respective texture or subtexture
-%% loading routine used for loading  `Target'  textures. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetCompressedTexImage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetCompressedTexImage.xhtml">external</a> documentation.
 -spec getCompressedTexImage(Target, Lod, Img) -> 'ok' when Target :: enum(),Lod :: integer(),Img :: mem().
 getCompressedTexImage(Target,Lod,Img) ->
   send_bin(Img),
@@ -9328,7 +3632,7 @@ getCompressedTexImage(Target,Lod,Img) ->
 %% or  {@link gl:enableClientState/1} , respectively, when called with a parameter of `?GL_TEXTURE_COORD_ARRAY'
 %% . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClientActiveTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glClientActiveTexture.xml">external</a> documentation.
 -spec clientActiveTexture(Texture) -> 'ok' when Texture :: enum().
 clientActiveTexture(Texture) ->
   cast(5373, <<Texture:?GLenum>>).
@@ -9341,12 +3645,7 @@ clientActiveTexture(Texture) ->
 %%  t r 1),
 %% and ``gl:multiTexCoord4'' defines all four components explicitly as (s t r q). 
 %%
-%%  The current texture coordinates are part of the data that is associated with each vertex
-%% and with the current raster position. Initially, the values for (s t r q) are  (0 0 0 1). 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMultiTexCoord.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMultiTexCoord.xml">external</a> documentation.
 -spec multiTexCoord1d(Target, S) -> 'ok' when Target :: enum(),S :: float().
 multiTexCoord1d(Target,S) ->
   cast(5374, <<Target:?GLenum,0:32,S:?GLdouble>>).
@@ -9511,19 +3810,7 @@ multiTexCoord4sv(Target,{S,T,R,Q}) ->  multiTexCoord4s(Target,S,T,R,Q).
 %% specified by  `M' . The current matrix is the projection matrix, modelview matrix,
 %% or texture matrix, depending on the current matrix mode (see  {@link gl:matrixMode/1} ). 
 %%
-%%  The current matrix, M, defines a transformation of coordinates. For instance, assume
-%% M refers to the modelview matrix. If   v=(v[0] v[1] v[2] v[3]) is the set of object coordinates of a vertex,
-%% and  `M'  points to an array of   16 single- or double-precision floating-point values
-%%   m={m[0] m[1] ... m[15]}, then the modelview transformation   M(v) does the following: 
-%%
-%%  M(v)=(m[0] m[1] m[2] m[3] m[4] m[5] m[6] m[7] m[8] m[9] m[10] m[11] m[12] m[13] m[14] m[15])×(v[0] v[1] v[2] v[3])
-%%
-%%  Projection and texture transformations are similarly defined. 
-%%
-%%  Calling ``gl:loadTransposeMatrix'' with matrix   M is identical in operation to  {@link gl:loadMatrixd/1} 
-%%  with   M T, where   T represents the transpose. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLoadTransposeMatrix.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLoadTransposeMatrix.xml">external</a> documentation.
 -spec loadTransposeMatrixf(M) -> 'ok' when M :: matrix().
 loadTransposeMatrixf({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5390, <<M1:?GLfloat,M2:?GLfloat,M3:?GLfloat,M4:?GLfloat,M5:?GLfloat,M6:?GLfloat,M7:?GLfloat,M8:?GLfloat,M9:?GLfloat,M10:?GLfloat,M11:?GLfloat,M12:?GLfloat,M13:?GLfloat,M14:?GLfloat,M15:?GLfloat,M16:?GLfloat>>);
@@ -9543,10 +3830,7 @@ loadTransposeMatrixd({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 %% ``gl:multTransposeMatrix'' multiplies the current matrix with the one specified using  `M' 
 %% , and replaces the current matrix with the product. 
 %%
-%%  The current matrix is determined by the current matrix mode (see  {@link gl:matrixMode/1} ).
-%% It is either the projection matrix, modelview matrix, or the texture matrix. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMultTransposeMatrix.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glMultTransposeMatrix.xml">external</a> documentation.
 -spec multTransposeMatrixf(M) -> 'ok' when M :: matrix().
 multTransposeMatrixf({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5392, <<M1:?GLfloat,M2:?GLfloat,M3:?GLfloat,M4:?GLfloat,M5:?GLfloat,M6:?GLfloat,M7:?GLfloat,M8:?GLfloat,M9:?GLfloat,M10:?GLfloat,M11:?GLfloat,M12:?GLfloat,M13:?GLfloat,M14:?GLfloat,M15:?GLfloat,M16:?GLfloat>>);
@@ -9568,72 +3852,7 @@ multTransposeMatrixd({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 %% is initially disabled. Use  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_BLEND'
 %%  to enable and disable blending. 
 %%
-%% ``gl:blendFuncSeparate'' defines the operation of blending for all draw buffers when
-%% it is enabled. ``gl:blendFuncSeparatei'' defines the operation of blending for a single
-%% draw buffer specified by  `Buf'  when enabled for that draw buffer.  `SrcRGB'  specifies
-%% which method is used to scale the source RGB-color components.  `DstRGB'  specifies
-%% which method is used to scale the destination RGB-color components. Likewise,  `SrcAlpha' 
-%%  specifies which method is used to scale the source alpha color component, and  `DstAlpha' 
-%%  specifies which method is used to scale the destination alpha component. The possible
-%% methods are described in the following table. Each method defines four scale factors,
-%% one each for red, green, blue, and alpha. 
-%%
-%%  In the table and in subsequent equations, first source, second source and destination
-%% color components are referred to as (R s0 G s0 B s0 A s0), (R s1 G s1 B s1 A s1), and (R d G d B d A d), respectively. The color specified by  {@link gl:blendColor/4} 
-%%  is referred to as (R c G c B c A c). They are understood to have integer values between 0 and (k R k G k B
-%% k A), where 
-%%
-%%  k c=2(m c)-1
-%%
-%%  and (m R m G m B m A) is the number of red, green, blue, and alpha bitplanes. 
-%%
-%%  Source and destination scale factors are referred to as (s R s G s B s A) and (d R d G d B d A). All scale factors have
-%% range  [0 1]. 
-%%
-%% <table><tbody><tr><td>` Parameter '</td><td>` RGB Factor '</td><td>` Alpha Factor '
-%% </td></tr></tbody><tbody><tr><td>`?GL_ZERO'</td><td>(0 0 0)</td><td> 0</td></tr><tr><td>`?GL_ONE'
-%% </td><td>(1 1 1)</td><td> 1</td></tr><tr><td>`?GL_SRC_COLOR'</td><td>(R s0 k/R G s0 k/G B s0
-%% k/B)</td><td> A s0 k/A</td>
-%% </tr><tr><td>`?GL_ONE_MINUS_SRC_COLOR'</td><td>(1 1 1 1)-(R s0 k/R G s0 k/G B s0 k/B)</td><td> 1-A s0 k/A</td></tr><tr><td>
-%% `?GL_DST_COLOR'</td><td>(R d k/R G d k/G B d k/B)</td><td> A d k/A</td></tr><tr><td>`?GL_ONE_MINUS_DST_COLOR'
-%% </td><td>(1 1 1)-(R d k/R G d k/G B d k/B)</td><td> 1-A d k/A</td></tr><tr><td>`?GL_SRC_ALPHA'</td><td>(A s0 k/A A s0
-%% k/A A s0 k/A)</td><td> A
-%% s0 k/A</td></tr><tr><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td>(1 1 1)-(A s0 k/A A s0 k/A A s0 k/A
-%% )</td><td> 1-A s0 k/A</td></tr>
-%% <tr><td>`?GL_DST_ALPHA'</td><td>(A d k/A A d k/A A d k/A)</td><td> A d k/A</td></tr><tr><td>`?GL_ONE_MINUS_DST_ALPHA'
-%% </td><td>(1 1 1)-(A d k/A A d k/A A d k/A)</td><td> 1-A d k/A</td></tr><tr><td>`?GL_CONSTANT_COLOR'</td><td>(R c G c
-%% B c)</td><td>
-%%  A c</td></tr><tr><td>`?GL_ONE_MINUS_CONSTANT_COLOR'</td><td>(1 1 1)-(R c G c B c)</td><td> 1-A c</td></tr>
-%% <tr><td>`?GL_CONSTANT_ALPHA'</td><td>(A c A c A c)</td><td> A c</td></tr><tr><td>`?GL_ONE_MINUS_CONSTANT_ALPHA'
-%% </td><td>(1 1 1)-(A c A c A c)</td><td> 1-A c</td></tr><tr><td>`?GL_SRC_ALPHA_SATURATE'</td><td>(i i i)</td><td>
-%%  1</td></tr><tr><td>`?GL_SRC1_COLOR'</td><td>(R s1 k/R G s1 k/G B s1 k/B)</td><td> A s1 k/A</td></tr><tr><td>`?GL_ONE_MINUS_SRC_COLOR'
-%% </td><td>(1 1 1 1)-(R s1 k/R G s1 k/G B s1 k/B)</td><td> 1-A s1 k/A</td></tr><tr><td>`?GL_SRC1_ALPHA'</td><td>(A s1 k/A A
-%% s1 k/A A s1 k/A)</td><td> A
-%% s1 k/A</td></tr><tr><td>`?GL_ONE_MINUS_SRC_ALPHA'</td><td>(1 1 1)-(A s1 k/A A s1 k/A A s1 k/A
-%% )</td><td> 1-A s1 k/A</td></tr>
-%% </tbody></table>
-%%
-%%  In the table, 
-%%
-%%  i=min(A s 1-(A d))
-%%
-%%  To determine the blended RGBA values of a pixel, the system uses the following equations:
-%% 
-%%
-%%  R d=min(k R R s  s R+R d  d R) G d=min(k G G s  s G+G d  d G) B d=min(k B B s  s B+B d  d B) A d=min(k A A s  s A+A d  d A)
-%%
-%%  Despite the apparent precision of the above equations, blending arithmetic is not exactly
-%% specified, because blending operates with imprecise integer color values. However, a blend
-%% factor that should be equal to 1 is guaranteed not to modify its multiplicand, and a blend
-%% factor equal to 0 reduces its multiplicand to 0. For example, when  `SrcRGB'  is `?GL_SRC_ALPHA'
-%% ,  `DstRGB'  is `?GL_ONE_MINUS_SRC_ALPHA', and   A s is equal to   k A, the equations
-%% reduce to simple replacement: 
-%%
-%%  R d=R s G d=G s B d=B s A d=A s
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlendFuncSeparate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBlendFuncSeparate.xhtml">external</a> documentation.
 -spec blendFuncSeparate(SfactorRGB, DfactorRGB, SfactorAlpha, DfactorAlpha) -> 'ok' when SfactorRGB :: enum(),DfactorRGB :: enum(),SfactorAlpha :: enum(),DfactorAlpha :: enum().
 blendFuncSeparate(SfactorRGB,DfactorRGB,SfactorAlpha,DfactorAlpha) ->
   cast(5394, <<SfactorRGB:?GLenum,DfactorRGB:?GLenum,SfactorAlpha:?GLenum,DfactorAlpha:?GLenum>>).
@@ -9646,19 +3865,7 @@ blendFuncSeparate(SfactorRGB,DfactorRGB,SfactorAlpha,DfactorAlpha) ->
 %% normals, and colors and use them to construct a sequence of primitives with a single call
 %% to ``gl:multiDrawArrays''. 
 %%
-%% ``gl:multiDrawArrays'' behaves identically to  {@link gl:drawArrays/3}  except that  `Primcount' 
-%%  separate ranges of elements are specified instead. 
-%%
-%%  When ``gl:multiDrawArrays'' is called, it uses  `Count'  sequential elements from
-%% each enabled array to construct a sequence of geometric primitives, beginning with element
-%%  `First' .  `Mode'  specifies what kind of primitives are constructed, and how the
-%% array elements construct those primitives. 
-%%
-%%  Vertex attributes that are modified by ``gl:multiDrawArrays'' have an unspecified value
-%% after ``gl:multiDrawArrays'' returns. Attributes that aren't modified remain well defined.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMultiDrawArrays.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glMultiDrawArrays.xhtml">external</a> documentation.
 -spec multiDrawArrays(Mode, First, Count) -> 'ok' when Mode :: enum(),First :: [integer()]|mem(),Count :: [integer()]|mem().
 multiDrawArrays(Mode,First,Count) when  is_list(First), is_list(Count) ->
   FirstLen = length(First),
@@ -9677,15 +3884,7 @@ multiDrawArrays(Mode,First,Count) ->
 %%
 %%  The following values are accepted for  `Pname' : 
 %%
-%% `?GL_POINT_FADE_THRESHOLD_SIZE':  `Params'  is a single floating-point value that
-%% specifies the threshold value to which point sizes are clamped if they exceed the specified
-%% value. The default value is 1.0. 
-%%
-%% `?GL_POINT_SPRITE_COORD_ORIGIN':  `Params'  is a single enum specifying the point
-%% sprite texture coordinate origin, either `?GL_LOWER_LEFT' or `?GL_UPPER_LEFT'.
-%%  The default value is `?GL_UPPER_LEFT'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPointParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPointParameter.xhtml">external</a> documentation.
 -spec pointParameterf(Pname, Param) -> 'ok' when Pname :: enum(),Param :: float().
 pointParameterf(Pname,Param) ->
   cast(5397, <<Pname:?GLenum,Param:?GLfloat>>).
@@ -9716,7 +3915,7 @@ pointParameteriv(Pname,Params) ->
 %% the current raster position. The value specified is interpolated and used in computing
 %% the fog color (see  {@link gl:fogf/2} ). 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFogCoord.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFogCoord.xml">external</a> documentation.
 -spec fogCoordf(Coord) -> 'ok' when Coord :: float().
 fogCoordf(Coord) ->
   cast(5401, <<Coord:?GLfloat>>).
@@ -9742,22 +3941,7 @@ fogCoorddv({Coord}) ->  fogCoordd(Coord).
 %%  specifies the byte stride from one fog coordinate to the next, allowing vertices and
 %% attributes to be packed into a single array or stored in separate arrays. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a fog coordinate array is specified,  `Pointer'  is treated as a byte offset
-%% into the buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as fog coordinate vertex array client-side state (`?GL_FOG_COORD_ARRAY_BUFFER_BINDING'
-%% ). 
-%%
-%%  When a fog coordinate array is specified,  `Type' ,  `Stride' , and  `Pointer' 
-%% are saved as client-side state, in addition to the current vertex array buffer object
-%% binding. 
-%%
-%%  To enable and disable the fog coordinate array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_FOG_COORD_ARRAY'. If enabled, the fog coordinate array is
-%% used when  {@link gl:drawArrays/3} ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} , see `glMultiDrawElements'
-%% ,  {@link gl:drawRangeElements/6} , or  {@link gl:arrayElement/1}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFogCoordPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFogCoordPointer.xml">external</a> documentation.
 -spec fogCoordPointer(Type, Stride, Pointer) -> 'ok' when Type :: enum(),Stride :: integer(),Pointer :: offset()|mem().
 fogCoordPointer(Type,Stride,Pointer) when  is_integer(Pointer) ->
   cast(5403, <<Type:?GLenum,Stride:?GLsizei,Pointer:?GLuint>>);
@@ -9770,31 +3954,7 @@ fogCoordPointer(Type,Stride,Pointer) ->
 %%  The GL stores both a primary four-valued RGBA color and a secondary four-valued RGBA
 %% color (where alpha is always set to 0.0) that is associated with every vertex. 
 %%
-%%  The secondary color is interpolated and applied to each fragment during rasterization
-%% when `?GL_COLOR_SUM' is enabled. When lighting is enabled, and `?GL_SEPARATE_SPECULAR_COLOR'
-%%  is specified, the value of the secondary color is assigned the value computed from the
-%% specular term of the lighting computation. Both the primary and secondary current colors
-%% are applied to each fragment, regardless of the state of `?GL_COLOR_SUM', under such
-%% conditions. When `?GL_SEPARATE_SPECULAR_COLOR' is specified, the value returned from
-%% querying the current secondary color is undefined. 
-%%
-%% ``gl:secondaryColor3b'', ``gl:secondaryColor3s'', and ``gl:secondaryColor3i'' take
-%% three signed byte, short, or long integers as arguments. When `v' is appended to
-%% the name, the color commands can take a pointer to an array of such values. 
-%%
-%%  Color values are stored in floating-point format, with unspecified mantissa and exponent
-%% sizes. Unsigned integer color components, when specified, are linearly mapped to floating-point
-%% values such that the largest representable value maps to 1.0 (full intensity), and 0 maps
-%% to 0.0 (zero intensity). Signed integer color components, when specified, are linearly
-%% mapped to floating-point values such that the most positive representable value maps to
-%% 1.0, and the most negative representable value maps to   -1.0. (Note that this mapping
-%% does not convert 0 precisely to 0.0). Floating-point values are mapped directly. 
-%%
-%%  Neither floating-point nor signed integer values are clamped to the range [0 1] before the
-%% current color is updated. However, color components are clamped to this range before they
-%% are interpolated or written into a color buffer. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSecondaryColor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glSecondaryColor.xml">external</a> documentation.
 -spec secondaryColor3b(Red, Green, Blue) -> 'ok' when Red :: integer(),Green :: integer(),Blue :: integer().
 secondaryColor3b(Red,Green,Blue) ->
   cast(5405, <<Red:?GLbyte,Green:?GLbyte,Blue:?GLbyte>>).
@@ -9881,23 +4041,7 @@ secondaryColor3usv({Red,Green,Blue}) ->  secondaryColor3us(Red,Green,Blue).
 %%  specifies the byte stride from one color to the next, allowing vertices and attributes
 %% to be packed into a single array or stored in separate arrays. 
 %%
-%%  If a non-zero named buffer object is bound to the `?GL_ARRAY_BUFFER' target  (see  {@link gl:bindBuffer/2} 
-%% ) while a secondary color array is specified,  `Pointer'  is treated as a byte offset
-%% into the buffer object's data store. Also, the buffer object binding (`?GL_ARRAY_BUFFER_BINDING'
-%% ) is saved as secondary color vertex array client-side state (`?GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING'
-%% ). 
-%%
-%%  When a secondary color array is specified,  `Size' ,  `Type' ,  `Stride' , and  `Pointer' 
-%%  are saved as client-side state, in addition to the current vertex array buffer object
-%% binding. 
-%%
-%%  To enable and disable the secondary color array, call  {@link gl:enableClientState/1}  and  {@link gl:enableClientState/1} 
-%%  with the argument `?GL_SECONDARY_COLOR_ARRAY'. If enabled, the secondary color array
-%% is used when  {@link gl:arrayElement/1} ,  {@link gl:drawArrays/3} ,  {@link gl:multiDrawArrays/3} ,
-%%  {@link gl:drawElements/4} , see `glMultiDrawElements', or  {@link gl:drawRangeElements/6} 
-%% is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSecondaryColorPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glSecondaryColorPointer.xml">external</a> documentation.
 -spec secondaryColorPointer(Size, Type, Stride, Pointer) -> 'ok' when Size :: integer(),Type :: enum(),Stride :: integer(),Pointer :: offset()|mem().
 secondaryColorPointer(Size,Type,Stride,Pointer) when  is_integer(Pointer) ->
   cast(5413, <<Size:?GLint,Type:?GLenum,Stride:?GLsizei,Pointer:?GLuint>>);
@@ -9912,38 +4056,7 @@ secondaryColorPointer(Size,Type,Stride,Pointer) ->
 %% subpixel accuracy. See  {@link gl:bitmap/7} ,  {@link gl:drawPixels/5} , and  {@link gl:copyPixels/5} 
 %% . 
 %%
-%% ``gl:windowPos2'' specifies the   x and   y coordinates, while   z is implicitly set
-%% to 0. ``gl:windowPos3'' specifies all three coordinates. The   w coordinate of the current
-%% raster position is always set to 1.0. 
-%%
-%% ``gl:windowPos'' directly updates the   x and   y coordinates of the current raster
-%% position with the values specified. That is, the values are neither transformed by the
-%% current modelview and projection matrices, nor by the viewport-to-window transform. The  
-%% z coordinate of the current raster position is updated in the following manner: 
-%%
-%%  z={n f(n+z×(f-n))  if  z&lt;= 0 if  z&gt;= 1(otherwise))
-%%
-%%  where   n is `?GL_DEPTH_RANGE''s near value, and   f is `?GL_DEPTH_RANGE''s
-%% far value. See  {@link gl:depthRange/2} . 
-%%
-%%  The specified coordinates are not clip-tested, causing the raster position to always
-%% be valid. 
-%%
-%%  The current raster position also includes some associated color data and texture coordinates.
-%% If lighting is enabled, then `?GL_CURRENT_RASTER_COLOR' (in RGBA mode) or `?GL_CURRENT_RASTER_INDEX'
-%%  (in color index mode) is set to the color produced by the lighting calculation (see  {@link gl:lightf/3} 
-%% ,  {@link gl:lightModelf/2} , and  {@link gl:shadeModel/1} ). If lighting is disabled, current
-%% color (in RGBA mode, state variable `?GL_CURRENT_COLOR') or color index (in color
-%% index mode, state variable `?GL_CURRENT_INDEX') is used to update the current raster
-%% color. `?GL_CURRENT_RASTER_SECONDARY_COLOR' (in RGBA mode) is likewise updated. 
-%%
-%%  Likewise, `?GL_CURRENT_RASTER_TEXTURE_COORDS' is updated as a function of `?GL_CURRENT_TEXTURE_COORDS'
-%% , based on the texture matrix and the texture generation functions (see  {@link gl:texGend/3} ).
-%% The `?GL_CURRENT_RASTER_DISTANCE' is set to the `?GL_CURRENT_FOG_COORD'. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWindowPos.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glWindowPos.xml">external</a> documentation.
 -spec windowPos2d(X, Y) -> 'ok' when X :: float(),Y :: float().
 windowPos2d(X,Y) ->
   cast(5415, <<X:?GLdouble,Y:?GLdouble>>).
@@ -10028,13 +4141,7 @@ windowPos3sv({X,Y,Z}) ->  windowPos3s(X,Y,Z).
 %% that the names form a contiguous set of integers; however, it is guaranteed that none
 %% of the returned names was in use immediately before the call to ``gl:genQueries''. 
 %%
-%%  Query object names returned by a call to ``gl:genQueries'' are not returned by subsequent
-%% calls, unless they are first deleted with  {@link gl:deleteQueries/1} .  
-%%
-%%  No query objects are associated with the returned query object names until they are first
-%% used by calling  {@link gl:beginQuery/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenQueries.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenQueries.xhtml">external</a> documentation.
 -spec genQueries(N) -> [integer()] when N :: integer().
 genQueries(N) ->
   call(5423, <<N:?GLsizei>>).
@@ -10045,10 +4152,7 @@ genQueries(N) ->
 %% . After a query object is deleted, it has no contents, and its name is free for reuse
 %% (for example by  {@link gl:genQueries/1} ). 
 %%
-%% ``gl:deleteQueries'' silently ignores 0's and names that do not correspond to existing
-%% query objects. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteQueries.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteQueries.xhtml">external</a> documentation.
 -spec deleteQueries(Ids) -> 'ok' when Ids :: [integer()].
 deleteQueries(Ids) ->
   IdsLen = length(Ids),
@@ -10061,10 +4165,7 @@ deleteQueries(Ids) ->
 %% object. If  `Id'  is zero, or is a non-zero value that is not currently the name of
 %% a query object, or if an error occurs, ``gl:isQuery'' returns `?GL_FALSE'. 
 %%
-%%  A name returned by  {@link gl:genQueries/1} , but not yet associated with a query object
-%% by calling  {@link gl:beginQuery/2} , is not the name of a query object. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsQuery.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsQuery.xhtml">external</a> documentation.
 -spec isQuery(Id) -> 0|1 when Id :: integer().
 isQuery(Id) ->
   call(5425, <<Id:?GLuint>>).
@@ -10078,60 +4179,7 @@ isQuery(Id) ->
 %% , `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN', or `?GL_TIME_ELAPSED'. The behavior
 %% of the query object depends on its type and is as follows. 
 %%
-%%  If  `Target'  is `?GL_SAMPLES_PASSED',  `Id'  must be an unused name, or the
-%% name of an existing occlusion query object. When ``gl:beginQuery'' is executed, the
-%% query object's samples-passed counter is reset to 0. Subsequent rendering will increment
-%% the counter for every sample that passes the depth test. If the value of `?GL_SAMPLE_BUFFERS'
-%%  is 0, then the samples-passed count is incremented by 1 for each fragment. If the value
-%% of `?GL_SAMPLE_BUFFERS' is 1, then the samples-passed count is incremented by the
-%% number of samples whose coverage bit is set. However, implementations, at their discression
-%% may instead increase the samples-passed count by the value of `?GL_SAMPLES' if any
-%% sample in the fragment is covered. When ``gl:endQuery'' is executed, the samples-passed
-%% counter is assigned to the query object's result value. This value can be queried by calling
-%%  {@link gl:getQueryObjectiv/2}  with  `Pname' `?GL_QUERY_RESULT'. 
-%%
-%%  If  `Target'  is `?GL_ANY_SAMPLES_PASSED',  `Id'  must be an unused name,
-%% or the name of an existing boolean occlusion query object. When ``gl:beginQuery'' is
-%% executed, the query object's samples-passed flag is reset to `?GL_FALSE'. Subsequent
-%% rendering causes the flag to be set to `?GL_TRUE' if any sample passes the depth
-%% test. When ``gl:endQuery'' is executed, the samples-passed flag is assigned to the query
-%% object's result value. This value can be queried by calling  {@link gl:getQueryObjectiv/2} 
-%% with  `Pname' `?GL_QUERY_RESULT'. 
-%%
-%%  If  `Target'  is `?GL_PRIMITIVES_GENERATED',  `Id'  must be an unused name,
-%% or the name of an existing primitive query object previously bound to the `?GL_PRIMITIVES_GENERATED'
-%%  query binding. When ``gl:beginQuery'' is executed, the query object's primitives-generated
-%% counter is reset to 0. Subsequent rendering will increment the counter once for every
-%% vertex that is emitted from the geometry shader, or from the vertex shader if no geometry
-%% shader is present. When ``gl:endQuery'' is executed, the primitives-generated counter
-%% is assigned to the query object's result value. This value can be queried by calling  {@link gl:getQueryObjectiv/2} 
-%%  with  `Pname' `?GL_QUERY_RESULT'. 
-%%
-%%  If  `Target'  is `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN',  `Id'  must
-%% be an unused name, or the name of an existing primitive query object previously bound
-%% to the `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN' query binding. When ``gl:beginQuery''
-%%  is executed, the query object's primitives-written counter is reset to 0. Subsequent
-%% rendering will increment the counter once for every vertex that is written into the bound
-%% transform feedback buffer(s). If transform feedback mode is not activated between the
-%% call to ``gl:beginQuery'' and ``gl:endQuery'', the counter will not be incremented.
-%% When ``gl:endQuery'' is executed, the primitives-written counter is assigned to the
-%% query object's result value. This value can be queried by calling  {@link gl:getQueryObjectiv/2} 
-%%  with  `Pname' `?GL_QUERY_RESULT'. 
-%%
-%%  If  `Target'  is `?GL_TIME_ELAPSED',  `Id'  must be an unused name, or the
-%% name of an existing timer query object previously bound to the `?GL_TIME_ELAPSED'
-%% query binding. When ``gl:beginQuery'' is executed, the query object's time counter is
-%% reset to 0. When ``gl:endQuery'' is executed, the elapsed server time that has passed
-%% since the call to ``gl:beginQuery'' is written into the query object's time counter.
-%% This value can be queried by calling  {@link gl:getQueryObjectiv/2}  with  `Pname' `?GL_QUERY_RESULT'
-%% . 
-%%
-%%  Querying the `?GL_QUERY_RESULT' implicitly flushes the GL pipeline until the rendering
-%% delimited by the query object has completed and the result is available. `?GL_QUERY_RESULT_AVAILABLE'
-%%  can be queried to determine if the result is immediately available or if the rendering
-%% is not yet complete. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBeginQuery.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBeginQuery.xhtml">external</a> documentation.
 -spec beginQuery(Target, Id) -> 'ok' when Target :: enum(),Id :: integer().
 beginQuery(Target,Id) ->
   cast(5426, <<Target:?GLenum,Id:?GLuint>>).
@@ -10144,7 +4192,7 @@ endQuery(Target) ->
 
 %% @doc glGetQuery
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetQuery.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getQueryiv(Target, Pname) -> integer() when Target :: enum(),Pname :: enum().
 getQueryiv(Target,Pname) ->
   call(5428, <<Target:?GLenum,Pname:?GLenum>>).
@@ -10154,17 +4202,7 @@ getQueryiv(Target,Pname) ->
 %% ``gl:getQueryObject'' returns in  `Params'  a selected parameter of the query object
 %% specified by  `Id' . 
 %%
-%%  `Pname'  names a specific query object parameter.  `Pname'  can be as follows: 
-%%
-%% `?GL_QUERY_RESULT':  `Params'  returns the value of the query object's passed
-%% samples counter.  The initial value is 0. 
-%%
-%% `?GL_QUERY_RESULT_AVAILABLE':  `Params'  returns whether the passed samples counter
-%% is immediately available. If a delay would occur waiting for the query result, `?GL_FALSE'
-%%  is returned.  Otherwise, `?GL_TRUE' is returned, which also indicates that the results
-%% of all previous queries are available as well. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetQueryObject.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetQueryObject.xhtml">external</a> documentation.
 -spec getQueryObjectiv(Id, Pname) -> integer() when Id :: integer(),Pname :: enum().
 getQueryObjectiv(Id,Pname) ->
   call(5429, <<Id:?GLuint,Pname:?GLenum>>).
@@ -10183,77 +4221,7 @@ getQueryObjectuiv(Id,Pname) ->
 %% object with name  `Buffer'  exists, one is created with that name. When a buffer object
 %% is bound to a target, the previous binding for that target is automatically broken. 
 %%
-%%  Buffer object names are unsigned integers. The value zero is reserved, but there is no
-%% default buffer object for each buffer object target. Instead,  `Buffer'  set to zero
-%% effectively unbinds any buffer object previously bound, and restores client memory usage
-%% for that buffer object target (if supported for that target). Buffer object names and
-%% the corresponding buffer object contents are local to the shared object space of the current
-%% GL rendering context; two rendering contexts share buffer object names only if they explicitly
-%% enable sharing between contexts through the appropriate GL windows interfaces functions. 
-%%
-%%  {@link gl:genBuffers/1}  must be used to generate a set of unused buffer object names. 
-%%
-%%  The state of a buffer object immediately after it is first bound is an unmapped zero-sized
-%% memory buffer with `?GL_READ_WRITE' access and `?GL_STATIC_DRAW' usage. 
-%%
-%%  While a non-zero buffer object name is bound, GL operations on the target to which it
-%% is bound affect the bound buffer object, and queries of the target to which it is bound
-%% return state  from the bound buffer object. While buffer object name zero is bound, as
-%% in the initial state, attempts to modify or query state on the target to which it is bound
-%% generates an  `?GL_INVALID_OPERATION' error. 
-%%
-%%  When a non-zero buffer object is bound to the `?GL_ARRAY_BUFFER' target,  the vertex
-%% array pointer parameter is interpreted as an offset within the buffer object measured
-%% in basic machine units. 
-%%
-%%  When a non-zero buffer object is bound to the `?GL_DRAW_INDIRECT_BUFFER' target,
-%% parameters for draws issued through  {@link gl:drawArraysIndirect/2}  and  {@link gl:drawElementsIndirect/3} 
-%%  are sourced from that buffer object. 
-%%
-%%  While a non-zero buffer object is bound to the `?GL_ELEMENT_ARRAY_BUFFER' target,
-%%  the indices parameter of  {@link gl:drawElements/4} ,   {@link gl:drawElementsInstanced/5} ,  {@link gl:drawElementsBaseVertex/5} 
-%% ,   {@link gl:drawRangeElements/6} ,   {@link gl:drawRangeElementsBaseVertex/7} , see `glMultiDrawElements'
-%% , or  see `glMultiDrawElementsBaseVertex' is interpreted as an  offset within the
-%% buffer object measured in basic machine units. 
-%%
-%%  While a non-zero buffer object is bound to the `?GL_PIXEL_PACK_BUFFER' target, 
-%% the following commands are affected:  {@link gl:getCompressedTexImage/3} ,   {@link gl:getTexImage/5} 
-%% , and   {@link gl:readPixels/7} . The pointer parameter is interpreted as an offset within
-%% the buffer object measured in basic machine units. 
-%%
-%%  While a non-zero buffer object is bound to the `?GL_PIXEL_UNPACK_BUFFER' target,
-%%  the following commands are affected:   {@link gl:compressedTexImage1D/7} ,  {@link gl:compressedTexImage2D/8} 
-%% ,  {@link gl:compressedTexImage3D/9} ,  {@link gl:compressedTexSubImage1D/7} ,  {@link gl:compressedTexSubImage2D/9} 
-%% ,  {@link gl:compressedTexSubImage3D/11} ,  {@link gl:texImage1D/8} ,  {@link gl:texImage2D/9} ,  {@link gl:texImage3D/10} 
-%% ,  {@link gl:texSubImage1D/7} ,  {@link gl:texSubImage1D/7} , and   {@link gl:texSubImage1D/7} .
-%% The pointer parameter is  interpreted as an offset within the buffer object measured in
-%% basic machine units. 
-%%
-%%  The buffer targets `?GL_COPY_READ_BUFFER' and `?GL_COPY_WRITE_BUFFER' are provided
-%% to allow  {@link gl:copyBufferSubData/5}  to be used without disturbing the state of other
-%% bindings. However,  {@link gl:copyBufferSubData/5}  may be used with any pair of buffer binding
-%% points. 
-%%
-%%  The `?GL_TRANSFORM_FEEDBACK_BUFFER' buffer binding point may be passed to ``gl:bindBuffer''
-%% , but will not directly affect transform feedback state. Instead, the indexed `?GL_TRANSFORM_FEEDBACK_BUFFER'
-%%  bindings must be used through a call to  {@link gl:bindBufferBase/3}  or  {@link gl:bindBufferRange/5} 
-%% . This will affect the generic `?GL_TRANSFORM_FEEDABCK_BUFFER' binding. 
-%%
-%%  Likewise, the `?GL_UNIFORM_BUFFER' and `?GL_ATOMIC_COUNTER_BUFFER' buffer binding
-%% points may be used, but do not directly affect uniform buffer or atomic counter buffer
-%% state, respectively.  {@link gl:bindBufferBase/3}  or  {@link gl:bindBufferRange/5}  must be
-%% used to bind a buffer to an indexed uniform buffer or atomic counter buffer binding point.
-%% 
-%%
-%%  A buffer object binding created with ``gl:bindBuffer'' remains active until a different
-%% buffer object name is bound to the same target, or until the bound buffer object is deleted
-%% with  {@link gl:deleteBuffers/1} . 
-%%
-%%  Once created, a named buffer object may be re-bound to any target as often as needed.
-%% However, the GL implementation may make choices about how to optimize the storage of a
-%% buffer object based on its initial binding target. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindBuffer.xhtml">external</a> documentation.
 -spec bindBuffer(Target, Buffer) -> 'ok' when Target :: enum(),Buffer :: integer().
 bindBuffer(Target,Buffer) ->
   cast(5431, <<Target:?GLenum,Buffer:?GLuint>>).
@@ -10265,10 +4233,7 @@ bindBuffer(Target,Buffer) ->
 %% free for reuse (for example by  {@link gl:genBuffers/1} ). If a buffer object that is currently
 %% bound is deleted, the binding reverts to 0 (the absence of any buffer object). 
 %%
-%% ``gl:deleteBuffers'' silently ignores 0's and names that do not correspond to existing
-%% buffer objects. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteBuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteBuffers.xhtml">external</a> documentation.
 -spec deleteBuffers(Buffers) -> 'ok' when Buffers :: [integer()].
 deleteBuffers(Buffers) ->
   BuffersLen = length(Buffers),
@@ -10282,13 +4247,7 @@ deleteBuffers(Buffers) ->
 %% that none of the returned names was in use immediately before the call to ``gl:genBuffers''
 %% . 
 %%
-%%  Buffer object names returned by a call to ``gl:genBuffers'' are not returned by subsequent
-%% calls, unless they are first deleted with  {@link gl:deleteBuffers/1} . 
-%%
-%%  No buffer objects are associated with the returned buffer object names until they are
-%% first bound by calling  {@link gl:bindBuffer/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenBuffers.xhtml">external</a> documentation.
 -spec genBuffers(N) -> [integer()] when N :: integer().
 genBuffers(N) ->
   call(5433, <<N:?GLsizei>>).
@@ -10300,10 +4259,7 @@ genBuffers(N) ->
 %% the name of a buffer object, or if an error occurs, ``gl:isBuffer'' returns `?GL_FALSE'
 %% . 
 %%
-%%  A name returned by  {@link gl:genBuffers/1} , but not yet associated with a buffer object
-%% by calling  {@link gl:bindBuffer/2} , is not the name of a buffer object. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsBuffer.xhtml">external</a> documentation.
 -spec isBuffer(Buffer) -> 0|1 when Buffer :: integer().
 isBuffer(Buffer) ->
   call(5434, <<Buffer:?GLuint>>).
@@ -10317,31 +4273,7 @@ isBuffer(Buffer) ->
 %% is not mapped, it has a `?NULL' mapped pointer, and its mapped access  is `?GL_READ_WRITE'
 %% . 
 %%
-%%  `Usage'  is a hint to the GL implementation as to how a buffer object's data store
-%% will be  accessed. This enables the GL implementation to make more intelligent decisions
-%% that may significantly  impact buffer object performance. It does not, however, constrain
-%% the actual usage of the data store.  `Usage'  can be broken down into two parts: first,
-%% the frequency of access (modification  and usage), and second, the nature of that access.
-%% The frequency of access may be one of these: 
-%%
-%% STREAM:  The data store contents will be modified once and used at most a few times. 
-%%
-%% STATIC:  The data store contents will be modified once and used many times. 
-%%
-%% DYNAMIC:  The data store contents will be modified repeatedly and used many times. 
-%%
-%%  The nature of access may be one of these: 
-%%
-%% DRAW:  The data store contents are modified by the application, and used as the source
-%% for GL drawing and image specification commands. 
-%%
-%% READ:  The data store contents are modified by reading data from the GL, and used to return
-%% that data  when queried by the application. 
-%%
-%% COPY:  The data store contents are modified by reading data from the GL, and used as the
-%% source for GL drawing and image specification commands. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBufferData.xhtml">external</a> documentation.
 -spec bufferData(Target, Size, Data, Usage) -> 'ok' when Target :: enum(),Size :: integer(),Data :: offset()|mem(),Usage :: enum().
 bufferData(Target,Size,Data,Usage) when  is_integer(Data) ->
   cast(5435, <<Target:?GLenum,0:32,Size:?GLsizeiptr,Data:?GLuint,Usage:?GLenum>>);
@@ -10357,7 +4289,7 @@ bufferData(Target,Size,Data,Usage) ->
 %% is thrown if  `Offset'  and  `Size'  together define a range beyond the bounds of
 %% the buffer object's data store. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBufferSubData.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBufferSubData.xhtml">external</a> documentation.
 -spec bufferSubData(Target, Offset, Size, Data) -> 'ok' when Target :: enum(),Offset :: integer(),Size :: integer(),Data :: offset()|mem().
 bufferSubData(Target,Offset,Size,Data) when  is_integer(Data) ->
   cast(5437, <<Target:?GLenum,0:32,Offset:?GLintptr,Size:?GLsizeiptr,Data:?GLuint>>);
@@ -10373,7 +4305,7 @@ bufferSubData(Target,Offset,Size,Data) ->
 %% is thrown if the buffer object is currently mapped, or if  `Offset'  and  `Size' 
 %% together define a range beyond the bounds  of the buffer object's data store. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetBufferSubData.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetBufferSubData.xhtml">external</a> documentation.
 -spec getBufferSubData(Target, Offset, Size, Data) -> 'ok' when Target :: enum(),Offset :: integer(),Size :: integer(),Data :: mem().
 getBufferSubData(Target,Offset,Size,Data) ->
   send_bin(Data),
@@ -10384,21 +4316,7 @@ getBufferSubData(Target,Offset,Size,Data) ->
 %% ``gl:getBufferParameteriv'' returns in  `Data'  a selected parameter of the buffer
 %% object specified by  `Target' . 
 %%
-%%  `Value'  names a specific buffer object parameter, as follows: 
-%%
-%% `?GL_BUFFER_ACCESS':  `Params'  returns the access policy set while mapping the
-%% buffer object.  The initial value is `?GL_READ_WRITE'. 
-%%
-%% `?GL_BUFFER_MAPPED':  `Params'  returns a flag indicating whether the buffer object
-%% is currently  mapped. The initial value is `?GL_FALSE'. 
-%%
-%% `?GL_BUFFER_SIZE':  `Params'  returns the size of the buffer object, measured
-%% in bytes.  The initial value is 0. 
-%%
-%% `?GL_BUFFER_USAGE':  `Params'  returns the buffer object's usage pattern. The
-%% initial value is `?GL_STATIC_DRAW'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetBufferParameteriv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glGetBufferParameteriv.xml">external</a> documentation.
 -spec getBufferParameteriv(Target, Pname) -> integer() when Target :: enum(),Pname :: enum().
 getBufferParameteriv(Target,Pname) ->
   call(5440, <<Target:?GLenum,Pname:?GLenum>>).
@@ -10412,35 +4330,7 @@ getBufferParameteriv(Target,Pname) ->
 %% draw buffer whereas ``gl:blendEquationSeparate'' sets the blend equations for all draw
 %% buffers. 
 %%
-%%  The blend equations use the source and destination blend factors specified by either  {@link gl:blendFunc/2} 
-%%  or  {@link gl:blendFuncSeparate/4} . See  {@link gl:blendFunc/2}  or  {@link gl:blendFuncSeparate/4} 
-%%  for a description of the various blend factors. 
-%%
-%%  In the equations that follow, source and destination color components are referred to
-%% as (R s G s B s A s) and (R d G d B d A d), respectively. The result color is referred to as (R r G r B r A r). The source and destination
-%% blend factors are denoted (s R s G s B s A) and (d R d G d B d A), respectively. For these equations all color components
-%% are understood to have values in the range  [0 1].  <table><tbody><tr><td>` Mode '</td><td>
-%% ` RGB Components '</td><td>` Alpha Component '</td></tr></tbody><tbody><tr><td>`?GL_FUNC_ADD'
-%% </td><td> Rr=R s  s R+R d  d R Gr=G s  s G+G d  d G Br=B s  s B+B d  d B</td><td> Ar=A s 
-%% s A+A d  d A</td></tr><tr><td>`?GL_FUNC_SUBTRACT'</td><td> Rr=R s  s R-R d  d R Gr=G
-%% s  s G-G d  d G Br=B s  s B-B d  d B</td><td> Ar=A s  s A-A d  d A</td></tr><tr><td>`?GL_FUNC_REVERSE_SUBTRACT'
-%% </td><td> Rr=R d  d R-R s  s R Gr=G d  d G-G s  s G Br=B d  d B-B s  s B</td><td> Ar=A d 
-%% d A-A s  s A</td></tr><tr><td>`?GL_MIN'</td><td> Rr=min(R s R d) Gr=min(G s G d) Br=min(B s B d)</td><td> Ar=min
-%% (A s A d)</td></tr><tr><td>`?GL_MAX'</td><td> Rr=max(R s R d) Gr=max(G s G d) Br=max(B s B d)</td><td> Ar=max(A s A d)</td></tr></tbody>
-%% </table>
-%%
-%%  The results of these equations are clamped to the range  [0 1]. 
-%%
-%%  The `?GL_MIN' and `?GL_MAX' equations are useful for applications that analyze
-%% image data (image thresholding against a constant color, for example). The `?GL_FUNC_ADD'
-%%  equation is useful for antialiasing and transparency, among other things. 
-%%
-%%  Initially, both the RGB blend equation and the alpha blend equation are set to `?GL_FUNC_ADD'
-%% . 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlendEquationSeparate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBlendEquationSeparate.xhtml">external</a> documentation.
 -spec blendEquationSeparate(ModeRGB, ModeAlpha) -> 'ok' when ModeRGB :: enum(),ModeAlpha :: enum().
 blendEquationSeparate(ModeRGB,ModeAlpha) ->
   cast(5441, <<ModeRGB:?GLenum,ModeAlpha:?GLenum>>).
@@ -10455,32 +4345,7 @@ blendEquationSeparate(ModeRGB,ModeAlpha) ->
 %% or equal to  `N'  is implicitly set to `?GL_NONE' and any data written to such
 %% an output is discarded.
 %%
-%% The symbolic constants contained in  `Bufs'  may be any of the following:
-%%
-%% `?GL_NONE': The fragment shader output value is not written into any color buffer.
-%%
-%% `?GL_FRONT_LEFT': The fragment shader output value is written into the front left
-%% color buffer.
-%%
-%% `?GL_FRONT_RIGHT': The fragment shader output value is written into the front right
-%% color buffer.
-%%
-%% `?GL_BACK_LEFT': The fragment shader output value is written into the back left color
-%% buffer.
-%%
-%% `?GL_BACK_RIGHT': The fragment shader output value is written into the back right
-%% color buffer.
-%%
-%% `?GL_COLOR_ATTACHMENT'`n': The fragment shader output value is written into
-%% the `n'th color attachment of the current framebuffer. `n' may range from 0
-%% to the value of `?GL_MAX_COLOR_ATTACHMENTS'.
-%%
-%% Except for `?GL_NONE', the preceding symbolic constants may not appear more than
-%% once in  `Bufs' . The maximum number of draw buffers supported is implementation dependent
-%% and can be queried by calling  {@link gl:getBooleanv/1}  with the argument `?GL_MAX_DRAW_BUFFERS'
-%% .
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawBuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawBuffers.xhtml">external</a> documentation.
 -spec drawBuffers(Bufs) -> 'ok' when Bufs :: [enum()].
 drawBuffers(Bufs) ->
   BufsLen = length(Bufs),
@@ -10495,55 +4360,7 @@ drawBuffers(Bufs) ->
 %% used in multipass rendering algorithms to achieve special effects, such as decals, outlining,
 %% and constructive solid geometry rendering. 
 %%
-%%  The stencil test conditionally eliminates a pixel based on the outcome of a comparison
-%% between the value in the stencil buffer and a reference value. To enable and disable the
-%% test, call  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_STENCIL_TEST'
-%% ; to control it, call   {@link gl:stencilFunc/3}  or   {@link gl:stencilFuncSeparate/4} . 
-%%
-%%  There can be two separate sets of  `Sfail' ,  `Dpfail' , and   `Dppass'  parameters;
-%% one affects back-facing polygons, and the other affects front-facing polygons as well
-%% as other non-polygon primitives.   {@link gl:stencilOp/3}  sets both front and back stencil
-%% state to the same values, as if   {@link gl:stencilOpSeparate/4}  were called with  `Face' 
-%%  set to `?GL_FRONT_AND_BACK'. 
-%%
-%% ``gl:stencilOpSeparate'' takes three arguments that indicate what happens to the stored
-%% stencil value while stenciling is enabled. If the stencil test fails, no change is made
-%% to the pixel's color or depth buffers, and  `Sfail'  specifies what happens to the
-%% stencil buffer contents. The following eight actions are possible. 
-%%
-%% `?GL_KEEP':  Keeps the current value. 
-%%
-%% `?GL_ZERO':  Sets the stencil buffer value to 0. 
-%%
-%% `?GL_REPLACE':  Sets the stencil buffer value to `ref', as specified by  {@link gl:stencilFunc/3} 
-%% . 
-%%
-%% `?GL_INCR':  Increments the current stencil buffer value. Clamps to the maximum representable
-%% unsigned value. 
-%%
-%% `?GL_INCR_WRAP':  Increments the current stencil buffer value. Wraps stencil buffer
-%% value to zero when incrementing the maximum representable unsigned value. 
-%%
-%% `?GL_DECR':  Decrements the current stencil buffer value. Clamps to 0. 
-%%
-%% `?GL_DECR_WRAP':  Decrements the current stencil buffer value. Wraps stencil buffer
-%% value to the maximum representable unsigned value when decrementing a stencil buffer value
-%% of zero. 
-%%
-%% `?GL_INVERT':  Bitwise inverts the current stencil buffer value. 
-%%
-%%  Stencil buffer values are treated as unsigned integers. When incremented and decremented,
-%% values are clamped to 0 and   2 n-1, where   n is the value returned by querying `?GL_STENCIL_BITS'
-%% . 
-%%
-%%  The other two arguments to ``gl:stencilOpSeparate'' specify stencil buffer actions
-%% that depend on whether subsequent depth buffer tests succeed ( `Dppass' ) or fail ( `Dpfail' 
-%% ) (see  {@link gl:depthFunc/1} ). The actions are specified using the same eight symbolic
-%% constants as  `Sfail' . Note that  `Dpfail'  is ignored when there is no depth buffer,
-%% or when the depth buffer is not enabled. In these cases,  `Sfail'  and  `Dppass' 
-%% specify stencil action when the stencil test fails and passes, respectively. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilOpSeparate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glStencilOpSeparate.xhtml">external</a> documentation.
 -spec stencilOpSeparate(Face, Sfail, Dpfail, Dppass) -> 'ok' when Face :: enum(),Sfail :: enum(),Dpfail :: enum(),Dppass :: enum().
 stencilOpSeparate(Face,Sfail,Dpfail,Dppass) ->
   cast(5443, <<Face:?GLenum,Sfail:?GLenum,Dpfail:?GLenum,Dppass:?GLenum>>).
@@ -10556,57 +4373,7 @@ stencilOpSeparate(Face,Sfail,Dpfail,Dppass) ->
 %% used in multipass rendering algorithms to achieve special effects, such as decals, outlining,
 %% and constructive solid geometry rendering. 
 %%
-%%  The stencil test conditionally eliminates a pixel based on the outcome of a comparison
-%% between the reference value and the value in the stencil buffer. To enable and disable
-%% the test, call  {@link gl:enable/1}  and  {@link gl:enable/1}  with argument `?GL_STENCIL_TEST'
-%% . To specify actions based on the outcome of the stencil test, call  {@link gl:stencilOp/3} 
-%% or   {@link gl:stencilOpSeparate/4} . 
-%%
-%%  There can be two separate sets of  `Func' ,  `Ref' , and   `Mask'  parameters;
-%% one affects back-facing polygons, and the other affects front-facing polygons as well
-%% as other non-polygon primitives.   {@link gl:stencilFunc/3}  sets both front and back stencil
-%% state to the same values, as if   {@link gl:stencilFuncSeparate/4}  were called with  `Face' 
-%%  set to `?GL_FRONT_AND_BACK'. 
-%%
-%%  `Func'  is a symbolic constant that determines the stencil comparison function. It
-%% accepts one of eight values, shown in the following list.  `Ref'  is an integer reference
-%% value that is used in the stencil comparison. It is clamped to the range  [0 2 n-1], where   n
-%% is the number of bitplanes in the stencil buffer.  `Mask'  is bitwise ANDed with both
-%% the reference value and the stored stencil value, with the ANDed values participating
-%% in the comparison. 
-%%
-%%  If `stencil' represents the value stored in the corresponding stencil buffer location,
-%% the following list shows the effect of each comparison function that can be specified by  `Func' 
-%% . Only if the comparison succeeds is the pixel passed through to the next stage in the
-%% rasterization process (see  {@link gl:stencilOp/3} ). All tests treat `stencil' values
-%% as unsigned integers in the range [0 2 n-1], where   n is the number of bitplanes in the stencil
-%% buffer. 
-%%
-%%  The following values are accepted by  `Func' : 
-%%
-%% `?GL_NEVER':  Always fails. 
-%%
-%% `?GL_LESS':  Passes if (  `Ref'  &amp;  `Mask'  ) &lt; ( `stencil' &amp;  `Mask' 
-%%  ). 
-%%
-%% `?GL_LEQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) &lt;= ( `stencil'
-%% &amp;  `Mask'  ). 
-%%
-%% `?GL_GREATER':  Passes if (  `Ref'  &amp;  `Mask'  ) &gt; ( `stencil'
-%% &amp;  `Mask'  ). 
-%%
-%% `?GL_GEQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) &gt;= ( `stencil'
-%% &amp;  `Mask'  ). 
-%%
-%% `?GL_EQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) = ( `stencil' &amp;  `Mask' 
-%%  ). 
-%%
-%% `?GL_NOTEQUAL':  Passes if (  `Ref'  &amp;  `Mask'  ) != ( `stencil' &amp;
-%%  `Mask'  ). 
-%%
-%% `?GL_ALWAYS':  Always passes. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilFuncSeparate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glStencilFuncSeparate.xhtml">external</a> documentation.
 -spec stencilFuncSeparate(Face, Func, Ref, Mask) -> 'ok' when Face :: enum(),Func :: enum(),Ref :: integer(),Mask :: integer().
 stencilFuncSeparate(Face,Func,Ref,Mask) ->
   cast(5444, <<Face:?GLenum,Func:?GLenum,Ref:?GLint,Mask:?GLuint>>).
@@ -10619,12 +4386,7 @@ stencilFuncSeparate(Face,Func,Ref,Mask) ->
 %% to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit
 %% is write-protected. Initially, all bits are enabled for writing. 
 %%
-%%  There can be two separate  `Mask'  writemasks; one affects back-facing polygons, and
-%% the other affects front-facing polygons as well as other non-polygon primitives.   {@link gl:stencilMask/1} 
-%%  sets both front and back stencil writemasks to the same values, as if  {@link gl:stencilMaskSeparate/2} 
-%%  were called with  `Face'  set to `?GL_FRONT_AND_BACK'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilMaskSeparate.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glStencilMaskSeparate.xhtml">external</a> documentation.
 -spec stencilMaskSeparate(Face, Mask) -> 'ok' when Face :: enum(),Mask :: integer().
 stencilMaskSeparate(Face,Mask) ->
   cast(5445, <<Face:?GLenum,Mask:?GLuint>>).
@@ -10638,17 +4400,7 @@ stencilMaskSeparate(Face,Mask) ->
 %% the  program object specified by  `Program' . This  indicates that  `Shader'  will
 %% be included in  link operations that will be performed on   `Program' .
 %%
-%% All operations that can be performed on a shader object  are valid whether or not the
-%% shader object is attached to a  program object. It is permissible to attach a shader object
-%% to a  program object before source code has been loaded into the  shader object or before
-%% the shader object has been compiled. It  is permissible to attach multiple shader objects
-%% of the same  type because each may contain a portion of the complete shader.  It is also
-%% permissible to attach a shader object to more than  one program object. If a shader object
-%% is deleted while it is  attached to a program object, it will be flagged for deletion,
-%%  and deletion will not occur until   {@link gl:detachShader/2}   is called to detach it from
-%% all program objects to which it is  attached.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glAttachShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glAttachShader.xhtml">external</a> documentation.
 -spec attachShader(Program, Shader) -> 'ok' when Program :: integer(),Shader :: integer().
 attachShader(Program,Shader) ->
   cast(5446, <<Program:?GLuint,Shader:?GLuint>>).
@@ -10663,29 +4415,7 @@ attachShader(Program,Shader) ->
 %% attribute  `Index'  will modify the value of the user-defined attribute variable specified
 %% by  `Name' .
 %%
-%% If  `Name'  refers to a matrix attribute variable,  `Index'  refers to the first
-%% column of the matrix. Other matrix columns are then automatically bound to locations  `Index+1' 
-%%  for a matrix of type `mat2';  `Index+1'  and  `Index+2'  for a matrix of type
-%% `mat3'; and  `Index+1' ,  `Index+2' , and  `Index+3'  for a matrix of type `mat4'
-%% .
-%%
-%% This command makes it possible for vertex shaders to use descriptive names for attribute
-%% variables rather than generic variables that are numbered from 0 to `?GL_MAX_VERTEX_ATTRIBS'
-%%  -1. The values sent to each generic attribute index are part of current state. If a different
-%% program object is made current by calling  {@link gl:useProgram/1} , the generic vertex attributes
-%% are tracked in such a way that the same values will be observed by attributes in the new
-%% program object that are also bound to  `Index' .
-%%
-%% Attribute variable name-to-generic attribute index bindings for a program object can be
-%% explicitly assigned at any time by calling ``gl:bindAttribLocation''. Attribute bindings
-%% do not go into effect until  {@link gl:linkProgram/1}  is called. After a program object
-%% has been linked successfully, the index values for generic attributes remain fixed (and
-%% their values can be queried) until the next link command occurs.
-%%
-%% Any attribute binding that occurs after the program object has been linked will not take
-%% effect until the next time the program object is linked.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindAttribLocation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindAttribLocation.xhtml">external</a> documentation.
 -spec bindAttribLocation(Program, Index, Name) -> 'ok' when Program :: integer(),Index :: integer(),Name :: string().
 bindAttribLocation(Program,Index,Name) ->
   NameLen = length(Name),
@@ -10696,17 +4426,7 @@ bindAttribLocation(Program,Index,Name) ->
 %% ``gl:compileShader'' compiles the source code strings that have been stored in the shader
 %% object specified by  `Shader' .
 %%
-%% The compilation status will be stored as part of the shader object's state. This value
-%% will be set to `?GL_TRUE' if the shader was compiled without errors and is ready
-%% for use, and `?GL_FALSE' otherwise. It can be queried by calling  {@link gl:getShaderiv/2} 
-%%  with arguments  `Shader'  and `?GL_COMPILE_STATUS'.
-%%
-%% Compilation of a shader can fail for a number of reasons as specified by the OpenGL Shading
-%% Language Specification. Whether or not the compilation was successful, information about
-%% the compilation can be obtained from the shader object's information log by calling  {@link gl:getShaderInfoLog/2} 
-%% .
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompileShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCompileShader.xhtml">external</a> documentation.
 -spec compileShader(Shader) -> 'ok' when Shader :: integer().
 compileShader(Shader) ->
   cast(5448, <<Shader:?GLuint>>).
@@ -10721,15 +4441,7 @@ compileShader(Shader) ->
 %% between a vertex shader and a  fragment shader). When no longer needed as part of a program
 %%  object, shader objects can be detached.
 %%
-%% One or more executables are created in a program object by  successfully attaching shader
-%% objects to it with   {@link gl:attachShader/2} ,  successfully compiling the shader objects
-%% with   {@link gl:compileShader/1} ,  and successfully linking the program object with   {@link gl:linkProgram/1} 
-%% .  These executables are made part of current state when   {@link gl:useProgram/1}   is called.
-%% Program objects can be deleted by calling   {@link gl:deleteProgram/1} .  The memory associated
-%% with the program object will be deleted  when it is no longer part of current rendering
-%% state for any  context.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCreateProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCreateProgram.xhtml">external</a> documentation.
 -spec createProgram() -> integer().
 createProgram() ->
   call(5449, <<>>).
@@ -10748,11 +4460,7 @@ createProgram() ->
 %% programmable geometry processor. A shader of  type `?GL_FRAGMENT_SHADER' is a shader
 %% that is  intended to run on the programmable fragment processor.
 %%
-%% When created, a shader object's  `?GL_SHADER_TYPE' parameter is set to either  `?GL_VERTEX_SHADER'
-%% , `?GL_TESS_CONTROL_SHADER',  `?GL_TESS_EVALUATION_SHADER', `?GL_GEOMETRY_SHADER'
-%%   or `?GL_FRAGMENT_SHADER', depending on the value  of  `ShaderType' .
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCreateShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCreateShader.xhtml">external</a> documentation.
 -spec createShader(Type) -> integer() when Type :: enum().
 createShader(Type) ->
   call(5450, <<Type:?GLenum>>).
@@ -10763,17 +4471,7 @@ createShader(Type) ->
 %% object specified by  `Program.'  This command effectively undoes the effects of a call
 %% to  {@link gl:createProgram/0} .
 %%
-%% If a program object is in use as part of current rendering state, it will be flagged for
-%% deletion, but it will not be deleted until it is no longer part of current state for any
-%% rendering context. If a program object to be deleted has shader objects attached to it,
-%% those shader objects will be automatically detached but not deleted unless they have already
-%% been flagged for deletion by a previous call to  {@link gl:deleteShader/1} . A value of 0
-%% for  `Program'  will be silently ignored.
-%%
-%% To determine whether a program object has been flagged for deletion, call  {@link gl:getProgramiv/2} 
-%%  with arguments  `Program'  and `?GL_DELETE_STATUS'.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteProgram.xhtml">external</a> documentation.
 -spec deleteProgram(Program) -> 'ok' when Program :: integer().
 deleteProgram(Program) ->
   cast(5451, <<Program:?GLuint>>).
@@ -10784,15 +4482,7 @@ deleteProgram(Program) ->
 %% object specified by  `Shader' . This command effectively undoes the effects of a call
 %% to  {@link gl:createShader/1} .
 %%
-%% If a shader object to be deleted is attached to a program object, it will be flagged for
-%% deletion, but it will not be deleted until it is no longer attached to any program object,
-%% for any rendering context (i.e., it must be detached from wherever it was attached before
-%% it will be deleted). A value of 0 for  `Shader'  will be silently ignored.
-%%
-%% To determine whether an object has been flagged for deletion, call  {@link gl:getShaderiv/2} 
-%% with arguments  `Shader'  and `?GL_DELETE_STATUS'.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteShader.xhtml">external</a> documentation.
 -spec deleteShader(Shader) -> 'ok' when Shader :: integer().
 deleteShader(Shader) ->
   cast(5452, <<Shader:?GLuint>>).
@@ -10803,11 +4493,7 @@ deleteShader(Shader) ->
 %% object specified by  `Program' . This command can be used to undo the effect of the
 %% command  {@link gl:attachShader/2} .
 %%
-%% If  `Shader'  has already been flagged for deletion by a call to  {@link gl:deleteShader/1} 
-%%  and it is not attached to any other program object, it will be deleted after it has been
-%% detached.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDetachShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDetachShader.xhtml">external</a> documentation.
 -spec detachShader(Program, Shader) -> 'ok' when Program :: integer(),Shader :: integer().
 detachShader(Program,Shader) ->
   cast(5453, <<Program:?GLuint,Shader:?GLuint>>).
@@ -10822,7 +4508,7 @@ detachShader(Program,Shader) ->
 %% such as  {@link gl:drawArrays/3} ,  {@link gl:drawElements/4} ,  {@link gl:drawRangeElements/6} , see `glMultiDrawElements'
 %% , or  {@link gl:multiDrawArrays/3} .
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glEnableVertexAttribArray.xhtml">external</a> documentation.
 -spec disableVertexAttribArray(Index) -> 'ok' when Index :: integer().
 disableVertexAttribArray(Index) ->
   cast(5454, <<Index:?GLuint>>).
@@ -10841,52 +4527,7 @@ enableVertexAttribArray(Index) ->
 %% of 0 for  `Index'  selects the first active attribute variable. Permissible values
 %% for  `Index'  range from 0 to the number of active attribute variables minus 1.
 %%
-%% A vertex shader may use either built-in attribute variables, user-defined attribute variables,
-%% or both. Built-in attribute variables have a prefix of "gl_" and reference conventional
-%% OpenGL vertex attribtes (e.g.,  `Gl_Vertex' ,  `Gl_Normal' , etc., see the OpenGL
-%% Shading Language specification for a complete list.) User-defined attribute variables
-%% have arbitrary names and obtain their values through numbered generic vertex attributes.
-%% An attribute variable (either built-in or user-defined) is considered active if it is
-%% determined during the link operation that it may be accessed during program execution.
-%% Therefore,  `Program'  should have previously been the target of a call to  {@link gl:linkProgram/1} 
-%% , but it is not necessary for it to have been linked successfully.
-%%
-%% The size of the character buffer required to store the longest attribute variable name
-%% in  `Program'  can be obtained by calling  {@link gl:getProgramiv/2}  with the value `?GL_ACTIVE_ATTRIBUTE_MAX_LENGTH'
-%% . This value should be used to allocate a buffer of sufficient size to store the returned
-%% attribute name. The size of this character buffer is passed in  `BufSize' , and a pointer
-%% to this character buffer is passed in  `Name' .
-%%
-%% ``gl:getActiveAttrib'' returns the name of the attribute variable indicated by  `Index' 
-%% , storing it in the character buffer specified by  `Name' . The string returned will
-%% be null terminated. The actual number of characters written into this buffer is returned
-%% in  `Length' , and this count does not include the null termination character. If the
-%% length of the returned string is not required, a value of `?NULL' can be passed in
-%% the  `Length'  argument.
-%%
-%% The  `Type'  argument specifies a pointer to a variable into which the attribute variable's
-%% data type will be written. The symbolic constants `?GL_FLOAT', `?GL_FLOAT_VEC2',
-%% `?GL_FLOAT_VEC3', `?GL_FLOAT_VEC4', `?GL_FLOAT_MAT2', `?GL_FLOAT_MAT3',
-%% `?GL_FLOAT_MAT4', `?GL_FLOAT_MAT2x3', `?GL_FLOAT_MAT2x4', `?GL_FLOAT_MAT3x2'
-%% , `?GL_FLOAT_MAT3x4', `?GL_FLOAT_MAT4x2', `?GL_FLOAT_MAT4x3', `?GL_INT'
-%% , `?GL_INT_VEC2', `?GL_INT_VEC3', `?GL_INT_VEC4', `?GL_UNSIGNED_INT_VEC'
-%% , `?GL_UNSIGNED_INT_VEC2', `?GL_UNSIGNED_INT_VEC3', `?GL_UNSIGNED_INT_VEC4',
-%% `?DOUBLE', `?DOUBLE_VEC2', `?DOUBLE_VEC3', `?DOUBLE_VEC4', `?DOUBLE_MAT2'
-%% , `?DOUBLE_MAT3', `?DOUBLE_MAT4', `?DOUBLE_MAT2x3', `?DOUBLE_MAT2x4',
-%% `?DOUBLE_MAT3x2', `?DOUBLE_MAT3x4', `?DOUBLE_MAT4x2', or `?DOUBLE_MAT4x3'
-%%  may be returned. The  `Size'  argument will return the size of the attribute, in units
-%% of the type returned in  `Type' .
-%%
-%% The list of active attribute variables may include both built-in attribute variables (which
-%% begin with the prefix "gl_") as well as user-defined attribute variable names.
-%%
-%% This function will return as much information as it can about the specified active attribute
-%% variable. If no information is available,  `Length'  will be 0, and  `Name'  will
-%% be an empty string. This situation could occur if this function is called after a link
-%% operation that failed. If an error occurs, the return values  `Length' ,  `Size' ,  `Type' 
-%% , and  `Name'  will be unmodified.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveAttrib.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveAttrib.xhtml">external</a> documentation.
 -spec getActiveAttrib(Program, Index, BufSize) -> {Size :: integer(),Type :: enum(),Name :: string()} when Program :: integer(),Index :: integer(),BufSize :: integer().
 getActiveAttrib(Program,Index,BufSize) ->
   call(5456, <<Program:?GLuint,Index:?GLuint,BufSize:?GLsizei>>).
@@ -10899,141 +4540,7 @@ getActiveAttrib(Program,Index,BufSize) ->
 %% A value of 0 for  `Index'  selects the first active uniform variable. Permissible values
 %% for  `Index'  range from 0 to the number of active uniform variables minus 1.
 %%
-%% Shaders may use either built-in uniform variables, user-defined uniform variables, or
-%% both. Built-in uniform variables have a prefix of "gl_" and reference existing OpenGL
-%% state or values derived from such state (e.g.,  `Gl_DepthRangeParameters' , see the
-%% OpenGL Shading Language specification for a complete list.) User-defined uniform variables
-%% have arbitrary names and obtain their values from the application through calls to  {@link gl:uniform1f/2} 
-%% . A uniform variable (either built-in or user-defined) is considered active if it is determined
-%% during the link operation that it may be accessed during program execution. Therefore,  `Program' 
-%%  should have previously been the target of a call to  {@link gl:linkProgram/1} , but it is
-%% not necessary for it to have been linked successfully.
-%%
-%% The size of the character buffer required to store the longest uniform variable name in  `Program' 
-%%  can be obtained by calling  {@link gl:getProgramiv/2}  with the value `?GL_ACTIVE_UNIFORM_MAX_LENGTH'
-%% . This value should be used to allocate a buffer of sufficient size to store the returned
-%% uniform variable name. The size of this character buffer is passed in  `BufSize' ,
-%% and a pointer to this character buffer is passed in  `Name.' 
-%%
-%% ``gl:getActiveUniform'' returns the name of the uniform variable indicated by  `Index' 
-%% , storing it in the character buffer specified by  `Name' . The string returned will
-%% be null terminated. The actual number of characters written into this buffer is returned
-%% in  `Length' , and this count does not include the null termination character. If the
-%% length of the returned string is not required, a value of `?NULL' can be passed in
-%% the  `Length'  argument.
-%%
-%% The  `Type'  argument will return a pointer to the uniform variable's data type. The
-%% symbolic constants returned for uniform types are shown in the table below. <table><tbody>
-%% <tr><td>` Returned Symbolic Contant '</td><td>` Shader Uniform Type '</td></tr></tbody>
-%% <tbody><tr><td>`?GL_FLOAT'</td><td>`?float'</td></tr><tr><td>`?GL_FLOAT_VEC2'
-%% </td><td>`?vec2'</td></tr><tr><td>`?GL_FLOAT_VEC3'</td><td>`?vec3'</td></tr>
-%% <tr><td>`?GL_FLOAT_VEC4'</td><td>`?vec4'</td></tr><tr><td>`?GL_DOUBLE'</td>
-%% <td>`?double'</td></tr><tr><td>`?GL_DOUBLE_VEC2'</td><td>`?dvec2'</td></tr>
-%% <tr><td>`?GL_DOUBLE_VEC3'</td><td>`?dvec3'</td></tr><tr><td>`?GL_DOUBLE_VEC4'
-%% </td><td>`?dvec4'</td></tr><tr><td>`?GL_INT'</td><td>`?int'</td></tr><tr><td>
-%% `?GL_INT_VEC2'</td><td>`?ivec2'</td></tr><tr><td>`?GL_INT_VEC3'</td><td>`?ivec3'
-%% </td></tr><tr><td>`?GL_INT_VEC4'</td><td>`?ivec4'</td></tr><tr><td>`?GL_UNSIGNED_INT'
-%% </td><td>`?unsigned int'</td></tr><tr><td>`?GL_UNSIGNED_INT_VEC2'</td><td>`?uvec2'
-%% </td></tr><tr><td>`?GL_UNSIGNED_INT_VEC3'</td><td>`?uvec3'</td></tr><tr><td>`?GL_UNSIGNED_INT_VEC4'
-%% </td><td>`?uvec4'</td></tr><tr><td>`?GL_BOOL'</td><td>`?bool'</td></tr><tr>
-%% <td>`?GL_BOOL_VEC2'</td><td>`?bvec2'</td></tr><tr><td>`?GL_BOOL_VEC3'</td><td>
-%% `?bvec3'</td></tr><tr><td>`?GL_BOOL_VEC4'</td><td>`?bvec4'</td></tr><tr><td>
-%% `?GL_FLOAT_MAT2'</td><td>`?mat2'</td></tr><tr><td>`?GL_FLOAT_MAT3'</td><td>
-%% `?mat3'</td></tr><tr><td>`?GL_FLOAT_MAT4'</td><td>`?mat4'</td></tr><tr><td>
-%% `?GL_FLOAT_MAT2x3'</td><td>`?mat2x3'</td></tr><tr><td>`?GL_FLOAT_MAT2x4'</td>
-%% <td>`?mat2x4'</td></tr><tr><td>`?GL_FLOAT_MAT3x2'</td><td>`?mat3x2'</td></tr>
-%% <tr><td>`?GL_FLOAT_MAT3x4'</td><td>`?mat3x4'</td></tr><tr><td>`?GL_FLOAT_MAT4x2'
-%% </td><td>`?mat4x2'</td></tr><tr><td>`?GL_FLOAT_MAT4x3'</td><td>`?mat4x3'</td>
-%% </tr><tr><td>`?GL_DOUBLE_MAT2'</td><td>`?dmat2'</td></tr><tr><td>`?GL_DOUBLE_MAT3'
-%% </td><td>`?dmat3'</td></tr><tr><td>`?GL_DOUBLE_MAT4'</td><td>`?dmat4'</td></tr>
-%% <tr><td>`?GL_DOUBLE_MAT2x3'</td><td>`?dmat2x3'</td></tr><tr><td>`?GL_DOUBLE_MAT2x4'
-%% </td><td>`?dmat2x4'</td></tr><tr><td>`?GL_DOUBLE_MAT3x2'</td><td>`?dmat3x2'</td>
-%% </tr><tr><td>`?GL_DOUBLE_MAT3x4'</td><td>`?dmat3x4'</td></tr><tr><td>`?GL_DOUBLE_MAT4x2'
-%% </td><td>`?dmat4x2'</td></tr><tr><td>`?GL_DOUBLE_MAT4x3'</td><td>`?dmat4x3'</td>
-%% </tr><tr><td>`?GL_SAMPLER_1D'</td><td>`?sampler1D'</td></tr><tr><td>`?GL_SAMPLER_2D'
-%% </td><td>`?sampler2D'</td></tr><tr><td>`?GL_SAMPLER_3D'</td><td>`?sampler3D'
-%% </td></tr><tr><td>`?GL_SAMPLER_CUBE'</td><td>`?samplerCube'</td></tr><tr><td>`?GL_SAMPLER_1D_SHADOW'
-%% </td><td>`?sampler1DShadow'</td></tr><tr><td>`?GL_SAMPLER_2D_SHADOW'</td><td>`?sampler2DShadow'
-%% </td></tr><tr><td>`?GL_SAMPLER_1D_ARRAY'</td><td>`?sampler1DArray'</td></tr><tr>
-%% <td>`?GL_SAMPLER_2D_ARRAY'</td><td>`?sampler2DArray'</td></tr><tr><td>`?GL_SAMPLER_1D_ARRAY_SHADOW'
-%% </td><td>`?sampler1DArrayShadow'</td></tr><tr><td>`?GL_SAMPLER_2D_ARRAY_SHADOW'</td>
-%% <td>`?sampler2DArrayShadow'</td></tr><tr><td>`?GL_SAMPLER_2D_MULTISAMPLE'</td><td>
-%% `?sampler2DMS'</td></tr><tr><td>`?GL_SAMPLER_2D_MULTISAMPLE_ARRAY'</td><td>`?sampler2DMSArray'
-%% </td></tr><tr><td>`?GL_SAMPLER_CUBE_SHADOW'</td><td>`?samplerCubeShadow'</td></tr>
-%% <tr><td>`?GL_SAMPLER_BUFFER'</td><td>`?samplerBuffer'</td></tr><tr><td>`?GL_SAMPLER_2D_RECT'
-%% </td><td>`?sampler2DRect'</td></tr><tr><td>`?GL_SAMPLER_2D_RECT_SHADOW'</td><td>
-%% `?sampler2DRectShadow'</td></tr><tr><td>`?GL_INT_SAMPLER_1D'</td><td>`?isampler1D'
-%% </td></tr><tr><td>`?GL_INT_SAMPLER_2D'</td><td>`?isampler2D'</td></tr><tr><td>`?GL_INT_SAMPLER_3D'
-%% </td><td>`?isampler3D'</td></tr><tr><td>`?GL_INT_SAMPLER_CUBE'</td><td>`?isamplerCube'
-%% </td></tr><tr><td>`?GL_INT_SAMPLER_1D_ARRAY'</td><td>`?isampler1DArray'</td></tr>
-%% <tr><td>`?GL_INT_SAMPLER_2D_ARRAY'</td><td>`?isampler2DArray'</td></tr><tr><td>`?GL_INT_SAMPLER_2D_MULTISAMPLE'
-%% </td><td>`?isampler2DMS'</td></tr><tr><td>`?GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY'</td>
-%% <td>`?isampler2DMSArray'</td></tr><tr><td>`?GL_INT_SAMPLER_BUFFER'</td><td>`?isamplerBuffer'
-%% </td></tr><tr><td>`?GL_INT_SAMPLER_2D_RECT'</td><td>`?isampler2DRect'</td></tr><tr>
-%% <td>`?GL_UNSIGNED_INT_SAMPLER_1D'</td><td>`?usampler1D'</td></tr><tr><td>`?GL_UNSIGNED_INT_SAMPLER_2D'
-%% </td><td>`?usampler2D'</td></tr><tr><td>`?GL_UNSIGNED_INT_SAMPLER_3D'</td><td>`?usampler3D'
-%% </td></tr><tr><td>`?GL_UNSIGNED_INT_SAMPLER_CUBE'</td><td>`?usamplerCube'</td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT_SAMPLER_1D_ARRAY'</td><td>`?usampler2DArray'</td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT_SAMPLER_2D_ARRAY'</td><td>`?usampler2DArray'</td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE'</td><td>`?usampler2DMS'</td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY'</td><td>`?usampler2DMSArray'
-%% </td></tr><tr><td>`?GL_UNSIGNED_INT_SAMPLER_BUFFER'</td><td>`?usamplerBuffer'</td>
-%% </tr><tr><td>`?GL_UNSIGNED_INT_SAMPLER_2D_RECT'</td><td>`?usampler2DRect'</td></tr>
-%% <tr><td>`?GL_IMAGE_1D'</td><td>`?image1D'</td></tr><tr><td>`?GL_IMAGE_2D'</td>
-%% <td>`?image2D'</td></tr><tr><td>`?GL_IMAGE_3D'</td><td>`?image3D'</td></tr>
-%% <tr><td>`?GL_IMAGE_2D_RECT'</td><td>`?image2DRect'</td></tr><tr><td>`?GL_IMAGE_CUBE'
-%% </td><td>`?imageCube'</td></tr><tr><td>`?GL_IMAGE_BUFFER'</td><td>`?imageBuffer'
-%% </td></tr><tr><td>`?GL_IMAGE_1D_ARRAY'</td><td>`?image1DArray'</td></tr><tr><td>
-%% `?GL_IMAGE_2D_ARRAY'</td><td>`?image2DArray'</td></tr><tr><td>`?GL_IMAGE_2D_MULTISAMPLE'
-%% </td><td>`?image2DMS'</td></tr><tr><td>`?GL_IMAGE_2D_MULTISAMPLE_ARRAY'</td><td>
-%% `?image2DMSArray'</td></tr><tr><td>`?GL_INT_IMAGE_1D'</td><td>`?iimage1D'</td>
-%% </tr><tr><td>`?GL_INT_IMAGE_2D'</td><td>`?iimage2D'</td></tr><tr><td>`?GL_INT_IMAGE_3D'
-%% </td><td>`?iimage3D'</td></tr><tr><td>`?GL_INT_IMAGE_2D_RECT'</td><td>`?iimage2DRect'
-%% </td></tr><tr><td>`?GL_INT_IMAGE_CUBE'</td><td>`?iimageCube'</td></tr><tr><td>`?GL_INT_IMAGE_BUFFER'
-%% </td><td>`?iimageBuffer'</td></tr><tr><td>`?GL_INT_IMAGE_1D_ARRAY'</td><td>`?iimage1DArray'
-%% </td></tr><tr><td>`?GL_INT_IMAGE_2D_ARRAY'</td><td>`?iimage2DArray'</td></tr><tr>
-%% <td>`?GL_INT_IMAGE_2D_MULTISAMPLE'</td><td>`?iimage2DMS'</td></tr><tr><td>`?GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY'
-%% </td><td>`?iimage2DMSArray'</td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_1D'</td><td>
-%% `?uimage1D'</td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_2D'</td><td>`?uimage2D'
-%% </td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_3D'</td><td>`?uimage3D'</td></tr><tr><td>
-%% `?GL_UNSIGNED_INT_IMAGE_2D_RECT'</td><td>`?uimage2DRect'</td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_CUBE'
-%% </td><td>`?uimageCube'</td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_BUFFER'</td><td>
-%% `?uimageBuffer'</td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_1D_ARRAY'</td><td>`?uimage1DArray'
-%% </td></tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_2D_ARRAY'</td><td>`?uimage2DArray'</td>
-%% </tr><tr><td>`?GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE'</td><td>`?uimage2DMS'</td></tr>
-%% <tr><td>`?GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY'</td><td>`?uimage2DMSArray'</td>
-%% </tr><tr><td>`?GL_UNSIGNED_INT_ATOMIC_COUNTER'</td><td>`?atomic_uint'</td></tr></tbody>
-%% </table>
-%%
-%% If one or more elements of an array are active, the name of the array is returned in  `Name' 
-%% , the type is returned in  `Type' , and the  `Size'  parameter returns the highest
-%% array element index used, plus one, as determined by the compiler and/or linker. Only
-%% one active uniform variable will be reported for a uniform array.
-%%
-%% Uniform variables that are declared as structures or arrays of structures will not be
-%% returned directly by this function. Instead, each of these uniform variables will be reduced
-%% to its fundamental components containing the "." and "[]" operators such that each of
-%% the names is valid as an argument to  {@link gl:getUniformLocation/2} . Each of these reduced
-%% uniform variables is counted as one active uniform variable and is assigned an index.
-%% A valid name cannot be a structure, an array of structures, or a subcomponent of a vector
-%% or matrix.
-%%
-%% The size of the uniform variable will be returned in  `Size' . Uniform variables other
-%% than arrays will have a size of 1. Structures and arrays of structures will be reduced
-%% as described earlier, such that each of the names returned will be a data type in the
-%% earlier list. If this reduction results in an array, the size returned will be as described
-%% for uniform arrays; otherwise, the size returned will be 1.
-%%
-%% The list of active uniform variables may include both built-in uniform variables (which
-%% begin with the prefix "gl_") as well as user-defined uniform variable names.
-%%
-%% This function will return as much information as it can about the specified active uniform
-%% variable. If no information is available,  `Length'  will be 0, and  `Name'  will
-%% be an empty string. This situation could occur if this function is called after a link
-%% operation that failed. If an error occurs, the return values  `Length' ,  `Size' ,  `Type' 
-%% , and  `Name'  will be unmodified.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveUniform.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveUniform.xhtml">external</a> documentation.
 -spec getActiveUniform(Program, Index, BufSize) -> {Size :: integer(),Type :: enum(),Name :: string()} when Program :: integer(),Index :: integer(),BufSize :: integer().
 getActiveUniform(Program,Index,BufSize) ->
   call(5457, <<Program:?GLuint,Index:?GLuint,BufSize:?GLsizei>>).
@@ -11047,13 +4554,7 @@ getActiveUniform(Program,Index,BufSize) ->
 %% number of shader names that may be returned in  `Shaders'  is specified by  `MaxCount' 
 %% . 
 %%
-%% If the number of names actually returned is not required (for instance, if it has just
-%% been obtained by calling  {@link gl:getProgramiv/2} ), a value of `?NULL' may be passed
-%% for count. If no shader objects are attached to  `Program' , a value of 0 will be returned
-%% in  `Count' . The actual number of attached shaders can be obtained by calling  {@link gl:getProgramiv/2} 
-%%  with the value `?GL_ATTACHED_SHADERS'.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetAttachedShaders.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetAttachedShaders.xhtml">external</a> documentation.
 -spec getAttachedShaders(Program, MaxCount) -> [integer()] when Program :: integer(),MaxCount :: integer().
 getAttachedShaders(Program,MaxCount) ->
   call(5458, <<Program:?GLuint,MaxCount:?GLsizei>>).
@@ -11067,17 +4568,7 @@ getAttachedShaders(Program,MaxCount) ->
 %% attribute variable is not an active attribute in the specified program object or if  `Name' 
 %%  starts with the reserved prefix "gl_", a value of -1 is returned.
 %%
-%% The association between an attribute variable name and a generic attribute index can be
-%% specified at any time by calling  {@link gl:bindAttribLocation/3} . Attribute bindings do
-%% not go into effect until  {@link gl:linkProgram/1}  is called. After a program object has
-%% been linked successfully, the index values for attribute variables remain fixed until
-%% the next link command occurs. The attribute values can only be queried after a link if
-%% the link was successful. ``gl:getAttribLocation'' returns the binding that actually
-%% went into effect the last time  {@link gl:linkProgram/1}  was called for the specified program
-%% object. Attribute bindings that have been specified since the last link operation are
-%% not returned by ``gl:getAttribLocation''.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetAttribLocation.xhtml">external</a> documentation.
 -spec getAttribLocation(Program, Name) -> integer() when Program :: integer(),Name :: string().
 getAttribLocation(Program,Name) ->
   NameLen = length(Name),
@@ -11088,68 +4579,7 @@ getAttribLocation(Program,Name) ->
 %% ``gl:getProgram'' returns in  `Params'  the value of a parameter for a specific program
 %% object. The following parameters are defined:
 %%
-%% `?GL_DELETE_STATUS':  `Params'  returns `?GL_TRUE' if  `Program'  is currently
-%% flagged for deletion, and `?GL_FALSE' otherwise.
-%%
-%% `?GL_LINK_STATUS':  `Params'  returns `?GL_TRUE' if the last link operation
-%% on  `Program'  was successful, and `?GL_FALSE' otherwise.
-%%
-%% `?GL_VALIDATE_STATUS':  `Params'  returns `?GL_TRUE' or if the last validation
-%% operation on  `Program'  was successful, and `?GL_FALSE' otherwise.
-%%
-%% `?GL_INFO_LOG_LENGTH':  `Params'  returns the number of characters in the information
-%% log for  `Program'  including the null termination character (i.e., the size of the
-%% character buffer required to store the information log). If  `Program'  has no information
-%% log, a value of 0 is returned.
-%%
-%% `?GL_ATTACHED_SHADERS':  `Params'  returns the number of shader objects attached
-%% to  `Program' .
-%%
-%% `?GL_ACTIVE_ATOMIC_COUNTER_BUFFERS':  `Params'  returns the number of active attribute
-%% atomic counter buffers used by  `Program' .
-%%
-%% `?GL_ACTIVE_ATTRIBUTES':  `Params'  returns the number of active attribute variables
-%% for  `Program' .
-%%
-%% `?GL_ACTIVE_ATTRIBUTE_MAX_LENGTH':  `Params'  returns the length of the longest
-%% active attribute name for  `Program' , including the null termination character (i.e.,
-%% the size of the character buffer required to store the longest attribute name). If no
-%% active attributes exist, 0 is returned.
-%%
-%% `?GL_ACTIVE_UNIFORMS':  `Params'  returns the number of active uniform variables
-%% for  `Program' .
-%%
-%% `?GL_ACTIVE_UNIFORM_MAX_LENGTH':  `Params'  returns the length of the longest
-%% active uniform variable name for  `Program' , including the null termination character
-%% (i.e., the size of the character buffer required to store the longest uniform variable
-%% name). If no active uniform variables exist, 0 is returned.
-%%
-%% `?GL_PROGRAM_BINARY_LENGTH':  `Params'  returns the length of the program binary,
-%% in bytes that will be returned by a call to  {@link gl:getProgramBinary/2} . When a progam's
-%% `?GL_LINK_STATUS' is `?GL_FALSE', its program binary length is zero. 
-%%
-%% `?GL_TRANSFORM_FEEDBACK_BUFFER_MODE':  `Params'  returns a symbolic constant indicating
-%% the buffer mode used when transform feedback is active. This may be `?GL_SEPARATE_ATTRIBS'
-%%  or `?GL_INTERLEAVED_ATTRIBS'.
-%%
-%% `?GL_TRANSFORM_FEEDBACK_VARYINGS':  `Params'  returns the number of varying variables
-%% to capture in transform feedback mode for the program.
-%%
-%% `?GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH':  `Params'  returns the length of
-%% the longest variable name to be used for transform feedback, including the null-terminator.
-%% 
-%%
-%% `?GL_GEOMETRY_VERTICES_OUT':  `Params'  returns the maximum number of vertices
-%% that the geometry shader in  `Program'  will output.
-%%
-%% `?GL_GEOMETRY_INPUT_TYPE':  `Params'  returns a symbolic constant indicating the
-%% primitive type accepted as input to the geometry shader contained in  `Program' .
-%%
-%% `?GL_GEOMETRY_OUTPUT_TYPE':  `Params'  returns a symbolic constant indicating
-%% the primitive type that will be output by the geometry shader contained in  `Program' .
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetProgram.xhtml">external</a> documentation.
 -spec getProgramiv(Program, Pname) -> integer() when Program :: integer(),Pname :: enum().
 getProgramiv(Program,Pname) ->
   call(5460, <<Program:?GLuint,Pname:?GLenum>>).
@@ -11160,21 +4590,7 @@ getProgramiv(Program,Pname) ->
 %% The  information log for a program object is modified when the  program object is linked
 %% or validated. The string that is  returned will be null terminated.
 %%
-%% ``gl:getProgramInfoLog'' returns in   `InfoLog'  as much of the information log as
-%%  it can, up to a maximum of  `MaxLength'   characters. The number of characters actually
-%% returned,  excluding the null termination character, is specified by   `Length' . If
-%% the length of the returned  string is not required, a value of `?NULL' can  be passed
-%% in the  `Length'  argument. The  size of the buffer required to store the returned
-%% information  log can be obtained by calling   {@link gl:getProgramiv/2}   with the value `?GL_INFO_LOG_LENGTH'
-%% . 
-%%
-%% The information log for a program object is either an  empty string, or a string containing
-%% information about the last  link operation, or a string containing information about the
-%%  last validation operation. It may contain diagnostic messages,  warning messages, and
-%% other information. When a program object  is created, its information log will be a string
-%% of length  0.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramInfoLog.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetProgramInfoLog.xhtml">external</a> documentation.
 -spec getProgramInfoLog(Program, BufSize) -> string() when Program :: integer(),BufSize :: integer().
 getProgramInfoLog(Program,BufSize) ->
   call(5461, <<Program:?GLuint,BufSize:?GLsizei>>).
@@ -11184,28 +4600,7 @@ getProgramInfoLog(Program,BufSize) ->
 %% ``gl:getShader''  returns in  `Params'   the value of a parameter for a specific
 %% shader object. The  following parameters are defined:
 %%
-%% `?GL_SHADER_TYPE':  `Params'  returns   `?GL_VERTEX_SHADER' if    `Shader' 
-%%  is a vertex shader   object, `?GL_GEOMETRY_SHADER' if  `Shader'    is a geometry
-%% shader object, and `?GL_FRAGMENT_SHADER'   if  `Shader'  is a fragment   shader
-%% object.
-%%
-%% `?GL_DELETE_STATUS':  `Params'  returns   `?GL_TRUE' if    `Shader'  is
-%% currently flagged   for deletion, and `?GL_FALSE'   otherwise.
-%%
-%% `?GL_COMPILE_STATUS':  `Params'  returns   `?GL_TRUE' if the last compile
-%%   operation on  `Shader'  was   successful, and `?GL_FALSE'   otherwise.
-%%
-%% `?GL_INFO_LOG_LENGTH':  `Params'  returns the   number of characters in the information
-%% log for    `Shader'  including the null   termination character (i.e., the size of
-%% the   character buffer required to store the information   log). If  `Shader'  has
-%% no   information log, a value of 0 is returned.
-%%
-%% `?GL_SHADER_SOURCE_LENGTH':  `Params'  returns the   length of the concatenation
-%% of the source strings   that make up the shader source for the    `Shader' , including
-%% the null   termination character. (i.e., the size of the   character buffer required to
-%% store the shader   source). If no source code exists, 0 is   returned.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetShader.xhtml">external</a> documentation.
 -spec getShaderiv(Shader, Pname) -> integer() when Shader :: integer(),Pname :: enum().
 getShaderiv(Shader,Pname) ->
   call(5462, <<Shader:?GLuint,Pname:?GLenum>>).
@@ -11216,19 +4611,7 @@ getShaderiv(Shader,Pname) ->
 %% The information  log for a shader object is modified when the shader is compiled.  The
 %% string that is returned will be null terminated.
 %%
-%% ``gl:getShaderInfoLog'' returns in   `InfoLog'  as much of the information log as
-%%  it can, up to a maximum of  `MaxLength'   characters. The number of characters actually
-%% returned,  excluding the null termination character, is specified by   `Length' . If
-%% the length of the returned  string is not required, a value of `?NULL' can  be passed
-%% in the  `Length'  argument. The  size of the buffer required to store the returned
-%% information  log can be obtained by calling   {@link gl:getShaderiv/2}   with the value `?GL_INFO_LOG_LENGTH'
-%% .
-%%
-%% The information log for a shader object is a string that  may contain diagnostic messages,
-%% warning messages, and other  information about the last compile operation. When a shader
-%%  object is created, its information log will be a string of  length 0.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetShaderInfoLog.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetShaderInfoLog.xhtml">external</a> documentation.
 -spec getShaderInfoLog(Shader, BufSize) -> string() when Shader :: integer(),BufSize :: integer().
 getShaderInfoLog(Shader,BufSize) ->
   call(5463, <<Shader:?GLuint,BufSize:?GLsizei>>).
@@ -11240,15 +4623,7 @@ getShaderInfoLog(Shader,BufSize) ->
 %% are the result of a previous call to  {@link gl:shaderSource/2} . The string returned by
 %% the function will be null terminated.
 %%
-%% ``gl:getShaderSource'' returns in  `Source'  as much of the source code string as
-%% it can, up to a maximum of  `BufSize'  characters. The number of characters actually
-%% returned, excluding the null termination character, is specified by  `Length' . If
-%% the length of the returned string is not required, a value of `?NULL' can be passed
-%% in the  `Length'  argument. The size of the buffer required to store the returned source
-%% code string can be obtained by calling  {@link gl:getShaderiv/2}  with the value `?GL_SHADER_SOURCE_LENGTH'
-%% .
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetShaderSource.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetShaderSource.xhtml">external</a> documentation.
 -spec getShaderSource(Shader, BufSize) -> string() when Shader :: integer(),BufSize :: integer().
 getShaderSource(Shader,BufSize) ->
   call(5464, <<Shader:?GLuint,BufSize:?GLsizei>>).
@@ -11263,25 +4638,7 @@ getShaderSource(Shader,BufSize) ->
 %% in  `Program' , if  `Name'  starts with the reserved prefix "gl_", or if  `Name' 
 %% is associated with an atomic counter or a named uniform block.
 %%
-%% Uniform variables that are structures or arrays of structures may be queried by calling ``gl:getUniformLocation''
-%%  for each field within the structure. The array element operator "[]" and the structure
-%% field operator "." may be used in  `Name'  in order to select elements within an array
-%% or fields within a structure. The result of using these operators is not allowed to be
-%% another structure, an array of structures, or a subcomponent of a vector or a matrix.
-%% Except if the last part of  `Name'  indicates a uniform variable array, the location
-%% of the first element of an array can be retrieved by using the name of the array, or by
-%% using the name appended by "[0]".
-%%
-%% The actual locations assigned to uniform variables are not known until the program object
-%% is linked successfully. After linking has occurred, the command ``gl:getUniformLocation''
-%%  can be used to obtain the location of a uniform variable. This location value can then
-%% be passed to  {@link gl:uniform1f/2}  to set the value of the uniform variable or to  {@link gl:getUniformfv/2} 
-%%  in order to query the current value of the uniform variable. After a program object has
-%% been linked successfully, the index values for uniform variables remain fixed until the
-%% next link command occurs. Uniform variable locations and values can only be queried after
-%% a link if the link was successful.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetUniformLocation.xhtml">external</a> documentation.
 -spec getUniformLocation(Program, Name) -> integer() when Program :: integer(),Name :: string().
 getUniformLocation(Program,Name) ->
   NameLen = length(Name),
@@ -11300,15 +4657,7 @@ getUniformLocation(Program,Name) ->
 %% The values for uniform variables declared as a matrix will be returned in column major
 %% order.
 %%
-%% The locations assigned to uniform variables are not known until the program object is
-%% linked. After linking has occurred, the command  {@link gl:getUniformLocation/2}  can be
-%% used to obtain the location of a uniform variable. This location value can then be passed
-%% to ``gl:getUniform'' in order to query the current value of the uniform variable. After
-%% a program object has been linked successfully, the index values for uniform variables
-%% remain fixed until the next link command occurs. The uniform variable values can only
-%% be queried after a link if the link was successful.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniform.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetUniform.xhtml">external</a> documentation.
 -spec getUniformfv(Program, Location) -> matrix() when Program :: integer(),Location :: integer().
 getUniformfv(Program,Location) ->
   call(5466, <<Program:?GLuint,Location:?GLint>>).
@@ -11325,63 +4674,7 @@ getUniformiv(Program,Location) ->
 %% parameter. The generic vertex attribute to be queried is specified by  `Index' , and
 %% the parameter to be queried is specified by  `Pname' .
 %%
-%% The accepted parameter names are as follows:
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING':  `Params'  returns a single value, the
-%% name of the buffer object currently bound to the binding point corresponding to generic
-%% vertex attribute array   `Index' . If no buffer object is bound,  0 is returned. The
-%% initial value is 0.
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_ENABLED':  `Params'  returns a single value that is non-zero
-%% (true) if the vertex attribute array for  `Index'  is enabled and 0 (false) if it is
-%% disabled. The initial value is `?GL_FALSE'.
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_SIZE':  `Params'  returns a single value, the size of
-%% the vertex attribute array for  `Index' . The size is the number of values for each
-%% element of the vertex attribute array, and it will be 1, 2, 3, or 4. The initial value
-%% is 4.
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_STRIDE':  `Params'  returns a single value, the array
-%% stride for (number of bytes between successive elements in) the vertex attribute array
-%% for  `Index' . A value of 0 indicates that the array elements are stored sequentially
-%% in memory. The initial value is 0.
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_TYPE':  `Params'  returns a single value, a symbolic
-%% constant indicating the array type for the vertex attribute array for  `Index' . Possible
-%% values are `?GL_BYTE', `?GL_UNSIGNED_BYTE', `?GL_SHORT', `?GL_UNSIGNED_SHORT'
-%% , `?GL_INT', `?GL_UNSIGNED_INT', `?GL_FLOAT', and `?GL_DOUBLE'. The
-%% initial value is `?GL_FLOAT'.
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_NORMALIZED':  `Params'  returns a single value that is
-%% non-zero (true) if fixed-point data types for the vertex attribute array indicated by  `Index' 
-%%  are normalized when they are converted to floating point, and 0 (false) otherwise. The
-%% initial value is `?GL_FALSE'.
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_INTEGER':  `Params'  returns a single value that is non-zero
-%% (true) if fixed-point data types for the vertex attribute array indicated by  `Index' 
-%% have integer data types, and 0 (false) otherwise. The initial value is 0 (`?GL_FALSE').
-%% 
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_DIVISOR':  `Params'  returns a single value that is the
-%% frequency divisor used for instanced rendering. See  {@link gl:vertexAttribDivisor/2} . The
-%% initial value is 0.
-%%
-%% `?GL_CURRENT_VERTEX_ATTRIB':  `Params'  returns four values that represent the
-%% current value for the generic vertex attribute specified by index. Generic vertex attribute
-%% 0 is unique in that it has no current state, so an error will be generated if  `Index' 
-%% is 0. The initial value for all other generic vertex attributes is (0,0,0,1).
-%%
-%% ``gl:getVertexAttribdv'' and ``gl:getVertexAttribfv'' return the current attribute
-%% values as four single-precision floating-point values; ``gl:getVertexAttribiv'' reads
-%% them as floating-point values and converts them to four integer values; ``gl:getVertexAttribIiv''
-%%  and ``gl:getVertexAttribIuiv'' read and return them as signed or unsigned integer values,
-%% respectively; ``gl:getVertexAttribLdv'' reads and returns them as four double-precision
-%% floating-point values. 
-%%
-%% All of the parameters except `?GL_CURRENT_VERTEX_ATTRIB' represent state stored in
-%% the currently bound vertex array object.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetVertexAttrib.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetVertexAttrib.xhtml">external</a> documentation.
 -spec getVertexAttribdv(Index, Pname) -> {float(),float(),float(),float()} when Index :: integer(),Pname :: enum().
 getVertexAttribdv(Index,Pname) ->
   call(5468, <<Index:?GLuint,Pname:?GLenum>>).
@@ -11405,7 +4698,7 @@ getVertexAttribiv(Index,Pname) ->
 %% . If  `Program'  is zero or a non-zero value that is not the name of a program object,
 %% or if an error occurs,  ``gl:isProgram'' returns `?GL_FALSE'.
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsProgram.xhtml">external</a> documentation.
 -spec isProgram(Program) -> 0|1 when Program :: integer().
 isProgram(Program) ->
   call(5471, <<Program:?GLuint>>).
@@ -11417,7 +4710,7 @@ isProgram(Program) ->
 %% .  If  `Shader'  is zero or a non-zero value that is not the name of a shader object,
 %% or if an error occurs, ``gl:isShader '' returns `?GL_FALSE'.
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsShader.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsShader.xhtml">external</a> documentation.
 -spec isShader(Shader) -> 0|1 when Shader :: integer().
 isShader(Shader) ->
   call(5472, <<Shader:?GLuint>>).
@@ -11433,111 +4726,7 @@ isShader(Shader) ->
 %% they will be used to create an executable that will run on the programmable fragment processor.
 %% 
 %%
-%% The status of the link operation will be stored as part of the program object's state.
-%% This value will be set to `?GL_TRUE' if the program object was linked without errors
-%% and is ready for use, and `?GL_FALSE' otherwise. It can be queried by calling  {@link gl:getProgramiv/2} 
-%%  with arguments  `Program'  and `?GL_LINK_STATUS'.
-%%
-%% As a result of a successful link operation, all active user-defined uniform variables
-%% belonging to  `Program'  will be initialized to 0, and each of the program object's
-%% active uniform variables will be assigned a location that can be queried by calling  {@link gl:getUniformLocation/2} 
-%% . Also, any active user-defined attribute variables that have not been bound to a generic
-%% vertex attribute index will be bound to one at this time.
-%%
-%% Linking of a program object can fail for a number of reasons as specified in the `OpenGL Shading Language Specification'
-%% . The following lists some of the conditions that will cause a link error.
-%%
-%% The number of active attribute variables supported by the implementation has been exceeded.
-%% 
-%%
-%% The storage limit for uniform variables has been exceeded.
-%%
-%% The number of active uniform variables supported by the implementation has been exceeded.
-%%
-%% The `main' function is missing for the vertex, geometry or fragment shader.
-%%
-%% A varying variable actually used in the fragment shader is not declared in the same way
-%% (or is not declared at all) in the vertex shader, or geometry shader shader if present.
-%%
-%% A reference to a function or variable name is unresolved.
-%%
-%% A shared global is declared with two different types or two different initial values.
-%%
-%% One or more of the attached shader objects has not been successfully compiled.
-%%
-%% Binding a generic attribute matrix caused some rows of the matrix to fall outside the
-%% allowed maximum of `?GL_MAX_VERTEX_ATTRIBS'.
-%%
-%% Not enough contiguous vertex attribute slots could be found to bind attribute matrices.
-%%
-%% The program object contains objects to form a fragment shader but does not contain objects
-%% to form a vertex shader.
-%%
-%% The program object contains objects to form a geometry shader but does not contain objects
-%% to form a vertex shader.
-%%
-%% The program object contains objects to form a geometry shader and the input primitive
-%% type, output primitive type, or maximum output vertex count is not specified in any compiled
-%% geometry shader object.
-%%
-%% The program object contains objects to form a geometry shader and the input primitive
-%% type, output primitive type, or maximum output vertex count is specified differently in
-%% multiple geometry shader objects.
-%%
-%% The number of active outputs in the fragment shader is greater than the value of `?GL_MAX_DRAW_BUFFERS'
-%% .
-%%
-%% The program has an active output assigned to a location greater than or equal to the value
-%% of `?GL_MAX_DUAL_SOURCE_DRAW_BUFFERS' and has an active output assigned an index
-%% greater than or equal to one.
-%%
-%% More than one varying out variable is bound to the same number and index.
-%%
-%% The explicit binding assigments do not leave enough space for the linker to automatically
-%% assign a location for a varying out array, which requires multiple contiguous locations.
-%%
-%% The  `Count'  specified by  {@link gl:transformFeedbackVaryings/3}  is non-zero, but the
-%% program object has no vertex or geometry shader.
-%%
-%% Any variable name specified to  {@link gl:transformFeedbackVaryings/3}  in the  `Varyings' 
-%%  array is not declared as an output in the vertex shader (or the geometry shader, if active).
-%% 
-%%
-%% Any two entries in the  `Varyings'  array given  {@link gl:transformFeedbackVaryings/3} 
-%% specify the same varying variable.
-%%
-%% The total number of components to capture in any transform feedback varying variable is
-%% greater than the constant `?GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS' and the
-%% buffer mode is `?SEPARATE_ATTRIBS'.
-%%
-%% When a program object has been successfully linked, the program object can be made part
-%% of current state by calling  {@link gl:useProgram/1} . Whether or not the link operation
-%% was successful, the program object's information log will be overwritten. The information
-%% log can be retrieved by calling  {@link gl:getProgramInfoLog/2} .
-%%
-%% ``gl:linkProgram'' will also install the generated executables as part of the current
-%% rendering state if the link operation was successful and the specified program object
-%% is already currently in use as a result of a previous call to  {@link gl:useProgram/1} .
-%% If the program object currently in use is relinked unsuccessfully, its link status will
-%% be set to `?GL_FALSE' , but the executables and associated state will remain part
-%% of the current state until a subsequent call to ``gl:useProgram'' removes it from use.
-%% After it is removed from use, it cannot be made part of current state until it has been
-%% successfully relinked.
-%%
-%% If  `Program'  contains shader objects of type `?GL_VERTEX_SHADER', and optionally
-%% of type `?GL_GEOMETRY_SHADER', but does not contain shader objects of type `?GL_FRAGMENT_SHADER'
-%% , the vertex shader executable will be installed on the programmable vertex processor,
-%% the geometry shader executable, if present, will be installed on the programmable geometry
-%% processor, but no executable will be installed on the fragment processor. The results
-%% of rasterizing primitives with such a program will be undefined.
-%%
-%% The program object's information log is updated and the program is generated at the time
-%% of the link operation. After the link operation, applications are free to modify attached
-%% shader objects, compile attached shader objects, detach shader objects, delete shader
-%% objects, and attach additional shader objects. None of these operations affects the information
-%% log or the program that is part of the program object.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLinkProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glLinkProgram.xhtml">external</a> documentation.
 -spec linkProgram(Program) -> 'ok' when Program :: integer().
 linkProgram(Program) ->
   cast(5473, <<Program:?GLuint>>).
@@ -11555,7 +4744,7 @@ linkProgram(Program) ->
 %% than 0 to indicate  that the string is null terminated. The source code strings are  not
 %% scanned or parsed at this time; they are simply copied into  the specified shader object.
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glShaderSource.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glShaderSource.xhtml">external</a> documentation.
 -spec shaderSource(Shader, String) -> 'ok' when Shader :: integer(),String :: iolist().
 shaderSource(Shader,String) ->
   StringTemp = list_to_binary([[Str|[0]] || Str <- String ]),
@@ -11570,35 +4759,7 @@ shaderSource(Shader,String) ->
 %% compiling the shader objects with   {@link gl:compileShader/1} ,  and successfully linking
 %% the program object with   {@link gl:linkProgram/1} .  
 %%
-%% A program object will contain an executable that will run  on the vertex processor if
-%% it contains one or more shader  objects of type `?GL_VERTEX_SHADER' that have  been
-%% successfully compiled and linked. A program object will contain an  executable that will
-%% run on the geometry processor if it contains one or  more shader objects of type `?GL_GEOMETRY_SHADER'
-%%  that  have been successfully compiled and linked.  Similarly, a program object will contain
-%% an executable that will run on the  fragment processor if it contains one or more shader
-%% objects of type  `?GL_FRAGMENT_SHADER' that have been  successfully compiled and
-%% linked.
-%%
-%% While a program object is in use, applications are free to  modify attached shader objects,
-%% compile attached shader objects,  attach additional shader objects, and detach or delete
-%% shader  objects. None of these operations will affect the executables  that are part of
-%% the current state. However, relinking the  program object that is currently in use will
-%% install the program  object as part of the current rendering state if the link  operation
-%% was successful (see   {@link gl:linkProgram/1}   ). If the program object currently in use
-%% is relinked  unsuccessfully, its link status will be set to  `?GL_FALSE', but the
-%% executables and  associated state will remain part of the current state until a  subsequent
-%% call to ``gl:useProgram'' removes it  from use. After it is removed from use, it cannot
-%% be made part  of current state until it has been successfully relinked.
-%%
-%% If  `Program'  is zero, then the current rendering  state refers to an `invalid'
-%% program object and the  results of shader execution are undefined. However, this is not
-%% an error.
-%%
-%% If  `Program'  does not  contain shader objects of type `?GL_FRAGMENT_SHADER',
-%% an  executable will be installed on the vertex, and possibly geometry processors,  but
-%% the results of fragment shader execution will be undefined.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glUseProgram.xhtml">external</a> documentation.
 -spec useProgram(Program) -> 'ok' when Program :: integer().
 useProgram(Program) ->
   cast(5475, <<Program:?GLuint>>).
@@ -11611,62 +4772,7 @@ useProgram(Program) ->
 %% on the program object that was made part of current state by calling  {@link gl:useProgram/1} 
 %% .
 %%
-%% The commands ``gl:uniform{1|2|3|4}{f|i|ui}'' are used to change the value of the uniform
-%% variable specified by  `Location'  using the values passed as arguments. The number
-%% specified in the command should match the number of components in the data type of the
-%% specified uniform variable (e.g., `1' for float, int, unsigned int, bool; `2'
-%% for vec2, ivec2, uvec2, bvec2, etc.). The suffix `f' indicates that floating-point
-%% values are being passed; the suffix `i' indicates that integer values are being passed;
-%% the suffix `ui' indicates that unsigned integer values are being passed, and this
-%% type should also match the data type of the specified uniform variable. The `i' variants
-%% of this function should be used to provide values for uniform variables defined as int, ivec2
-%% , ivec3, ivec4, or arrays of these. The `ui' variants of this function should be
-%% used to provide values for uniform variables defined as unsigned int, uvec2, uvec3, uvec4,
-%% or arrays of these. The `f' variants should be used to provide values for uniform
-%% variables of type float, vec2, vec3, vec4, or arrays of these. Either the `i', `ui'
-%%  or `f' variants may be used to provide values for uniform variables of type bool, bvec2
-%% , bvec3, bvec4, or arrays of these. The uniform variable will be set to false if the input
-%% value is 0 or 0.0f, and it will be set to true otherwise.
-%%
-%% All active uniform variables defined in a program object are initialized to 0 when the
-%% program object is linked successfully. They retain the values assigned to them by a call
-%% to ``gl:uniform '' until the next successful link operation occurs on the program object,
-%% when they are once again initialized to 0.
-%%
-%% The commands ``gl:uniform{1|2|3|4}{f|i|ui}v'' can be used to modify a single uniform
-%% variable or a uniform variable array. These commands pass a count and a pointer to the
-%% values to be loaded into a uniform variable or a uniform variable array. A count of 1
-%% should be used if modifying the value of a single uniform variable, and a count of 1 or
-%% greater can be used to modify an entire array or part of an array. When loading `n'
-%% elements starting at an arbitrary position `m' in a uniform variable array, elements
-%% `m' + `n' - 1 in the array will be replaced with the new values. If  `M'  +  `N' 
-%%  - 1 is larger than the size of the uniform variable array, values for all array elements
-%% beyond the end of the array will be ignored. The number specified in the name of the command
-%% indicates the number of components for each element in  `Value' , and it should match
-%% the number of components in the data type of the specified uniform variable (e.g., `1'
-%%  for float, int, bool; `2' for vec2, ivec2, bvec2, etc.). The data type specified
-%% in the name of the command must match the data type for the specified uniform variable
-%% as described previously for ``gl:uniform{1|2|3|4}{f|i|ui}''.
-%%
-%% For uniform variable arrays, each element of the array is considered to be of the type
-%% indicated in the name of the command (e.g., ``gl:uniform3f'' or ``gl:uniform3fv''
-%% can be used to load a uniform variable array of type vec3). The number of elements of
-%% the uniform variable array to be modified is specified by  `Count' 
-%%
-%% The commands ``gl:uniformMatrix{2|3|4|2x3|3x2|2x4|4x2|3x4|4x3}fv''  are used to modify
-%% a matrix or an array of matrices. The numbers in the command name are interpreted as the
-%% dimensionality of the matrix. The number `2' indicates a 2 × 2 matrix (i.e., 4 values),
-%% the number `3' indicates a 3 × 3 matrix (i.e., 9 values), and the number `4'
-%% indicates a 4 × 4 matrix (i.e., 16 values). Non-square matrix dimensionality is explicit,
-%% with the first number representing the number of columns and the second number representing
-%% the number of rows. For example,  `2x4' indicates a 2 × 4 matrix with 2 columns and
-%% 4 rows (i.e., 8 values). If  `Transpose'  is `?GL_FALSE', each matrix is assumed
-%% to be supplied in column major order. If  `Transpose'  is `?GL_TRUE', each matrix
-%% is assumed to be supplied in row major order. The  `Count'  argument indicates the
-%% number of matrices to be passed. A count of 1 should be used if modifying the value of
-%% a single matrix, and a count greater than 1 can be used to modify an array of matrices.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glUniform.xhtml">external</a> documentation.
 -spec uniform1f(Location, V0) -> 'ok' when Location :: integer(),V0 :: float().
 uniform1f(Location,V0) ->
   cast(5476, <<Location:?GLint,V0:?GLfloat>>).
@@ -11811,19 +4917,7 @@ uniformMatrix4fv(Location,Transpose,Value) ->
 %% a way for OpenGL  implementers to convey more information about why the current  program
 %% is inefficient, suboptimal, failing to execute, and so  on.
 %%
-%% The status of the validation operation will be stored as  part of the program object's
-%% state. This value will be set to  `?GL_TRUE' if the validation succeeded, and  `?GL_FALSE'
-%%  otherwise. It can be queried by  calling   {@link gl:getProgramiv/2}   with arguments  `Program' 
-%%  and  `?GL_VALIDATE_STATUS'. If validation is  successful,  `Program'  is guaranteed
-%% to  execute given the current state. Otherwise,   `Program'  is guaranteed to not execute.
-%% 
-%%
-%% This function is typically useful only during application  development. The informational
-%% string stored in the information  log is completely implementation dependent; therefore,
-%% an  application should not expect different OpenGL implementations  to produce identical
-%% information strings.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glValidateProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glValidateProgram.xhtml">external</a> documentation.
 -spec validateProgram(Program) -> 'ok' when Program :: integer().
 validateProgram(Program) ->
   cast(5495, <<Program:?GLuint>>).
@@ -11833,72 +4927,7 @@ validateProgram(Program) ->
 %% The ``gl:vertexAttrib'' family of entry points allows an application to pass generic
 %% vertex attributes in numbered locations.
 %%
-%% Generic attributes are defined as four-component values that are organized into an array.
-%% The first entry of this array is numbered 0, and the size of the array is specified by
-%% the implementation-dependent constant `?GL_MAX_VERTEX_ATTRIBS'. Individual elements
-%% of this array can be modified with a ``gl:vertexAttrib'' call that specifies the index
-%% of the element to be modified and a value for that element.
-%%
-%% These commands can be used to specify one, two, three, or all four components of the generic
-%% vertex attribute specified by  `Index' . A `1' in the name of the command indicates
-%% that only one value is passed, and it will be used to modify the first component of the
-%% generic vertex attribute. The second and third components will be set to 0, and the fourth
-%% component will be set to 1. Similarly, a `2' in the name of the command indicates
-%% that values are provided for the first two components, the third component will be set
-%% to 0, and the fourth component will be set to 1. A `3' in the name of the command
-%% indicates that values are provided for the first three components and the fourth component
-%% will be set to 1, whereas a `4' in the name indicates that values are provided for
-%% all four components.
-%%
-%% The letters `s', `f', `i', `d', `ub', `us', and `ui'
-%% indicate whether the arguments are of type short, float, int, double, unsigned byte, unsigned
-%% short, or unsigned int. When `v' is appended to the name, the commands can take a
-%% pointer to an array of such values.
-%%
-%% Additional capitalized letters can indicate further alterations to the default behavior
-%% of the glVertexAttrib function:
-%%
-%%  The commands containing `N' indicate that  the arguments will be passed as fixed-point
-%% values that are  scaled to a normalized range according to the component  conversion rules
-%% defined by the OpenGL specification. Signed values are understood to represent fixed-point
-%% values in the range [-1,1], and unsigned values are understood to represent fixed-point
-%% values in the range [0,1]. 
-%%
-%%  The commands containing `I' indicate that  the arguments are extended to full signed
-%% or unsigned integers. 
-%%
-%%  The commands containing `P' indicate that  the arguments are stored as packed components
-%% within a larger natural type. 
-%%
-%%  The commands containing `L' indicate that the arguments are full 64-bit quantities
-%% and should be passed directly to shader inputs declared as 64-bit double precision types.
-%% 
-%%
-%% OpenGL Shading Language attribute variables are allowed to be of type mat2, mat3, or mat4.
-%% Attributes of these types may be loaded using the ``gl:vertexAttrib'' entry points.
-%% Matrices must be loaded into successive generic attribute slots in column major order,
-%% with one column of the matrix in each generic attribute slot.
-%%
-%% A user-defined attribute variable declared in a vertex shader can be bound to a generic
-%% attribute index by calling  {@link gl:bindAttribLocation/3} . This allows an application
-%% to use more descriptive variable names in a vertex shader. A subsequent change to the
-%% specified generic vertex attribute will be immediately reflected as a change to the corresponding
-%% attribute variable in the vertex shader.
-%%
-%% The binding between a generic vertex attribute index and a user-defined attribute variable
-%% in a vertex shader is part of the state of a program object, but the current value of
-%% the generic vertex attribute is not. The value of each generic vertex attribute is part
-%% of current state, just like standard vertex attributes, and it is maintained even if a
-%% different program object is used.
-%%
-%% An application may freely modify generic vertex attributes that are not bound to a named
-%% vertex shader attribute variable. These values are simply maintained as part of current
-%% state and will not be accessed by the vertex shader. If a generic vertex attribute bound
-%% to an attribute variable in a vertex shader is not updated while the vertex shader is
-%% executing, the vertex shader will repeatedly use the current value for the generic vertex
-%% attribute.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttrib.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glVertexAttrib.xhtml">external</a> documentation.
 -spec vertexAttrib1d(Index, X) -> 'ok' when Index :: integer(),X :: float().
 vertexAttrib1d(Index,X) ->
   cast(5496, <<Index:?GLuint,0:32,X:?GLdouble>>).
@@ -12096,37 +5125,7 @@ vertexAttrib4usv(Index,{V1,V2,V3,V4}) ->
 %% and  `Stride'  specifies the byte stride from one attribute to the next, allowing vertices
 %% and attributes to be packed into a single array or stored in separate arrays. 
 %%
-%%  For ``gl:vertexAttribPointer'', if  `Normalized'  is set to `?GL_TRUE', it
-%% indicates that values stored in an integer format are to be mapped to the range [-1,1]
-%% (for signed values) or [0,1] (for unsigned values) when they are accessed and converted
-%% to floating point. Otherwise, values will be converted to floats directly without normalization.
-%% 
-%%
-%%  For ``gl:vertexAttribIPointer'', only the integer types `?GL_BYTE', `?GL_UNSIGNED_BYTE'
-%% , `?GL_SHORT', `?GL_UNSIGNED_SHORT', `?GL_INT', `?GL_UNSIGNED_INT'
-%% are accepted. Values are always left as integer values. 
-%%
-%% ``gl:vertexAttribLPointer'' specifies state for a generic vertex attribute array associated
-%% with a shader attribute variable declared with 64-bit double precision components.  `Type' 
-%%  must be `?GL_DOUBLE'.  `Index' ,  `Size' , and  `Stride'  behave as described
-%% for ``gl:vertexAttribPointer'' and ``gl:vertexAttribIPointer''. 
-%%
-%%  If  `Pointer'  is not NULL, a non-zero named buffer object must be bound to the `?GL_ARRAY_BUFFER'
-%%  target (see  {@link gl:bindBuffer/2} ), otherwise an error is generated.  `Pointer' 
-%% is treated as a byte offset into the buffer object's data store. The buffer object binding
-%% (`?GL_ARRAY_BUFFER_BINDING') is saved as generic vertex attribute array state (`?GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING'
-%% ) for index  `Index' . 
-%%
-%%  When a generic vertex attribute array is specified,  `Size' ,  `Type' ,  `Normalized' 
-%% ,  `Stride' , and  `Pointer'  are saved as vertex array state, in addition to the
-%% current vertex array buffer object binding. 
-%%
-%%  To enable and disable a generic vertex attribute array, call  {@link gl:disableVertexAttribArray/1} 
-%%  and  {@link gl:disableVertexAttribArray/1}  with  `Index' . If enabled, the generic vertex
-%% attribute array is used when  {@link gl:drawArrays/3} ,  {@link gl:multiDrawArrays/3} ,  {@link gl:drawElements/4} 
-%% , see `glMultiDrawElements', or  {@link gl:drawRangeElements/6}  is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glVertexAttribPointer.xhtml">external</a> documentation.
 -spec vertexAttribPointer(Index, Size, Type, Normalized, Stride, Pointer) -> 'ok' when Index :: integer(),Size :: integer(),Type :: enum(),Normalized :: 0|1,Stride :: integer(),Pointer :: offset()|mem().
 vertexAttribPointer(Index,Size,Type,Normalized,Stride,Pointer) when  is_integer(Pointer) ->
   cast(5519, <<Index:?GLuint,Size:?GLint,Type:?GLenum,Normalized:?GLboolean,0:24,Stride:?GLsizei,Pointer:?GLuint>>);
@@ -12184,7 +5183,7 @@ uniformMatrix4x3fv(Location,Transpose,Value) ->
 
 %% @doc glColorMaski
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glColorMaski.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec colorMaski(Index, R, G, B, A) -> 'ok' when Index :: integer(),R :: 0|1,G :: 0|1,B :: 0|1,A :: 0|1.
 colorMaski(Index,R,G,B,A) ->
   cast(5527, <<Index:?GLuint,R:?GLboolean,G:?GLboolean,B:?GLboolean,A:?GLboolean>>).
@@ -12209,14 +5208,14 @@ enablei(Target,Index) ->
 
 %% @doc glEnablei
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glEnablei.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec disablei(Target, Index) -> 'ok' when Target :: enum(),Index :: integer().
 disablei(Target,Index) ->
   cast(5531, <<Target:?GLenum,Index:?GLuint>>).
 
 %% @doc glIsEnabledi
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsEnabledi.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec isEnabledi(Target, Index) -> 0|1 when Target :: enum(),Index :: integer().
 isEnabledi(Target,Index) ->
   call(5532, <<Target:?GLenum,Index:?GLuint>>).
@@ -12228,23 +5227,7 @@ isEnabledi(Target,Index) ->
 %% a call to ``gl:beginTransformFeedback'' until a subsequent call to  {@link gl:beginTransformFeedback/1} 
 %% . Transform feedback commands must be paired. 
 %%
-%%  If no geometry shader is present, while transform feedback is active the  `Mode' 
-%% parameter to  {@link gl:drawArrays/3}  must match those specified in the following table: <table>
-%% <tbody><tr><td>` Transform Feedback ' `PrimitiveMode' </td><td>` Allowed Render Primitive '
-%%  `Modes' </td></tr></tbody><tbody><tr><td>`?GL_POINTS'</td><td>`?GL_POINTS'</td>
-%% </tr><tr><td>`?GL_LINES'</td><td>`?GL_LINES', `?GL_LINE_LOOP', `?GL_LINE_STRIP'
-%% , `?GL_LINES_ADJACENCY', `?GL_LINE_STRIP_ADJACENCY'</td></tr><tr><td>`?GL_TRIANGLES'
-%% </td><td>`?GL_TRIANGLES', `?GL_TRIANGLE_STRIP', `?GL_TRIANGLE_FAN', `?GL_TRIANGLES_ADJACENCY'
-%% , `?GL_TRIANGLE_STRIP_ADJACENCY'</td></tr></tbody></table>
-%%
-%%  If a geometry shader is present, the output primitive type from the geometry shader must
-%% match those provided in the following table: <table><tbody><tr><td>` Transform Feedback '
-%%  `PrimitiveMode' </td><td>` Allowed Geometry Shader Output Primitive Type '</td></tr>
-%% </tbody><tbody><tr><td>`?GL_POINTS'</td><td>`?points'</td></tr><tr><td>`?GL_LINES'
-%% </td><td>`?line_strip'</td></tr><tr><td>`?GL_TRIANGLES'</td><td>`?triangle_strip'
-%% </td></tr></tbody></table>
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBeginTransformFeedback.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBeginTransformFeedback.xhtml">external</a> documentation.
 -spec beginTransformFeedback(PrimitiveMode) -> 'ok' when PrimitiveMode :: enum().
 beginTransformFeedback(PrimitiveMode) ->
   cast(5533, <<PrimitiveMode:?GLenum>>).
@@ -12265,11 +5248,7 @@ endTransformFeedback() ->
 %% a range of  `Buffer'  to the indexed buffer binding target, ``gl:bindBufferBase''
 %% also binds the range to the generic buffer binding point specified by  `Target' . 
 %%
-%%  `Offset'  specifies the offset in basic machine units into the buffer object  `Buffer' 
-%%  and  `Size'  specifies the amount of data that can be read from the buffer object
-%% while used as an indexed target. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindBufferRange.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindBufferRange.xhtml">external</a> documentation.
 -spec bindBufferRange(Target, Index, Buffer, Offset, Size) -> 'ok' when Target :: enum(),Index :: integer(),Buffer :: integer(),Offset :: integer(),Size :: integer().
 bindBufferRange(Target,Index,Buffer,Offset,Size) ->
   cast(5535, <<Target:?GLenum,Index:?GLuint,Buffer:?GLuint,0:32,Offset:?GLintptr,Size:?GLsizeiptr>>).
@@ -12284,7 +5263,7 @@ bindBufferRange(Target,Index,Buffer,Offset,Size) ->
 %% binding target, ``gl:bindBufferBase'' also binds  `Buffer'  to the generic buffer
 %% binding point specified by  `Target' . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindBufferBase.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindBufferBase.xhtml">external</a> documentation.
 -spec bindBufferBase(Target, Index, Buffer) -> 'ok' when Target :: enum(),Index :: integer(),Buffer :: integer().
 bindBufferBase(Target,Index,Buffer) ->
   cast(5536, <<Target:?GLenum,Index:?GLuint,Buffer:?GLuint>>).
@@ -12297,32 +5276,7 @@ bindBufferBase(Target,Index,Buffer) ->
 %% from the emitted vertices. Otherwise, the values of the selected vertex shader outputs
 %% are recorded. 
 %%
-%%  The state set by ``gl:tranformFeedbackVaryings'' is stored and takes effect next time  {@link gl:linkProgram/1} 
-%%  is called on  `Program' . When  {@link gl:linkProgram/1}  is called,  `Program'  is
-%% linked so that the values of the specified varying variables for the vertices of each
-%% primitive generated by the GL are written to a single buffer object if  `BufferMode' 
-%% is `?GL_INTERLEAVED_ATTRIBS' or multiple buffer objects if  `BufferMode'  is `?GL_SEPARATE_ATTRIBS'
-%% . 
-%%
-%%  In addition to the errors generated by ``gl:transformFeedbackVaryings'', the program  `Program' 
-%%  will fail to link if: 
-%%
-%%  The count specified by ``gl:transformFeedbackVaryings'' is non-zero, but the program
-%% object has no vertex or geometry shader. 
-%%
-%%  Any variable name specified in the  `Varyings'  array is not declared as an output
-%% in the vertex shader (or the geometry shader, if active). 
-%%
-%%  Any two entries in the  `Varyings'  array specify the same varying variable. 
-%%
-%%  The total number of components to capture in any varying variable in  `Varyings' 
-%% is greater than the constant `?GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS' and
-%% the buffer mode is `?GL_SEPARATE_ATTRIBS'. 
-%%
-%%  The total number of components to capture is greater than the constant `?GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS'
-%%  and the buffer mode is `?GL_INTERLEAVED_ATTRIBS'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTransformFeedbackVaryings.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTransformFeedbackVaryings.xhtml">external</a> documentation.
 -spec transformFeedbackVaryings(Program, Varyings, BufferMode) -> 'ok' when Program :: integer(),Varyings :: iolist(),BufferMode :: enum().
 transformFeedbackVaryings(Program,Varyings,BufferMode) ->
   VaryingsTemp = list_to_binary([[Str|[0]] || Str <- Varyings ]),
@@ -12338,26 +5292,7 @@ transformFeedbackVaryings(Program,Varyings,BufferMode) ->
 %% the  `Varyings'  array passed to  {@link gl:transformFeedbackVaryings/3} , and an  `Index' 
 %%  of `?GL_TRANSFORM_FEEDBACK_VARYINGS-1' selects the last such variable. 
 %%
-%%  The name of the selected varying is returned as a null-terminated string in  `Name' .
-%% The actual number of characters written into  `Name' , excluding the null terminator,
-%% is returned in  `Length' . If  `Length'  is NULL, no length is returned. The maximum
-%% number of characters that may be written into  `Name' , including the null terminator,
-%% is specified by  `BufSize' . 
-%%
-%%  The length of the longest varying name in program is given by `?GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH'
-%% , which can be queried with  {@link gl:getProgramiv/2} . 
-%%
-%%  For the selected varying variable, its type is returned into  `Type' . The size of
-%% the varying is returned into  `Size' . The value in  `Size'  is in units of the
-%% type returned in  `Type' . The type returned can be any of the scalar, vector, or matrix
-%% attribute types returned by  {@link gl:getActiveAttrib/3} . If an error occurred, the return
-%% parameters  `Length' ,  `Size' ,  `Type'  and  `Name'  will be unmodified.
-%% This command will return as much information about the varying variables as possible.
-%% If no information is available,  `Length'  will be set to zero and  `Name'  will
-%% be an empty string. This situation could arise if ``gl:getTransformFeedbackVarying''
-%% is called after a failed link. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTransformFeedbackVarying.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetTransformFeedbackVarying.xhtml">external</a> documentation.
 -spec getTransformFeedbackVarying(Program, Index, BufSize) -> {Size :: integer(),Type :: enum(),Name :: string()} when Program :: integer(),Index :: integer(),BufSize :: integer().
 getTransformFeedbackVarying(Program,Index,BufSize) ->
   call(5538, <<Program:?GLuint,Index:?GLuint,BufSize:?GLsizei>>).
@@ -12372,7 +5307,7 @@ getTransformFeedbackVarying(Program,Index,BufSize) ->
 %% is disabled. If  `Clamp'  is `?GL_FIXED_ONLY', read color clamping is enabled
 %% only if the selected read buffer has fixed point components and disabled otherwise. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClampColor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClampColor.xhtml">external</a> documentation.
 -spec clampColor(Target, Clamp) -> 'ok' when Target :: enum(),Clamp :: enum().
 clampColor(Target,Clamp) ->
   cast(5539, <<Target:?GLenum,Clamp:?GLenum>>).
@@ -12393,18 +5328,7 @@ clampColor(Target,Clamp) ->
 %%  is `?GL_QUERY_NO_WAIT', the GL may choose to unconditionally execute the subsequent
 %% rendering commands without waiting for the query to complete. 
 %%
-%%  If  `Mode'  is `?GL_QUERY_BY_REGION_WAIT', the GL will also wait for occlusion
-%% query results and discard rendering commands if the result of the occlusion query is zero.
-%% If the query result is non-zero, subsequent rendering commands are executed, but the GL
-%% may discard the results of the commands for any region of the framebuffer that did not
-%% contribute to the sample count in the specified occlusion query. Any such discarding is
-%% done in an implementation-dependent manner, but the rendering command results may not
-%% be discarded for any samples that contributed to the occlusion query sample count. If  `Mode' 
-%%  is `?GL_QUERY_BY_REGION_NO_WAIT', the GL operates as in `?GL_QUERY_BY_REGION_WAIT'
-%% , but may choose to unconditionally execute the subsequent rendering commands without
-%% waiting for the query to complete. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBeginConditionalRender.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBeginConditionalRender.xhtml">external</a> documentation.
 -spec beginConditionalRender(Id, Mode) -> 'ok' when Id :: integer(),Mode :: enum().
 beginConditionalRender(Id,Mode) ->
   cast(5540, <<Id:?GLuint,Mode:?GLenum>>).
@@ -12417,7 +5341,7 @@ endConditionalRender() ->
 
 %% @doc glVertexAttribIPointer
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribIPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexAttribIPointer(Index, Size, Type, Stride, Pointer) -> 'ok' when Index :: integer(),Size :: integer(),Type :: enum(),Stride :: integer(),Pointer :: offset()|mem().
 vertexAttribIPointer(Index,Size,Type,Stride,Pointer) when  is_integer(Pointer) ->
   cast(5542, <<Index:?GLuint,Size:?GLint,Type:?GLenum,Stride:?GLsizei,Pointer:?GLuint>>);
@@ -12433,7 +5357,7 @@ getVertexAttribIiv(Index,Pname) ->
 
 %% @doc glGetVertexAttribI
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetVertexAttribI.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getVertexAttribIuiv(Index, Pname) -> {integer(),integer(),integer(),integer()} when Index :: integer(),Pname :: enum().
 getVertexAttribIuiv(Index,Pname) ->
   call(5545, <<Index:?GLuint,Pname:?GLenum>>).
@@ -12556,21 +5480,7 @@ getUniformuiv(Program,Location) ->
 %% .  `Name'  must be a null-terminated string.  `ColorNumber'  must be less than `?GL_MAX_DRAW_BUFFERS'
 %% . 
 %%
-%%  The bindings specified by ``gl:bindFragDataLocation'' have no effect until  `Program' 
-%%  is next linked. Bindings may be specified at any time after  `Program'  has been created.
-%% Specifically, they may be specified before shader objects are attached to the program.
-%% Therefore, any name may be specified in  `Name' , including a name that is never used
-%% as a varying out variable in any fragment shader object. Names beginning with `?gl_'
-%% are reserved by the GL. 
-%%
-%%  In addition to the errors generated by ``gl:bindFragDataLocation'', the program  `Program' 
-%%  will fail to link if: 
-%%
-%%  The number of active outputs is greater than the value `?GL_MAX_DRAW_BUFFERS'. 
-%%
-%%  More than one varying out variable is bound to the same color number. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindFragDataLocation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindFragDataLocation.xhtml">external</a> documentation.
 -spec bindFragDataLocation(Program, Color, Name) -> 'ok' when Program :: integer(),Color :: integer(),Name :: string().
 bindFragDataLocation(Program,Color,Name) ->
   NameLen = length(Name),
@@ -12584,7 +5494,7 @@ bindFragDataLocation(Program,Color,Name) ->
 %% not the name of an active user-defined varying out fragment shader variable within  `Program' 
 %% , -1 will be returned. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetFragDataLocation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetFragDataLocation.xhtml">external</a> documentation.
 -spec getFragDataLocation(Program, Name) -> integer() when Program :: integer(),Name :: string().
 getFragDataLocation(Program,Name) ->
   NameLen = length(Name),
@@ -12655,7 +5565,7 @@ texParameterIiv(Target,Pname,Params) ->
 
 %% @doc glTexParameterI
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexParameterI.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec texParameterIuiv(Target, Pname, Params) -> 'ok' when Target :: enum(),Pname :: enum(),Params :: tuple().
 texParameterIuiv(Target,Pname,Params) ->
   cast(5570, <<Target:?GLenum,Pname:?GLenum,(size(Params)):?GLuint,
@@ -12669,7 +5579,7 @@ getTexParameterIiv(Target,Pname) ->
 
 %% @doc glGetTexParameterI
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetTexParameterI.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getTexParameterIuiv(Target, Pname) -> {integer(),integer(),integer(),integer()} when Target :: enum(),Pname :: enum().
 getTexParameterIuiv(Target,Pname) ->
   call(5572, <<Target:?GLenum,Pname:?GLenum>>).
@@ -12685,24 +5595,7 @@ getTexParameterIuiv(Target,Pname) ->
 %% and conversion for fixed-point color buffers are performed in the same fashion as  {@link gl:clearColor/4} 
 %% . 
 %%
-%%  If  `Buffer'  is `?GL_DEPTH',  `DrawBuffer'  must be zero, and  `Value' 
-%% points to a single value to clear the depth buffer to. Only ``gl:clearBufferfv'' should
-%% be used to clear depth buffers. Clamping and conversion for fixed-point depth buffers
-%% are performed in the same fashion as  {@link gl:clearDepth/1} . 
-%%
-%%  If  `Buffer'  is `?GL_STENCIL',  `DrawBuffer'  must be zero, and  `Value' 
-%% points to a single value to clear the stencil buffer to. Only ``gl:clearBufferiv'' should
-%% be used to clear stencil buffers. Masing and type conversion are performed in the same
-%% fashion as  {@link gl:clearStencil/1} . 
-%%
-%% ``gl:clearBufferfi'' may be used to clear the depth and stencil buffers.  `Buffer' 
-%% must be `?GL_DEPTH_STENCIL' and  `DrawBuffer'  must be zero.  `Depth'  and   `Stencil' 
-%%  are the depth and stencil values, respectively. 
-%%
-%%  The result of ``gl:clearBuffer'' is undefined if no conversion between the type of  `Value' 
-%%  and the buffer being cleared is defined. However, this is not an error. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearBuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClearBuffer.xhtml">external</a> documentation.
 -spec clearBufferiv(Buffer, Drawbuffer, Value) -> 'ok' when Buffer :: enum(),Drawbuffer :: integer(),Value :: tuple().
 clearBufferiv(Buffer,Drawbuffer,Value) ->
   cast(5573, <<Buffer:?GLenum,Drawbuffer:?GLint,(size(Value)):?GLuint,
@@ -12724,7 +5617,7 @@ clearBufferfv(Buffer,Drawbuffer,Value) ->
 
 %% @doc glClearBufferfi
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearBufferfi.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec clearBufferfi(Buffer, Drawbuffer, Depth, Stencil) -> 'ok' when Buffer :: enum(),Drawbuffer :: integer(),Depth :: float(),Stencil :: integer().
 clearBufferfi(Buffer,Drawbuffer,Depth,Stencil) ->
   cast(5576, <<Buffer:?GLenum,Drawbuffer:?GLint,Depth:?GLfloat,Stencil:?GLint>>).
@@ -12737,14 +5630,14 @@ getStringi(Name,Index) ->
 
 %% @doc glDrawArraysInstance
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawArraysInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec drawArraysInstanced(Mode, First, Count, Primcount) -> 'ok' when Mode :: enum(),First :: integer(),Count :: integer(),Primcount :: integer().
 drawArraysInstanced(Mode,First,Count,Primcount) ->
   cast(5578, <<Mode:?GLenum,First:?GLint,Count:?GLsizei,Primcount:?GLsizei>>).
 
 %% @doc glDrawElementsInstance
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElementsInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec drawElementsInstanced(Mode, Count, Type, Indices, Primcount) -> 'ok' when Mode :: enum(),Count :: integer(),Type :: enum(),Indices :: offset()|mem(),Primcount :: integer().
 drawElementsInstanced(Mode,Count,Type,Indices,Primcount) when  is_integer(Indices) ->
   cast(5579, <<Mode:?GLenum,Count:?GLsizei,Type:?GLenum,Indices:?GLuint,Primcount:?GLsizei>>);
@@ -12760,62 +5653,9 @@ drawElementsInstanced(Mode,Count,Type,Indices,Primcount) ->
 %% buffer texture is detached and no new buffer object is attached. If  `Buffer'  is non-zero,
 %% it must be the name of an existing buffer object.  `Target'  must be `?GL_TEXTURE_BUFFER'
 %% .  `Internalformat'  specifies the storage format, and must be one of the following
-%% sized internal formats: <table><tbody><tr><td></td><td></td><td></td><td></td><td>` Component '
-%% </td></tr></tbody><tbody><tr><td>`Sized Internal Format'</td><td>`Base Type'</td>
-%% <td>`Components'</td><td>`Norm'</td><td>0</td><td>1</td><td>2</td><td>3</td></tr>
-%% <tr><td>`?GL_R8'</td><td>ubyte</td><td>1</td><td>YES</td><td>R</td><td>0</td><td>0</td>
-%% <td>1</td></tr><tr><td>`?GL_R16'</td><td>ushort</td><td>1</td><td>YES</td><td>R</td><td>
-%% 0</td><td>0</td><td>1</td></tr><tr><td>`?GL_R16F'</td><td>half</td><td>1</td><td>NO</td>
-%% <td>R</td><td>0</td><td>0</td><td>1</td></tr><tr><td>`?GL_R32F'</td><td>float</td><td>
-%% 1</td><td>NO</td><td>R</td><td>0</td><td>0</td><td>1</td></tr><tr><td>`?GL_R8I'</td><td>
-%% byte</td><td>1</td><td>NO</td><td>R</td><td>0</td><td>0</td><td>1</td></tr><tr><td>`?GL_R16I'
-%% </td><td>short</td><td>1</td><td>NO</td><td>R</td><td>0</td><td>0</td><td>1</td></tr><tr><td>
-%% `?GL_R32I'</td><td>int</td><td>1</td><td>NO</td><td>R</td><td>0</td><td>0</td><td>1</td>
-%% </tr><tr><td>`?GL_R8UI'</td><td>ubyte</td><td>1</td><td>NO</td><td>R</td><td>0</td><td>
-%% 0</td><td>1</td></tr><tr><td>`?GL_R16UI'</td><td>ushort</td><td>1</td><td>NO</td><td>
-%% R</td><td>0</td><td>0</td><td>1</td></tr><tr><td>`?GL_R32UI'</td><td>uint</td><td>1</td>
-%% <td>NO</td><td>R</td><td>0</td><td>0</td><td>1</td></tr><tr><td>`?GL_RG8'</td><td>ubyte
-%% </td><td>2</td><td>YES</td><td>R</td><td>G</td><td>0</td><td>1</td></tr><tr><td>`?GL_RG16'
-%% </td><td>ushort</td><td>2</td><td>YES</td><td>R</td><td>G</td><td>0</td><td>1</td></tr><tr>
-%% <td>`?GL_RG16F'</td><td>half</td><td>2</td><td>NO</td><td>R</td><td>G</td><td>0</td><td>
-%% 1</td></tr><tr><td>`?GL_RG32F'</td><td>float</td><td>2</td><td>NO</td><td>R</td><td>G
-%% </td><td>0</td><td>1</td></tr><tr><td>`?GL_RG8I'</td><td>byte</td><td>2</td><td>NO</td>
-%% <td>R</td><td>G</td><td>0</td><td>1</td></tr><tr><td>`?GL_RG16I'</td><td>short</td><td>
-%% 2</td><td>NO</td><td>R</td><td>G</td><td>0</td><td>1</td></tr><tr><td>`?GL_RG32I'</td>
-%% <td>int</td><td>2</td><td>NO</td><td>R</td><td>G</td><td>0</td><td>1</td></tr><tr><td>`?GL_RG8UI'
-%% </td><td>ubyte</td><td>2</td><td>NO</td><td>R</td><td>G</td><td>0</td><td>1</td></tr><tr><td>
-%% `?GL_RG16UI'</td><td>ushort</td><td>2</td><td>NO</td><td>R</td><td>G</td><td>0</td><td>
-%% 1</td></tr><tr><td>`?GL_RG32UI'</td><td>uint</td><td>2</td><td>NO</td><td>R</td><td>G
-%% </td><td>0</td><td>1</td></tr><tr><td>`?GL_RGB32F'</td><td>float</td><td>3</td><td>NO
-%% </td><td>R</td><td>G</td><td>B</td><td>1</td></tr><tr><td>`?GL_RGB32I'</td><td>int</td>
-%% <td>3</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>1</td></tr><tr><td>`?GL_RGB32UI'
-%% </td><td>uint</td><td>3</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>1</td></tr><tr><td>
-%% `?GL_RGBA8'</td><td>uint</td><td>4</td><td>YES</td><td>R</td><td>G</td><td>B</td><td>
-%% A</td></tr><tr><td>`?GL_RGBA16'</td><td>short</td><td>4</td><td>YES</td><td>R</td><td>
-%% G</td><td>B</td><td>A</td></tr><tr><td>`?GL_RGBA16F'</td><td>half</td><td>4</td><td>NO
-%% </td><td>R</td><td>G</td><td>B</td><td>A</td></tr><tr><td>`?GL_RGBA32F'</td><td>float
-%% </td><td>4</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>A</td></tr><tr><td>`?GL_RGBA8I'
-%% </td><td>byte</td><td>4</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>A</td></tr><tr><td>
-%% `?GL_RGBA16I'</td><td>short</td><td>4</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>
-%% A</td></tr><tr><td>`?GL_RGBA32I'</td><td>int</td><td>4</td><td>NO</td><td>R</td><td>G
-%% </td><td>B</td><td>A</td></tr><tr><td>`?GL_RGBA8UI'</td><td>ubyte</td><td>4</td><td>NO
-%% </td><td>R</td><td>G</td><td>B</td><td>A</td></tr><tr><td>`?GL_RGBA16UI'</td><td>ushort
-%% </td><td>4</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>A</td></tr><tr><td>`?GL_RGBA32UI'
-%% </td><td>uint</td><td>4</td><td>NO</td><td>R</td><td>G</td><td>B</td><td>A</td></tr></tbody>
-%% </table>
-%%
-%%  When a buffer object is attached to a buffer texture, the buffer object's data store
-%% is taken as the texture's texel array. The number of texels in the buffer texture's texel
-%% array is given by  buffer_size components×sizeof( base_type/)
-%%
-%%  where `buffer_size' is the size of the buffer object, in basic machine units and
-%% components and base type are the element count and base data type for elements, as specified
-%% in the table above. The number of texels in the texel array is then clamped to the implementation-dependent
-%% limit `?GL_MAX_TEXTURE_BUFFER_SIZE'. When a buffer texture is accessed in a shader,
-%% the results of a texel fetch are undefined if the specified texel coordinate is negative,
-%% or greater than or equal to the clamped number of texels in the texel array. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexBuffer.xml">external</a> documentation.
+%% sized internal formats: 
+%%
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexBuffer.xhtml">external</a> documentation.
 -spec texBuffer(Target, Internalformat, Buffer) -> 'ok' when Target :: enum(),Internalformat :: enum(),Buffer :: integer().
 texBuffer(Target,Internalformat,Buffer) ->
   cast(5581, <<Target:?GLenum,Internalformat:?GLenum,Buffer:?GLuint>>).
@@ -12825,19 +5665,7 @@ texBuffer(Target,Internalformat,Buffer) ->
 %% ``gl:primitiveRestartIndex'' specifies a vertex array element that is treated specially
 %% when primitive restarting is enabled. This is known as the primitive restart index. 
 %%
-%%  When one of the `Draw*' commands transfers a set of generic attribute array elements
-%% to the GL, if the index within the vertex arrays corresponding to that set is equal to
-%% the primitive restart index, then the GL does not process those elements as a vertex.
-%% Instead, it is as if the drawing command ended with the immediately preceding transfer,
-%% and another drawing command is immediately started with the same parameters, but only
-%% transferring the immediately following element through the end of the originally specified
-%% elements. 
-%%
-%%  When either  {@link gl:drawElementsBaseVertex/5} ,  {@link gl:drawElementsInstancedBaseVertex/6} 
-%%  or see `glMultiDrawElementsBaseVertex' is used, the primitive restart comparison
-%% occurs before the basevertex offset is added to the array index. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPrimitiveRestartIndex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPrimitiveRestartIndex.xhtml">external</a> documentation.
 -spec primitiveRestartIndex(Index) -> 'ok' when Index :: integer().
 primitiveRestartIndex(Index) ->
   cast(5582, <<Index:?GLuint>>).
@@ -12850,7 +5678,7 @@ getInteger64i_v(Target,Index) ->
 
 %% @doc glGetBufferParameteri64v
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetBufferParameteri64v.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getBufferParameteri64v(Target, Pname) -> [integer()] when Target :: enum(),Pname :: enum().
 getBufferParameteri64v(Target,Pname) ->
   call(5584, <<Target:?GLenum,Pname:?GLenum>>).
@@ -12863,51 +5691,7 @@ getBufferParameteri64v(Target,Pname) ->
 %%  `Target'  must be `?GL_DRAW_FRAMEBUFFER', `?GL_READ_FRAMEBUFFER', or `?GL_FRAMEBUFFER'
 %% . `?GL_FRAMEBUFFER' is equivalent to `?GL_DRAW_FRAMEBUFFER'. 
 %%
-%%  `Attachment'  specifies the logical attachment of the framebuffer and must be `?GL_COLOR_ATTACHMENT'
-%% `i', `?GL_DEPTH_ATTACHMENT', `?GL_STENCIL_ATTACHMENT' or `?GL_DEPTH_STENCIL_ATTACHMMENT'
-%% . `i' in `?GL_COLOR_ATTACHMENT'`i' may range from zero to the value of `?GL_MAX_COLOR_ATTACHMENTS'
-%%  - 1. Attaching a level of a texture to `?GL_DEPTH_STENCIL_ATTACHMENT' is equivalent
-%% to attaching that level to both the `?GL_DEPTH_ATTACHMENT'`and' the `?GL_STENCIL_ATTACHMENT'
-%%  attachment points simultaneously. 
-%%
-%%  `Textarget'  specifies what type of texture is named by  `Texture' , and for cube
-%% map textures, specifies the face that is to be attached. If  `Texture'  is not zero,
-%% it must be the name of an existing texture with type  `Textarget' , unless it is a
-%% cube map texture, in which case  `Textarget'  must be `?GL_TEXTURE_CUBE_MAP_POSITIVE_X'
-%% `?GL_TEXTURE_CUBE_MAP_NEGATIVE_X', `?GL_TEXTURE_CUBE_MAP_POSITIVE_Y', `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y'
-%% , `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z', or `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z'. 
-%%
-%%  If  `Texture'  is non-zero, the specified  `Level'  of the texture object named  `Texture' 
-%%  is attached to the framebfufer attachment point named by  `Attachment' . For ``gl:framebufferTexture1D''
-%% , ``gl:framebufferTexture2D'', and ``gl:framebufferTexture3D'',  `Texture'  must
-%% be zero or the name of an existing texture with a target of  `Textarget' , or  `Texture' 
-%%  must be the name of an existing cube-map texture and  `Textarget'  must be one of `?GL_TEXTURE_CUBE_MAP_POSITIVE_X'
-%% , `?GL_TEXTURE_CUBE_MAP_POSITIVE_Y', `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z', `?GL_TEXTURE_CUBE_MAP_NEGATIVE_X'
-%% , `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y', or `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z'. 
-%%
-%%  If  `Textarget'  is `?GL_TEXTURE_RECTANGLE', `?GL_TEXTURE_2D_MULTISAMPLE',
-%% or `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY', then  `Level'  must be zero. If  `Textarget' 
-%%  is `?GL_TEXTURE_3D', then level must be greater than or equal to zero and less than
-%% or equal to log2 of the value of `?GL_MAX_3D_TEXTURE_SIZE'. If  `Textarget'  is
-%% one of `?GL_TEXTURE_CUBE_MAP_POSITIVE_X', `?GL_TEXTURE_CUBE_MAP_POSITIVE_Y', `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z'
-%% , `?GL_TEXTURE_CUBE_MAP_NEGATIVE_X', `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y', or `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z'
-%% , then  `Level'  must be greater than or equal to zero and less than or equal to log2
-%% of the value of `?GL_MAX_CUBE_MAP_TEXTURE_SIZE'. For all other values of  `Textarget' 
-%% ,  `Level'  must be greater than or equal to zero and no larger than log2 of the value
-%% of `?GL_MAX_TEXTURE_SIZE'. 
-%%
-%%  `Layer'  specifies the layer of a 2-dimensional image within a 3-dimensional texture.
-%% 
-%%
-%%  For ``gl:framebufferTexture1D'', if  `Texture'  is not zero, then  `Textarget' 
-%% must be `?GL_TEXTURE_1D'. For ``gl:framebufferTexture2D'', if  `Texture'  is
-%% not zero,  `Textarget'  must be one of `?GL_TEXTURE_2D', `?GL_TEXTURE_RECTANGLE'
-%% , `?GL_TEXTURE_CUBE_MAP_POSITIVE_X', `?GL_TEXTURE_CUBE_MAP_POSITIVE_Y', `?GL_TEXTURE_CUBE_MAP_POSITIVE_Z'
-%% , `?GL_TEXTURE_CUBE_MAP_NEGATIVE_X', `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Y', `?GL_TEXTURE_CUBE_MAP_NEGATIVE_Z'
-%% , or `?GL_TEXTURE_2D_MULTISAMPLE'. For ``gl:framebufferTexture3D'', if  `Texture' 
-%%  is not zero, then  `Textarget'  must be `?GL_TEXTURE_3D'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFramebufferTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFramebufferTexture.xhtml">external</a> documentation.
 -spec framebufferTexture(Target, Attachment, Texture, Level) -> 'ok' when Target :: enum(),Attachment :: enum(),Texture :: integer(),Level :: integer().
 framebufferTexture(Target,Attachment,Texture,Level) ->
   cast(5585, <<Target:?GLenum,Attachment:?GLenum,Texture:?GLuint,Level:?GLint>>).
@@ -12921,9 +5705,7 @@ framebufferTexture(Target,Attachment,Texture,Level) ->
 %% vertices being rendered. An attribute is referred to as instanced if its `?GL_VERTEX_ATTRIB_ARRAY_DIVISOR'
 %%  value is non-zero. 
 %%
-%%  `Index'  must be less than the value of `?GL_MAX_VERTEX_ATTRIBUTES'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribDivisor.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glVertexAttribDivisor.xhtml">external</a> documentation.
 -spec vertexAttribDivisor(Index, Divisor) -> 'ok' when Index :: integer(),Divisor :: integer().
 vertexAttribDivisor(Index,Divisor) ->
   cast(5586, <<Index:?GLuint,Divisor:?GLuint>>).
@@ -12938,13 +5720,7 @@ vertexAttribDivisor(Index,Divisor) ->
 %%  is the value of `?GL_SAMPLES' for the current framebuffer. At least 1 sample for
 %% each covered fragment is generated. 
 %%
-%%  A  `Value'  of 1.0 indicates that each sample in the framebuffer should be indpendently
-%% shaded. A  `Value'  of 0.0 effectively allows the GL to ignore sample rate shading.
-%% Any value between 0.0 and 1.0 allows the GL to shade only a subset of the total samples
-%% within each covered fragment. Which samples are shaded and the algorithm used to select
-%% that subset of the fragment's samples is implementation dependent. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMinSampleShading.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glMinSampleShading.xhtml">external</a> documentation.
 -spec minSampleShading(Value) -> 'ok' when Value :: clamp().
 minSampleShading(Value) ->
   cast(5587, <<Value:?GLclampf>>).
@@ -12963,7 +5739,7 @@ blendEquationSeparatei(Buf,ModeRGB,ModeAlpha) ->
 
 %% @doc glBlendFunci
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlendFunci.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec blendFunci(Buf, Src, Dst) -> 'ok' when Buf :: integer(),Src :: enum(),Dst :: enum().
 blendFunci(Buf,Src,Dst) ->
   cast(5590, <<Buf:?GLuint,Src:?GLenum,Dst:?GLenum>>).
@@ -12976,7 +5752,7 @@ blendFuncSeparatei(Buf,SrcRGB,DstRGB,SrcAlpha,DstAlpha) ->
 
 %% @doc glLoadTransposeMatrixARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLoadTransposeMatrixARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec loadTransposeMatrixfARB(M) -> 'ok' when M :: matrix().
 loadTransposeMatrixfARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5592, <<M1:?GLfloat,M2:?GLfloat,M3:?GLfloat,M4:?GLfloat,M5:?GLfloat,M6:?GLfloat,M7:?GLfloat,M8:?GLfloat,M9:?GLfloat,M10:?GLfloat,M11:?GLfloat,M12:?GLfloat,M13:?GLfloat,M14:?GLfloat,M15:?GLfloat,M16:?GLfloat>>);
@@ -12985,7 +5761,7 @@ loadTransposeMatrixfARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 
 %% @doc glLoadTransposeMatrixARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLoadTransposeMatrixARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec loadTransposeMatrixdARB(M) -> 'ok' when M :: matrix().
 loadTransposeMatrixdARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5593, <<M1:?GLdouble,M2:?GLdouble,M3:?GLdouble,M4:?GLdouble,M5:?GLdouble,M6:?GLdouble,M7:?GLdouble,M8:?GLdouble,M9:?GLdouble,M10:?GLdouble,M11:?GLdouble,M12:?GLdouble,M13:?GLdouble,M14:?GLdouble,M15:?GLdouble,M16:?GLdouble>>);
@@ -12994,7 +5770,7 @@ loadTransposeMatrixdARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 
 %% @doc glMultTransposeMatrixARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMultTransposeMatrixARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec multTransposeMatrixfARB(M) -> 'ok' when M :: matrix().
 multTransposeMatrixfARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5594, <<M1:?GLfloat,M2:?GLfloat,M3:?GLfloat,M4:?GLfloat,M5:?GLfloat,M6:?GLfloat,M7:?GLfloat,M8:?GLfloat,M9:?GLfloat,M10:?GLfloat,M11:?GLfloat,M12:?GLfloat,M13:?GLfloat,M14:?GLfloat,M15:?GLfloat,M16:?GLfloat>>);
@@ -13003,7 +5779,7 @@ multTransposeMatrixfARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 
 %% @doc glMultTransposeMatrixARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMultTransposeMatrixARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec multTransposeMatrixdARB(M) -> 'ok' when M :: matrix().
 multTransposeMatrixdARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16}) ->
   cast(5595, <<M1:?GLdouble,M2:?GLdouble,M3:?GLdouble,M4:?GLdouble,M5:?GLdouble,M6:?GLdouble,M7:?GLdouble,M8:?GLdouble,M9:?GLdouble,M10:?GLdouble,M11:?GLdouble,M12:?GLdouble,M13:?GLdouble,M14:?GLdouble,M15:?GLdouble,M16:?GLdouble>>);
@@ -13012,7 +5788,7 @@ multTransposeMatrixdARB({M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12}) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightbvARB(Weights) -> 'ok' when Weights :: [integer()].
 weightbvARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13021,7 +5797,7 @@ weightbvARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightsvARB(Weights) -> 'ok' when Weights :: [integer()].
 weightsvARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13030,7 +5806,7 @@ weightsvARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightivARB(Weights) -> 'ok' when Weights :: [integer()].
 weightivARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13039,7 +5815,7 @@ weightivARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightfvARB(Weights) -> 'ok' when Weights :: [float()].
 weightfvARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13048,7 +5824,7 @@ weightfvARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightdvARB(Weights) -> 'ok' when Weights :: [float()].
 weightdvARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13057,7 +5833,7 @@ weightdvARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightubvARB(Weights) -> 'ok' when Weights :: [integer()].
 weightubvARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13066,7 +5842,7 @@ weightubvARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightusvARB(Weights) -> 'ok' when Weights :: [integer()].
 weightusvARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13075,7 +5851,7 @@ weightusvARB(Weights) ->
 
 %% @doc glWeightARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWeightARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec weightuivARB(Weights) -> 'ok' when Weights :: [integer()].
 weightuivARB(Weights) ->
   WeightsLen = length(Weights),
@@ -13084,21 +5860,21 @@ weightuivARB(Weights) ->
 
 %% @doc glVertexBlenARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexBlenARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexBlendARB(Count) -> 'ok' when Count :: integer().
 vertexBlendARB(Count) ->
   cast(5604, <<Count:?GLint>>).
 
 %% @doc glCurrentPaletteMatrixARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCurrentPaletteMatrixARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec currentPaletteMatrixARB(Index) -> 'ok' when Index :: integer().
 currentPaletteMatrixARB(Index) ->
   cast(5605, <<Index:?GLint>>).
 
 %% @doc glMatrixIndexARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMatrixIndexARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec matrixIndexubvARB(Indices) -> 'ok' when Indices :: [integer()].
 matrixIndexubvARB(Indices) ->
   IndicesLen = length(Indices),
@@ -13107,7 +5883,7 @@ matrixIndexubvARB(Indices) ->
 
 %% @doc glMatrixIndexARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMatrixIndexARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec matrixIndexusvARB(Indices) -> 'ok' when Indices :: [integer()].
 matrixIndexusvARB(Indices) ->
   IndicesLen = length(Indices),
@@ -13116,7 +5892,7 @@ matrixIndexusvARB(Indices) ->
 
 %% @doc glMatrixIndexARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMatrixIndexARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec matrixIndexuivARB(Indices) -> 'ok' when Indices :: [integer()].
 matrixIndexuivARB(Indices) ->
   IndicesLen = length(Indices),
@@ -13125,7 +5901,7 @@ matrixIndexuivARB(Indices) ->
 
 %% @doc glProgramStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programStringARB(Target, Format, String) -> 'ok' when Target :: enum(),Format :: enum(),String :: string().
 programStringARB(Target,Format,String) ->
   StringLen = length(String),
@@ -13133,14 +5909,14 @@ programStringARB(Target,Format,String) ->
 
 %% @doc glBindProgramARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindProgramARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec bindProgramARB(Target, Program) -> 'ok' when Target :: enum(),Program :: integer().
 bindProgramARB(Target,Program) ->
   cast(5610, <<Target:?GLenum,Program:?GLuint>>).
 
 %% @doc glDeleteProgramsARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteProgramsARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec deleteProgramsARB(Programs) -> 'ok' when Programs :: [integer()].
 deleteProgramsARB(Programs) ->
   ProgramsLen = length(Programs),
@@ -13149,98 +5925,98 @@ deleteProgramsARB(Programs) ->
 
 %% @doc glGenProgramsARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenProgramsARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec genProgramsARB(N) -> [integer()] when N :: integer().
 genProgramsARB(N) ->
   call(5612, <<N:?GLsizei>>).
 
 %% @doc glProgramEnvParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramEnvParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programEnvParameter4dARB(Target, Index, X, Y, Z, W) -> 'ok' when Target :: enum(),Index :: integer(),X :: float(),Y :: float(),Z :: float(),W :: float().
 programEnvParameter4dARB(Target,Index,X,Y,Z,W) ->
   cast(5613, <<Target:?GLenum,Index:?GLuint,X:?GLdouble,Y:?GLdouble,Z:?GLdouble,W:?GLdouble>>).
 
 %% @doc glProgramEnvParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramEnvParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programEnvParameter4dvARB(Target, Index, Params) -> 'ok' when Target :: enum(),Index :: integer(),Params :: {float(),float(),float(),float()}.
 programEnvParameter4dvARB(Target,Index,{P1,P2,P3,P4}) ->
   cast(5614, <<Target:?GLenum,Index:?GLuint,P1:?GLdouble,P2:?GLdouble,P3:?GLdouble,P4:?GLdouble>>).
 
 %% @doc glProgramEnvParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramEnvParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programEnvParameter4fARB(Target, Index, X, Y, Z, W) -> 'ok' when Target :: enum(),Index :: integer(),X :: float(),Y :: float(),Z :: float(),W :: float().
 programEnvParameter4fARB(Target,Index,X,Y,Z,W) ->
   cast(5615, <<Target:?GLenum,Index:?GLuint,X:?GLfloat,Y:?GLfloat,Z:?GLfloat,W:?GLfloat>>).
 
 %% @doc glProgramEnvParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramEnvParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programEnvParameter4fvARB(Target, Index, Params) -> 'ok' when Target :: enum(),Index :: integer(),Params :: {float(),float(),float(),float()}.
 programEnvParameter4fvARB(Target,Index,{P1,P2,P3,P4}) ->
   cast(5616, <<Target:?GLenum,Index:?GLuint,P1:?GLfloat,P2:?GLfloat,P3:?GLfloat,P4:?GLfloat>>).
 
 %% @doc glProgramLocalParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramLocalParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programLocalParameter4dARB(Target, Index, X, Y, Z, W) -> 'ok' when Target :: enum(),Index :: integer(),X :: float(),Y :: float(),Z :: float(),W :: float().
 programLocalParameter4dARB(Target,Index,X,Y,Z,W) ->
   cast(5617, <<Target:?GLenum,Index:?GLuint,X:?GLdouble,Y:?GLdouble,Z:?GLdouble,W:?GLdouble>>).
 
 %% @doc glProgramLocalParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramLocalParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programLocalParameter4dvARB(Target, Index, Params) -> 'ok' when Target :: enum(),Index :: integer(),Params :: {float(),float(),float(),float()}.
 programLocalParameter4dvARB(Target,Index,{P1,P2,P3,P4}) ->
   cast(5618, <<Target:?GLenum,Index:?GLuint,P1:?GLdouble,P2:?GLdouble,P3:?GLdouble,P4:?GLdouble>>).
 
 %% @doc glProgramLocalParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramLocalParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programLocalParameter4fARB(Target, Index, X, Y, Z, W) -> 'ok' when Target :: enum(),Index :: integer(),X :: float(),Y :: float(),Z :: float(),W :: float().
 programLocalParameter4fARB(Target,Index,X,Y,Z,W) ->
   cast(5619, <<Target:?GLenum,Index:?GLuint,X:?GLfloat,Y:?GLfloat,Z:?GLfloat,W:?GLfloat>>).
 
 %% @doc glProgramLocalParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramLocalParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec programLocalParameter4fvARB(Target, Index, Params) -> 'ok' when Target :: enum(),Index :: integer(),Params :: {float(),float(),float(),float()}.
 programLocalParameter4fvARB(Target,Index,{P1,P2,P3,P4}) ->
   cast(5620, <<Target:?GLenum,Index:?GLuint,P1:?GLfloat,P2:?GLfloat,P3:?GLfloat,P4:?GLfloat>>).
 
 %% @doc glGetProgramEnvParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramEnvParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getProgramEnvParameterdvARB(Target, Index) -> {float(),float(),float(),float()} when Target :: enum(),Index :: integer().
 getProgramEnvParameterdvARB(Target,Index) ->
   call(5621, <<Target:?GLenum,Index:?GLuint>>).
 
 %% @doc glGetProgramEnvParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramEnvParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getProgramEnvParameterfvARB(Target, Index) -> {float(),float(),float(),float()} when Target :: enum(),Index :: integer().
 getProgramEnvParameterfvARB(Target,Index) ->
   call(5622, <<Target:?GLenum,Index:?GLuint>>).
 
 %% @doc glGetProgramLocalParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramLocalParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getProgramLocalParameterdvARB(Target, Index) -> {float(),float(),float(),float()} when Target :: enum(),Index :: integer().
 getProgramLocalParameterdvARB(Target,Index) ->
   call(5623, <<Target:?GLenum,Index:?GLuint>>).
 
 %% @doc glGetProgramLocalParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramLocalParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getProgramLocalParameterfvARB(Target, Index) -> {float(),float(),float(),float()} when Target :: enum(),Index :: integer().
 getProgramLocalParameterfvARB(Target,Index) ->
   call(5624, <<Target:?GLenum,Index:?GLuint>>).
 
 %% @doc glGetProgramStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getProgramStringARB(Target, Pname, String) -> 'ok' when Target :: enum(),Pname :: enum(),String :: mem().
 getProgramStringARB(Target,Pname,String) ->
   send_bin(String),
@@ -13248,42 +6024,42 @@ getProgramStringARB(Target,Pname,String) ->
 
 %% @doc glGetBufferParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetBufferParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getBufferParameterivARB(Target, Pname) -> [integer()] when Target :: enum(),Pname :: enum().
 getBufferParameterivARB(Target,Pname) ->
   call(5626, <<Target:?GLenum,Pname:?GLenum>>).
 
 %% @doc glDeleteObjectARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteObjectARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec deleteObjectARB(Obj) -> 'ok' when Obj :: integer().
 deleteObjectARB(Obj) ->
   cast(5627, <<Obj:?GLhandleARB>>).
 
 %% @doc glGetHandleARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetHandleARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getHandleARB(Pname) -> integer() when Pname :: enum().
 getHandleARB(Pname) ->
   call(5628, <<Pname:?GLenum>>).
 
 %% @doc glDetachObjectARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDetachObjectARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec detachObjectARB(ContainerObj, AttachedObj) -> 'ok' when ContainerObj :: integer(),AttachedObj :: integer().
 detachObjectARB(ContainerObj,AttachedObj) ->
   cast(5629, <<ContainerObj:?GLhandleARB,AttachedObj:?GLhandleARB>>).
 
 %% @doc glCreateShaderObjectARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCreateShaderObjectARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec createShaderObjectARB(ShaderType) -> integer() when ShaderType :: enum().
 createShaderObjectARB(ShaderType) ->
   call(5630, <<ShaderType:?GLenum>>).
 
 %% @doc glShaderSourceARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glShaderSourceARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec shaderSourceARB(ShaderObj, String) -> 'ok' when ShaderObj :: integer(),String :: iolist().
 shaderSourceARB(ShaderObj,String) ->
   StringTemp = list_to_binary([[Str|[0]] || Str <- String ]),
@@ -13292,77 +6068,77 @@ shaderSourceARB(ShaderObj,String) ->
 
 %% @doc glCompileShaderARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompileShaderARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec compileShaderARB(ShaderObj) -> 'ok' when ShaderObj :: integer().
 compileShaderARB(ShaderObj) ->
   cast(5632, <<ShaderObj:?GLhandleARB>>).
 
 %% @doc glCreateProgramObjectARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCreateProgramObjectARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec createProgramObjectARB() -> integer().
 createProgramObjectARB() ->
   call(5633, <<>>).
 
 %% @doc glAttachObjectARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glAttachObjectARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec attachObjectARB(ContainerObj, Obj) -> 'ok' when ContainerObj :: integer(),Obj :: integer().
 attachObjectARB(ContainerObj,Obj) ->
   cast(5634, <<ContainerObj:?GLhandleARB,Obj:?GLhandleARB>>).
 
 %% @doc glLinkProgramARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glLinkProgramARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec linkProgramARB(ProgramObj) -> 'ok' when ProgramObj :: integer().
 linkProgramARB(ProgramObj) ->
   cast(5635, <<ProgramObj:?GLhandleARB>>).
 
 %% @doc glUseProgramObjectARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glUseProgramObjectARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec useProgramObjectARB(ProgramObj) -> 'ok' when ProgramObj :: integer().
 useProgramObjectARB(ProgramObj) ->
   cast(5636, <<ProgramObj:?GLhandleARB>>).
 
 %% @doc glValidateProgramARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glValidateProgramARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec validateProgramARB(ProgramObj) -> 'ok' when ProgramObj :: integer().
 validateProgramARB(ProgramObj) ->
   cast(5637, <<ProgramObj:?GLhandleARB>>).
 
 %% @doc glGetObjectParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetObjectParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getObjectParameterfvARB(Obj, Pname) -> float() when Obj :: integer(),Pname :: enum().
 getObjectParameterfvARB(Obj,Pname) ->
   call(5638, <<Obj:?GLhandleARB,Pname:?GLenum>>).
 
 %% @doc glGetObjectParameterARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetObjectParameterARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getObjectParameterivARB(Obj, Pname) -> integer() when Obj :: integer(),Pname :: enum().
 getObjectParameterivARB(Obj,Pname) ->
   call(5639, <<Obj:?GLhandleARB,Pname:?GLenum>>).
 
 %% @doc glGetInfoLogARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetInfoLogARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getInfoLogARB(Obj, MaxLength) -> string() when Obj :: integer(),MaxLength :: integer().
 getInfoLogARB(Obj,MaxLength) ->
   call(5640, <<Obj:?GLhandleARB,MaxLength:?GLsizei>>).
 
 %% @doc glGetAttachedObjectsARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetAttachedObjectsARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getAttachedObjectsARB(ContainerObj, MaxCount) -> [integer()] when ContainerObj :: integer(),MaxCount :: integer().
 getAttachedObjectsARB(ContainerObj,MaxCount) ->
   call(5641, <<ContainerObj:?GLhandleARB,MaxCount:?GLsizei>>).
 
 %% @doc glGetUniformLocationARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocationARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getUniformLocationARB(ProgramObj, Name) -> integer() when ProgramObj :: integer(),Name :: string().
 getUniformLocationARB(ProgramObj,Name) ->
   NameLen = length(Name),
@@ -13370,35 +6146,35 @@ getUniformLocationARB(ProgramObj,Name) ->
 
 %% @doc glGetActiveUniformARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveUniformARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getActiveUniformARB(ProgramObj, Index, MaxLength) -> {Size :: integer(),Type :: enum(),Name :: string()} when ProgramObj :: integer(),Index :: integer(),MaxLength :: integer().
 getActiveUniformARB(ProgramObj,Index,MaxLength) ->
   call(5643, <<ProgramObj:?GLhandleARB,Index:?GLuint,MaxLength:?GLsizei>>).
 
 %% @doc glGetUniformARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getUniformfvARB(ProgramObj, Location) -> matrix() when ProgramObj :: integer(),Location :: integer().
 getUniformfvARB(ProgramObj,Location) ->
   call(5644, <<ProgramObj:?GLhandleARB,Location:?GLint>>).
 
 %% @doc glGetUniformARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getUniformivARB(ProgramObj, Location) -> {integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer()} when ProgramObj :: integer(),Location :: integer().
 getUniformivARB(ProgramObj,Location) ->
   call(5645, <<ProgramObj:?GLhandleARB,Location:?GLint>>).
 
 %% @doc glGetShaderSourceARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetShaderSourceARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getShaderSourceARB(Obj, MaxLength) -> string() when Obj :: integer(),MaxLength :: integer().
 getShaderSourceARB(Obj,MaxLength) ->
   call(5646, <<Obj:?GLhandleARB,MaxLength:?GLsizei>>).
 
 %% @doc glBindAttribLocationARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindAttribLocationARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec bindAttribLocationARB(ProgramObj, Index, Name) -> 'ok' when ProgramObj :: integer(),Index :: integer(),Name :: string().
 bindAttribLocationARB(ProgramObj,Index,Name) ->
   NameLen = length(Name),
@@ -13406,14 +6182,14 @@ bindAttribLocationARB(ProgramObj,Index,Name) ->
 
 %% @doc glGetActiveAttribARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveAttribARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getActiveAttribARB(ProgramObj, Index, MaxLength) -> {Size :: integer(),Type :: enum(),Name :: string()} when ProgramObj :: integer(),Index :: integer(),MaxLength :: integer().
 getActiveAttribARB(ProgramObj,Index,MaxLength) ->
   call(5648, <<ProgramObj:?GLhandleARB,Index:?GLuint,MaxLength:?GLsizei>>).
 
 %% @doc glGetAttribLocationARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocationARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getAttribLocationARB(ProgramObj, Name) -> integer() when ProgramObj :: integer(),Name :: string().
 getAttribLocationARB(ProgramObj,Name) ->
   NameLen = length(Name),
@@ -13429,7 +6205,7 @@ getAttribLocationARB(ProgramObj,Name) ->
 %% , then the name is not a renderbuffer object and ``gl:isRenderbuffer'' returns `?GL_FALSE'
 %% . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsRenderbuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsRenderbuffer.xhtml">external</a> documentation.
 -spec isRenderbuffer(Renderbuffer) -> 0|1 when Renderbuffer :: integer().
 isRenderbuffer(Renderbuffer) ->
   call(5650, <<Renderbuffer:?GLuint>>).
@@ -13442,7 +6218,7 @@ isRenderbuffer(Renderbuffer) ->
 %% call to  {@link gl:genRenderbuffers/1} , or zero to break the existing binding of a renderbuffer
 %% object to  `Target' . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindRenderbuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindRenderbuffer.xhtml">external</a> documentation.
 -spec bindRenderbuffer(Target, Renderbuffer) -> 'ok' when Target :: enum(),Renderbuffer :: integer().
 bindRenderbuffer(Target,Renderbuffer) ->
   cast(5651, <<Target:?GLenum,Renderbuffer:?GLuint>>).
@@ -13457,14 +6233,7 @@ bindRenderbuffer(Target,Renderbuffer) ->
 %% it is as though  {@link gl:bindRenderbuffer/2}  had been executed with a  `Target'  of `?GL_RENDERBUFFER'
 %%  and a  `Name'  of zero. 
 %%
-%%  If a renderbuffer object is attached to one or more attachment points in the currently
-%% bound framebuffer, then it as if  {@link gl:framebufferRenderbuffer/4}  had been called,
-%% with a  `Renderbuffer'  of zero for each attachment point to which this image was attached
-%% in the currently bound framebuffer. In other words, this renderbuffer object is first
-%% detached from all attachment ponits in the currently bound framebuffer. Note that the
-%% renderbuffer image is specifically `not' detached from any non-bound framebuffers. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteRenderbuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteRenderbuffers.xhtml">external</a> documentation.
 -spec deleteRenderbuffers(Renderbuffers) -> 'ok' when Renderbuffers :: [integer()].
 deleteRenderbuffers(Renderbuffers) ->
   RenderbuffersLen = length(Renderbuffers),
@@ -13478,13 +6247,7 @@ deleteRenderbuffers(Renderbuffers) ->
 %% is guaranteed that none of the returned names was in use immediately before the call to ``gl:genRenderbuffers''
 %% . 
 %%
-%%  Renderbuffer object names returned by a call to ``gl:genRenderbuffers'' are not returned
-%% by subsequent calls, unless they are first deleted with  {@link gl:deleteRenderbuffers/1} . 
-%%
-%%  The names returned in  `Renderbuffers'  are marked as used, for the purposes of ``gl:genRenderbuffers''
-%%  only, but they acquire state and type only when they are first bound. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenRenderbuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenRenderbuffers.xhtml">external</a> documentation.
 -spec genRenderbuffers(N) -> [integer()] when N :: integer().
 genRenderbuffers(N) ->
   call(5653, <<N:?GLsizei>>).
@@ -13494,18 +6257,7 @@ genRenderbuffers(N) ->
 %% ``gl:renderbufferStorage'' is equivalent to calling  {@link gl:renderbufferStorageMultisample/5} 
 %%  with the  `Samples'  set to zero. 
 %%
-%%  The target of the operation, specified by  `Target'  must be `?GL_RENDERBUFFER'.
-%%  `Internalformat'  specifies the internal format to be used for the renderbuffer object's
-%% storage and must be a color-renderable, depth-renderable, or stencil-renderable format.  `Width' 
-%%  and  `Height'  are the dimensions, in pixels, of the renderbuffer. Both  `Width' 
-%% and  `Height'  must be less than or equal to the value of `?GL_MAX_RENDERBUFFER_SIZE'
-%% . 
-%%
-%%  Upon success, ``gl:renderbufferStorage'' deletes any existing data store for the renderbuffer
-%% image and the contents of the data store after calling ``gl:renderbufferStorage'' are
-%% undefined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glRenderbufferStorage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glRenderbufferStorage.xhtml">external</a> documentation.
 -spec renderbufferStorage(Target, Internalformat, Width, Height) -> 'ok' when Target :: enum(),Internalformat :: enum(),Width :: integer(),Height :: integer().
 renderbufferStorage(Target,Internalformat,Width,Height) ->
   cast(5654, <<Target:?GLenum,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei>>).
@@ -13520,20 +6272,7 @@ renderbufferStorage(Target,Internalformat,Width,Height) ->
 %% , `?GL_RENDERBUFFER_DEPTH_SIZE', `?GL_RENDERBUFFER_DEPTH_SIZE', `?GL_RENDERBUFFER_STENCIL_SIZE'
 %% , or `?GL_RENDERBUFFER_SAMPLES'. 
 %%
-%%  Upon a successful return from ``gl:getRenderbufferParameteriv'', if  `Pname'  is `?GL_RENDERBUFFER_WIDTH'
-%% , `?GL_RENDERBUFFER_HEIGHT', `?GL_RENDERBUFFER_INTERNAL_FORMAT', or `?GL_RENDERBUFFER_SAMPLES'
-%% , then  `Params'  will contain the width in pixels, the height in pixels, the internal
-%% format, or the number of samples, respectively, of the image of the renderbuffer currently
-%% bound to  `Target' . 
-%%
-%%  If  `Pname'  is `?GL_RENDERBUFFER_RED_SIZE', `?GL_RENDERBUFFER_GREEN_SIZE',
-%% `?GL_RENDERBUFFER_BLUE_SIZE', `?GL_RENDERBUFFER_ALPHA_SIZE', `?GL_RENDERBUFFER_DEPTH_SIZE'
-%% , or `?GL_RENDERBUFFER_STENCIL_SIZE', then  `Params'  will contain the actual
-%% resolutions (not the resolutions specified when the image array was defined) for the red,
-%% green, blue, alpha depth, or stencil components, respectively, of the image of the renderbuffer
-%% currently bound to  `Target' . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetRenderbufferParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetRenderbufferParameter.xhtml">external</a> documentation.
 -spec getRenderbufferParameteriv(Target, Pname) -> integer() when Target :: enum(),Pname :: enum().
 getRenderbufferParameteriv(Target,Pname) ->
   call(5655, <<Target:?GLenum,Pname:?GLenum>>).
@@ -13547,7 +6286,7 @@ getRenderbufferParameteriv(Target,Pname) ->
 %% , by that has not yet been bound through a call to  {@link gl:bindFramebuffer/2} , then the
 %% name is not a framebuffer object and ``gl:isFramebuffer'' returns `?GL_FALSE'. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsFramebuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsFramebuffer.xhtml">external</a> documentation.
 -spec isFramebuffer(Framebuffer) -> 0|1 when Framebuffer :: integer().
 isFramebuffer(Framebuffer) ->
   call(5656, <<Framebuffer:?GLuint>>).
@@ -13565,7 +6304,7 @@ isFramebuffer(Framebuffer) ->
 %% a call to  {@link gl:genFramebuffers/1} , or zero to break the existing binding of a framebuffer
 %% object to  `Target' . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindFramebuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindFramebuffer.xhtml">external</a> documentation.
 -spec bindFramebuffer(Target, Framebuffer) -> 'ok' when Target :: enum(),Framebuffer :: integer().
 bindFramebuffer(Target,Framebuffer) ->
   cast(5657, <<Target:?GLenum,Framebuffer:?GLuint>>).
@@ -13580,7 +6319,7 @@ bindFramebuffer(Target,Framebuffer) ->
 %%  or `?GL_READ_FRAMEBUFFER' is deleted, it is as though  {@link gl:bindFramebuffer/2} 
 %% had been executed with the corresponding  `Target'  and  `Framebuffer'  zero. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteFramebuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteFramebuffers.xhtml">external</a> documentation.
 -spec deleteFramebuffers(Framebuffers) -> 'ok' when Framebuffers :: [integer()].
 deleteFramebuffers(Framebuffers) ->
   FramebuffersLen = length(Framebuffers),
@@ -13594,13 +6333,7 @@ deleteFramebuffers(Framebuffers) ->
 %% that none of the returned names was in use immediately before the call to ``gl:genFramebuffers''
 %% . 
 %%
-%%  Framebuffer object names returned by a call to ``gl:genFramebuffers'' are not returned
-%% by subsequent calls, unless they are first deleted with  {@link gl:deleteFramebuffers/1} . 
-%%
-%%  The names returned in  `Ids'  are marked as used, for the purposes of ``gl:genFramebuffers''
-%%  only, but they acquire state and type only when they are first bound. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenFramebuffers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenFramebuffers.xhtml">external</a> documentation.
 -spec genFramebuffers(N) -> [integer()] when N :: integer().
 genFramebuffers(N) ->
   call(5659, <<N:?GLsizei>>).
@@ -13612,46 +6345,7 @@ genFramebuffers(N) ->
 %%  or `?GL_FRAMEBUFFER'. `?GL_FRAMEBUFFER' is equivalent to `?GL_DRAW_FRAMEBUFFER'
 %% . 
 %%
-%%  The return value is `?GL_FRAMEBUFFER_COMPLETE' if the framebuffer bound to  `Target' 
-%%  is complete. Otherwise, the return value is determined as follows: 
-%%
-%% `?GL_FRAMEBUFFER_UNDEFINED' is returned if  `Target'  is the default framebuffer,
-%% but the default framebuffer does not exist. 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT' is returned if any of the framebuffer attachment
-%% points are framebuffer incomplete. 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT' is returned if the framebuffer does
-%% not have at least one image attached to it. 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER' is returned if the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE'
-%%  is `?GL_NONE' for any color attachment point(s) named by `?GL_DRAWBUFFERi'. 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER' is returned if `?GL_READ_BUFFER' is
-%% not `?GL_NONE' and the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE' is `?GL_NONE'
-%%  for the color attachment point named by `?GL_READ_BUFFER'. 
-%%
-%% `?GL_FRAMEBUFFER_UNSUPPORTED' is returned if the combination of internal formats
-%% of the attached images violates an implementation-dependent set of restrictions. 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE' is returned if the value of `?GL_RENDERBUFFER_SAMPLES'
-%%  is not the same for all attached renderbuffers; if the value of `?GL_TEXTURE_SAMPLES'
-%%  is the not same for all attached textures; or, if the attached images are a mix of renderbuffers
-%% and textures, the value of `?GL_RENDERBUFFER_SAMPLES' does not match the value of `?GL_TEXTURE_SAMPLES'
-%% . 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE' is also returned if the value of `?GL_TEXTURE_FIXED_SAMPLE_LOCATIONS'
-%%  is not the same for all attached textures; or, if the attached images are a mix of renderbuffers
-%% and textures, the value of `?GL_TEXTURE_FIXED_SAMPLE_LOCATIONS' is not `?GL_TRUE'
-%%  for all attached textures. 
-%%
-%% `?GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS' is returned if any framebuffer attachment
-%% is layered, and any populated attachment is not layered, or if all populated color attachments
-%% are not from textures of the same target. 
-%%
-%%  Additionally, if an error occurs, zero is returned. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCheckFramebufferStatus.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCheckFramebufferStatus.xhtml">external</a> documentation.
 -spec checkFramebufferStatus(Target) -> enum() when Target :: enum().
 checkFramebufferStatus(Target) ->
   call(5660, <<Target:?GLenum>>).
@@ -13684,24 +6378,7 @@ framebufferTexture3D(Target,Attachment,Textarget,Texture,Level,Zoffset) ->
 %% buffer identified by  `Attachment'  of the framebuffer currently bound to  `Target' .
 %% 
 %%
-%%  The value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE' for the specified attachment
-%% point is set to `?GL_RENDERBUFFER' and the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME'
-%%  is set to  `Renderbuffer' . All other state values of the attachment point specified
-%% by  `Attachment'  are set to their default values. No change is made to the state of
-%% the renderbuuffer object and any previous attachment to the  `Attachment'  logical
-%% buffer of the framebuffer  `Target'  is broken. 
-%%
-%%  Calling ``gl:framebufferRenderbuffer'' with the renderbuffer name zero will detach
-%% the image, if any, identified by  `Attachment' , in the framebuffer currently bound
-%% to  `Target' . All state values of the attachment point specified by attachment in
-%% the object bound to target are set to their default values. 
-%%
-%%  Setting  `Attachment'  to the value `?GL_DEPTH_STENCIL_ATTACHMENT' is a special
-%% case causing both the depth and stencil attachments of the framebuffer object to be set
-%% to  `Renderbuffer' , which should have the base internal format `?GL_DEPTH_STENCIL'
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFramebufferRenderbuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFramebufferRenderbuffer.xhtml">external</a> documentation.
 -spec framebufferRenderbuffer(Target, Attachment, Renderbuffertarget, Renderbuffer) -> 'ok' when Target :: enum(),Attachment :: enum(),Renderbuffertarget :: enum(),Renderbuffer :: integer().
 framebufferRenderbuffer(Target,Attachment,Renderbuffertarget,Renderbuffer) ->
   cast(5664, <<Target:?GLenum,Attachment:?GLenum,Renderbuffertarget:?GLenum,Renderbuffer:?GLuint>>).
@@ -13713,91 +6390,7 @@ framebufferRenderbuffer(Target,Attachment,Renderbuffertarget,Renderbuffer) ->
 %% be `?GL_DRAW_FRAMEBUFFER', `?GL_READ_FRAMEBUFFER' or `?GL_FRAMEBUFFER'. `?GL_FRAMEBUFFER'
 %%  is equivalent to `?GL_DRAW_FRAMEBUFFER'. 
 %%
-%%  If the default framebuffer is bound to  `Target'  then  `Attachment'  must be one
-%% of `?GL_FRONT_LEFT', `?GL_FRONT_RIGHT', `?GL_BACK_LEFT', or `?GL_BACK_RIGHT'
-%% , identifying a color buffer, `?GL_DEPTH', identifying the depth buffer, or `?GL_STENCIL'
-%% , identifying the stencil buffer. 
-%%
-%%  If a framebuffer object is bound, then  `Attachment'  must be one of `?GL_COLOR_ATTACHMENT'
-%% `i', `?GL_DEPTH_ATTACHMENT', `?GL_STENCIL_ATTACHMENT', or `?GL_DEPTH_STENCIL_ATTACHMENT'
-%% . `i' in `?GL_COLOR_ATTACHMENT'`i' must be in the range zero to the value
-%% of `?GL_MAX_COLOR_ATTACHMENTS' - 1. 
-%%
-%%  If  `Attachment'  is `?GL_DEPTH_STENCIL_ATTACHMENT' and different objects are
-%% bound to the depth and stencil attachment points of  `Target'  the query will fail.
-%% If the same object is bound to both attachment points, information about that object will
-%% be returned. 
-%%
-%%  Upon successful return from ``gl:getFramebufferAttachmentParameteriv'', if  `Pname' 
-%% is `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE', then  `Params'  will contain one of `?GL_NONE'
-%% , `?GL_FRAMEBUFFER_DEFAULT', `?GL_TEXTURE', or `?GL_RENDERBUFFER', identifying
-%% the type of object which contains the attached image. Other values accepted for  `Pname' 
-%%  depend on the type of object, as described below. 
-%%
-%%  If the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE' is `?GL_NONE', no
-%% framebuffer is bound to  `Target' . In this case querying  `Pname' `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME'
-%%  will return zero, and all other queries will generate an error. 
-%%
-%%  If the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE' is not `?GL_NONE',
-%% these queries apply to all other framebuffer types: 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE', `?GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE'
-%% , `?GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE', `?GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE'
-%% , `?GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE', or `?GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE'
-%% , then  `Params'  will contain the number of bits in the corresponding red, green,
-%% blue, alpha, depth, or stencil component of the specified attachment. Zero is returned
-%% if the requested component is not present in  `Attachment' . 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE',  `Params'  will
-%% contain the format of components of the specified attachment, one of `?GL_FLOAT',  `GL_INT' 
-%% ,  `GL_UNSIGNED_INT' ,  `GL_SIGNED_NORMALIZED' , or  `GL_UNSIGNED_NORMALIZED' 
-%% for floating-point, signed integer, unsigned integer, signed normalized fixed-point, or
-%% unsigned normalized fixed-point components respectively. Only color buffers may have integer
-%% components. 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING',  `Param'  will
-%% contain the encoding of components of the specified attachment, one of `?GL_LINEAR'
-%% or `?GL_SRGB' for linear or sRGB-encoded components, respectively. Only color buffer
-%% components may be sRGB-encoded; such components are treated as described in sections 4.1.7
-%% and 4.1.8. For the default framebuffer, color encoding is determined by the implementation.
-%% For framebuffer objects, components are sRGB-encoded if the internal format of a color
-%% attachment is one of the color-renderable SRGB formats. 
-%%
-%%  If the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE' is `?GL_RENDERBUFFER',
-%% then: 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME',  `Params'  will
-%% contain the name of the renderbuffer object which contains the attached image. 
-%%
-%%  If the value of `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE' is `?GL_TEXTURE',
-%% then: 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME', then  `Params' 
-%% will contain the name of the texture object which contains the attached image. 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL', then  `Params' 
-%% will contain the mipmap level of the texture object which contains the attached image. 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE' and the texture
-%% object named `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME' is a cube map texture, then  `Params' 
-%%  will contain the cube map face of the cubemap texture object which contains the attached
-%% image. Otherwise  `Params'  will contain the value zero. 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER' and the texture object
-%% named `?GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME' is a layer of a three-dimensional
-%% texture or a one-or two-dimensional array texture, then  `Params'  will contain the
-%% number of the texture layer which contains the attached image. Otherwise  `Params' 
-%% will contain the value zero. 
-%%
-%%  If  `Pname'  is `?GL_FRAMEBUFFER_ATTACHMENT_LAYERED', then  `Params'  will
-%% contain `?GL_TRUE' if an entire level of a three-dimesional texture, cube map texture,
-%% or one-or two-dimensional array texture is attached. Otherwise,  `Params'  will contain
-%% `?GL_FALSE'. 
-%%
-%%  Any combinations of framebuffer type and  `Pname'  not described above will generate
-%% an error. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetFramebufferAttachmentParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetFramebufferAttachmentParameter.xhtml">external</a> documentation.
 -spec getFramebufferAttachmentParameteriv(Target, Attachment, Pname) -> integer() when Target :: enum(),Attachment :: enum(),Pname :: enum().
 getFramebufferAttachmentParameteriv(Target,Attachment,Pname) ->
   call(5665, <<Target:?GLenum,Attachment:?GLenum,Pname:?GLenum>>).
@@ -13808,16 +6401,7 @@ getFramebufferAttachmentParameteriv(Target,Attachment,Pname) ->
 %% the active texture unit. For cube map textures, a `?GL_INVALID_OPERATION' error is
 %% generated if the texture attached to  `Target'  is not cube complete. 
 %%
-%%  Mipmap generation replaces texel array levels  level base+1 through  q with arrays derived
-%% from the  level base array, regardless of their previous contents. All other mimap arrays,
-%% including the  level base array, are left unchanged by this computation. 
-%%
-%%  The internal formats of the derived mipmap arrays all match those of the  level base
-%% array. The contents of the derived arrays are computed by repeated, filtered reduction
-%% of the  level base array. For one- and two-dimensional texture arrays, each layer is filtered
-%% independently. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenerateMipmap.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenerateMipmap.xhtml">external</a> documentation.
 -spec generateMipmap(Target) -> 'ok' when Target :: enum().
 generateMipmap(Target) ->
   cast(5666, <<Target:?GLenum>>).
@@ -13833,33 +6417,7 @@ generateMipmap(Target) ->
 %% by the locations ( `DstX0' ;  `DstY0' ) and ( `DstX1' ;  `DstY1' ). The lower
 %% bounds of the rectangle are inclusive, while the upper bounds are exclusive. 
 %%
-%%  The actual region taken from the read framebuffer is limited to the intersection of the
-%% source buffers being transferred, which may include the color buffer selected by the read
-%% buffer, the depth buffer, and/or the stencil buffer depending on mask. The actual region
-%% written to the draw framebuffer is limited to the intersection of the destination buffers
-%% being written, which may include multiple draw buffers, the depth buffer, and/or the stencil
-%% buffer depending on mask. Whether or not the source or destination regions are altered
-%% due to these limits, the scaling and offset applied to pixels being transferred is performed
-%% as though no such limits were present. 
-%%
-%%  If the sizes of the source and destination rectangles are not equal,  `Filter'  specifies
-%% the interpolation method that will be applied to resize the source image , and must be `?GL_NEAREST'
-%%  or `?GL_LINEAR'. `?GL_LINEAR' is only a valid interpolation method for the
-%% color buffer. If  `Filter'  is not `?GL_NEAREST' and  `Mask'  includes `?GL_DEPTH_BUFFER_BIT'
-%%  or `?GL_STENCIL_BUFFER_BIT', no data is transferred and a `?GL_INVALID_OPERATION'
-%%  error is generated. 
-%%
-%%  If  `Filter'  is `?GL_LINEAR' and the source rectangle would require sampling
-%% outside the bounds of the source framebuffer, values are read as if the `?GL_CLAMP_TO_EDGE'
-%%  texture wrapping mode were applied. 
-%%
-%%  When the color buffer is transferred, values are taken from the read buffer of the read
-%% framebuffer and written to each of the draw buffers of the draw framebuffer. 
-%%
-%%  If the source and destination rectangles overlap or are the same, and the read and draw
-%% buffers are the same, the result of the operation is undefined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBlitFramebuffer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBlitFramebuffer.xhtml">external</a> documentation.
 -spec blitFramebuffer(SrcX0, SrcY0, SrcX1, SrcY1, DstX0, DstY0, DstX1, DstY1, Mask, Filter) -> 'ok' when SrcX0 :: integer(),SrcY0 :: integer(),SrcX1 :: integer(),SrcY1 :: integer(),DstX0 :: integer(),DstY0 :: integer(),DstX1 :: integer(),DstY1 :: integer(),Mask :: integer(),Filter :: enum().
 blitFramebuffer(SrcX0,SrcY0,SrcX1,SrcY1,DstX0,DstY0,DstX1,DstY1,Mask,Filter) ->
   cast(5667, <<SrcX0:?GLint,SrcY0:?GLint,SrcX1:?GLint,SrcY1:?GLint,DstX0:?GLint,DstY0:?GLint,DstX1:?GLint,DstY1:?GLint,Mask:?GLbitfield,Filter:?GLenum>>).
@@ -13869,21 +6427,7 @@ blitFramebuffer(SrcX0,SrcY0,SrcX1,SrcY1,DstX0,DstY0,DstX1,DstY1,Mask,Filter) ->
 %% ``gl:renderbufferStorageMultisample'' establishes the data storage, format, dimensions
 %% and number of samples of a renderbuffer object's image. 
 %%
-%%  The target of the operation, specified by  `Target'  must be `?GL_RENDERBUFFER'.
-%%  `Internalformat'  specifies the internal format to be used for the renderbuffer object's
-%% storage and must be a color-renderable, depth-renderable, or stencil-renderable format.  `Width' 
-%%  and  `Height'  are the dimensions, in pixels, of the renderbuffer. Both  `Width' 
-%% and  `Height'  must be less than or equal to the value of `?GL_MAX_RENDERBUFFER_SIZE'
-%% .  `Samples'  specifies the number of samples to be used for the renderbuffer object's
-%% image, and must be less than or equal to the value of `?GL_MAX_SAMPLES'. If  `Internalformat' 
-%%  is a signed or unsigned integer format then  `Samples'  must be less than or equal
-%% to the value of `?GL_MAX_INTEGER_SAMPLES'. 
-%%
-%%  Upon success, ``gl:renderbufferStorageMultisample'' deletes any existing data store
-%% for the renderbuffer image and the contents of the data store after calling ``gl:renderbufferStorageMultisample''
-%%  are undefined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glRenderbufferStorageMultisample.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glRenderbufferStorageMultisample.xhtml">external</a> documentation.
 -spec renderbufferStorageMultisample(Target, Samples, Internalformat, Width, Height) -> 'ok' when Target :: enum(),Samples :: integer(),Internalformat :: enum(),Width :: integer(),Height :: integer().
 renderbufferStorageMultisample(Target,Samples,Internalformat,Width,Height) ->
   cast(5668, <<Target:?GLenum,Samples:?GLsizei,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei>>).
@@ -13909,7 +6453,7 @@ framebufferTextureFaceARB(Target,Attachment,Texture,Level,Face) ->
 %% mapped range of the buffer. ``gl:flushMappedBufferRange'' may be called multiple times
 %% to indicate distinct subranges of the mapping which require flushing. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFlushMappedBufferRange.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFlushMappedBufferRange.xhtml">external</a> documentation.
 -spec flushMappedBufferRange(Target, Offset, Length) -> 'ok' when Target :: enum(),Offset :: integer(),Length :: integer().
 flushMappedBufferRange(Target,Offset,Length) ->
   cast(5671, <<Target:?GLenum,0:32,Offset:?GLintptr,Length:?GLsizeiptr>>).
@@ -13920,11 +6464,7 @@ flushMappedBufferRange(Target,Offset,Length) ->
 %%  is the name of a vertex array object previously returned from a call to  {@link gl:genVertexArrays/1} 
 %% , or zero to break the existing vertex array object binding. 
 %%
-%%  If no vertex array object with name  `Array'  exists, one is created when  `Array' 
-%% is first bound. If the bind is successful no change is made to the state of the vertex
-%% array object, and any previous vertex array object binding is broken. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindVertexArray.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindVertexArray.xhtml">external</a> documentation.
 -spec bindVertexArray(Array) -> 'ok' when Array :: integer().
 bindVertexArray(Array) ->
   cast(5672, <<Array:?GLuint>>).
@@ -13937,7 +6477,7 @@ bindVertexArray(Array) ->
 %% is deleted, the binding for that object reverts to zero and the default vertex array becomes
 %% current. Unused names in  `Arrays'  are silently ignored, as is the value zero. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteVertexArrays.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteVertexArrays.xhtml">external</a> documentation.
 -spec deleteVertexArrays(Arrays) -> 'ok' when Arrays :: [integer()].
 deleteVertexArrays(Arrays) ->
   ArraysLen = length(Arrays),
@@ -13951,13 +6491,7 @@ deleteVertexArrays(Arrays) ->
 %% guaranteed that none of the returned names was in use immediately before the call to ``gl:genVertexArrays''
 %% . 
 %%
-%%  Vertex array object names returned by a call to ``gl:genVertexArrays'' are not returned
-%% by subsequent calls, unless they are first deleted with  {@link gl:deleteVertexArrays/1} . 
-%%
-%%  The names returned in  `Arrays'  are marked as used, for the purposes of ``gl:genVertexArrays''
-%%  only, but they acquire state and type only when they are first bound. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenVertexArrays.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenVertexArrays.xhtml">external</a> documentation.
 -spec genVertexArrays(N) -> [integer()] when N :: integer().
 genVertexArrays(N) ->
   call(5674, <<N:?GLsizei>>).
@@ -13971,7 +6505,7 @@ genVertexArrays(N) ->
 %% been bound through a call to  {@link gl:bindVertexArray/1} , then the name is not a vertex
 %% array object and ``gl:isVertexArray'' returns `?GL_FALSE'. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsVertexArray.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsVertexArray.xhtml">external</a> documentation.
 -spec isVertexArray(Array) -> 0|1 when Array :: integer().
 isVertexArray(Array) ->
   call(5675, <<Array:?GLuint>>).
@@ -13981,24 +6515,7 @@ isVertexArray(Array) ->
 %% ``gl:getUniformIndices'' retrieves the indices of a number of uniforms within  `Program' 
 %% . 
 %%
-%%  `Program'  must be the name of a program object for which the command  {@link gl:linkProgram/1} 
-%%  must have been called in the past, although it is not required that  {@link gl:linkProgram/1} 
-%%  must have succeeded. The link could have failed because the number of active uniforms
-%% exceeded the limit. 
-%%
-%%  `UniformCount'  indicates both the number of elements in the array of names  `UniformNames' 
-%%  and the number of indices that may be written to  `UniformIndices' . 
-%%
-%%  `UniformNames'  contains a list of  `UniformCount'  name strings identifying the
-%% uniform names to be queried for indices. For each name string in  `UniformNames' ,
-%% the index assigned to the active uniform of that name will be written to the corresponding
-%% element of  `UniformIndices' . If a string in  `UniformNames'  is not the name of
-%% an active uniform, the special value `?GL_INVALID_INDEX' will be written to the corresponding
-%% element of  `UniformIndices' . 
-%%
-%%  If an error occurs, nothing is written to  `UniformIndices' . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformIndices.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetUniformIndices.xhtml">external</a> documentation.
 -spec getUniformIndices(Program, UniformNames) -> [integer()] when Program :: integer(),UniformNames :: iolist().
 getUniformIndices(Program,UniformNames) ->
   UniformNamesTemp = list_to_binary([[Str|[0]] || Str <- UniformNames ]),
@@ -14007,7 +6524,7 @@ getUniformIndices(Program,UniformNames) ->
 
 %% @doc glGetActiveUniforms
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveUniforms.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getActiveUniformsiv(Program, UniformIndices, Pname) -> [integer()] when Program :: integer(),UniformIndices :: [integer()],Pname :: enum().
 getActiveUniformsiv(Program,UniformIndices,Pname) ->
   UniformIndicesLen = length(UniformIndices),
@@ -14026,19 +6543,7 @@ getActiveUniformsiv(Program,UniformIndices,Pname) ->
 %% is given by the value of `?GL_ACTIVE_UNIFORM_MAX_LENGTH', which can be queried with  {@link gl:getProgramiv/2} 
 %% . 
 %%
-%%  If ``gl:getActiveUniformName'' is not successful, nothing is written to  `Length' 
-%% or  `UniformName' . 
-%%
-%%  `Program'  must be the name of a program for which the command  {@link gl:linkProgram/1} 
-%% has been issued in the past. It is not necessary for  `Program'  to have been linked
-%% successfully. The link could have failed because the number of active uniforms exceeded
-%% the limit. 
-%%
-%%  `UniformIndex'  must be an active uniform index of the program  `Program' , in
-%% the range zero to `?GL_ACTIVE_UNIFORMS' - 1. The value of `?GL_ACTIVE_UNIFORMS'
-%% can be queried with  {@link gl:getProgramiv/2} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveUniformName.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveUniformName.xhtml">external</a> documentation.
 -spec getActiveUniformName(Program, UniformIndex, BufSize) -> string() when Program :: integer(),UniformIndex :: integer(),BufSize :: integer().
 getActiveUniformName(Program,UniformIndex,BufSize) ->
   call(5678, <<Program:?GLuint,UniformIndex:?GLuint,BufSize:?GLsizei>>).
@@ -14048,21 +6553,7 @@ getActiveUniformName(Program,UniformIndex,BufSize) ->
 %% ``gl:getUniformBlockIndex'' retrieves the index of a uniform block within  `Program' .
 %% 
 %%
-%%  `Program'  must be the name of a program object for which the command  {@link gl:linkProgram/1} 
-%%  must have been called in the past, although it is not required that  {@link gl:linkProgram/1} 
-%%  must have succeeded. The link could have failed because the number of active uniforms
-%% exceeded the limit. 
-%%
-%%  `UniformBlockName'  must contain a nul-terminated string specifying the name of the
-%% uniform block. 
-%%
-%% ``gl:getUniformBlockIndex'' returns the uniform block index for the uniform block named
-%%  `UniformBlockName'  of  `Program' . If  `UniformBlockName'  does not identify
-%% an active uniform block of  `Program' , ``gl:getUniformBlockIndex'' returns the special
-%% identifier, `?GL_INVALID_INDEX'. Indices of the active uniform blocks of a program
-%% are assigned in consecutive order, beginning with zero. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformBlockIndex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetUniformBlockIndex.xhtml">external</a> documentation.
 -spec getUniformBlockIndex(Program, UniformBlockName) -> integer() when Program :: integer(),UniformBlockName :: string().
 getUniformBlockIndex(Program,UniformBlockName) ->
   UniformBlockNameLen = length(UniformBlockName),
@@ -14073,49 +6564,7 @@ getUniformBlockIndex(Program,UniformBlockName) ->
 %% ``gl:getActiveUniformBlockiv'' retrieves information about an active uniform block within
 %%  `Program' . 
 %%
-%%  `Program'  must be the name of a program object for which the command  {@link gl:linkProgram/1} 
-%%  must have been called in the past, although it is not required that  {@link gl:linkProgram/1} 
-%%  must have succeeded. The link could have failed because the number of active uniforms
-%% exceeded the limit. 
-%%
-%%  `UniformBlockIndex'  is an active uniform block index of  `Program' , and must
-%% be less than the value of `?GL_ACTIVE_UNIFORM_BLOCKS'. 
-%%
-%%  Upon success, the uniform block parameter(s) specified by  `Pname'  are returned in  `Params' 
-%% . If an error occurs, nothing will be written to  `Params' . 
-%%
-%%  If  `Pname'  is `?GL_UNIFORM_BLOCK_BINDING', then the index of the uniform buffer
-%% binding point last selected by the uniform block specified by  `UniformBlockIndex' 
-%% for  `Program'  is returned. If no uniform block has been previously specified, zero
-%% is returned. 
-%%
-%%  If  `Pname'  is `?GL_UNIFORM_BLOCK_DATA_SIZE', then the implementation-dependent
-%% minimum total buffer object size, in basic machine units, required to hold all active
-%% uniforms in the uniform block identified by  `UniformBlockIndex'  is returned. It is
-%% neither guaranteed nor expected that a given implementation will arrange uniform values
-%% as tightly packed in a buffer object. The exception to this is the `std140 uniform block layout'
-%% , which guarantees specific packing behavior and does not require the application to query
-%% for offsets and strides. In this case the minimum size may still be queried, even though
-%% it is determined in advance based only on the uniform block declaration. 
-%%
-%%  If  `Pname'  is `?GL_UNIFORM_BLOCK_NAME_LENGTH', then the total length (including
-%% the nul terminator) of the name of the uniform block identified by  `UniformBlockIndex' 
-%%  is returned. 
-%%
-%%  If  `Pname'  is `?GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS', then the number of active
-%% uniforms in the uniform block identified by  `UniformBlockIndex'  is returned. 
-%%
-%%  If  `Pname'  is `?GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES', then a list of the
-%% active uniform indices for the uniform block identified by  `UniformBlockIndex'  is
-%% returned. The number of elements that will be written to  `Params'  is the value of `?GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS'
-%%  for  `UniformBlockIndex' . 
-%%
-%%  If  `Pname'  is `?GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER', `?GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER'
-%% , or `?GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER', then a boolean value indicating
-%% whether the uniform block identified by  `UniformBlockIndex'  is referenced by the
-%% vertex, geometry, or fragment programming stages of program, respectively, is returned. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveUniformBlock.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveUniformBlock.xhtml">external</a> documentation.
 -spec getActiveUniformBlockiv(Program, UniformBlockIndex, Pname, Params) -> 'ok' when Program :: integer(),UniformBlockIndex :: integer(),Pname :: enum(),Params :: mem().
 getActiveUniformBlockiv(Program,UniformBlockIndex,Pname,Params) ->
   send_bin(Params),
@@ -14126,26 +6575,7 @@ getActiveUniformBlockiv(Program,UniformBlockIndex,Pname,Params) ->
 %% ``gl:getActiveUniformBlockName'' retrieves the name of the active uniform block at  `UniformBlockIndex' 
 %%  within  `Program' . 
 %%
-%%  `Program'  must be the name of a program object for which the command  {@link gl:linkProgram/1} 
-%%  must have been called in the past, although it is not required that  {@link gl:linkProgram/1} 
-%%  must have succeeded. The link could have failed because the number of active uniforms
-%% exceeded the limit. 
-%%
-%%  `UniformBlockIndex'  is an active uniform block index of  `Program' , and must
-%% be less than the value of `?GL_ACTIVE_UNIFORM_BLOCKS'. 
-%%
-%%  Upon success, the name of the uniform block identified by  `UnifomBlockIndex'  is
-%% returned into  `UniformBlockName' . The name is nul-terminated. The actual number of
-%% characters written into  `UniformBlockName' , excluding the nul terminator, is returned
-%% in  `Length' . If  `Length'  is NULL, no length is returned. 
-%%
-%%  `BufSize'  contains the maximum number of characters (including the nul terminator)
-%% that will be written into  `UniformBlockName' . 
-%%
-%%  If an error occurs, nothing will be written to  `UniformBlockName'  or  `Length' .
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveUniformBlockName.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveUniformBlockName.xhtml">external</a> documentation.
 -spec getActiveUniformBlockName(Program, UniformBlockIndex, BufSize) -> string() when Program :: integer(),UniformBlockIndex :: integer(),BufSize :: integer().
 getActiveUniformBlockName(Program,UniformBlockIndex,BufSize) ->
   call(5681, <<Program:?GLuint,UniformBlockIndex:?GLuint,BufSize:?GLsizei>>).
@@ -14157,15 +6587,7 @@ getActiveUniformBlockName(Program,UniformBlockIndex,BufSize) ->
 %%  `Program'  is the name of a program object for which the command  {@link gl:linkProgram/1} 
 %%  has been issued in the past. 
 %%
-%%  If successful, ``gl:uniformBlockBinding'' specifies that  `Program'  will use the
-%% data store of the buffer object bound to the binding point  `UniformBlockBinding' 
-%% to extract the values of the uniforms in the uniform block identified by  `UniformBlockIndex' 
-%% . 
-%%
-%%  When a program object is linked or re-linked, the uniform buffer object binding point
-%% assigned to each of its active uniform blocks is reset to zero. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glUniformBlockBinding.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glUniformBlockBinding.xhtml">external</a> documentation.
 -spec uniformBlockBinding(Program, UniformBlockIndex, UniformBlockBinding) -> 'ok' when Program :: integer(),UniformBlockIndex :: integer(),UniformBlockBinding :: integer().
 uniformBlockBinding(Program,UniformBlockIndex,UniformBlockBinding) ->
   cast(5682, <<Program:?GLuint,UniformBlockIndex:?GLuint,UniformBlockBinding:?GLuint>>).
@@ -14177,21 +6599,7 @@ uniformBlockBinding(Program,UniformBlockIndex,UniformBlockBinding) ->
 %% by  `Size'  is copied from the source, at offset  `Readoffset'  to the destination
 %% at  `Writeoffset' , also in basic machine units. 
 %%
-%%  `Readtarget'  and  `Writetarget'  must be `?GL_ARRAY_BUFFER', `?GL_COPY_READ_BUFFER'
-%% , `?GL_COPY_WRITE_BUFFER', `?GL_ELEMENT_ARRAY_BUFFER', `?GL_PIXEL_PACK_BUFFER'
-%% , `?GL_PIXEL_UNPACK_BUFFER', `?GL_TEXTURE_BUFFER', `?GL_TRANSFORM_FEEDBACK_BUFFER'
-%%  or `?GL_UNIFORM_BUFFER'. Any of these targets may be used, although the targets `?GL_COPY_READ_BUFFER'
-%%  and `?GL_COPY_WRITE_BUFFER' are provided specifically to allow copies between buffers
-%% without disturbing other GL state. 
-%%
-%%  `Readoffset' ,  `Writeoffset'  and  `Size'  must all be greater than or equal
-%% to zero. Furthermore,  `Readoffset'  +  `Size'  must not exceeed the size of the
-%% buffer object bound to  `Readtarget' , and  `Readoffset'  +  `Size'  must not
-%% exceeed the size of the buffer bound to  `Writetarget' . If the same buffer object
-%% is bound to both  `Readtarget'  and  `Writetarget' , then the ranges specified by  `Readoffset' 
-%% ,  `Writeoffset'  and  `Size'  must not overlap. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCopyBufferSubData.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCopyBufferSubData.xhtml">external</a> documentation.
 -spec copyBufferSubData(ReadTarget, WriteTarget, ReadOffset, WriteOffset, Size) -> 'ok' when ReadTarget :: enum(),WriteTarget :: enum(),ReadOffset :: integer(),WriteOffset :: integer(),Size :: integer().
 copyBufferSubData(ReadTarget,WriteTarget,ReadOffset,WriteOffset,Size) ->
   cast(5683, <<ReadTarget:?GLenum,WriteTarget:?GLenum,ReadOffset:?GLintptr,WriteOffset:?GLintptr,Size:?GLsizeiptr>>).
@@ -14205,7 +6613,7 @@ copyBufferSubData(ReadTarget,WriteTarget,ReadOffset,WriteOffset,Size) ->
 %% were upconverted to 32-bit unsigned integers (with wrapping on overflow conditions). The
 %% operation is undefined if the sum would be negative. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElementsBaseVertex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawElementsBaseVertex.xhtml">external</a> documentation.
 -spec drawElementsBaseVertex(Mode, Count, Type, Indices, Basevertex) -> 'ok' when Mode :: enum(),Count :: integer(),Type :: enum(),Indices :: offset()|mem(),Basevertex :: integer().
 drawElementsBaseVertex(Mode,Count,Type,Indices,Basevertex) when  is_integer(Indices) ->
   cast(5684, <<Mode:?GLenum,Count:?GLsizei,Type:?GLenum,Indices:?GLuint,Basevertex:?GLint>>);
@@ -14227,7 +6635,7 @@ drawElementsBaseVertex(Mode,Count,Type,Indices,Basevertex) ->
 %% to 32-bit unsigned integers (with wrapping on overflow conditions). The operation is undefined
 %% if the sum would be negative. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawRangeElementsBaseVertex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawRangeElementsBaseVertex.xhtml">external</a> documentation.
 -spec drawRangeElementsBaseVertex(Mode, Start, End, Count, Type, Indices, Basevertex) -> 'ok' when Mode :: enum(),Start :: integer(),End :: integer(),Count :: integer(),Type :: enum(),Indices :: offset()|mem(),Basevertex :: integer().
 drawRangeElementsBaseVertex(Mode,Start,End,Count,Type,Indices,Basevertex) when  is_integer(Indices) ->
   cast(5686, <<Mode:?GLenum,Start:?GLuint,End:?GLuint,Count:?GLsizei,Type:?GLenum,Indices:?GLuint,Basevertex:?GLint>>);
@@ -14244,7 +6652,7 @@ drawRangeElementsBaseVertex(Mode,Start,End,Count,Type,Indices,Basevertex) ->
 %% if the calculation were upconverted to 32-bit unsigned integers (with wrapping on overflow
 %% conditions). The operation is undefined if the sum would be negative. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElementsInstancedBaseVertex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawElementsInstancedBaseVertex.xhtml">external</a> documentation.
 -spec drawElementsInstancedBaseVertex(Mode, Count, Type, Indices, Primcount, Basevertex) -> 'ok' when Mode :: enum(),Count :: integer(),Type :: enum(),Indices :: offset()|mem(),Primcount :: integer(),Basevertex :: integer().
 drawElementsInstancedBaseVertex(Mode,Count,Type,Indices,Primcount,Basevertex) when  is_integer(Indices) ->
   cast(5688, <<Mode:?GLenum,Count:?GLsizei,Type:?GLenum,Indices:?GLuint,Primcount:?GLsizei,Basevertex:?GLint>>);
@@ -14259,29 +6667,7 @@ drawElementsInstancedBaseVertex(Mode,Count,Type,Indices,Primcount,Basevertex) ->
 %% as the `provoking vertex' and ``gl:provokingVertex'' specifies which vertex is
 %% to be used as the source of data for flat shaded varyings. 
 %%
-%%  `ProvokeMode'  must be either `?GL_FIRST_VERTEX_CONVENTION' or `?GL_LAST_VERTEX_CONVENTION'
-%% , and controls the selection of the vertex whose values are assigned to flatshaded varying
-%% outputs. The interpretation of these values for the supported primitive types is: <table><tbody>
-%% <tr><td>` Primitive Type of Polygon '`i'</td><td>` First Vertex Convention '
-%% </td><td>` Last Vertex Convention '</td></tr><tr><td> point </td><td>`i'</td><td>
-%% `i'</td></tr><tr><td> independent line </td><td> 2`i' - 1 </td><td> 2`i'</td>
-%% </tr><tr><td> line loop </td><td>`i'</td><td>
-%%
-%% `i' + 1, if `i' &lt; `n'
-%%
-%%  1, if `i' = `n'</td></tr><tr><td> line strip </td><td>`i'</td><td>`i'
-%% + 1 </td></tr><tr><td> independent triangle </td><td> 3`i' - 2 </td><td> 3`i'</td>
-%% </tr><tr><td> triangle strip </td><td>`i'</td><td>`i' + 2 </td></tr><tr><td>
-%% triangle fan </td><td>`i' + 1 </td><td>`i' + 2 </td></tr><tr><td> line adjacency
-%% </td><td> 4`i' - 2 </td><td> 4`i' - 1 </td></tr><tr><td> line strip adjacency </td>
-%% <td>`i' + 1 </td><td>`i' + 2 </td></tr><tr><td> triangle adjacency </td><td> 6`i'
-%%  - 5 </td><td> 6`i' - 1 </td></tr><tr><td> triangle strip adjacency </td><td> 2`i'
-%%  - 1 </td><td> 2`i' + 3 </td></tr></tbody></table>
-%%
-%%  If a vertex or geometry shader is active, user-defined varying outputs may be flatshaded
-%% by using the flat qualifier when declaring the output. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProvokingVertex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glProvokingVertex.xhtml">external</a> documentation.
 -spec provokingVertex(Mode) -> 'ok' when Mode :: enum().
 provokingVertex(Mode) ->
   cast(5690, <<Mode:?GLenum>>).
@@ -14292,20 +6678,7 @@ provokingVertex(Mode) ->
 %% command stream and associates it with that sync object, and returns a non-zero name corresponding
 %% to the sync object. 
 %%
-%%  When the specified  `Condition'  of the sync object is satisfied by the fence command,
-%% the sync object is signaled by the GL, causing any  {@link gl:waitSync/3} ,  {@link gl:clientWaitSync/3} 
-%%  commands blocking in  `Sync'  to `unblock'. No other state is affected by ``gl:fenceSync''
-%%  or by the execution of the associated fence command. 
-%%
-%%  `Condition'  must be `?GL_SYNC_GPU_COMMANDS_COMPLETE'. This condition is satisfied
-%% by  completion of the fence command corresponding to the sync object and all preceding
-%% commands in the same command stream. The sync object will not be signaled until all effects
-%% from these commands on GL client and server state and the framebuffer are fully realized.
-%% Note that completion of the fence command occurs once the state of the corresponding sync
-%% object has been changed, but commands waiting on that sync object may not be unblocked
-%% until after the fence command completes. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glFenceSync.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glFenceSync.xhtml">external</a> documentation.
 -spec fenceSync(Condition, Flags) -> integer() when Condition :: enum(),Flags :: integer().
 fenceSync(Condition,Flags) ->
   call(5691, <<Condition:?GLenum,Flags:?GLbitfield>>).
@@ -14316,7 +6689,7 @@ fenceSync(Condition,Flags) ->
 %% object. If  `Sync'  is not the name of a sync object, or if an error occurs, ``gl:isSync''
 %%  returns `?GL_FALSE'. Note that zero is not the name of a sync object. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsSync.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsSync.xhtml">external</a> documentation.
 -spec isSync(Sync) -> 0|1 when Sync :: integer().
 isSync(Sync) ->
   call(5692, <<Sync:?GLsync>>).
@@ -14331,9 +6704,7 @@ isSync(Sync) ->
 %%  or  {@link gl:clientWaitSync/3}  command. In either case, after ``gl:deleteSync'' returns,
 %% the name  `Sync'  is invalid and can no longer be used to refer to the sync object. 
 %%
-%% ``gl:deleteSync'' will silently ignore a  `Sync'  value of zero. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteSync.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteSync.xhtml">external</a> documentation.
 -spec deleteSync(Sync) -> 'ok' when Sync :: integer().
 deleteSync(Sync) ->
   cast(5693, <<Sync:?GLsync>>).
@@ -14345,21 +6716,7 @@ deleteSync(Sync) ->
 %% is called, ``gl:clientWaitSync'' returns immediately, otherwise it will block and wait
 %% for up to  `Timeout'  nanoseconds for  `Sync'  to become signaled. 
 %%
-%%  The return value is one of four status values: 
-%%
-%% `?GL_ALREADY_SIGNALED' indicates that  `Sync'  was signaled at the time that ``gl:clientWaitSync''
-%%  was called. 
-%%
-%% `?GL_TIMEOUT_EXPIRED' indicates that at least  `Timeout'  nanoseconds passed and  `Sync' 
-%%  did not become signaled. 
-%%
-%% `?GL_CONDITION_SATISFIED' indicates that  `Sync'  was signaled before the timeout
-%% expired. 
-%%
-%% `?GL_WAIT_FAILED' indicates that an error occurred. Additionally, an OpenGL error
-%% will be generated. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClientWaitSync.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glClientWaitSync.xhtml">external</a> documentation.
 -spec clientWaitSync(Sync, Flags, Timeout) -> enum() when Sync :: integer(),Flags :: integer(),Timeout :: integer().
 clientWaitSync(Sync,Flags,Timeout) ->
   call(5694, <<Sync:?GLsync,Flags:?GLbitfield,0:32,Timeout:?GLuint64>>).
@@ -14373,15 +6730,9 @@ clientWaitSync(Sync,Flags,Timeout) ->
 %%
 %%  `Flags'  and  `Timeout'  are placeholders for anticipated future extensions of
 %% sync object capabilities. They must have these reserved values in order that existing
-%% code calling ``gl:waitSync'' operate properly in the presence of such extensions.. ``gl:waitSync''
-%%  will always wait no longer than an implementation-dependent timeout. The duration of
-%% this timeout in nanoseconds may be queried by calling  {@link gl:getBooleanv/1}  with the parameter `?GL_MAX_SERVER_WAIT_TIMEOUT'
-%% . There is currently no way to determine whether ``gl:waitSync'' unblocked because the
-%% timeout expired or because the sync object being waited on was signaled. 
-%%
-%%  If an error occurs, ``gl:waitSync'' does not cause the GL server to block. 
+%% code calling ``gl:waitSync'' operate properly in the presence of such extensions.
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glWaitSync.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glWaitSync.xhtml">external</a> documentation.
 -spec waitSync(Sync, Flags, Timeout) -> 'ok' when Sync :: integer(),Flags :: integer(),Timeout :: integer().
 waitSync(Sync,Flags,Timeout) ->
   cast(5695, <<Sync:?GLsync,Flags:?GLbitfield,0:32,Timeout:?GLuint64>>).
@@ -14397,32 +6748,7 @@ getInteger64v(Pname) ->
 %% ``gl:getSynciv'' retrieves properties of a sync object.  `Sync'  specifies the name
 %% of the sync object whose properties to retrieve. 
 %%
-%%  On success, ``gl:getSynciv'' replaces up to  `BufSize'  integers in  `Values' 
-%% with the corresponding property values of the object being queried. The actual number
-%% of integers replaced is returned in the variable whose address is specified in  `Length' 
-%% . If  `Length'  is NULL, no length is returned. 
-%%
-%%  If  `Pname'  is `?GL_OBJECT_TYPE', a single value representing the specific type
-%% of the sync object is placed in  `Values' . The only type supported is `?GL_SYNC_FENCE'
-%% . 
-%%
-%%  If  `Pname'  is `?GL_SYNC_STATUS', a single value representing the status of
-%% the sync object (`?GL_SIGNALED' or `?GL_UNSIGNALED') is placed in  `Values' .
-%% 
-%%
-%%  If  `Pname'  is `?GL_SYNC_CONDITION', a single value representing the condition
-%% of the sync object is placed in  `Values' . The only condition supported is `?GL_SYNC_GPU_COMMANDS_COMPLETE'
-%% . 
-%%
-%%  If  `Pname'  is `?GL_SYNC_FLAGS', a single value representing the flags with
-%% which the sync object was created is placed in  `Values' . No flags are currently supported
-%% 
-%%
-%%  `Flags'  is expected to be used in future extensions to the sync objects.. 
-%%
-%%  If an error occurs, nothing will be written to  `Values'  or  `Length' . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetSync.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetSync.xhtml">external</a> documentation.
 -spec getSynciv(Sync, Pname, BufSize) -> [integer()] when Sync :: integer(),Pname :: enum(),BufSize :: integer().
 getSynciv(Sync,Pname,BufSize) ->
   call(5697, <<Sync:?GLsync,Pname:?GLenum,BufSize:?GLsizei>>).
@@ -14432,25 +6758,7 @@ getSynciv(Sync,Pname,BufSize) ->
 %% ``gl:texImage2DMultisample'' establishes the data storage, format, dimensions and number
 %% of samples of a multisample texture's image. 
 %%
-%%  `Target'  must be `?GL_TEXTURE_2D_MULTISAMPLE' or `?GL_PROXY_TEXTURE_2D_MULTISAMPLE'
-%% .  `Width'  and  `Height'  are the dimensions in texels of the texture, and must
-%% be in the range zero to `?GL_MAX_TEXTURE_SIZE' - 1.  `Samples'  specifies the
-%% number of samples in the image and must be in the range zero to `?GL_MAX_SAMPLES'
-%% - 1. 
-%%
-%%  `Internalformat'  must be a color-renderable, depth-renderable, or stencil-renderable
-%% format. 
-%%
-%%  If  `Fixedsamplelocations'  is `?GL_TRUE', the image will use identical sample
-%% locations and the same number of samples for all texels in the image, and the sample locations
-%% will not depend on the internal format or size of the image. 
-%%
-%%  When a multisample texture is accessed in a shader, the access takes one vector of integers
-%% describing which texel to fetch and an integer corresponding to the sample numbers describing
-%% which sample within the texel to fetch. No standard sampling instructions are allowed
-%% on the multisample texture targets. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexImage2DMultisample.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexImage2DMultisample.xhtml">external</a> documentation.
 -spec texImage2DMultisample(Target, Samples, Internalformat, Width, Height, Fixedsamplelocations) -> 'ok' when Target :: enum(),Samples :: integer(),Internalformat :: integer(),Width :: integer(),Height :: integer(),Fixedsamplelocations :: 0|1.
 texImage2DMultisample(Target,Samples,Internalformat,Width,Height,Fixedsamplelocations) ->
   cast(5698, <<Target:?GLenum,Samples:?GLsizei,Internalformat:?GLint,Width:?GLsizei,Height:?GLsizei,Fixedsamplelocations:?GLboolean>>).
@@ -14460,25 +6768,7 @@ texImage2DMultisample(Target,Samples,Internalformat,Width,Height,Fixedsampleloca
 %% ``gl:texImage3DMultisample'' establishes the data storage, format, dimensions and number
 %% of samples of a multisample texture's image. 
 %%
-%%  `Target'  must be `?GL_TEXTURE_2D_MULTISAMPLE_ARRAY' or `?GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY'
-%% .  `Width'  and  `Height' are the dimensions in texels of the texture, and must
-%% be in the range zero to `?GL_MAX_TEXTURE_SIZE' - 1.  `Depth'  is the number of
-%% array slices in the array texture's image.  `Samples'  specifies the number of samples
-%% in the image and must be in the range zero to `?GL_MAX_SAMPLES' - 1. 
-%%
-%%  `Internalformat'  must be a color-renderable, depth-renderable, or stencil-renderable
-%% format. 
-%%
-%%  If  `Fixedsamplelocations'  is `?GL_TRUE', the image will use identical sample
-%% locations and the same number of samples for all texels in the image, and the sample locations
-%% will not depend on the internal format or size of the image. 
-%%
-%%  When a multisample texture is accessed in a shader, the access takes one vector of integers
-%% describing which texel to fetch and an integer corresponding to the sample numbers describing
-%% which sample within the texel to fetch. No standard sampling instructions are allowed
-%% on the multisample texture targets. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexImage3DMultisample.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexImage3DMultisample.xhtml">external</a> documentation.
 -spec texImage3DMultisample(Target, Samples, Internalformat, Width, Height, Depth, Fixedsamplelocations) -> 'ok' when Target :: enum(),Samples :: integer(),Internalformat :: integer(),Width :: integer(),Height :: integer(),Depth :: integer(),Fixedsamplelocations :: 0|1.
 texImage3DMultisample(Target,Samples,Internalformat,Width,Height,Depth,Fixedsamplelocations) ->
   cast(5699, <<Target:?GLenum,Samples:?GLsizei,Internalformat:?GLint,Width:?GLsizei,Height:?GLsizei,Depth:?GLsizei,Fixedsamplelocations:?GLboolean>>).
@@ -14493,10 +6783,7 @@ texImage3DMultisample(Target,Samples,Internalformat,Width,Height,Depth,Fixedsamp
 %% space of that sample. (0.5, 0.5) this corresponds to the pixel center.  `Index'  must
 %% be between zero and the value of `?GL_SAMPLES' - 1. 
 %%
-%%  If the multisample mode does not have fixed sample locations, the returned values may
-%% only reflect the locations of samples within some pixels. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetMultisample.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetMultisample.xhtml">external</a> documentation.
 -spec getMultisamplefv(Pname, Index) -> {float(),float()} when Pname :: enum(),Index :: integer().
 getMultisamplefv(Pname,Index) ->
   call(5700, <<Pname:?GLenum,Index:?GLuint>>).
@@ -14506,19 +6793,14 @@ getMultisamplefv(Pname,Index) ->
 %% ``gl:sampleMaski'' sets one 32-bit sub-word of the multi-word sample mask, `?GL_SAMPLE_MASK_VALUE'
 %% . 
 %%
-%%  `MaskIndex'  specifies which 32-bit sub-word of the sample mask to update, and  `Mask' 
-%%  specifies the new value to use for that sub-word.  `MaskIndex'  must be less than
-%% the value of `?GL_MAX_SAMPLE_MASK_WORDS'. Bit `B' of mask word `M' corresponds
-%% to sample 32 x `M' + `B'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSampleMaski.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glSampleMaski.xhtml">external</a> documentation.
 -spec sampleMaski(Index, Mask) -> 'ok' when Index :: integer(),Mask :: integer().
 sampleMaski(Index,Mask) ->
   cast(5701, <<Index:?GLuint,Mask:?GLbitfield>>).
 
 %% @doc glNamedStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glNamedStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec namedStringARB(Type, Name, String) -> 'ok' when Type :: enum(),Name :: string(),String :: string().
 namedStringARB(Type,Name,String) ->
   NameLen = length(Name),
@@ -14527,7 +6809,7 @@ namedStringARB(Type,Name,String) ->
 
 %% @doc glDeleteNamedStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteNamedStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec deleteNamedStringARB(Name) -> 'ok' when Name :: string().
 deleteNamedStringARB(Name) ->
   NameLen = length(Name),
@@ -14535,7 +6817,7 @@ deleteNamedStringARB(Name) ->
 
 %% @doc glCompileShaderIncludeARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCompileShaderIncludeARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec compileShaderIncludeARB(Shader, Path) -> 'ok' when Shader :: integer(),Path :: iolist().
 compileShaderIncludeARB(Shader,Path) ->
   PathTemp = list_to_binary([[Str|[0]] || Str <- Path ]),
@@ -14544,7 +6826,7 @@ compileShaderIncludeARB(Shader,Path) ->
 
 %% @doc glIsNamedStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsNamedStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec isNamedStringARB(Name) -> 0|1 when Name :: string().
 isNamedStringARB(Name) ->
   NameLen = length(Name),
@@ -14552,7 +6834,7 @@ isNamedStringARB(Name) ->
 
 %% @doc glGetNamedStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetNamedStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getNamedStringARB(Name, BufSize) -> string() when Name :: string(),BufSize :: integer().
 getNamedStringARB(Name,BufSize) ->
   NameLen = length(Name),
@@ -14560,7 +6842,7 @@ getNamedStringARB(Name,BufSize) ->
 
 %% @doc glGetNamedStringARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetNamedStringARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getNamedStringivARB(Name, Pname) -> integer() when Name :: string(),Pname :: enum().
 getNamedStringivARB(Name,Pname) ->
   NameLen = length(Name),
@@ -14568,7 +6850,7 @@ getNamedStringivARB(Name,Pname) ->
 
 %% @doc glBindFragDataLocationIndexe
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindFragDataLocationIndexe.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec bindFragDataLocationIndexed(Program, ColorNumber, Index, Name) -> 'ok' when Program :: integer(),ColorNumber :: integer(),Index :: integer(),Name :: string().
 bindFragDataLocationIndexed(Program,ColorNumber,Index,Name) ->
   NameLen = length(Name),
@@ -14580,7 +6862,7 @@ bindFragDataLocationIndexed(Program,ColorNumber,Index,Name) ->
 %%  was bound when the program object  `Program'  was last linked. If  `Name'  is not
 %% a varying out variable of  `Program' , or if an error occurs, -1 will be returned. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetFragDataIndex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetFragDataIndex.xhtml">external</a> documentation.
 -spec getFragDataIndex(Program, Name) -> integer() when Program :: integer(),Name :: string().
 getFragDataIndex(Program,Name) ->
   NameLen = length(Name),
@@ -14593,13 +6875,7 @@ getFragDataIndex(Program,Name) ->
 %% that none of the returned names was in use immediately before the call to ``gl:genSamplers''
 %% . 
 %%
-%%  Sampler object names returned by a call to ``gl:genSamplers'' are not returned by subsequent
-%% calls, unless they are first deleted with  {@link gl:deleteSamplers/1} . 
-%%
-%%  The names returned in  `Samplers'  are marked as used, for the purposes of ``gl:genSamplers''
-%%  only, but they acquire state and type only when they are first bound. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenSamplers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenSamplers.xhtml">external</a> documentation.
 -spec genSamplers(Count) -> [integer()] when Count :: integer().
 genSamplers(Count) ->
   call(5710, <<Count:?GLsizei>>).
@@ -14612,7 +6888,7 @@ genSamplers(Count) ->
 %%  is called with unit set to the unit the sampler is bound to and sampler zero. Unused
 %% names in samplers are silently ignored, as is the reserved name zero. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteSamplers.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteSamplers.xhtml">external</a> documentation.
 -spec deleteSamplers(Samplers) -> 'ok' when Samplers :: [integer()].
 deleteSamplers(Samplers) ->
   SamplersLen = length(Samplers),
@@ -14625,9 +6901,7 @@ deleteSamplers(Samplers) ->
 %% object. If  `Id'  is zero, or is a non-zero value that is not currently the name of
 %% a sampler object, or if an error occurs, ``gl:isSampler'' returns `?GL_FALSE'. 
 %%
-%%  A name returned by  {@link gl:genSamplers/1} , is the name of a sampler object. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsSampler.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsSampler.xhtml">external</a> documentation.
 -spec isSampler(Sampler) -> 0|1 when Sampler :: integer().
 isSampler(Sampler) ->
   call(5712, <<Sampler:?GLuint>>).
@@ -14639,12 +6913,7 @@ isSampler(Sampler) ->
 %% .  `Unit'  must be less than the value of `?GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS'.
 %% 
 %%
-%%  When a sampler object is bound to a texture unit, its state supersedes that of the texture
-%% object bound to that texture unit. If the sampler name zero is bound to a texture unit,
-%% the currently bound texture's sampler state becomes active. A single sampler object may
-%% be bound to multiple texture units simultaneously. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindSampler.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindSampler.xhtml">external</a> documentation.
 -spec bindSampler(Unit, Sampler) -> 'ok' when Unit :: integer(),Sampler :: integer().
 bindSampler(Unit,Sampler) ->
   cast(5713, <<Unit:?GLuint,Sampler:?GLuint>>).
@@ -14656,141 +6925,7 @@ bindSampler(Unit,Sampler) ->
 %% modified, and must be the name of a sampler object previously returned from a call to  {@link gl:genSamplers/1} 
 %% . The following symbols are accepted in  `Pname' : 
 %%
-%% `?GL_TEXTURE_MIN_FILTER':  The texture minifying function is used whenever the pixel
-%% being textured maps to an area greater than one texture element. There are six defined
-%% minifying functions. Two of them use the nearest one or nearest four texture elements
-%% to compute the texture value. The other four use mipmaps. 
-%%
-%%  A mipmap is an ordered set of arrays representing the same image at progressively lower
-%% resolutions. If the texture has dimensions   2 n×2 m, there are  max(n m)+1 mipmaps. The first
-%% mipmap is the original texture, with dimensions   2 n×2 m. Each subsequent mipmap has
-%% dimensions   2(k-1)×2(l-1), where   2 k×2 l are the dimensions of the previous mipmap, until either
-%%   k=0 or   l=0. At that point, subsequent mipmaps have dimension   1×2(l-1) or   2(k-1)×1 until
-%% the final mipmap, which has dimension   1×1. To define the mipmaps, call  {@link gl:texImage1D/8} 
-%% ,  {@link gl:texImage2D/9} ,  {@link gl:texImage3D/10} ,  {@link gl:copyTexImage1D/7} , or  {@link gl:copyTexImage2D/8} 
-%%  with the `level' argument indicating the order of the mipmaps. Level 0 is the original
-%% texture; level   max(n m) is the final   1×1 mipmap. 
-%%
-%%  `Params'  supplies a function for minifying the texture as one of the following: 
-%%
-%% `?GL_NEAREST':  Returns the value of the texture element that is nearest (in Manhattan
-%% distance) to the center of the pixel being textured. 
-%%
-%% `?GL_LINEAR':  Returns the weighted average of the four texture elements that are
-%% closest to the center of the pixel being textured. These can include border texture elements,
-%% depending on the values of `?GL_TEXTURE_WRAP_S' and `?GL_TEXTURE_WRAP_T', and
-%% on the exact mapping. 
-%%
-%% `?GL_NEAREST_MIPMAP_NEAREST':  Chooses the mipmap that most closely matches the size
-%% of the pixel being textured and uses the `?GL_NEAREST' criterion (the texture element
-%% nearest to the center of the pixel) to produce a texture value. 
-%%
-%% `?GL_LINEAR_MIPMAP_NEAREST':  Chooses the mipmap that most closely matches the size
-%% of the pixel being textured and uses the `?GL_LINEAR' criterion (a weighted average
-%% of the four texture elements that are closest to the center of the pixel) to produce a
-%% texture value. 
-%%
-%% `?GL_NEAREST_MIPMAP_LINEAR':  Chooses the two mipmaps that most closely match the
-%% size of the pixel being textured and uses the `?GL_NEAREST' criterion (the texture
-%% element nearest to the center of the pixel) to produce a texture value from each mipmap.
-%% The final texture value is a weighted average of those two values. 
-%%
-%% `?GL_LINEAR_MIPMAP_LINEAR':  Chooses the two mipmaps that most closely match the
-%% size of the pixel being textured and uses the `?GL_LINEAR' criterion (a weighted
-%% average of the four texture elements that are closest to the center of the pixel) to produce
-%% a texture value from each mipmap. The final texture value is a weighted average of those
-%% two values. 
-%%
-%%  As more texture elements are sampled in the minification process, fewer aliasing artifacts
-%% will be apparent. While the `?GL_NEAREST' and `?GL_LINEAR' minification functions
-%% can be faster than the other four, they sample only one or four texture elements to determine
-%% the texture value of the pixel being rendered and can produce moire patterns or ragged
-%% transitions. The initial value of `?GL_TEXTURE_MIN_FILTER' is `?GL_NEAREST_MIPMAP_LINEAR'
-%% . 
-%%
-%% `?GL_TEXTURE_MAG_FILTER':  The texture magnification function is used when the pixel
-%% being textured maps to an area less than or equal to one texture element. It sets the
-%% texture magnification function to either `?GL_NEAREST' or `?GL_LINEAR' (see
-%% below). `?GL_NEAREST' is generally faster than `?GL_LINEAR', but it can produce
-%% textured images with sharper edges because the transition between texture elements is
-%% not as smooth. The initial value of `?GL_TEXTURE_MAG_FILTER' is `?GL_LINEAR'. 
-%%
-%% `?GL_NEAREST':  Returns the value of the texture element that is nearest (in Manhattan
-%% distance) to the center of the pixel being textured. 
-%%
-%% `?GL_LINEAR':  Returns the weighted average of the four texture elements that are
-%% closest to the center of the pixel being textured. These can include border texture elements,
-%% depending on the values of `?GL_TEXTURE_WRAP_S' and `?GL_TEXTURE_WRAP_T', and
-%% on the exact mapping. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_MIN_LOD':  Sets the minimum level-of-detail parameter. This floating-point
-%% value limits the selection of highest resolution mipmap (lowest mipmap level). The initial
-%% value is -1000. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_MAX_LOD':  Sets the maximum level-of-detail parameter. This floating-point
-%% value limits the selection of the lowest resolution mipmap (highest mipmap level). The
-%% initial value is 1000. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_WRAP_S':  Sets the wrap parameter for texture coordinate   s to either `?GL_CLAMP_TO_EDGE'
-%% , `?GL_MIRRORED_REPEAT', or `?GL_REPEAT'. `?GL_CLAMP_TO_BORDER' causes
-%% the   s coordinate to be clamped to the range [(-1 2/N) 1+(1 2/N)], where   N is the size of the texture in
-%% the direction of clamping.`?GL_CLAMP_TO_EDGE' causes   s coordinates to be clamped
-%% to the range  [(1 2/N) 1-(1 2/N)], where   N is the size of the texture in the direction of clamping. `?GL_REPEAT'
-%%  causes the integer part of the   s coordinate to be ignored; the GL uses only the fractional
-%% part, thereby creating a repeating pattern. `?GL_MIRRORED_REPEAT' causes the   s
-%% coordinate to be set to the fractional part of the texture coordinate if the integer part
-%% of   s is even; if the integer part of   s is odd, then the   s texture coordinate is
-%% set to   1-frac(s), where   frac(s) represents the fractional part of  s. Initially, `?GL_TEXTURE_WRAP_S'
-%%  is set to `?GL_REPEAT'. 
-%%
-%% 
-%%
-%% `?GL_TEXTURE_WRAP_T':  Sets the wrap parameter for texture coordinate   t to either `?GL_CLAMP_TO_EDGE'
-%% , `?GL_MIRRORED_REPEAT', or `?GL_REPEAT'. See the discussion under `?GL_TEXTURE_WRAP_S'
-%% . Initially, `?GL_TEXTURE_WRAP_T' is set to `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_WRAP_R':  Sets the wrap parameter for texture coordinate   r to either `?GL_CLAMP_TO_EDGE'
-%% , `?GL_MIRRORED_REPEAT', or `?GL_REPEAT'. See the discussion under `?GL_TEXTURE_WRAP_S'
-%% . Initially, `?GL_TEXTURE_WRAP_R' is set to `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_BORDER_COLOR':  The data in  `Params'  specifies four values that
-%% define the border values that should be used for border texels. If a texel is sampled
-%% from the border of the texture, the values of `?GL_TEXTURE_BORDER_COLOR' are interpreted
-%% as an RGBA color to match the texture's internal format and substituted for the non-existent
-%% texel data. If the texture contains depth components, the first component of `?GL_TEXTURE_BORDER_COLOR'
-%%  is interpreted as a depth value. The initial value is (0.0,  0.0,  0.0,  0.0). 
-%%
-%% `?GL_TEXTURE_COMPARE_MODE':  Specifies the texture comparison mode for currently
-%% bound textures. That is, a texture whose internal format is `?GL_DEPTH_COMPONENT_*';
-%% see  {@link gl:texImage2D/9} ) Permissible values are: 
-%%
-%% `?GL_COMPARE_REF_TO_TEXTURE':  Specifies that the interpolated and clamped   r texture
-%% coordinate should be compared to the value in the currently bound texture. See the discussion
-%% of `?GL_TEXTURE_COMPARE_FUNC' for details of how the comparison is evaluated. The
-%% result of the comparison is assigned to the red channel. 
-%%
-%% `?GL_NONE':  Specifies that the red channel should be assigned the appropriate value
-%% from the currently bound texture. 
-%%
-%% `?GL_TEXTURE_COMPARE_FUNC':  Specifies the comparison operator used when `?GL_TEXTURE_COMPARE_MODE'
-%%  is set to `?GL_COMPARE_REF_TO_TEXTURE'. Permissible values are: <table><tbody><tr><td>
-%% ` Texture Comparison Function '</td><td>` Computed result  '</td></tr></tbody><tbody>
-%% <tr><td>`?GL_LEQUAL'</td><td> result={1.0 0.0    r&lt;=(D t) r&gt;(D t))</td></tr><tr><td>`?GL_GEQUAL'</td><td>
-%% result={1.0 0.0    r&gt;=(D t) r&lt;(D t))</td></tr><tr><td>`?GL_LESS'</td><td> result={1.0 0.0    r&lt;(D t) r&gt;=(D t))</td></tr><tr><td>`?GL_GREATER'
-%% </td><td> result={1.0 0.0    r&gt;(D t) r&lt;=(D t))</td></tr><tr><td>`?GL_EQUAL'</td><td> result={1.0 0.0    r=(D t) r&amp;ne;
-%% (D t))</td></tr><tr><td>`?GL_NOTEQUAL'
-%% </td><td> result={1.0 0.0    r&amp;ne;(D t) r=(D t))</td></tr><tr><td>`?GL_ALWAYS'</td><td> result=1.0</td></tr><tr><td>
-%% `?GL_NEVER'</td><td> result=0.0</td></tr></tbody></table> where  r is the current
-%% interpolated texture coordinate, and   D t is the texture value sampled from the currently
-%% bound texture.  result is assigned to  R t. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSamplerParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glSamplerParameter.xhtml">external</a> documentation.
 -spec samplerParameteri(Sampler, Pname, Param) -> 'ok' when Sampler :: integer(),Pname :: enum(),Param :: integer().
 samplerParameteri(Sampler,Pname,Param) ->
   cast(5714, <<Sampler:?GLuint,Pname:?GLenum,Param:?GLint>>).
@@ -14827,7 +6962,7 @@ samplerParameterIiv(Sampler,Pname,Param) ->
 
 %% @doc glSamplerParameterI
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glSamplerParameterI.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec samplerParameterIuiv(Sampler, Pname, Param) -> 'ok' when Sampler :: integer(),Pname :: enum(),Param :: [integer()].
 samplerParameterIuiv(Sampler,Pname,Param) ->
   ParamLen = length(Param),
@@ -14842,41 +6977,7 @@ samplerParameterIuiv(Sampler,Pname,Param) ->
 %% .  `Pname'  accepts the same symbols as  {@link gl:samplerParameteri/3} , with the same
 %% interpretations: 
 %%
-%% `?GL_TEXTURE_MAG_FILTER':  Returns the single-valued texture magnification filter,
-%% a symbolic constant. The initial value is `?GL_LINEAR'. 
-%%
-%% `?GL_TEXTURE_MIN_FILTER':  Returns the single-valued texture minification filter,
-%% a symbolic constant. The initial value is `?GL_NEAREST_MIPMAP_LINEAR'. 
-%%
-%% `?GL_TEXTURE_MIN_LOD':  Returns the single-valued texture minimum level-of-detail
-%% value. The initial value is   -1000. 
-%%
-%% `?GL_TEXTURE_MAX_LOD':  Returns the single-valued texture maximum level-of-detail
-%% value. The initial value is 1000. 
-%%
-%% `?GL_TEXTURE_WRAP_S':  Returns the single-valued wrapping function for texture coordinate
-%%   s, a symbolic constant. The initial value is `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_WRAP_T':  Returns the single-valued wrapping function for texture coordinate
-%%   t, a symbolic constant. The initial value is `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_WRAP_R':  Returns the single-valued wrapping function for texture coordinate
-%%   r, a symbolic constant. The initial value is `?GL_REPEAT'. 
-%%
-%% `?GL_TEXTURE_BORDER_COLOR':  Returns four integer or floating-point numbers that
-%% comprise the RGBA color of the texture border. Floating-point values are returned in the
-%% range  [0 1]. Integer values are returned as a linear mapping of the internal floating-point
-%% representation such that 1.0 maps to the most positive representable integer and   -1.0
-%% maps to the most negative representable integer. The initial value is (0, 0, 0, 0). 
-%%
-%% `?GL_TEXTURE_COMPARE_MODE':  Returns a single-valued texture comparison mode, a symbolic
-%% constant. The initial value is `?GL_NONE'. See  {@link gl:samplerParameteri/3} . 
-%%
-%% `?GL_TEXTURE_COMPARE_FUNC':  Returns a single-valued texture comparison function,
-%% a symbolic constant. The initial value is `?GL_LEQUAL'. See  {@link gl:samplerParameteri/3} 
-%% . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetSamplerParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetSamplerParameter.xhtml">external</a> documentation.
 -spec getSamplerParameteriv(Sampler, Pname) -> [integer()] when Sampler :: integer(),Pname :: enum().
 getSamplerParameteriv(Sampler,Pname) ->
   call(5720, <<Sampler:?GLuint,Pname:?GLenum>>).
@@ -14895,7 +6996,7 @@ getSamplerParameterfv(Sampler,Pname) ->
 
 %% @doc glGetSamplerParameterI
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetSamplerParameterI.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getSamplerParameterIuiv(Sampler, Pname) -> [integer()] when Sampler :: integer(),Pname :: enum().
 getSamplerParameterIuiv(Sampler,Pname) ->
   call(5723, <<Sampler:?GLuint,Pname:?GLenum>>).
@@ -14910,21 +7011,21 @@ getSamplerParameterIuiv(Sampler,Pname) ->
 %%  block where the target is `?GL_TIME_ELAPSED' and it does not affect the result of
 %% that query object. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glQueryCounter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glQueryCounter.xhtml">external</a> documentation.
 -spec queryCounter(Id, Target) -> 'ok' when Id :: integer(),Target :: enum().
 queryCounter(Id,Target) ->
   cast(5724, <<Id:?GLuint,Target:?GLenum>>).
 
 %% @doc glGetQueryObjecti64v
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetQueryObjecti64v.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getQueryObjecti64v(Id, Pname) -> integer() when Id :: integer(),Pname :: enum().
 getQueryObjecti64v(Id,Pname) ->
   call(5725, <<Id:?GLuint,Pname:?GLenum>>).
 
 %% @doc glGetQueryObjectui64v
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetQueryObjectui64v.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getQueryObjectui64v(Id, Pname) -> integer() when Id :: integer(),Pname :: enum().
 getQueryObjectui64v(Id,Pname) ->
   call(5726, <<Id:?GLuint,Pname:?GLenum>>).
@@ -14936,25 +7037,7 @@ getQueryObjectui64v(Id,Pname) ->
 %% , execept that the parameters to  {@link gl:drawArraysInstancedBaseInstance/5}  are stored
 %% in memory at the address given by  `Indirect' . 
 %%
-%%  The parameters addressed by  `Indirect'  are packed into a structure that takes the
-%% form (in C):  typedef struct { uint count; uint primCount; uint first; uint baseInstance;
-%% } DrawArraysIndirectCommand;  const DrawArraysIndirectCommand *cmd = (const DrawArraysIndirectCommand
-%% *)indirect; glDrawArraysInstancedBaseInstance(mode, cmd-&gt;first, cmd-&gt;count, cmd-&gt;primCount,
-%% cmd-&gt;baseInstance);
-%%
-%%  If a buffer is bound to the `?GL_DRAW_INDIRECT_BUFFER' binding at the time of a
-%% call to ``gl:drawArraysIndirect'',  `Indirect'  is interpreted as an offset, in basic
-%% machine units, into that buffer and the parameter data is read from the buffer rather
-%% than from client memory. 
-%%
-%%  In contrast to  {@link gl:drawArraysInstancedBaseInstance/5} , the first member of the parameter
-%% structure is unsigned, and out-of-range indices do not generate an error. 
-%%
-%%  Vertex attributes that are modified by ``gl:drawArraysIndirect'' have an unspecified
-%% value after ``gl:drawArraysIndirect'' returns. Attributes that aren't modified remain
-%% well defined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawArraysIndirect.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawArraysIndirect.xhtml">external</a> documentation.
 -spec drawArraysIndirect(Mode, Indirect) -> 'ok' when Mode :: enum(),Indirect :: offset()|mem().
 drawArraysIndirect(Mode,Indirect) when  is_integer(Indirect) ->
   cast(5727, <<Mode:?GLenum,Indirect:?GLuint>>);
@@ -14969,32 +7052,7 @@ drawArraysIndirect(Mode,Indirect) ->
 %% , execpt that the parameters to  {@link gl:drawElementsInstancedBaseVertexBaseInstance/7} 
 %% are stored in memory at the address given by  `Indirect' . 
 %%
-%%  The parameters addressed by  `Indirect'  are packed into a structure that takes the
-%% form (in C):  typedef struct { uint count; uint primCount; uint firstIndex; uint baseVertex;
-%% uint baseInstance; } DrawElementsIndirectCommand;
-%%
-%% ``gl:drawElementsIndirect'' is equivalent to:  void glDrawElementsIndirect(GLenum mode,
-%% GLenum type, const void * indirect) { const DrawElementsIndirectCommand *cmd = (const
-%% DrawElementsIndirectCommand *)indirect; glDrawElementsInstancedBaseVertexBaseInstance(mode,
-%% cmd-&gt;count, type, cmd-&gt;firstIndex + size-of-type, cmd-&gt;primCount, cmd-&gt;baseVertex,
-%% cmd-&gt;baseInstance); }
-%%
-%%  If a buffer is bound to the `?GL_DRAW_INDIRECT_BUFFER' binding at the time of a
-%% call to ``gl:drawElementsIndirect'',  `Indirect'  is interpreted as an offset, in
-%% basic machine units, into that buffer and the parameter data is read from the buffer rather
-%% than from client memory. 
-%%
-%%  Note that indices stored in client memory are not supported. If no buffer is bound to
-%% the `?GL_ELEMENT_ARRAY_BUFFER' binding, an error will be generated. 
-%%
-%%  The results of the operation are undefined if the reservedMustBeZero member of the parameter
-%% structure is non-zero. However, no error is generated in this case. 
-%%
-%%  Vertex attributes that are modified by ``gl:drawElementsIndirect'' have an unspecified
-%% value after ``gl:drawElementsIndirect'' returns. Attributes that aren't modified remain
-%% well defined. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElementsIndirect.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawElementsIndirect.xhtml">external</a> documentation.
 -spec drawElementsIndirect(Mode, Type, Indirect) -> 'ok' when Mode :: enum(),Type :: enum(),Indirect :: offset()|mem().
 drawElementsIndirect(Mode,Type,Indirect) when  is_integer(Indirect) ->
   cast(5729, <<Mode:?GLenum,Type:?GLenum,Indirect:?GLuint>>);
@@ -15142,15 +7200,7 @@ getUniformdv(Program,Location) ->
 %%  `Name'  in the shader stage of type  `Shadertype'  attached to  `Program' ,
 %% with behavior otherwise identical to  {@link gl:getUniformLocation/2} . 
 %%
-%%  If  `Name'  is not the name of a subroutine uniform in the shader stage, -1 is returned,
-%% but no error is generated. If  `Name'  is the name of a subroutine uniform in the shader
-%% stage, a value between zero and the value of `?GL_ACTIVE_SUBROUTINE_LOCATIONS' minus
-%% one will be returned. Subroutine locations are assigned using consecutive integers in
-%% the range from zero to the value of `?GL_ACTIVE_SUBROUTINE_LOCATIONS' minus one for
-%% the shader stage. For active subroutine uniforms declared as arrays, the declared array
-%% elements are assigned consecutive locations. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetSubroutineUniformLocation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetSubroutineUniformLocation.xhtml">external</a> documentation.
 -spec getSubroutineUniformLocation(Program, Shadertype, Name) -> integer() when Program :: integer(),Shadertype :: enum(),Name :: string().
 getSubroutineUniformLocation(Program,Shadertype,Name) ->
   NameLen = length(Name),
@@ -15164,14 +7214,7 @@ getSubroutineUniformLocation(Program,Shadertype,Name) ->
 %% shader subroutine index.  `Name'  contains the null-terminated name of the subroutine
 %% uniform whose name to query. 
 %%
-%%  If  `Name'  is not the name of a subroutine uniform in the shader stage, `?GL_INVALID_INDEX'
-%%  is returned, but no error is generated. If  `Name'  is the name of a subroutine uniform
-%% in the shader stage, a value between zero and the value of `?GL_ACTIVE_SUBROUTINES'
-%% minus one will be returned. Subroutine indices are assigned using consecutive integers
-%% in the range from zero to the value of `?GL_ACTIVE_SUBROUTINES' minus one for the
-%% shader stage. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetSubroutineIndex.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetSubroutineIndex.xhtml">external</a> documentation.
 -spec getSubroutineIndex(Program, Shadertype, Name) -> integer() when Program :: integer(),Shadertype :: enum(),Name :: string().
 getSubroutineIndex(Program,Shadertype,Name) ->
   NameLen = length(Name),
@@ -15185,15 +7228,7 @@ getSubroutineIndex(Program,Shadertype,Name) ->
 %%  `Index'  must be between zero and the value of `?GL_ACTIVE_SUBROUTINE_UNIFORMS'
 %% minus one for the shader stage. 
 %%
-%%  The uniform name is returned as a null-terminated string in  `Name' . The actual number
-%% of characters written into  `Name' , excluding the null terminator is returned in  `Length' 
-%% . If  `Length'  is `?NULL', no length is returned. The maximum number of characters
-%% that may be written into  `Name' , including the null terminator, is specified by  `Bufsize' 
-%% . The length of the longest subroutine uniform name in  `Program'  and  `Shadertype' 
-%%  is given by the value of `?GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH', which can be
-%% queried with  {@link gl:getProgramStageiv/3} . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveSubroutineUniformName.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveSubroutineUniformName.xhtml">external</a> documentation.
 -spec getActiveSubroutineUniformName(Program, Shadertype, Index, Bufsize) -> string() when Program :: integer(),Shadertype :: enum(),Index :: integer(),Bufsize :: integer().
 getActiveSubroutineUniformName(Program,Shadertype,Index,Bufsize) ->
   call(5751, <<Program:?GLuint,Shadertype:?GLenum,Index:?GLuint,Bufsize:?GLsizei>>).
@@ -15205,13 +7240,7 @@ getActiveSubroutineUniformName(Program,Shadertype,Index,Bufsize) ->
 %% shader subroutine uniform within the shader stage given by  `Stage' , and must between
 %% zero and the value of `?GL_ACTIVE_SUBROUTINES' minus one for the shader stage. 
 %%
-%%  The name of the selected subroutine is returned as a null-terminated string in  `Name' 
-%% . The actual number of characters written into  `Name' , not including the null-terminator,
-%% is is returned in  `Length' . If  `Length'  is `?NULL', no length is returned.
-%% The maximum number of characters that may be written into  `Name' , including the null-terminator,
-%% is given in  `Bufsize' . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetActiveSubroutineName.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetActiveSubroutineName.xhtml">external</a> documentation.
 -spec getActiveSubroutineName(Program, Shadertype, Index, Bufsize) -> string() when Program :: integer(),Shadertype :: enum(),Index :: integer(),Bufsize :: integer().
 getActiveSubroutineName(Program,Shadertype,Index,Bufsize) ->
   call(5752, <<Program:?GLuint,Shadertype:?GLenum,Index:?GLuint,Bufsize:?GLsizei>>).
@@ -15225,7 +7254,7 @@ getActiveSubroutineName(Program,Shadertype,Index,Bufsize) ->
 %% values in  `Indices'  must be less than the value of `?GL_ACTIVE_SUBROUTINES'
 %% for the shader stage. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glUniformSubroutines.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glUniformSubroutines.xhtml">external</a> documentation.
 -spec uniformSubroutinesuiv(Shadertype, Indices) -> 'ok' when Shadertype :: enum(),Indices :: [integer()].
 uniformSubroutinesuiv(Shadertype,Indices) ->
   IndicesLen = length(Indices),
@@ -15240,7 +7269,7 @@ uniformSubroutinesuiv(Shadertype,Indices) ->
 %% in use at shader stage  `Shadertype' . The value of the subroutine uniform is returned
 %% in  `Values' . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformSubroutine.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetUniformSubroutine.xhtml">external</a> documentation.
 -spec getUniformSubroutineuiv(Shadertype, Location) -> {integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer(),integer()} when Shadertype :: enum(),Location :: integer().
 getUniformSubroutineuiv(Shadertype,Location) ->
   call(5754, <<Shadertype:?GLenum,Location:?GLint>>).
@@ -15253,26 +7282,7 @@ getUniformSubroutineuiv(Shadertype,Location) ->
 %% should be queried. The value or values of the parameter to be queried is returned in the
 %% variable whose address is given in  `Values' . 
 %%
-%%  If  `Pname'  is `?GL_ACTIVE_SUBROUTINE_UNIFORMS', the number of active subroutine
-%% variables in the stage is returned in  `Values' . 
-%%
-%%  If  `Pname'  is `?GL_ACTIVE_SUBROUTINE_UNIFORM_LOCATIONS', the number of active
-%% subroutine variable locations in the stage is returned in  `Values' . 
-%%
-%%  If  `Pname'  is `?GL_ACTIVE_SUBROUTINES', the number of active subroutines in
-%% the stage is returned in  `Values' . 
-%%
-%%  If  `Pname'  is `?GL_ACTIVE_SUBROUTINE_UNIFORM_MAX_LENGTH', the length of the
-%% longest subroutine uniform for the stage is returned in  `Values' . 
-%%
-%%  If  `Pname'  is `?GL_ACTIVE_SUBROUTINE_MAX_LENGTH', the length of the longest
-%% subroutine name for the stage is returned in  `Values' . The returned name length includes
-%% space for the null-terminator. 
-%%
-%%  If there is no shader present of type  `Shadertype' , the returned value will be consistent
-%% with a shader containing no subroutines or subroutine uniforms. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramStage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetProgramStage.xhtml">external</a> documentation.
 -spec getProgramStageiv(Program, Shadertype, Pname) -> integer() when Program :: integer(),Shadertype :: enum(),Pname :: enum().
 getProgramStageiv(Program,Shadertype,Pname) ->
   call(5755, <<Program:?GLuint,Shadertype:?GLenum,Pname:?GLenum>>).
@@ -15286,20 +7296,7 @@ getProgramStageiv(Program,Shadertype,Pname) ->
 %%  `Values'  specifies the address of an array containing the new values for the parameter
 %% specified by  `Pname' . 
 %%
-%%  When  `Pname'  is `?GL_PATCH_VERTICES',  `Value'  specifies the number of
-%% vertices that will be used to make up a single patch primitive. Patch primitives are consumed
-%% by the tessellation control shader (if present) and subsequently used for tessellation.
-%% When primitives are specified using  {@link gl:drawArrays/3}  or a similar function, each
-%% patch will be made from  `Parameter'  control points, each represented by a vertex
-%% taken from the enabeld vertex arrays.  `Parameter'  must be greater than zero, and
-%% less than or equal to the value of `?GL_MAX_PATCH_VERTICES'. 
-%%
-%%  When  `Pname'  is `?GL_PATCH_DEFAULT_OUTER_LEVEL' or `?GL_PATCH_DEFAULT_INNER_LEVEL'
-%% ,  `Values'  contains the address of an array contiaining the default outer or inner
-%% tessellation levels, respectively, to be used when no tessellation control shader is present.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPatchParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPatchParameter.xhtml">external</a> documentation.
 -spec patchParameteri(Pname, Value) -> 'ok' when Pname :: enum(),Value :: integer().
 patchParameteri(Pname,Value) ->
   cast(5756, <<Pname:?GLenum,Value:?GLint>>).
@@ -15319,18 +7316,7 @@ patchParameterfv(Pname,Values) ->
 %% . If  `Id'  has not previously been bound, a new transform feedback object with name  `Id' 
 %%  and initialized with with the default transform state vector is created. 
 %%
-%%  In the initial state, a default transform feedback object is bound and treated as a transform
-%% feedback object with a name of zero. If the name zero is subsequently bound, the default
-%% transform feedback object is again bound to the GL state. 
-%%
-%%  While a transform feedback buffer object is bound, GL operations on the target to which
-%% it is bound affect the bound transform feedback object, and queries of the target to which
-%% a transform feedback object is bound return state from the bound object. When buffer objects
-%% are bound for transform feedback, they are attached to the currently bound transform feedback
-%% object. Buffer objects are used for trans- form feedback only if they are attached to
-%% the currently bound transform feedback object. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindTransformFeedback.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindTransformFeedback.xhtml">external</a> documentation.
 -spec bindTransformFeedback(Target, Id) -> 'ok' when Target :: enum(),Id :: integer().
 bindTransformFeedback(Target,Id) ->
   cast(5758, <<Target:?GLenum,Id:?GLuint>>).
@@ -15343,7 +7329,7 @@ bindTransformFeedback(Target,Id) ->
 %% and it has no contents. If an active transform feedback object is deleted, its name immediately
 %% becomes unused, but the underlying object is not deleted until it is no longer active. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteTransformFeedbacks.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteTransformFeedbacks.xhtml">external</a> documentation.
 -spec deleteTransformFeedbacks(Ids) -> 'ok' when Ids :: [integer()].
 deleteTransformFeedbacks(Ids) ->
   IdsLen = length(Ids),
@@ -15356,7 +7342,7 @@ deleteTransformFeedbacks(Ids) ->
 %% names in  `Ids' . These names are marked as used, for the purposes of ``gl:genTransformFeedbacks''
 %%  only, but they acquire transform feedback state only when they are first bound. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenTransformFeedbacks.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenTransformFeedbacks.xhtml">external</a> documentation.
 -spec genTransformFeedbacks(N) -> [integer()] when N :: integer().
 genTransformFeedbacks(N) ->
   call(5760, <<N:?GLsizei>>).
@@ -15371,7 +7357,7 @@ genTransformFeedbacks(N) ->
 %% the name is not a transform feedback object and ``gl:isTransformFeedback'' returns `?GL_FALSE'
 %% . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsTransformFeedback.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsTransformFeedback.xhtml">external</a> documentation.
 -spec isTransformFeedback(Id) -> 0|1 when Id :: integer().
 isTransformFeedback(Id) ->
   call(5761, <<Id:?GLuint>>).
@@ -15384,7 +7370,7 @@ isTransformFeedback(Id) ->
 %% to the object results in an error. However, a new transform feedback object may be bound
 %% while transform feedback is paused. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glPauseTransformFeedback.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glPauseTransformFeedback.xhtml">external</a> documentation.
 -spec pauseTransformFeedback() -> 'ok'.
 pauseTransformFeedback() ->
   cast(5762, <<>>).
@@ -15397,7 +7383,7 @@ pauseTransformFeedback() ->
 %% to the object results in an error. However, a new transform feedback object may be bound
 %% while transform feedback is paused. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glResumeTransformFeedback.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glResumeTransformFeedback.xhtml">external</a> documentation.
 -spec resumeTransformFeedback() -> 'ok'.
 resumeTransformFeedback() ->
   cast(5763, <<>>).
@@ -15411,7 +7397,7 @@ resumeTransformFeedback() ->
 %% zero the last time transform feedback was active on the transform feedback object named
 %% by  `Id' . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawTransformFeedback.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawTransformFeedback.xhtml">external</a> documentation.
 -spec drawTransformFeedback(Mode, Id) -> 'ok' when Mode :: enum(),Id :: integer().
 drawTransformFeedback(Mode,Id) ->
   cast(5764, <<Mode:?GLenum,Id:?GLuint>>).
@@ -15426,17 +7412,14 @@ drawTransformFeedback(Mode,Id) ->
 %%  the last time transform feedback was active on the transform feedback object named by  `Id' 
 %% . 
 %%
-%%  Calling  {@link gl:drawTransformFeedback/2}  is equivalent to calling ``gl:drawTransformFeedbackStream''
-%%  with  `Stream'  set to zero. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawTransformFeedbackStream.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawTransformFeedbackStream.xhtml">external</a> documentation.
 -spec drawTransformFeedbackStream(Mode, Id, Stream) -> 'ok' when Mode :: enum(),Id :: integer(),Stream :: integer().
 drawTransformFeedbackStream(Mode,Id,Stream) ->
   cast(5765, <<Mode:?GLenum,Id:?GLuint,Stream:?GLuint>>).
 
 %% @doc glBeginQueryIndexe
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBeginQueryIndexe.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec beginQueryIndexed(Target, Index, Id) -> 'ok' when Target :: enum(),Index :: integer(),Id :: integer().
 beginQueryIndexed(Target,Index,Id) ->
   cast(5766, <<Target:?GLenum,Index:?GLuint,Id:?GLuint>>).
@@ -15450,70 +7433,7 @@ beginQueryIndexed(Target,Index,Id) ->
 %% , `?GL_PRIMITIVES_GENERATED', `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN', or `?GL_TIME_ELAPSED'
 %% . The behavior of the query object depends on its type and is as follows. 
 %%
-%%  `Index'  specifies the index of the query target and must be between a  `Target' -specific
-%% maximum. 
-%%
-%%  If  `Target'  is `?GL_SAMPLES_PASSED',  `Id'  must be an unused name, or the
-%% name of an existing occlusion query object. When ``gl:beginQueryIndexed'' is executed,
-%% the query object's samples-passed counter is reset to 0. Subsequent rendering will increment
-%% the counter for every sample that passes the depth test. If the value of `?GL_SAMPLE_BUFFERS'
-%%  is 0, then the samples-passed count is incremented by 1 for each fragment. If the value
-%% of `?GL_SAMPLE_BUFFERS' is 1, then the samples-passed count is incremented by the
-%% number of samples whose coverage bit is set. However, implementations, at their discression
-%% may instead increase the samples-passed count by the value of `?GL_SAMPLES' if any
-%% sample in the fragment is covered. When ``gl:endQueryIndexed'' is executed, the samples-passed
-%% counter is assigned to the query object's result value. This value can be queried by calling
-%%  {@link gl:getQueryObjectiv/2}  with  `Pname' `?GL_QUERY_RESULT'. When  `Target' 
-%% is `?GL_SAMPLES_PASSED',  `Index'  must be zero. 
-%%
-%%  If  `Target'  is `?GL_ANY_SAMPLES_PASSED',  `Id'  must be an unused name,
-%% or the name of an existing boolean occlusion query object. When ``gl:beginQueryIndexed''
-%% is executed, the query object's samples-passed flag is reset to `?GL_FALSE'. Subsequent
-%% rendering causes the flag to be set to `?GL_TRUE' if any sample passes the depth
-%% test. When ``gl:endQueryIndexed'' is executed, the samples-passed flag is assigned to
-%% the query object's result value. This value can be queried by calling  {@link gl:getQueryObjectiv/2} 
-%%  with  `Pname' `?GL_QUERY_RESULT'. When  `Target'  is `?GL_ANY_SAMPLES_PASSED'
-%% ,  `Index'  must be zero. 
-%%
-%%  If  `Target'  is `?GL_PRIMITIVES_GENERATED',  `Id'  must be an unused name,
-%% or the name of an existing primitive query object previously bound to the `?GL_PRIMITIVES_GENERATED'
-%%  query binding. When ``gl:beginQueryIndexed'' is executed, the query object's primitives-generated
-%% counter is reset to 0. Subsequent rendering will increment the counter once for every
-%% vertex that is emitted from the geometry shader to the stream given by  `Index' , or
-%% from the vertex shader if  `Index'  is zero and no geometry shader is present. When ``gl:endQueryIndexed''
-%%  is executed, the primitives-generated counter for stream  `Index'  is assigned to
-%% the query object's result value. This value can be queried by calling  {@link gl:getQueryObjectiv/2} 
-%%  with  `Pname' `?GL_QUERY_RESULT'. When  `Target'  is `?GL_PRIMITIVES_GENERATED'
-%% ,  `Index'  must be less than the value of `?GL_MAX_VERTEX_STREAMS'. 
-%%
-%%  If  `Target'  is `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN',  `Id'  must
-%% be an unused name, or the name of an existing primitive query object previously bound
-%% to the `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN' query binding. When ``gl:beginQueryIndexed''
-%%  is executed, the query object's primitives-written counter for the stream specified by  `Index' 
-%%  is reset to 0. Subsequent rendering will increment the counter once for every vertex
-%% that is written into the bound transform feedback buffer(s) for stream  `Index' . If
-%% transform feedback mode is not activated between the call to ``gl:beginQueryIndexed''
-%% and ``gl:endQueryIndexed'', the counter will not be incremented. When ``gl:endQueryIndexed''
-%%  is executed, the primitives-written counter for stream  `Index'  is assigned to the
-%% query object's result value. This value can be queried by calling  {@link gl:getQueryObjectiv/2} 
-%%  with  `Pname' `?GL_QUERY_RESULT'. When  `Target'  is `?GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN'
-%% ,  `Index'  must be less than the value of `?GL_MAX_VERTEX_STREAMS'. 
-%%
-%%  If  `Target'  is `?GL_TIME_ELAPSED',  `Id'  must be an unused name, or the
-%% name of an existing timer query object previously bound to the `?GL_TIME_ELAPSED'
-%% query binding. When ``gl:beginQueryIndexed'' is executed, the query object's time counter
-%% is reset to 0. When ``gl:endQueryIndexed'' is executed, the elapsed server time that
-%% has passed since the call to ``gl:beginQueryIndexed'' is written into the query object's
-%% time counter. This value can be queried by calling  {@link gl:getQueryObjectiv/2}  with  `Pname' 
-%% `?GL_QUERY_RESULT'. When  `Target'  is `?GL_TIME_ELAPSED',  `Index'  must
-%% be zero. 
-%%
-%%  Querying the `?GL_QUERY_RESULT' implicitly flushes the GL pipeline until the rendering
-%% delimited by the query object has completed and the result is available. `?GL_QUERY_RESULT_AVAILABLE'
-%%  can be queried to determine if the result is immediately available or if the rendering
-%% is not yet complete. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBeginQueryIndexed.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBeginQueryIndexed.xhtml">external</a> documentation.
 -spec endQueryIndexed(Target, Index) -> 'ok' when Target :: enum(),Index :: integer().
 endQueryIndexed(Target,Index) ->
   cast(5767, <<Target:?GLenum,Index:?GLuint>>).
@@ -15525,13 +7445,7 @@ endQueryIndexed(Target,Index) ->
 %% the index of the query object target and must be between zero and a target-specific maxiumum.
 %% 
 %%
-%%  `Pname'  names a specific query object target parameter. When  `Pname'  is `?GL_CURRENT_QUERY'
-%% , the name of the currently active query for the specified  `Index'  of  `Target' ,
-%% or zero if no query is active, will be placed in  `Params' . If  `Pname'  is `?GL_QUERY_COUNTER_BITS'
-%% , the implementation-dependent number of bits used to hold the result of queries for  `Target' 
-%%  is returned in  `Params' . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetQueryIndexed.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetQueryIndexed.xhtml">external</a> documentation.
 -spec getQueryIndexediv(Target, Index, Pname) -> integer() when Target :: enum(),Index :: integer(),Pname :: enum().
 getQueryIndexediv(Target,Index,Pname) ->
   call(5768, <<Target:?GLenum,Index:?GLuint,Pname:?GLenum>>).
@@ -15543,7 +7457,7 @@ getQueryIndexediv(Target,Index,Pname) ->
 %% subsequently be called and the implementation may at that time reallocate resources previously
 %% freed by the call to ``gl:releaseShaderCompiler''. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glReleaseShaderCompiler.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glReleaseShaderCompiler.xhtml">external</a> documentation.
 -spec releaseShaderCompiler() -> 'ok'.
 releaseShaderCompiler() ->
   cast(5769, <<>>).
@@ -15555,17 +7469,7 @@ releaseShaderCompiler() ->
 %% bytes of binary shader code stored in client memory.  `BinaryFormat'  specifies the
 %% format of the pre-compiled code. 
 %%
-%%  The binary image contained in  `Binary'  will be decoded according to the extension
-%% specification defining the specified  `BinaryFormat'  token. OpenGL does not define
-%% any specific binary formats, but it does provide a mechanism to obtain token vaues for
-%% such formats provided by such extensions. 
-%%
-%%  Depending on the types of the shader objects in  `Shaders' , ``gl:shaderBinary''
-%% will individually load binary vertex or fragment shaders, or load an executable binary
-%% that contains an optimized pair of vertex and fragment shaders stored in the same binary.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glShaderBinary.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glShaderBinary.xhtml">external</a> documentation.
 -spec shaderBinary(Shaders, Binaryformat, Binary) -> 'ok' when Shaders :: [integer()],Binaryformat :: enum(),Binary :: binary().
 shaderBinary(Shaders,Binaryformat,Binary) ->
   ShadersLen = length(Shaders),
@@ -15583,17 +7487,7 @@ shaderBinary(Shaders,Binaryformat,Binary) ->
 %% `?GL_HIGH_FLOAT', `?GL_LOW_INT', `?GL_MEDIUM_INT', or `?GL_HIGH_INT'.
 %% 
 %%
-%%  `Range'  points to an array of two integers into which the format's numeric range
-%% will be returned. If min and max are the smallest values representable in the format,
-%% then the values returned are defined to be:  `Range' [0] = floor(log2(|min|)) and  `Range' 
-%% [1] = floor(log2(|max|)). 
-%%
-%%  `Precision'  specifies the address of an integer into which will be written the log2
-%% value of the number of bits of precision of the format. If the smallest representable
-%% value greater than 1 is 1 + `eps', then the integer addressed by  `Precision' 
-%% will contain floor(-log2(eps)). 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetShaderPrecisionFormat.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetShaderPrecisionFormat.xhtml">external</a> documentation.
 -spec getShaderPrecisionFormat(Shadertype, Precisiontype) -> {Range :: {integer(),integer()},Precision :: integer()} when Shadertype :: enum(),Precisiontype :: enum().
 getShaderPrecisionFormat(Shadertype,Precisiontype) ->
   call(5771, <<Shadertype:?GLenum,Precisiontype:?GLenum>>).
@@ -15606,7 +7500,7 @@ depthRangef(N,F) ->
 
 %% @doc glClearDepthf
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glClearDepthf.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec clearDepthf(D) -> 'ok' when D :: clamp().
 clearDepthf(D) ->
   cast(5773, <<D:?GLclampf>>).
@@ -15621,13 +7515,7 @@ clearDepthf(D) ->
 %% in the variable whose address is given by  `Length' . If  `Length'  is `?NULL',
 %% then no length is returned. 
 %%
-%%  The format of the program binary written into  `Binary'  is returned in the variable
-%% whose address is given by  `BinaryFormat' , and may be implementation dependent. The
-%% binary produced by the GL may subsequently be returned to the GL by calling  {@link gl:programBinary/3} 
-%% , with  `BinaryFormat'  and  `Length'  set to the values returned by ``gl:getProgramBinary''
-%% , and passing the returned binary data in the  `Binary'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramBinary.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetProgramBinary.xhtml">external</a> documentation.
 -spec getProgramBinary(Program, BufSize) -> {BinaryFormat :: enum(),Binary :: binary()} when Program :: integer(),BufSize :: integer().
 getProgramBinary(Program,BufSize) ->
   call(5774, <<Program:?GLuint,BufSize:?GLsizei>>).
@@ -15642,19 +7530,7 @@ getProgramBinary(Program,BufSize) ->
 %% are not met, loading the program binary will fail and  `Program' 's `?GL_LINK_STATUS'
 %%  will be set to `?GL_FALSE'. 
 %%
-%%  A program object's program binary is replaced by calls to  {@link gl:linkProgram/1}  or ``gl:programBinary''
-%% . When linking success or failure is concerned, ``gl:programBinary'' can be considered
-%% to perform an implicit linking operation.  {@link gl:linkProgram/1}  and ``gl:programBinary''
-%%  both set the program object's `?GL_LINK_STATUS' to `?GL_TRUE' or `?GL_FALSE'
-%% . 
-%%
-%%  A successful call to ``gl:programBinary'' will reset all uniform variables to their
-%% initial values. The initial value is either the value of the variable's initializer as
-%% specified in the original shader source, or zero if no initializer was present. Additionally,
-%% all vertex shader input and fragment shader output assignments that were in effect when
-%% the program was linked before saving are restored with ``gl:programBinary'' is called. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramBinary.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glProgramBinary.xhtml">external</a> documentation.
 -spec programBinary(Program, BinaryFormat, Binary) -> 'ok' when Program :: integer(),BinaryFormat :: enum(),Binary :: binary().
 programBinary(Program,BinaryFormat,Binary) ->
   send_bin(Binary),
@@ -15665,22 +7541,7 @@ programBinary(Program,BinaryFormat,Binary) ->
 %% ``gl:programParameter'' specifies a new value for the parameter nameed by  `Pname' 
 %% for the program object  `Program' . 
 %%
-%%  If  `Pname'  is `?GL_PROGRAM_BINARY_RETRIEVABLE_HINT',  `Value'  should be `?GL_FALSE'
-%%  or `?GL_TRUE' to indicate to the implementation the intention of the application
-%% to retrieve the program's binary representation with  {@link gl:getProgramBinary/2} . The
-%% implementation may use this information to store information that may be useful for a
-%% future query of the program's binary. It is recommended to set `?GL_PROGRAM_BINARY_RETRIEVABLE_HINT'
-%%  for the program to `?GL_TRUE' before calling  {@link gl:linkProgram/1} , and using
-%% the program at run-time if the binary is to be retrieved later. 
-%%
-%%  If  `Pname'  is `?GL_PROGRAM_SEPARABLE',  `Value'  must be `?GL_TRUE'
-%% or `?GL_FALSE' and indicates whether  `Program'  can be bound to individual pipeline
-%% stages via  {@link gl:useProgramStages/3} . A program's `?GL_PROGRAM_SEPARABLE' parameter
-%% must be set to `?GL_TRUE'`before' {@link gl:linkProgram/1}  is called in order
-%% for it to be usable with a program pipeline object. The initial state of `?GL_PROGRAM_SEPARABLE'
-%%  is `?GL_FALSE'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramParameter.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glProgramParameter.xhtml">external</a> documentation.
 -spec programParameteri(Program, Pname, Value) -> 'ok' when Program :: integer(),Pname :: enum(),Value :: integer().
 programParameteri(Program,Pname,Value) ->
   cast(5776, <<Program:?GLuint,Pname:?GLenum,Value:?GLint>>).
@@ -15697,15 +7558,7 @@ programParameteri(Program,Pname,Value) ->
 %% special value `?GL_ALL_SHADER_BITS' may be specified to indicate that all executables
 %% contained in  `Program'  should be installed in  `Pipeline' . 
 %%
-%%  If  `Program'  refers to a program object with a valid shader attached for an indicated
-%% shader stage, ``gl:useProgramStages'' installs the executable code for that stage in
-%% the indicated program pipeline object  `Pipeline' . If  `Program'  is zero, or refers
-%% to a program object with no valid shader executable for a given stage, it is as if the
-%% pipeline object has no programmable stage configured for the indicated shader stages. If  `Stages' 
-%%  contains bits other than those listed above, and is not equal to `?GL_ALL_SHADER_BITS'
-%% , an error is generated. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glUseProgramStages.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glUseProgramStages.xhtml">external</a> documentation.
 -spec useProgramStages(Pipeline, Stages, Program) -> 'ok' when Pipeline :: integer(),Stages :: integer(),Program :: integer().
 useProgramStages(Pipeline,Stages,Program) ->
   cast(5777, <<Pipeline:?GLuint,Stages:?GLbitfield,Program:?GLuint>>).
@@ -15717,14 +7570,14 @@ useProgramStages(Pipeline,Stages,Program) ->
 %% the active program pipeline object is the target of calls to  {@link gl:uniform1f/2}  when
 %% no program has been made current through a call to  {@link gl:useProgram/1} . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glActiveShaderProgram.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glActiveShaderProgram.xhtml">external</a> documentation.
 -spec activeShaderProgram(Pipeline, Program) -> 'ok' when Pipeline :: integer(),Program :: integer().
 activeShaderProgram(Pipeline,Program) ->
   cast(5778, <<Pipeline:?GLuint,Program:?GLuint>>).
 
 %% @doc glCreateShaderProgramv
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glCreateShaderProgramv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec createShaderProgramv(Type, Strings) -> integer() when Type :: enum(),Strings :: iolist().
 createShaderProgramv(Type,Strings) ->
   StringsTemp = list_to_binary([[Str|[0]] || Str <- Strings ]),
@@ -15738,17 +7591,7 @@ createShaderProgramv(Type,Strings) ->
 %% no program pipeline exists with name  `Pipeline'  then a new pipeline object is created
 %% with that name and initialized to the default state vector. 
 %%
-%%  When a program pipeline object is bound using ``gl:bindProgramPipeline'', any previous
-%% binding is broken and is replaced with a binding to the specified pipeline object. If  `Pipeline' 
-%%  is zero, the previous binding is broken and is not replaced, leaving no pipeline object
-%% bound. If no current program object has been established by  {@link gl:useProgram/1} , the
-%% program objects used for each stage and for uniform updates are taken from the bound program
-%% pipeline object, if any. If there is a current program object established by  {@link gl:useProgram/1} 
-%% , the bound program pipeline object has no effect on rendering or uniform updates. When
-%% a bound program pipeline object is used for rendering, individual shader executables are
-%% taken from its program objects. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindProgramPipeline.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindProgramPipeline.xhtml">external</a> documentation.
 -spec bindProgramPipeline(Pipeline) -> 'ok' when Pipeline :: integer().
 bindProgramPipeline(Pipeline) ->
   cast(5780, <<Pipeline:?GLuint>>).
@@ -15762,7 +7605,7 @@ bindProgramPipeline(Pipeline) ->
 %% the binding for that object reverts to zero and no program pipeline object becomes current.
 %% 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDeleteProgramPipelines.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDeleteProgramPipelines.xhtml">external</a> documentation.
 -spec deleteProgramPipelines(Pipelines) -> 'ok' when Pipelines :: [integer()].
 deleteProgramPipelines(Pipelines) ->
   PipelinesLen = length(Pipelines),
@@ -15775,7 +7618,7 @@ deleteProgramPipelines(Pipelines) ->
 %% names in  `Pipelines' . These names are marked as used, for the purposes of ``gl:genProgramPipelines''
 %%  only, but they acquire program pipeline state only when they are first bound. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGenProgramPipelines.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGenProgramPipelines.xhtml">external</a> documentation.
 -spec genProgramPipelines(N) -> [integer()] when N :: integer().
 genProgramPipelines(N) ->
   call(5782, <<N:?GLsizei>>).
@@ -15790,7 +7633,7 @@ genProgramPipelines(N) ->
 %% the name is not a program pipeline object and ``gl:isProgramPipeline'' returns `?GL_FALSE'
 %% . 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glIsProgramPipeline.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsProgramPipeline.xhtml">external</a> documentation.
 -spec isProgramPipeline(Pipeline) -> 0|1 when Pipeline :: integer().
 isProgramPipeline(Pipeline) ->
   call(5783, <<Pipeline:?GLuint>>).
@@ -15802,33 +7645,7 @@ isProgramPipeline(Pipeline) ->
 %% retrieve. The value of the parameter is written to the variable whose address is given
 %% by  `Params' . 
 %%
-%%  If  `Pname'  is `?GL_ACTIVE_PROGRAM', the name of the active program object of
-%% the program pipeline object is returned in  `Params' . 
-%%
-%%  If  `Pname'  is `?GL_VERTEX_SHADER', the name of the current program object for
-%% the vertex shader type of the program pipeline object is returned in  `Params' . 
-%%
-%%  If  `Pname'  is `?GL_TESS_CONTROL_SHADER', the name of the current program object
-%% for the tessellation control shader type of the program pipeline object is returned in  `Params' 
-%% . 
-%%
-%%  If  `Pname'  is `?GL_TESS_EVALUATION_SHADER', the name of the current program
-%% object for the tessellation evaluation shader type of the program pipeline object is returned
-%% in  `Params' . 
-%%
-%%  If  `Pname'  is `?GL_GEOMETRY_SHADER', the name of the current program object
-%% for the geometry shader type of the program pipeline object is returned in  `Params' .
-%% 
-%%
-%%  If  `Pname'  is `?GL_FRAGMENT_SHADER', the name of the current program object
-%% for the fragment shader type of the program pipeline object is returned in  `Params' .
-%% 
-%%
-%%  If  `Pname'  is `?GL_INFO_LOG_LENGTH', the length of the info log, including
-%% the null terminator, is returned in  `Params' . If there is no info log, zero is returned.
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramPipeline.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetProgramPipeline.xhtml">external</a> documentation.
 -spec getProgramPipelineiv(Pipeline, Pname) -> integer() when Pipeline :: integer(),Pname :: enum().
 getProgramPipelineiv(Pipeline,Pname) ->
   call(5784, <<Pipeline:?GLuint,Pname:?GLenum>>).
@@ -15840,62 +7657,7 @@ getProgramPipelineiv(Pipeline,Pname) ->
 %% which should be a value returned by  {@link gl:getUniformLocation/2} . ``gl:programUniform''
 %%  operates on the program object specified by  `Program' .
 %%
-%% The commands ``gl:programUniform{1|2|3|4}{f|i|ui}'' are used to change the value of
-%% the uniform variable specified by  `Location'  using the values passed as arguments.
-%% The number specified in the command should match the number of components in the data
-%% type of the specified uniform variable (e.g., `1' for float, int, unsigned int, bool;
-%% `2' for vec2, ivec2, uvec2, bvec2, etc.). The suffix `f' indicates that floating-point
-%% values are being passed; the suffix `i' indicates that integer values are being passed;
-%% the suffix `ui' indicates that unsigned integer values are being passed, and this
-%% type should also match the data type of the specified uniform variable. The `i' variants
-%% of this function should be used to provide values for uniform variables defined as int, ivec2
-%% , ivec3, ivec4, or arrays of these. The `ui' variants of this function should be
-%% used to provide values for uniform variables defined as unsigned int, uvec2, uvec3, uvec4,
-%% or arrays of these. The `f' variants should be used to provide values for uniform
-%% variables of type float, vec2, vec3, vec4, or arrays of these. Either the `i', `ui'
-%%  or `f' variants may be used to provide values for uniform variables of type bool, bvec2
-%% , bvec3, bvec4, or arrays of these. The uniform variable will be set to false if the input
-%% value is 0 or 0.0f, and it will be set to true otherwise.
-%%
-%% All active uniform variables defined in a program object are initialized to 0 when the
-%% program object is linked successfully. They retain the values assigned to them by a call
-%% to ``gl:programUniform'' until the next successful link operation occurs on the program
-%% object, when they are once again initialized to 0.
-%%
-%% The commands ``gl:programUniform{1|2|3|4}{f|i|ui}v'' can be used to modify a single
-%% uniform variable or a uniform variable array. These commands pass a count and a pointer
-%% to the values to be loaded into a uniform variable or a uniform variable array. A count
-%% of 1 should be used if modifying the value of a single uniform variable, and a count of
-%% 1 or greater can be used to modify an entire array or part of an array. When loading `n'
-%%  elements starting at an arbitrary position `m' in a uniform variable array, elements
-%% `m' + `n' - 1 in the array will be replaced with the new values. If  `M'  +  `N' 
-%%  - 1 is larger than the size of the uniform variable array, values for all array elements
-%% beyond the end of the array will be ignored. The number specified in the name of the command
-%% indicates the number of components for each element in  `Value' , and it should match
-%% the number of components in the data type of the specified uniform variable (e.g., `1'
-%%  for float, int, bool; `2' for vec2, ivec2, bvec2, etc.). The data type specified
-%% in the name of the command must match the data type for the specified uniform variable
-%% as described previously for ``gl:programUniform{1|2|3|4}{f|i|ui}''.
-%%
-%% For uniform variable arrays, each element of the array is considered to be of the type
-%% indicated in the name of the command (e.g., ``gl:programUniform3f'' or ``gl:programUniform3fv''
-%%  can be used to load a uniform variable array of type vec3). The number of elements of
-%% the uniform variable array to be modified is specified by  `Count' 
-%%
-%% The commands ``gl:programUniformMatrix{2|3|4|2x3|3x2|2x4|4x2|3x4|4x3}fv''  are used
-%% to modify a matrix or an array of matrices. The numbers in the command name are interpreted
-%% as the dimensionality of the matrix. The number `2' indicates a 2 × 2 matrix (i.e.,
-%% 4 values), the number `3' indicates a 3 × 3 matrix (i.e., 9 values), and the number `4'
-%%  indicates a 4 × 4 matrix (i.e., 16 values). Non-square matrix dimensionality is explicit,
-%% with the first number representing the number of columns and the second number representing
-%% the number of rows. For example,  `2x4' indicates a 2 × 4 matrix with 2 columns and
-%% 4 rows (i.e., 8 values). If  `Transpose'  is `?GL_FALSE', each matrix is assumed
-%% to be supplied in column major order. If  `Transpose'  is `?GL_TRUE', each matrix
-%% is assumed to be supplied in row major order. The  `Count'  argument indicates the
-%% number of matrices to be passed. A count of 1 should be used if modifying the value of
-%% a single matrix, and a count greater than 1 can be used to modify an array of matrices.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glProgramUniform.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glProgramUniform.xhtml">external</a> documentation.
 -spec programUniform1i(Program, Location, V0) -> 'ok' when Program :: integer(),Location :: integer(),V0 :: integer().
 programUniform1i(Program,Location,V0) ->
   cast(5785, <<Program:?GLuint,Location:?GLint,V0:?GLint>>).
@@ -16269,15 +8031,7 @@ programUniformMatrix4x3dv(Program,Location,Transpose,Value) ->
 %% this as an opportunity to perform any internal shader modifications that may be required
 %% to ensure correct operation of the installed shaders given the current GL state. 
 %%
-%%  After a program pipeline has been validated, its validation status is set to `?GL_TRUE'
-%% . The validation status of a program pipeline object may be queried by calling  {@link gl:getProgramPipelineiv/2} 
-%%  with parameter `?GL_VALIDATE_STATUS'. 
-%%
-%%  If  `Pipeline'  is a name previously returned from a call to  {@link gl:genProgramPipelines/1} 
-%%  but that has not yet been bound by a call to  {@link gl:bindProgramPipeline/1} , a new program
-%% pipeline object is created with name  `Pipeline'  and the default state vector. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glValidateProgramPipeline.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glValidateProgramPipeline.xhtml">external</a> documentation.
 -spec validateProgramPipeline(Pipeline) -> 'ok' when Pipeline :: integer().
 validateProgramPipeline(Pipeline) ->
   cast(5835, <<Pipeline:?GLuint>>).
@@ -16291,38 +8045,35 @@ validateProgramPipeline(Pipeline) ->
 %% of characters written into  `InfoLog'  is returned in the integer whose address is
 %% given by  `Length' . If  `Length'  is `?NULL', no length is returned. 
 %%
-%%  The actual length of the info log for the program pipeline may be determined by calling  {@link gl:getProgramPipelineiv/2} 
-%%  with  `Pname'  set to `?GL_INFO_LOG_LENGTH'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetProgramPipelineInfoLog.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetProgramPipelineInfoLog.xhtml">external</a> documentation.
 -spec getProgramPipelineInfoLog(Pipeline, BufSize) -> string() when Pipeline :: integer(),BufSize :: integer().
 getProgramPipelineInfoLog(Pipeline,BufSize) ->
   call(5836, <<Pipeline:?GLuint,BufSize:?GLsizei>>).
 
 %% @doc glVertexAttribL
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribL.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexAttribL1d(Index, X) -> 'ok' when Index :: integer(),X :: float().
 vertexAttribL1d(Index,X) ->
   cast(5837, <<Index:?GLuint,0:32,X:?GLdouble>>).
 
 %% @doc glVertexAttribL
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribL.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexAttribL2d(Index, X, Y) -> 'ok' when Index :: integer(),X :: float(),Y :: float().
 vertexAttribL2d(Index,X,Y) ->
   cast(5838, <<Index:?GLuint,0:32,X:?GLdouble,Y:?GLdouble>>).
 
 %% @doc glVertexAttribL
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribL.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexAttribL3d(Index, X, Y, Z) -> 'ok' when Index :: integer(),X :: float(),Y :: float(),Z :: float().
 vertexAttribL3d(Index,X,Y,Z) ->
   cast(5839, <<Index:?GLuint,0:32,X:?GLdouble,Y:?GLdouble,Z:?GLdouble>>).
 
 %% @doc glVertexAttribL
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribL.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexAttribL4d(Index, X, Y, Z, W) -> 'ok' when Index :: integer(),X :: float(),Y :: float(),Z :: float(),W :: float().
 vertexAttribL4d(Index,X,Y,Z,W) ->
   cast(5840, <<Index:?GLuint,0:32,X:?GLdouble,Y:?GLdouble,Z:?GLdouble,W:?GLdouble>>).
@@ -16345,7 +8096,7 @@ vertexAttribL4dv(Index,{X,Y,Z,W}) ->  vertexAttribL4d(Index,X,Y,Z,W).
 
 %% @doc glVertexAttribLPointer
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribLPointer.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec vertexAttribLPointer(Index, Size, Type, Stride, Pointer) -> 'ok' when Index :: integer(),Size :: integer(),Type :: enum(),Stride :: integer(),Pointer :: offset()|mem().
 vertexAttribLPointer(Index,Size,Type,Stride,Pointer) when  is_integer(Pointer) ->
   cast(5841, <<Index:?GLuint,Size:?GLint,Type:?GLenum,Stride:?GLsizei,Pointer:?GLuint>>);
@@ -16355,14 +8106,14 @@ vertexAttribLPointer(Index,Size,Type,Stride,Pointer) ->
 
 %% @doc glGetVertexAttribL
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetVertexAttribL.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getVertexAttribLdv(Index, Pname) -> {float(),float(),float(),float()} when Index :: integer(),Pname :: enum().
 getVertexAttribLdv(Index,Pname) ->
   call(5843, <<Index:?GLuint,Pname:?GLenum>>).
 
 %% @doc glViewportArrayv
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glViewportArrayv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec viewportArrayv(First, V) -> 'ok' when First :: integer(),V :: [{float(),float(),float(),float()}].
 viewportArrayv(First,V) ->
   VLen = length(V),
@@ -16383,27 +8134,7 @@ viewportArrayv(First,V) ->
 %% coordinates to window coordinates. Let  (x nd y nd) be normalized device coordinates. Then the window
 %% coordinates  (x w y w) are computed as follows: 
 %%
-%%  x w=(x nd+1) (width/2)+x
-%%
-%%  y w=(y nd+1) (height/2)+y
-%%
-%%  The location of the viewport's bottom left corner, given by ( x,  y) is clamped to be
-%% within the implementaiton-dependent viewport bounds range. The viewport bounds range [
-%% min,  max] can be determined by calling  {@link gl:getBooleanv/1}  with argument `?GL_VIEWPORT_BOUNDS_RANGE'
-%% . Viewport width and height are silently clamped to a range that depends on the implementation.
-%% To query this range, call  {@link gl:getBooleanv/1}  with argument `?GL_MAX_VIEWPORT_DIMS'. 
-%%
-%%  The precision with which the GL interprets the floating point viewport bounds is implementation-dependent
-%% and may be determined by querying the impementation-defined constant `?GL_VIEWPORT_SUBPIXEL_BITS'
-%% . 
-%%
-%%  Calling ``gl:viewportIndexedfv'' is equivalent to calling see `glViewportArray'
-%% with  `First'  set to  `Index' ,  `Count'  set to 1 and  `V'  passsed directly.
-%% ``gl:viewportIndexedf'' is equivalent to:  void glViewportIndexedf(GLuint index, GLfloat
-%% x, GLfloat y, GLfloat w, GLfloat h) { const float v[4] = { x, y, w, h }; glViewportArrayv(index,
-%% 1, v); }
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glViewportIndexed.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glViewportIndexed.xhtml">external</a> documentation.
 -spec viewportIndexedf(Index, X, Y, W, H) -> 'ok' when Index :: integer(),X :: float(),Y :: float(),W :: float(),H :: float().
 viewportIndexedf(Index,X,Y,W,H) ->
   cast(5845, <<Index:?GLuint,X:?GLfloat,Y:?GLfloat,W:?GLfloat,H:?GLfloat>>).
@@ -16416,7 +8147,7 @@ viewportIndexedfv(Index,{V1,V2,V3,V4}) ->
 
 %% @doc glScissorArrayv
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glScissorArrayv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec scissorArrayv(First, V) -> 'ok' when First :: integer(),V :: [{integer(),integer(),integer(),integer()}].
 scissorArrayv(First,V) ->
   VLen = length(V),
@@ -16425,21 +8156,21 @@ scissorArrayv(First,V) ->
 
 %% @doc glScissorIndexe
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glScissorIndexe.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec scissorIndexed(Index, Left, Bottom, Width, Height) -> 'ok' when Index :: integer(),Left :: integer(),Bottom :: integer(),Width :: integer(),Height :: integer().
 scissorIndexed(Index,Left,Bottom,Width,Height) ->
   cast(5848, <<Index:?GLuint,Left:?GLint,Bottom:?GLint,Width:?GLsizei,Height:?GLsizei>>).
 
 %% @doc glScissorIndexe
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glScissorIndexe.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec scissorIndexedv(Index, V) -> 'ok' when Index :: integer(),V :: {integer(),integer(),integer(),integer()}.
 scissorIndexedv(Index,{V1,V2,V3,V4}) ->
   cast(5849, <<Index:?GLuint,V1:?GLint,V2:?GLint,V3:?GLint,V4:?GLint>>).
 
 %% @doc glDepthRangeArrayv
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDepthRangeArrayv.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec depthRangeArrayv(First, V) -> 'ok' when First :: integer(),V :: [{clamp(),clamp()}].
 depthRangeArrayv(First,V) ->
   VLen = length(V),
@@ -16448,7 +8179,7 @@ depthRangeArrayv(First,V) ->
 
 %% @doc glDepthRangeIndexe
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDepthRangeIndexe.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec depthRangeIndexed(Index, N, F) -> 'ok' when Index :: integer(),N :: clamp(),F :: clamp().
 depthRangeIndexed(Index,N,F) ->
   cast(5851, <<Index:?GLuint,0:32,N:?GLclampd,F:?GLclampd>>).
@@ -16467,7 +8198,7 @@ getDoublei_v(Target,Index) ->
 
 %% @doc glDebugMessageControlARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDebugMessageControlARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec debugMessageControlARB(Source, Type, Severity, Ids, Enabled) -> 'ok' when Source :: enum(),Type :: enum(),Severity :: enum(),Ids :: [integer()],Enabled :: 0|1.
 debugMessageControlARB(Source,Type,Severity,Ids,Enabled) ->
   IdsLen = length(Ids),
@@ -16476,7 +8207,7 @@ debugMessageControlARB(Source,Type,Severity,Ids,Enabled) ->
 
 %% @doc glDebugMessageInsertARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDebugMessageInsertARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec debugMessageInsertARB(Source, Type, Id, Severity, Buf) -> 'ok' when Source :: enum(),Type :: enum(),Id :: integer(),Severity :: enum(),Buf :: string().
 debugMessageInsertARB(Source,Type,Id,Severity,Buf) ->
   BufLen = length(Buf),
@@ -16484,14 +8215,14 @@ debugMessageInsertARB(Source,Type,Id,Severity,Buf) ->
 
 %% @doc glGetDebugMessageLogARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetDebugMessageLogARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getDebugMessageLogARB(Count, Bufsize) -> {integer(),Sources :: [enum()],Types :: [enum()],Ids :: [integer()],Severities :: [enum()],MessageLog :: [string()]} when Count :: integer(),Bufsize :: integer().
 getDebugMessageLogARB(Count,Bufsize) ->
   call(5856, <<Count:?GLuint,Bufsize:?GLsizei>>).
 
 %% @doc glGetGraphicsResetStatusARB
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetGraphicsResetStatusARB.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getGraphicsResetStatusARB() -> enum().
 getGraphicsResetStatusARB() ->
   call(5857, <<>>).
@@ -16504,17 +8235,7 @@ getGraphicsResetStatusARB() ->
 %% is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID'
 %% . 
 %%
-%% ``gl:drawArraysInstancedBaseInstance'' has the same effect as:  if ( mode or count is
-%% invalid ) generate appropriate error else { for (int i = 0; i &lt; primcount ; i++) {
-%% instanceID = i; glDrawArrays(mode, first, count); } instanceID = 0; }
-%%
-%%  Specific vertex attributes may be classified as `instanced' through the use of  {@link gl:vertexAttribDivisor/2} 
-%% . Instanced vertex attributes supply per-instance vertex data to the vertex shader. The
-%% index of the vertex fetched from the enabled instanced vertex attribute arrays is calculated
-%% as: |gl_ InstanceID/divisor|&amp;plus; baseInstance. Note that  `Baseinstance'  does not affect the shader-visible
-%% value of `?gl_InstanceID'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawArraysInstancedBaseInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawArraysInstancedBaseInstance.xhtml">external</a> documentation.
 -spec drawArraysInstancedBaseInstance(Mode, First, Count, Primcount, Baseinstance) -> 'ok' when Mode :: enum(),First :: integer(),Count :: integer(),Primcount :: integer(),Baseinstance :: integer().
 drawArraysInstancedBaseInstance(Mode,First,Count,Primcount,Baseinstance) ->
   cast(5858, <<Mode:?GLenum,First:?GLint,Count:?GLsizei,Primcount:?GLsizei,Baseinstance:?GLuint>>).
@@ -16527,17 +8248,7 @@ drawArraysInstancedBaseInstance(Mode,First,Count,Primcount,Baseinstance) ->
 %% is an internal 32-bit integer counter that may be read by a vertex shader as `?gl_InstanceID'
 %% . 
 %%
-%% ``gl:drawElementsInstancedBaseInstance'' has the same effect as:  if (mode, count, or
-%% type is invalid ) generate appropriate error else { for (int i = 0; i &lt; primcount ;
-%% i++) { instanceID = i; glDrawElements(mode, count, type, indices); } instanceID = 0; }
-%%
-%%  Specific vertex attributes may be classified as `instanced' through the use of  {@link gl:vertexAttribDivisor/2} 
-%% . Instanced vertex attributes supply per-instance vertex data to the vertex shader. The
-%% index of the vertex fetched from the enabled instanced vertex attribute arrays is calculated
-%% as |gl_ InstanceID/divisor|&amp;plus; baseInstance. Note that  `Baseinstance'  does not affect the shader-visible
-%% value of `?gl_InstanceID'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElementsInstancedBaseInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawElementsInstancedBaseInstance.xhtml">external</a> documentation.
 -spec drawElementsInstancedBaseInstance(Mode, Count, Type, Indices, Primcount, Baseinstance) -> 'ok' when Mode :: enum(),Count :: integer(),Type :: enum(),Indices :: offset()|mem(),Primcount :: integer(),Baseinstance :: integer().
 drawElementsInstancedBaseInstance(Mode,Count,Type,Indices,Primcount,Baseinstance) when  is_integer(Indices) ->
   cast(5859, <<Mode:?GLenum,Count:?GLsizei,Type:?GLenum,Indices:?GLuint,Primcount:?GLsizei,Baseinstance:?GLuint>>);
@@ -16555,13 +8266,7 @@ drawElementsInstancedBaseInstance(Mode,Count,Type,Indices,Primcount,Baseinstance
 %% conditions). The operation is undefined if the sum would be negative. The  `Basevertex' 
 %%  has no effect on the shader-visible value of `?gl_VertexID'. 
 %%
-%%  Specific vertex attributes may be classified as `instanced' through the use of  {@link gl:vertexAttribDivisor/2} 
-%% . Instanced vertex attributes supply per-instance vertex data to the vertex shader. The
-%% index of the vertex fetched from the enabled instanced vertex attribute arrays is calculated
-%% as |gl_ InstanceID/divisor|&amp;plus; baseInstance. Note that  `Baseinstance'  does not affect the shader-visible
-%% value of `?gl_InstanceID'. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawElementsInstancedBaseVertexBaseInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glDrawElementsInstancedBaseVertexBaseInstance.xhtml">external</a> documentation.
 -spec drawElementsInstancedBaseVertexBaseInstance(Mode, Count, Type, Indices, Primcount, Basevertex, Baseinstance) -> 'ok' when Mode :: enum(),Count :: integer(),Type :: enum(),Indices :: offset()|mem(),Primcount :: integer(),Basevertex :: integer(),Baseinstance :: integer().
 drawElementsInstancedBaseVertexBaseInstance(Mode,Count,Type,Indices,Primcount,Basevertex,Baseinstance) when  is_integer(Indices) ->
   cast(5861, <<Mode:?GLenum,Count:?GLsizei,Type:?GLenum,Indices:?GLuint,Primcount:?GLsizei,Basevertex:?GLint,Baseinstance:?GLuint>>);
@@ -16571,21 +8276,21 @@ drawElementsInstancedBaseVertexBaseInstance(Mode,Count,Type,Indices,Primcount,Ba
 
 %% @doc glDrawTransformFeedbackInstance
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawTransformFeedbackInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec drawTransformFeedbackInstanced(Mode, Id, Primcount) -> 'ok' when Mode :: enum(),Id :: integer(),Primcount :: integer().
 drawTransformFeedbackInstanced(Mode,Id,Primcount) ->
   cast(5863, <<Mode:?GLenum,Id:?GLuint,Primcount:?GLsizei>>).
 
 %% @doc glDrawTransformFeedbackStreamInstance
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDrawTransformFeedbackStreamInstance.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec drawTransformFeedbackStreamInstanced(Mode, Id, Stream, Primcount) -> 'ok' when Mode :: enum(),Id :: integer(),Stream :: integer(),Primcount :: integer().
 drawTransformFeedbackStreamInstanced(Mode,Id,Stream,Primcount) ->
   cast(5864, <<Mode:?GLenum,Id:?GLuint,Stream:?GLuint,Primcount:?GLsizei>>).
 
 %% @doc glGetInternalformat
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glGetInternalformat.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec getInternalformativ(Target, Internalformat, Pname, BufSize) -> [integer()] when Target :: enum(),Internalformat :: enum(),Pname :: enum(),BufSize :: integer().
 getInternalformativ(Target,Internalformat,Pname,BufSize) ->
   call(5865, <<Target:?GLenum,Internalformat:?GLenum,Pname:?GLenum,BufSize:?GLsizei>>).
@@ -16599,55 +8304,7 @@ getInternalformativ(Target,Internalformat,Pname,BufSize) ->
 %% any existing binding to the image unit is broken.  `Level'  specifies the level of
 %% the texture to bind to the image unit. 
 %%
-%%  If  `Texture'  is the name of a one-, two-, or three-dimensional array texture, a
-%% cube map or cube map array texture, or a two-dimensional multisample array texture, then
-%% it is possible to bind either the entire array, or only a single layer of the array to
-%% the image unit. In such cases, if  `Layered'  is `?GL_TRUE', the entire array
-%% is attached to the image unit and  `Layer'  is ignored. However, if  `Layered'  is `?GL_FALSE'
-%%  then  `Layer'  specifies the layer of the array to attach to the image unit. 
-%%
-%%  `Access'  specifies the access types to be performed by shaders and may be set to `?GL_READ_ONLY'
-%% , `?GL_WRITE_ONLY', or `?GL_READ_WRITE' to indicate read-only, write-only or
-%% read-write access, respectively. Violation of the access type specified in  `Access' 
-%% (for example, if a shader writes to an image bound with  `Access'  set to `?GL_READ_ONLY'
-%% ) will lead to undefined results, possibly including program termination. 
-%%
-%%  `Format'  specifies the format that is to be used when performing formatted stores
-%% into the image from shaders.  `Format'  must be compatible with the texture's internal
-%% format and must be one of the formats listed in the following table. 
-%%
-%% <table><tbody><tr><td>` Image Unit Format '</td><td>` Format Qualifier '</td></tr>
-%% </tbody><tbody><tr><td>`?GL_RGBA32F'</td><td>rgba32f</td></tr><tr><td>`?GL_RGBA16F'
-%% </td><td>rgba16f</td></tr><tr><td>`?GL_RG32F'</td><td>rg32f</td></tr><tr><td>`?GL_RG16F'
-%% </td><td>rg16f</td></tr><tr><td>`?GL_R11F_G11F_B10F'</td><td>r11f_g11f_b10f</td></tr>
-%% <tr><td>`?GL_R32F'</td><td>r32f</td></tr><tr><td>`?GL_R16F'</td><td>r16f</td></tr>
-%% <tr><td>`?GL_RGBA32UI'</td><td>rgba32ui</td></tr><tr><td>`?GL_RGBA16UI'</td><td>
-%% rgba16ui</td></tr><tr><td>`?GL_RGB10_A2UI'</td><td>rgb10_a2ui</td></tr><tr><td>`?GL_RGBA8UI'
-%% </td><td>rgba8ui</td></tr><tr><td>`?GL_RG32UI'</td><td>rg32ui</td></tr><tr><td>`?GL_RG16UI'
-%% </td><td>rg16ui</td></tr><tr><td>`?GL_RG8UI'</td><td>rg8ui</td></tr><tr><td>`?GL_R32UI'
-%% </td><td>r32ui</td></tr><tr><td>`?GL_R16UI'</td><td>r16ui</td></tr><tr><td>`?GL_R8UI'
-%% </td><td>r8ui</td></tr><tr><td>`?GL_RGBA32I'</td><td>rgba32i</td></tr><tr><td>`?GL_RGBA16I'
-%% </td><td>rgba16i</td></tr><tr><td>`?GL_RGBA8I'</td><td>rgba8i</td></tr><tr><td>`?GL_RG32I'
-%% </td><td>rg32i</td></tr><tr><td>`?GL_RG16I'</td><td>rg16i</td></tr><tr><td>`?GL_RG8I'
-%% </td><td>rg8i</td></tr><tr><td>`?GL_R32I'</td><td>r32i</td></tr><tr><td>`?GL_R16I'
-%% </td><td>r16i</td></tr><tr><td>`?GL_R8I'</td><td>r8i</td></tr><tr><td>`?GL_RGBA16'
-%% </td><td>rgba16</td></tr><tr><td>`?GL_RGB10_A2'</td><td>rgb10_a2</td></tr><tr><td>`?GL_RGBA8'
-%% </td><td>rgba8</td></tr><tr><td>`?GL_RG16'</td><td>rg16</td></tr><tr><td>`?GL_RG8'
-%% </td><td>rg8</td></tr><tr><td>`?GL_R16'</td><td>r16</td></tr><tr><td>`?GL_R8'</td>
-%% <td>r8</td></tr><tr><td>`?GL_RGBA16_SNORM'</td><td>rgba16_snorm</td></tr><tr><td>`?GL_RGBA8_SNORM'
-%% </td><td>rgba8_snorm</td></tr><tr><td>`?GL_RG16_SNORM'</td><td>rg16_snorm</td></tr><tr>
-%% <td>`?GL_RG8_SNORM'</td><td>rg8_snorm</td></tr><tr><td>`?GL_R16_SNORM'</td><td>r16_snorm
-%% </td></tr><tr><td>`?GL_R8_SNORM'</td><td>r8_snorm</td></tr></tbody></table>
-%%
-%%  When a texture is bound to an image unit, the  `Format'  parameter for the image unit
-%% need not exactly match the texture internal format as long as the formats are considered
-%% compatible as defined in the OpenGL Specification. The matching criterion used for a given
-%% texture may be determined by calling  {@link gl:getTexParameterfv/2}  with  `Value'  set
-%% to `?GL_IMAGE_FORMAT_COMPATIBILITY_TYPE', with return values of `?GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE'
-%%  and `?GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS', specifying matches by size and class,
-%% respectively. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindImageTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glBindImageTexture.xhtml">external</a> documentation.
 -spec bindImageTexture(Unit, Texture, Level, Layered, Layer, Access, Format) -> 'ok' when Unit :: integer(),Texture :: integer(),Level :: integer(),Layered :: 0|1,Layer :: integer(),Access :: enum(),Format :: enum().
 bindImageTexture(Unit,Texture,Level,Layered,Layer,Access,Format) ->
   cast(5866, <<Unit:?GLuint,Texture:?GLuint,Level:?GLint,Layered:?GLboolean,0:24,Layer:?GLint,Access:?GLenum,Format:?GLenum>>).
@@ -16661,120 +8318,7 @@ bindImageTexture(Unit,Texture,Level,Layered,Layer,Access,Format) ->
 %% the set of operations that are synchronized with shader stores; the bits used in  `Barriers' 
 %%  are as follows: 
 %%
-%% 
-%%
-%% `?GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT':  If set, vertex data sourced from buffer objects
-%% after the barrier will reflect data written by shaders prior to the barrier. The set of
-%% buffer objects affected by this bit is derived from the buffer object bindings used for
-%% generic vertex attributes derived from the `?GL_VERTEX_ATTRIB_ARRAY_BUFFER' bindings.
-%% 
-%%
-%% `?GL_ELEMENT_ARRAY_BARRIER_BIT':  If set, vertex array indices sourced from buffer
-%% objects after the barrier will reflect data written by shaders prior to the barrier. The
-%% buffer objects affected by this bit are derived from the `?GL_ELEMENT_ARRAY_BUFFER'
-%% binding. 
-%%
-%% `?GL_UNIFORM_BARRIER_BIT':  Shader uniforms sourced from buffer objects after the
-%% barrier will reflect data written by shaders prior to the barrier. 
-%%
-%% `?GL_TEXTURE_FETCH_BARRIER_BIT':  Texture fetches from shaders, including fetches
-%% from buffer object memory via buffer textures, after the barrier will reflect data written
-%% by shaders prior to the barrier. 
-%%
-%% `?GL_SHADER_IMAGE_ACCESS_BARRIER_BIT':  Memory accesses using shader image load,
-%% store, and atomic built-in functions issued after the barrier will reflect data written
-%% by shaders prior to the barrier. Additionally, image stores and atomics issued after the
-%% barrier will not execute until all memory accesses (e.g., loads, stores, texture fetches,
-%% vertex fetches) initiated prior to the barrier complete. 
-%%
-%% `?GL_COMMAND_BARRIER_BIT':  Command data sourced from buffer objects by Draw*Indirect
-%% commands after the barrier will reflect data written by shaders prior to the barrier.
-%% The buffer objects affected by this bit are derived from the `?GL_DRAW_INDIRECT_BUFFER'
-%%  binding. 
-%%
-%% `?GL_PIXEL_BUFFER_BARRIER_BIT':  Reads and writes of buffer objects via the `?GL_PIXEL_PACK_BUFFER'
-%%  and `?GL_PIXEL_UNPACK_BUFFER' bindings (via  {@link gl:readPixels/7} ,  {@link gl:texSubImage1D/7} 
-%% , etc.) after the barrier will reflect data written by shaders prior to the barrier. Additionally,
-%% buffer object writes issued after the barrier will wait on the completion of all shader
-%% writes initiated prior to the barrier. 
-%%
-%% `?GL_TEXTURE_UPDATE_BARRIER_BIT':  Writes to a texture via ``gl:tex(Sub)Image*'', ``gl:copyTex(Sub)Image*''
-%% , ``gl:compressedTex(Sub)Image*'', and reads via  {@link gl:getTexImage/5}  after the barrier
-%% will reflect data written by shaders prior to the barrier. Additionally, texture writes
-%% from these commands issued after the barrier will not execute until all shader writes
-%% initiated prior to the barrier complete. 
-%%
-%% `?GL_BUFFER_UPDATE_BARRIER_BIT':  Reads or writes via  {@link gl:bufferSubData/4} ,  {@link gl:copyBufferSubData/5} 
-%% , or  {@link gl:getBufferSubData/4} , or to buffer object memory mapped by see `glMapBuffer'
-%%  or see `glMapBufferRange' after the barrier will reflect data written by shaders
-%% prior to the barrier. Additionally, writes via these commands issued after the barrier
-%% will wait on the completion of any shader writes to the same memory initiated prior to
-%% the barrier. 
-%%
-%% `?GL_FRAMEBUFFER_BARRIER_BIT':  Reads and writes via framebuffer object attachments
-%% after the barrier will reflect data written by shaders prior to the barrier. Additionally,
-%% framebuffer writes issued after the barrier will wait on the completion of all shader
-%% writes issued prior to the barrier. 
-%%
-%% `?GL_TRANSFORM_FEEDBACK_BARRIER_BIT':  Writes via transform feedback bindings after
-%% the barrier will reflect data written by shaders prior to the barrier. Additionally, transform
-%% feedback writes issued after the barrier will wait on the completion of all shader writes
-%% issued prior to the barrier. 
-%%
-%% `?GL_ATOMIC_COUNTER_BARRIER_BIT':  Accesses to atomic counters after the barrier
-%% will reflect writes prior to the barrier. 
-%%
-%%  If  `Barriers'  is `?GL_ALL_BARRIER_BITS', shader memory accesses will be synchronized
-%% relative to all the operations described above. 
-%%
-%%  Implementations may cache buffer object and texture image memory that could be written
-%% by shaders in multiple caches; for example, there may be separate caches for texture,
-%% vertex fetching, and one or more caches for shader memory accesses. Implementations are
-%% not required to keep these caches coherent with shader memory writes. Stores issued by
-%% one invocation may not be immediately observable by other pipeline stages or other shader
-%% invocations because the value stored may remain in a cache local to the processor executing
-%% the store, or because data overwritten by the store is still in a cache elsewhere in the
-%% system. When ``gl:memoryBarrier'' is called, the GL flushes and/or invalidates any caches
-%% relevant to the operations specified by the  `Barriers'  parameter to ensure consistent
-%% ordering of operations across the barrier. 
-%%
-%%  To allow for independent shader invocations to communicate by reads and writes to a common
-%% memory address, image variables in the OpenGL Shading Language may be declared as "coherent".
-%% Buffer object or texture image memory accessed through such variables may be cached only
-%% if caches are automatically updated due to stores issued by any other shader invocation.
-%% If the same address is accessed using both coherent and non-coherent variables, the accesses
-%% using variables declared as coherent will observe the results stored using coherent variables
-%% in other invocations. Using variables declared as "coherent" guarantees only that the
-%% results of stores will be immediately visible to shader invocations using similarly-declared
-%% variables; calling ``gl:memoryBarrier'' is required to ensure that the stores are visible
-%% to other operations. 
-%%
-%%  The following guidelines may be helpful in choosing when to use coherent memory accesses
-%% and when to use barriers. 
-%%
-%% Data that are read-only or constant may be accessed without using coherent variables or
-%% calling MemoryBarrier(). Updates to the read-only data via API calls such as BufferSubData
-%% will invalidate shader caches implicitly as required.
-%%
-%% Data that are shared between shader invocations at a fine granularity (e.g., written by
-%% one invocation, consumed by another invocation) should use coherent variables to read
-%% and write the shared data.
-%%
-%% Data written by one shader invocation and consumed by other shader invocations launched
-%% as a result of its execution ("dependent invocations") should use coherent variables in
-%% the producing shader invocation and call memoryBarrier() after the last write. The consuming
-%% shader invocation should also use coherent variables.
-%%
-%% Data written to image variables in one rendering pass and read by the shader in a later
-%% pass need not use coherent variables or memoryBarrier(). Calling MemoryBarrier() with
-%% the SHADER_IMAGE_ACCESS_BARRIER_BIT set in  `Barriers'  between passes is necessary.
-%%
-%% Data written by the shader in one rendering pass and read by another mechanism (e.g.,
-%% vertex or index buffer pulling) in a later pass need not use coherent variables or memoryBarrier().
-%% Calling ``gl:memoryBarrier'' with the appropriate bits set in  `Barriers'  between
-%% passes is necessary.
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glMemoryBarrier.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glMemoryBarrier.xhtml">external</a> documentation.
 -spec memoryBarrier(Barriers) -> 'ok' when Barriers :: integer().
 memoryBarrier(Barriers) ->
   cast(5867, <<Barriers:?GLbitfield>>).
@@ -16787,27 +8331,7 @@ memoryBarrier(Barriers) ->
 %% the image may still be modified, however, its storage requirements may not change. Such
 %% a texture is referred to as an `immutable-format' texture. 
 %%
-%%  Calling ``gl:texStorage1D'' is equivalent, assuming no errors are generated, to executing
-%% the following pseudo-code:  for (i = 0; i &lt; levels; i++) { glTexImage1D(target, i,
-%% internalformat, width, 0, format, type, NULL); width = max(1, (width / 2)); }
-%%
-%%  Since no texture data is actually provided, the values used in the pseudo-code for  `Format' 
-%%  and  `Type'  are irrelevant and may be considered to be any values that are legal
-%% for the chosen  `Internalformat'  enumerant.  `Internalformat'  must be one of the
-%% sized internal formats given in Table 1 below, one of the sized depth-component formats `?GL_DEPTH_COMPONENT32F'
-%% , `?GL_DEPTH_COMPONENT24', or `?GL_DEPTH_COMPONENT16', or one of the combined
-%% depth-stencil formats, `?GL_DEPTH32F_STENCIL8', or `?GL_DEPTH24_STENCIL8'. Upon
-%% success, the value of `?GL_TEXTURE_IMMUTABLE_FORMAT' becomes `?GL_TRUE'. The
-%% value of `?GL_TEXTURE_IMMUTABLE_FORMAT' may be discovered by calling  {@link gl:getTexParameterfv/2} 
-%%  with  `Pname'  set to `?GL_TEXTURE_IMMUTABLE_FORMAT'. No further changes to the
-%% dimensions or format of the texture object may be made. Using any command that might alter
-%% the dimensions or format of the texture object (such as  {@link gl:texImage1D/8}  or another
-%% call to ``gl:texStorage1D'') will result in the generation of a `?GL_INVALID_OPERATION'
-%%  error, even if it would not, in fact, alter the dimensions or format of the object. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexStorage1D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexStorage1D.xhtml">external</a> documentation.
 -spec texStorage1D(Target, Levels, Internalformat, Width) -> 'ok' when Target :: enum(),Levels :: integer(),Internalformat :: enum(),Width :: integer().
 texStorage1D(Target,Levels,Internalformat,Width) ->
   cast(5868, <<Target:?GLenum,Levels:?GLsizei,Internalformat:?GLenum,Width:?GLsizei>>).
@@ -16820,39 +8344,7 @@ texStorage1D(Target,Levels,Internalformat,Width) ->
 %% proxy texture. The contents of the image may still be modified, however, its storage requirements
 %% may not change. Such a texture is referred to as an `immutable-format' texture. 
 %%
-%%  The behavior of ``gl:texStorage2D'' depends on the  `Target'  parameter. When  `Target' 
-%%  is `?GL_TEXTURE_2D', `?GL_PROXY_TEXTURE_2D', `?GL_TEXTURE_RECTANGLE', `?GL_PROXY_TEXTURE_RECTANGLE'
-%%  or `?GL_PROXY_TEXTURE_CUBE_MAP', calling ``gl:texStorage2D'' is equivalent, assuming
-%% no errors are generated, to executing the following pseudo-code:  for (i = 0; i &lt; levels;
-%% i++) { glTexImage2D(target, i, internalformat, width, height, 0, format, type, NULL);
-%% width = max(1, (width / 2)); height = max(1, (height / 2)); }
-%%
-%%  When  `Target'  is `?GL_TEXTURE_CUBE_MAP', ``gl:texStorage2D'' is equivalent
-%% to:  for (i = 0; i &lt; levels; i++) { for (face in (+X, -X, +Y, -Y, +Z, -Z)) { glTexImage2D(face,
-%% i, internalformat, width, height, 0, format, type, NULL); } width = max(1, (width / 2));
-%% height = max(1, (height / 2)); }
-%%
-%%  When  `Target'  is `?GL_TEXTURE_1D' or `?GL_TEXTURE_1D_ARRAY', ``gl:texStorage2D''
-%%  is equivalent to:  for (i = 0; i &lt; levels; i++) { glTexImage2D(target, i, internalformat,
-%% width, height, 0, format, type, NULL); width = max(1, (width / 2)); }
-%%
-%%  Since no texture data is actually provided, the values used in the pseudo-code for  `Format' 
-%%  and  `Type'  are irrelevant and may be considered to be any values that are legal
-%% for the chosen  `Internalformat'  enumerant.  `Internalformat'  must be one of the
-%% sized internal formats given in Table 1 below, one of the sized depth-component formats `?GL_DEPTH_COMPONENT32F'
-%% , `?GL_DEPTH_COMPONENT24', or `?GL_DEPTH_COMPONENT16', or one of the combined
-%% depth-stencil formats, `?GL_DEPTH32F_STENCIL8', or `?GL_DEPTH24_STENCIL8'. Upon
-%% success, the value of `?GL_TEXTURE_IMMUTABLE_FORMAT' becomes `?GL_TRUE'. The
-%% value of `?GL_TEXTURE_IMMUTABLE_FORMAT' may be discovered by calling  {@link gl:getTexParameterfv/2} 
-%%  with  `Pname'  set to `?GL_TEXTURE_IMMUTABLE_FORMAT'. No further changes to the
-%% dimensions or format of the texture object may be made. Using any command that might alter
-%% the dimensions or format of the texture object (such as  {@link gl:texImage2D/9}  or another
-%% call to ``gl:texStorage2D'') will result in the generation of a `?GL_INVALID_OPERATION'
-%%  error, even if it would not, in fact, alter the dimensions or format of the object. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexStorage2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexStorage2D.xhtml">external</a> documentation.
 -spec texStorage2D(Target, Levels, Internalformat, Width, Height) -> 'ok' when Target :: enum(),Levels :: integer(),Internalformat :: enum(),Width :: integer(),Height :: integer().
 texStorage2D(Target,Levels,Internalformat,Width,Height) ->
   cast(5869, <<Target:?GLenum,Levels:?GLsizei,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei>>).
@@ -16866,50 +8358,21 @@ texStorage2D(Target,Levels,Internalformat,Width,Height) ->
 %% requirements may not change. Such a texture is referred to as an `immutable-format'
 %% texture. 
 %%
-%%  The behavior of ``gl:texStorage3D'' depends on the  `Target'  parameter. When  `Target' 
-%%  is `?GL_TEXTURE_3D', or `?GL_PROXY_TEXTURE_3D', calling ``gl:texStorage3D''
-%% is equivalent, assuming no errors are generated, to executing the following pseudo-code: 
-%% for (i = 0; i &lt; levels; i++) { glTexImage3D(target, i, internalformat, width, height,
-%% depth, 0, format, type, NULL); width = max(1, (width / 2)); height = max(1, (height /
-%% 2)); depth = max(1, (depth / 2)); }
-%%
-%%  When  `Target'  is `?GL_TEXTURE_2D_ARRAY', `?GL_PROXY_TEXTURE_2D_ARRAY', `?GL_TEXTURE_CUBE_MAP_ARRAY'
-%% , or `?GL_PROXY_TEXTURE_CUBE_MAP_ARRAY', ``gl:texStorage3D'' is equivalent to: 
-%% for (i = 0; i &lt; levels; i++) { glTexImage3D(target, i, internalformat, width, height,
-%% depth, 0, format, type, NULL); width = max(1, (width / 2)); height = max(1, (height /
-%% 2)); }
-%%
-%%  Since no texture data is actually provided, the values used in the pseudo-code for  `Format' 
-%%  and  `Type'  are irrelevant and may be considered to be any values that are legal
-%% for the chosen  `Internalformat'  enumerant.  `Internalformat'  must be one of the
-%% sized internal formats given in Table 1 below, one of the sized depth-component formats `?GL_DEPTH_COMPONENT32F'
-%% , `?GL_DEPTH_COMPONENT24', or `?GL_DEPTH_COMPONENT16', or one of the combined
-%% depth-stencil formats, `?GL_DEPTH32F_STENCIL8', or `?GL_DEPTH24_STENCIL8'. Upon
-%% success, the value of `?GL_TEXTURE_IMMUTABLE_FORMAT' becomes `?GL_TRUE'. The
-%% value of `?GL_TEXTURE_IMMUTABLE_FORMAT' may be discovered by calling  {@link gl:getTexParameterfv/2} 
-%%  with  `Pname'  set to `?GL_TEXTURE_IMMUTABLE_FORMAT'. No further changes to the
-%% dimensions or format of the texture object may be made. Using any command that might alter
-%% the dimensions or format of the texture object (such as  {@link gl:texImage3D/10}  or another
-%% call to ``gl:texStorage3D'') will result in the generation of a `?GL_INVALID_OPERATION'
-%%  error, even if it would not, in fact, alter the dimensions or format of the object. 
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glTexStorage3D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glTexStorage3D.xhtml">external</a> documentation.
 -spec texStorage3D(Target, Levels, Internalformat, Width, Height, Depth) -> 'ok' when Target :: enum(),Levels :: integer(),Internalformat :: enum(),Width :: integer(),Height :: integer(),Depth :: integer().
 texStorage3D(Target,Levels,Internalformat,Width,Height,Depth) ->
   cast(5870, <<Target:?GLenum,Levels:?GLsizei,Internalformat:?GLenum,Width:?GLsizei,Height:?GLsizei,Depth:?GLsizei>>).
 
 %% @doc glDepthBoundsEXT
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glDepthBoundsEXT.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec depthBoundsEXT(Zmin, Zmax) -> 'ok' when Zmin :: clamp(),Zmax :: clamp().
 depthBoundsEXT(Zmin,Zmax) ->
   cast(5871, <<Zmin:?GLclampd,Zmax:?GLclampd>>).
 
 %% @doc glStencilClearTagEXT
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/glStencilClearTagEXT.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">external</a> documentation.
 -spec stencilClearTagEXT(StencilTagBits, StencilClearTag) -> 'ok' when StencilTagBits :: integer(),StencilClearTag :: integer().
 stencilClearTagEXT(StencilTagBits,StencilClearTag) ->
   cast(5872, <<StencilTagBits:?GLsizei,StencilClearTag:?GLuint>>).
diff --git a/lib/wx/src/gen/glu.erl b/lib/wx/src/gen/glu.erl
index f641f41262..5e5f01874f 100644
--- a/lib/wx/src/gen/glu.erl
+++ b/lib/wx/src/gen/glu.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@
 %% This file is generated DO NOT EDIT
 
 %% @doc  A part of the standard OpenGL Utility api.
-%% See <a href="http://www.opengl.org/sdk/docs/man/">www.opengl.org</a>
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/">www.khronos.org</a>
 %%
 %% Booleans are represented by integers 0 and 1.
 
@@ -92,29 +92,7 @@ tesselate({Nx,Ny,Nz}, Vs) ->
 %% of decreasing resolutions called a mipmap. This is used for the antialiasing of texture
 %% mapped primitives. 
 %%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  A series of mipmap levels from  `Base'  to  `Max'  is built by decimating   `Data' 
-%%  in half  until size   1×1 is reached. At each level, each texel in the halved mipmap
-%% level is an average of the corresponding two texels in the larger mipmap level.   {@link gl:texImage1D/8} 
-%%  is called to load these mipmap levels from  `Base'  to  `Max' . If  `Max'  is
-%% larger than the highest mipmap level for the texture of the specified size, then a GLU
-%% error code is returned (see  {@link glu:errorString/1} ) and nothing is loaded. 
-%%
-%%  For example, if  `Level'  is 2 and  `Width'  is 16, the following levels are possible:
-%%   16×1,   8×1,   4×1,  2×1,   1×1. These correspond to levels 2 through 6 respectively.
-%% If  `Base'  is 3 and  `Max'  is 5, then only mipmap levels   8×1,  4×1 and   2×1
-%% are loaded. However, if  `Max'  is 7, then an error is returned and nothing is loaded
-%% since  `Max'  is larger than the highest mipmap level which is, in  this case, 6. 
-%%
-%%  The highest mipmap level can be derived from the formula  log 2(width×2 level). 
-%%
-%%  See the  {@link gl:texImage1D/8}  reference page for a description of the acceptable values
-%% for  `Type'  parameter. See the  {@link gl:drawPixels/5}   reference page for a description
-%% of the acceptable values  for  `Level'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluBuild1DMipmapLevels.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluBuild1DMipmapLevels.xml">external</a> documentation.
 -spec build1DMipmapLevels(Target, InternalFormat, Width, Format, Type, Level, Base, Max, Data) -> integer() when Target :: enum(),InternalFormat :: integer(),Width :: integer(),Format :: enum(),Type :: enum(),Level :: integer(),Base :: integer(),Max :: integer(),Data :: binary().
 build1DMipmapLevels(Target,InternalFormat,Width,Format,Type,Level,Base,Max,Data) ->
   send_bin(Data),
@@ -126,33 +104,7 @@ build1DMipmapLevels(Target,InternalFormat,Width,Format,Type,Level,Base,Max,Data)
 %% decreasing resolutions called a mipmap. This is used for the antialiasing of texture mapped
 %% primitives. 
 %%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  Initially, the  `Width'  of  `Data'  is checked to see if it is a power of 2. If
-%% not, a copy of  `Data'  is scaled up or down to the nearest power of 2. (If  `Width' 
-%%  is exactly between powers of 2, then the copy of  `Data'  will scale upwards.) This
-%% copy will be used for subsequent mipmapping operations described below.  For example, if  `Width' 
-%%  is 57, then a copy of  `Data'  will scale up to 64 before mipmapping takes place. 
-%%
-%%  Then, proxy textures (see  {@link gl:texImage1D/8} ) are used to determine if the implementation
-%% can fit the requested texture. If not,  `Width'  is continually halved until it fits. 
-%%
-%%  Next, a series of mipmap levels is built by decimating a copy of  `Data'  in half
-%% until size   1×1 is reached. At each level, each texel in the halved mipmap level is an
-%% average of the corresponding two texels in the larger mipmap level. 
-%%
-%%  {@link gl:texImage1D/8}  is called to load each of these mipmap levels. Level 0 is a copy
-%% of  `Data' .  The highest level is  (log 2)(width). For example, if  `Width'  is 64 and the implementation
-%% can store a texture of this size, the following mipmap levels are built:   64×1,   32×1,
-%%   16×1,   8×1,  4×1,   2×1, and   1×1. These correspond to  levels 0 through 6, respectively.
-%% 
-%%
-%%  See the  {@link gl:texImage1D/8}  reference page for a description of the acceptable values
-%% for the  `Type'  parameter. See the  {@link gl:drawPixels/5}   reference page for a description
-%% of the acceptable values  for the  `Data'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluBuild1DMipmaps.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluBuild1DMipmaps.xml">external</a> documentation.
 -spec build1DMipmaps(Target, InternalFormat, Width, Format, Type, Data) -> integer() when Target :: enum(),InternalFormat :: integer(),Width :: integer(),Format :: enum(),Type :: enum(),Data :: binary().
 build1DMipmaps(Target,InternalFormat,Width,Format,Type,Data) ->
   send_bin(Data),
@@ -164,32 +116,7 @@ build1DMipmaps(Target,InternalFormat,Width,Format,Type,Data) ->
 %% of decreasing resolutions called a mipmap. This is used for the antialiasing of texture
 %% mapped primitives. 
 %%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  A series of mipmap levels from  `Base'  to  `Max'  is built by decimating   `Data' 
-%%  in half along both dimensions until size   1×1 is reached. At each level, each texel
-%% in the halved mipmap level is an average of the corresponding four texels in the larger
-%% mipmap level. (In the case of rectangular images, the decimation will ultimately  reach
-%% an   N×1 or   1×N configuration. Here, two texels are averaged instead.)  {@link gl:texImage2D/9} 
-%%  is called to load these mipmap levels from  `Base'  to  `Max' . If  `Max'  is
-%% larger than the highest mipmap level for the texture of the specified size, then a GLU
-%% error code is returned (see  {@link glu:errorString/1} ) and nothing is loaded. 
-%%
-%%  For example, if  `Level'  is 2 and  `Width'  is 16 and  `Height'  is 8, the
-%% following levels are possible:   16×8,   8×4,   4×2,  2×1,   1×1. These correspond to
-%% levels 2 through 6 respectively. If  `Base'  is 3 and  `Max'  is 5, then only mipmap
-%% levels  8×4,   4×2, and   2×1 are loaded. However, if  `Max'  is 7, then an error is
-%% returned and nothing is loaded since  `Max'  is larger than the highest mipmap level
-%% which is, in this case, 6. 
-%%
-%%  The highest mipmap level can be derived from the formula  log 2(max(width height)×2 level). 
-%%
-%%  See the  {@link gl:texImage1D/8}  reference page for a description of the acceptable values
-%% for  `Format'  parameter. See the  {@link gl:drawPixels/5}   reference page for a description
-%% of the acceptable values  for  `Type'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluBuild2DMipmapLevels.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluBuild2DMipmapLevels.xml">external</a> documentation.
 -spec build2DMipmapLevels(Target, InternalFormat, Width, Height, Format, Type, Level, Base, Max, Data) -> integer() when Target :: enum(),InternalFormat :: integer(),Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Level :: integer(),Base :: integer(),Max :: integer(),Data :: binary().
 build2DMipmapLevels(Target,InternalFormat,Width,Height,Format,Type,Level,Base,Max,Data) ->
   send_bin(Data),
@@ -201,40 +128,7 @@ build2DMipmapLevels(Target,InternalFormat,Width,Height,Format,Type,Level,Base,Ma
 %% decreasing resolutions called a mipmap. This is used for the antialiasing of texture-mapped
 %% primitives. 
 %%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  Initially, the  `Width'  and  `Height'  of  `Data'  are checked to see if they
-%% are a power of 2. If not, a copy of  `Data'  (not  `Data' ), is scaled up or down
-%% to the nearest power of 2. This copy will be used for subsequent mipmapping operations
-%% described below. (If  `Width'  or  `Height'  is exactly between powers of 2, then
-%% the copy of  `Data'  will scale upwards.) For example, if  `Width'  is 57 and  `Height' 
-%%  is 23, then a copy of  `Data'  will scale up to 64 in  `Width'  and down to 16
-%% in depth, before mipmapping takes place. 
-%%
-%%  Then, proxy textures (see  {@link gl:texImage2D/9} ) are used to determine if the implementation
-%% can fit the requested texture. If not, both dimensions are continually halved until it
-%% fits. (If the OpenGL version is (&lt;= 1.0, both maximum texture dimensions are clamped
-%% to the value returned by  {@link gl:getBooleanv/1}  with the argument `?GLU_MAX_TEXTURE_SIZE'
-%% .) 
-%%
-%%  Next, a series of mipmap levels is built by decimating a copy of  `Data'  in half
-%% along both dimensions until size   1×1 is reached. At each level, each texel in the halved
-%% mipmap level is an average of the corresponding four texels in the larger mipmap level.
-%% (In the case of rectangular images, the decimation will ultimately reach an   N×1 or  1×N
-%% configuration. Here, two texels are averaged instead.) 
-%%
-%%  {@link gl:texImage2D/9}  is called to load each of these mipmap levels. Level 0 is a copy
-%% of  `Data' . The highest level is (log 2)(max(width height)). For example, if  `Width'  is 64 and  `Height' 
-%%  is 16 and the implementation can store a texture of this size, the following mipmap levels
-%% are built:   64×16,   32×8,   16×4,  8×2,   4×1,   2×1, and   1×1 These correspond to
-%% levels 0 through 6, respectively. 
-%%
-%%  See the  {@link gl:texImage1D/8}  reference page for a description of the acceptable values
-%% for  `Format'  parameter. See the  {@link gl:drawPixels/5}   reference page for a description
-%% of the acceptable values  for  `Type'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluBuild2DMipmaps.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluBuild2DMipmaps.xml">external</a> documentation.
 -spec build2DMipmaps(Target, InternalFormat, Width, Height, Format, Type, Data) -> integer() when Target :: enum(),InternalFormat :: integer(),Width :: integer(),Height :: integer(),Format :: enum(),Type :: enum(),Data :: binary().
 build2DMipmaps(Target,InternalFormat,Width,Height,Format,Type,Data) ->
   send_bin(Data),
@@ -246,32 +140,7 @@ build2DMipmaps(Target,InternalFormat,Width,Height,Format,Type,Data) ->
 %% maps of decreasing resolutions called a mipmap. This is used for the antialiasing of texture
 %% mapped primitives. 
 %%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  A series of mipmap levels from  `Base'  to  `Max'  is built by decimating  `Data' 
-%%  in half along both dimensions until size  1×1×1 is reached. At each level, each texel
-%% in the halved mipmap level is an average of the corresponding eight texels in the larger
-%% mipmap level. (If exactly one of the dimensions is 1, four texels are averaged. If exactly
-%% two of the dimensions are 1, two texels are averaged.)  {@link gl:texImage3D/10}  is called
-%% to load these mipmap levels from  `Base'  to  `Max' . If  `Max'  is larger than
-%% the highest mipmap level for the texture of the specified size, then a GLU error code
-%% is returned (see  {@link glu:errorString/1} ) and nothing is loaded. 
-%%
-%%  For example, if  `Level'  is 2 and  `Width'  is 16,  `Height'  is 8 and  `Depth' 
-%%  is 4, the following levels are possible:   16×8×4,   8×4×2,  4×2×1,   2×1×1,  1×1×1.
-%% These correspond to levels 2 through 6 respectively. If  `Base'  is 3 and  `Max' 
-%% is 5, then only mipmap levels   8×4×2,  4×2×1, and   2×1×1 are loaded. However, if  `Max' 
-%%  is 7, then an error is returned and nothing is loaded, since  `Max'  is larger than
-%% the highest mipmap level which is, in this case, 6. 
-%%
-%%  The highest mipmap level can be derived from the formula  log 2(max(width height depth)×2 level). 
-%%
-%%  See the  {@link gl:texImage1D/8}  reference page for a description of the acceptable values
-%% for  `Format'  parameter. See the  {@link gl:drawPixels/5}   reference page for a description
-%% of the acceptable values  for  `Type'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluBuild3DMipmapLevels.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluBuild3DMipmapLevels.xml">external</a> documentation.
 -spec build3DMipmapLevels(Target, InternalFormat, Width, Height, Depth, Format, Type, Level, Base, Max, Data) -> integer() when Target :: enum(),InternalFormat :: integer(),Width :: integer(),Height :: integer(),Depth :: integer(),Format :: enum(),Type :: enum(),Level :: integer(),Base :: integer(),Max :: integer(),Data :: binary().
 build3DMipmapLevels(Target,InternalFormat,Width,Height,Depth,Format,Type,Level,Base,Max,Data) ->
   send_bin(Data),
@@ -283,39 +152,7 @@ build3DMipmapLevels(Target,InternalFormat,Width,Height,Depth,Format,Type,Level,B
 %% of decreasing resolutions called a mipmap. This is used for the antialiasing of texture-mapped
 %% primitives. 
 %%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  Initially, the  `Width' ,  `Height'  and  `Depth'  of  `Data'  are checked
-%% to see if they are a power of 2. If not, a copy of  `Data'  is made and scaled up or
-%% down to the nearest power of 2. (If  `Width' ,  `Height' , or  `Depth'  is exactly
-%% between powers of 2, then the copy of  `Data'  will scale upwards.) This copy will
-%% be used for subsequent mipmapping operations described below. For example, if  `Width' 
-%% is 57,  `Height'  is 23, and  `Depth'  is 24, then a copy of  `Data'  will scale
-%% up to 64 in width, down to 16 in height, and up to 32 in depth before mipmapping takes
-%% place. 
-%%
-%%  Then, proxy textures (see  {@link gl:texImage3D/10} ) are used to determine if the implementation
-%% can fit the requested texture. If not, all three dimensions are continually halved until
-%% it fits.  
-%%
-%%  Next, a series of mipmap levels is built by decimating a copy of  `Data'  in half
-%% along all three dimensions until size   1×1×1 is reached. At each level, each texel in
-%% the halved mipmap level is an average of the corresponding eight texels in the larger
-%% mipmap level. (If exactly one of the dimensions is 1, four texels are averaged. If exactly
-%% two of the dimensions are 1, two texels are averaged.) 
-%%
-%%  {@link gl:texImage3D/10}  is called to load each of these mipmap levels. Level 0 is a copy
-%% of  `Data' . The highest level is (log 2)(max(width height depth)). For example, if  `Width'  is 64,  `Height' 
-%% is 16, and  `Depth'  is 32, and the implementation can store a texture of this size,
-%% the following mipmap levels are built:   64×16×32,  32×8×16,   16×4×8,  8×2×4,   4×1×2, 
-%% 2×1×1, and   1×1×1. These correspond to levels 0 through 6, respectively. 
-%%
-%%  See the  {@link gl:texImage1D/8}  reference page for a description of the acceptable values
-%% for  `Format'  parameter. See the  {@link gl:drawPixels/5}   reference page for a description
-%% of the acceptable values  for  `Type'  parameter. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluBuild3DMipmaps.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluBuild3DMipmaps.xml">external</a> documentation.
 -spec build3DMipmaps(Target, InternalFormat, Width, Height, Depth, Format, Type, Data) -> integer() when Target :: enum(),InternalFormat :: integer(),Width :: integer(),Height :: integer(),Depth :: integer(),Format :: enum(),Type :: enum(),Data :: binary().
 build3DMipmaps(Target,InternalFormat,Width,Height,Depth,Format,Type,Data) ->
   send_bin(Data),
@@ -326,12 +163,7 @@ build3DMipmaps(Target,InternalFormat,Width,Height,Depth,Format,Type,Data) ->
 %% ``glu:checkExtension'' returns `?GLU_TRUE' if  `ExtName'  is supported otherwise
 %%  `?GLU_FALSE' is returned. 
 %%
-%%  This is used to check for the presence for OpenGL, GLU, or GLX extension names by passing
-%% the extension strings returned by  {@link gl:getString/1} ,   {@link glu:getString/1} , see `glXGetClientString'
-%% , see `glXQueryExtensionsString', or see `glXQueryServerString', respectively,
-%% as  `ExtString' . 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluCheckExtension.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluCheckExtension.xml">external</a> documentation.
 -spec checkExtension(ExtName, ExtString) -> 0|1 when ExtName :: string(),ExtString :: string().
 checkExtension(ExtName,ExtString) ->
   ExtNameLen = length(ExtName),
@@ -345,19 +177,7 @@ checkExtension(ExtName,ExtString) ->
 %% is subdivided around the `z' axis into slices and along the  `z' axis into stacks.
 %% 
 %%
-%%  Note that if  `Top'  is set to 0.0, this routine generates a cone. 
-%%
-%%  If the orientation is set to `?GLU_OUTSIDE'  (with  {@link glu:quadricOrientation/2} ),
-%% then any generated normals point away from the `z' axis. Otherwise, they point toward
-%% the  `z' axis. 
-%%
-%%  If texturing is turned on (with  {@link glu:quadricTexture/2} ), then texture  coordinates
-%% are generated so that `t' ranges linearly from 0.0  at `z' = 0 to 1.0 at `z'
-%%  =  `Height' , and `s'  ranges from 0.0 at the +`y' axis, to 0.25 at the +`x'
-%%  axis,  to 0.5 at the -`y' axis, to 0.75 at the -`x' axis,  and back to 1.0
-%% at the +`y' axis. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluCylinder.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluCylinder.xml">external</a> documentation.
 -spec cylinder(Quad, Base, Top, Height, Slices, Stacks) -> 'ok' when Quad :: integer(),Base :: float(),Top :: float(),Height :: float(),Slices :: integer(),Stacks :: integer().
 cylinder(Quad,Base,Top,Height,Slices,Stacks) ->
   cast(5017, <<Quad:?GLUquadric,Base:?GLdouble,Top:?GLdouble,Height:?GLdouble,Slices:?GLint,Stacks:?GLint>>).
@@ -368,7 +188,7 @@ cylinder(Quad,Base,Top,Height,Slices,Stacks) ->
 %% and frees any memory it uses.  Once ``glu:deleteQuadric'' has been called,  `Quad' 
 %% cannot be used again. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluDeleteQuadric.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluDeleteQuadric.xml">external</a> documentation.
 -spec deleteQuadric(Quad) -> 'ok' when Quad :: integer().
 deleteQuadric(Quad) ->
   cast(5018, <<Quad:?GLUquadric>>).
@@ -381,17 +201,7 @@ deleteQuadric(Quad) ->
 %% slices (like pizza slices) and also about the `z' axis into rings  (as specified by  `Slices' 
 %%  and  `Loops' , respectively). 
 %%
-%%  With respect to orientation, the +`z' side of the disk is considered to be  ``outside''
-%% (see  {@link glu:quadricOrientation/2} ). This means that if the orientation is set to `?GLU_OUTSIDE'
-%% , then any normals generated  point along the +`z' axis. Otherwise, they point along
-%% the -`z'  axis. 
-%%
-%%  If texturing has been turned on (with  {@link glu:quadricTexture/2} ),  texture coordinates
-%% are generated linearly such that where   r=outer, the value at (`r', 0, 0) is  (1,
-%% 0.5), at (0, `r', 0) it is (0.5, 1), at (-`r', 0, 0)  it is (0, 0.5), and  at
-%% (0, -`r', 0) it is (0.5, 0). 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluDisk.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluDisk.xml">external</a> documentation.
 -spec disk(Quad, Inner, Outer, Slices, Loops) -> 'ok' when Quad :: integer(),Inner :: float(),Outer :: float(),Slices :: integer(),Loops :: integer().
 disk(Quad,Inner,Outer,Slices,Loops) ->
   cast(5019, <<Quad:?GLUquadric,Inner:?GLdouble,Outer:?GLdouble,Slices:?GLint,Loops:?GLint>>).
@@ -402,12 +212,7 @@ disk(Quad,Inner,Outer,Slices,Loops) ->
 %% is in ISO Latin 1 format. For example, ``glu:errorString''(`?GLU_OUT_OF_MEMORY')
 %% returns the string  `out of memory'. 
 %%
-%%  The standard GLU error codes are `?GLU_INVALID_ENUM',  `?GLU_INVALID_VALUE',
-%% and `?GLU_OUT_OF_MEMORY'. Certain other GLU functions can return specialized error
-%% codes through callbacks. See the  {@link gl:getError/0}  reference page for the list of 
-%% GL error codes. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluErrorString.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluErrorString.xml">external</a> documentation.
 -spec errorString(Error) -> string() when Error :: enum().
 errorString(Error) ->
   call(5020, <<Error:?GLenum>>).
@@ -417,25 +222,7 @@ errorString(Error) ->
 %% ``glu:getString'' returns a pointer to a static string describing the  GLU version or
 %% the GLU extensions that are supported. 
 %%
-%%  The version number is one of the following forms:  
-%%
-%% `major_number.minor_number'`major_number.minor_number.release_number'.  
-%%
-%%  The version string is of the following form:  
-%%
-%% `version number&lt;space&gt;vendor-specific information'
-%%
-%%  Vendor-specific information is optional. Its format and contents depend on the implementation.
-%% 
-%%
-%%  The standard GLU contains a basic set of features and capabilities. If a company or group
-%% of companies wish to support other features, these may be included as extensions to the
-%% GLU.  If  `Name'  is  `?GLU_EXTENSIONS', then ``glu:getString'' returns a space-separated
-%% list of names of supported GLU extensions. (Extension names never contain spaces.) 
-%%
-%%  All strings are null-terminated. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluGetString.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluGetString.xml">external</a> documentation.
 -spec getString(Name) -> string() when Name :: enum().
 getString(Name) ->
   call(5021, <<Name:?GLenum>>).
@@ -445,31 +232,7 @@ getString(Name) ->
 %% ``glu:lookAt'' creates a viewing matrix derived from an eye point, a reference point
 %% indicating the center of the scene, and an `UP' vector.  
 %%
-%%  The matrix maps the reference point to the negative `z' axis and the eye point to
-%% the origin. When a typical projection matrix is used, the center of the scene therefore
-%% maps to the center of the viewport. Similarly, the direction described by the `UP'
-%% vector projected onto the viewing plane is mapped to the positive `y'  axis so that
-%% it points upward in the viewport. The `UP' vector must not be parallel to the line
-%% of sight from the eye point to the reference point. 
-%%
-%%  Let  
-%%
-%%  F=(centerX-eyeX centerY-eyeY centerZ-eyeZ)
-%%
-%%  Let `UP' be the vector  (upX upY upZ).  
-%%
-%%  Then normalize as follows:   f=F/(||F||)
-%%
-%%  UP"=UP/(||UP||)
-%%
-%%  Finally, let   s=f×UP", and   u=s×f. 
-%%
-%%  M is then constructed as follows:  M=(s[0] s[1] s[2] 0 u[0] u[1] u[2] 0-f[0]-f[1]-f[2] 0 0 0 0 1)
-%%
-%%  and ``glu:lookAt'' is equivalent to   glMultMatrixf(M); glTranslated(-eyex, -eyey,
-%% -eyez); 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluLookAt.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluLookAt.xml">external</a> documentation.
 -spec lookAt(EyeX, EyeY, EyeZ, CenterX, CenterY, CenterZ, UpX, UpY, UpZ) -> 'ok' when EyeX :: float(),EyeY :: float(),EyeZ :: float(),CenterX :: float(),CenterY :: float(),CenterZ :: float(),UpX :: float(),UpY :: float(),UpZ :: float().
 lookAt(EyeX,EyeY,EyeZ,CenterX,CenterY,CenterZ,UpX,UpY,UpZ) ->
   cast(5022, <<EyeX:?GLdouble,EyeY:?GLdouble,EyeZ:?GLdouble,CenterX:?GLdouble,CenterY:?GLdouble,CenterZ:?GLdouble,UpX:?GLdouble,UpY:?GLdouble,UpZ:?GLdouble>>).
@@ -480,7 +243,7 @@ lookAt(EyeX,EyeY,EyeZ,CenterX,CenterY,CenterZ,UpX,UpY,UpZ) ->
 %% must be referred to when calling quadrics rendering and control functions. A return value
 %% of 0 means that there is not enough memory to allocate the object. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluNewQuadric.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluNewQuadric.xml">external</a> documentation.
 -spec newQuadric() -> integer().
 newQuadric() ->
   call(5023, <<>>).
@@ -490,7 +253,7 @@ newQuadric() ->
 %% ``glu:ortho2D'' sets up a two-dimensional orthographic viewing region.  This is equivalent
 %% to calling  {@link gl:ortho/6}  with   near=-1 and   far=1. 
 %%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluOrtho2D.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluOrtho2D.xml">external</a> documentation.
 -spec ortho2D(Left, Right, Bottom, Top) -> 'ok' when Left :: float(),Right :: float(),Bottom :: float(),Top :: float().
 ortho2D(Left,Right,Bottom,Top) ->
   cast(5024, <<Left:?GLdouble,Right:?GLdouble,Bottom:?GLdouble,Top:?GLdouble>>).
@@ -503,23 +266,7 @@ ortho2D(Left,Right,Bottom,Top) ->
 %% the +`x' axis, 180 degrees along the -`y' axis, and  270 degrees along the -`x'
 %%  axis). 
 %%
-%%  The partial disk has a radius of   `Outer'  and contains a concentric circular hole
-%% with a radius  of  `Inner' . If  `Inner'  is 0, then no hole is generated. The partial
-%% disk is subdivided around the `z' axis into slices (like pizza slices) and also about
-%% the `z' axis into rings  (as specified by  `Slices'  and  `Loops' , respectively).
-%% 
-%%
-%%  With respect to orientation, the +`z'  side of the partial disk is considered to
-%%  be outside (see  {@link glu:quadricOrientation/2} ). This means that if the  orientation
-%% is set to `?GLU_OUTSIDE', then any normals generated  point along the +`z' axis.
-%% Otherwise, they point along the -`z'  axis. 
-%%
-%%  If texturing is turned on (with  {@link glu:quadricTexture/2} ), texture coordinates are
-%% generated linearly such that where   r=outer, the value at (`r', 0, 0) is  (1.0,
-%% 0.5), at (0, `r', 0) it is (0.5, 1.0), at (-`r', 0, 0)  it is (0.0, 0.5), and
-%%  at (0, -`r', 0) it is (0.5, 0.0). 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluPartialDisk.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluPartialDisk.xml">external</a> documentation.
 -spec partialDisk(Quad, Inner, Outer, Slices, Loops, Start, Sweep) -> 'ok' when Quad :: integer(),Inner :: float(),Outer :: float(),Slices :: integer(),Loops :: integer(),Start :: float(),Sweep :: float().
 partialDisk(Quad,Inner,Outer,Slices,Loops,Start,Sweep) ->
   cast(5025, <<Quad:?GLUquadric,Inner:?GLdouble,Outer:?GLdouble,Slices:?GLint,Loops:?GLint,Start:?GLdouble,Sweep:?GLdouble>>).
@@ -532,18 +279,7 @@ partialDisk(Quad,Inner,Outer,Slices,Loops,Start,Sweep) ->
 %% as wide in `x' as it is in `y'. If the viewport is twice as wide as it is tall,
 %% it displays the image without distortion. 
 %%
-%%  The matrix generated by ``glu:perspective'' is multipled by the current matrix, just
-%% as if  {@link gl:multMatrixd/1}  were called with the generated matrix. To load the perspective
-%% matrix onto the current matrix stack instead, precede the call to ``glu:perspective''
-%% with a call to  {@link gl:loadIdentity/0} . 
-%%
-%%  Given `f' defined as follows: 
-%%
-%%  f=cotangent(fovy/2) The generated matrix is 
-%%
-%% (f/aspect 0 0 0 0 f 0 0 0 0(zFar+zNear)/(zNear-zFar)(2×zFar×zNear)/(zNear-zFar) 0 0 -1 0)
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluPerspective.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluPerspective.xml">external</a> documentation.
 -spec perspective(Fovy, Aspect, ZNear, ZFar) -> 'ok' when Fovy :: float(),Aspect :: float(),ZNear :: float(),ZFar :: float().
 perspective(Fovy,Aspect,ZNear,ZFar) ->
   cast(5026, <<Fovy:?GLdouble,Aspect:?GLdouble,ZNear:?GLdouble,ZFar:?GLdouble>>).
@@ -557,19 +293,7 @@ perspective(Fovy,Aspect,ZNear,ZFar) ->
 %% rerender the scene. All primitives that would have been drawn near the cursor are identified
 %% and stored in the selection buffer. 
 %%
-%%  The matrix created by ``glu:pickMatrix'' is multiplied by the current matrix just as
-%% if  {@link gl:multMatrixd/1}  is called with the generated matrix. To effectively use the
-%% generated pick matrix for picking, first call  {@link gl:loadIdentity/0}  to load an identity
-%% matrix onto the perspective matrix stack. Then call ``glu:pickMatrix'', and, finally,
-%% call a command (such as  {@link glu:perspective/4} ) to multiply the perspective matrix by
-%% the pick matrix. 
-%%
-%%  When using ``glu:pickMatrix'' to pick NURBS, be careful to turn off the NURBS  property
-%% `?GLU_AUTO_LOAD_MATRIX'. If `?GLU_AUTO_LOAD_MATRIX' is not turned off, then
-%% any NURBS surface rendered is subdivided differently with the pick matrix than the way
-%% it was subdivided without the pick matrix. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluPickMatrix.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluPickMatrix.xml">external</a> documentation.
 -spec pickMatrix(X, Y, DelX, DelY, Viewport) -> 'ok' when X :: float(),Y :: float(),DelX :: float(),DelY :: float(),Viewport :: {integer(),integer(),integer(),integer()}.
 pickMatrix(X,Y,DelX,DelY,{V1,V2,V3,V4}) ->
   cast(5027, <<X:?GLdouble,Y:?GLdouble,DelX:?GLdouble,DelY:?GLdouble,V1:?GLint,V2:?GLint,V3:?GLint,V4:?GLint>>).
@@ -581,25 +305,7 @@ pickMatrix(X,Y,DelX,DelY,{V1,V2,V3,V4}) ->
 %% , and  `WinZ' . A return value of  `?GLU_TRUE' indicates success, a return value
 %% of `?GLU_FALSE' indicates failure. 
 %%
-%%  To compute the coordinates, let   v=(objX objY objZ 1.0) represented as a matrix with 4 rows and 1 column.
-%% Then ``glu:project'' computes   v" as follows:  
-%%
-%%  v"=P×M×v
-%%
-%%  where   P is the current projection matrix  `Proj'  and   M is the current modelview
-%% matrix  `Model'  (both represented as  4×4 matrices in column-major order). 
-%%
-%%  The window coordinates are then computed as follows:  
-%%
-%%  winX=view(0)+view(2)×(v"(0)+1)/2
-%%
-%%  winY=view(1)+view(3)×(v"(1)+1)/2
-%%
-%%  winZ=(v"(2)+1)/2
-%%
-%% 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluProject.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluProject.xml">external</a> documentation.
 -spec project(ObjX, ObjY, ObjZ, Model, Proj, View) -> {integer(),WinX :: float(),WinY :: float(),WinZ :: float()} when ObjX :: float(),ObjY :: float(),ObjZ :: float(),Model :: matrix(),Proj :: matrix(),View :: {integer(),integer(),integer(),integer()}.
 project(ObjX,ObjY,ObjZ,{M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16},{P1,P2,P3,P4,P5,P6,P7,P8,P9,P10,P11,P12,P13,P14,P15,P16},{V1,V2,V3,V4}) ->
   call(5028, <<ObjX:?GLdouble,ObjY:?GLdouble,ObjZ:?GLdouble,M1:?GLdouble,M2:?GLdouble,M3:?GLdouble,M4:?GLdouble,M5:?GLdouble,M6:?GLdouble,M7:?GLdouble,M8:?GLdouble,M9:?GLdouble,M10:?GLdouble,M11:?GLdouble,M12:?GLdouble,M13:?GLdouble,M14:?GLdouble,M15:?GLdouble,M16:?GLdouble,P1:?GLdouble,P2:?GLdouble,P3:?GLdouble,P4:?GLdouble,P5:?GLdouble,P6:?GLdouble,P7:?GLdouble,P8:?GLdouble,P9:?GLdouble,P10:?GLdouble,P11:?GLdouble,P12:?GLdouble,P13:?GLdouble,P14:?GLdouble,P15:?GLdouble,P16:?GLdouble,V1:?GLint,V2:?GLint,V3:?GLint,V4:?GLint>>);
@@ -611,18 +317,7 @@ project(ObjX,ObjY,ObjZ,{M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12},{P1,P2,P3,P4,P5,
 %% ``glu:quadricDrawStyle'' specifies the draw style for quadrics rendered with  `Quad' .
 %% The legal values are as follows: 
 %%
-%% `?GLU_FILL':  Quadrics are rendered with polygon primitives. The polygons  are drawn
-%% in a counterclockwise fashion with respect to their normals (as defined with  {@link glu:quadricOrientation/2} 
-%% ). 
-%%
-%% `?GLU_LINE':  Quadrics are rendered as a set of lines. 
-%%
-%% `?GLU_SILHOUETTE':  Quadrics are rendered as a set of lines, except that edges separating
-%% coplanar faces will not be drawn. 
-%%
-%% `?GLU_POINT':  Quadrics are rendered as a set of points. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluQuadricDrawStyle.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluQuadricDrawStyle.xml">external</a> documentation.
 -spec quadricDrawStyle(Quad, Draw) -> 'ok' when Quad :: integer(),Draw :: enum().
 quadricDrawStyle(Quad,Draw) ->
   cast(5029, <<Quad:?GLUquadric,Draw:?GLenum>>).
@@ -632,14 +327,7 @@ quadricDrawStyle(Quad,Draw) ->
 %% ``glu:quadricNormals'' specifies what kind of normals are desired for quadrics rendered
 %% with  `Quad' . The legal values are as follows: 
 %%
-%% `?GLU_NONE':  No normals are generated. 
-%%
-%% `?GLU_FLAT':  One normal is generated for every facet of a quadric. 
-%%
-%% `?GLU_SMOOTH':  One normal is generated for every vertex of a quadric. This is the
-%% initial value. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluQuadricNormals.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluQuadricNormals.xml">external</a> documentation.
 -spec quadricNormals(Quad, Normal) -> 'ok' when Quad :: integer(),Normal :: enum().
 quadricNormals(Quad,Normal) ->
   cast(5030, <<Quad:?GLUquadric,Normal:?GLenum>>).
@@ -649,15 +337,7 @@ quadricNormals(Quad,Normal) ->
 %% ``glu:quadricOrientation'' specifies what kind of orientation is desired for quadrics
 %% rendered  with  `Quad' . The  `Orientation'  values are as follows: 
 %%
-%% `?GLU_OUTSIDE':  Quadrics are drawn with normals pointing outward (the initial value).
-%% 
-%%
-%% `?GLU_INSIDE':  Quadrics are drawn with normals pointing inward. 
-%%
-%%  Note that the interpretation of `outward' and `inward' depends on the quadric
-%% being drawn. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluQuadricOrientation.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluQuadricOrientation.xml">external</a> documentation.
 -spec quadricOrientation(Quad, Orientation) -> 'ok' when Quad :: integer(),Orientation :: enum().
 quadricOrientation(Quad,Orientation) ->
   cast(5031, <<Quad:?GLUquadric,Orientation:?GLenum>>).
@@ -669,10 +349,7 @@ quadricOrientation(Quad,Orientation) ->
 %% coordinates  are generated, and if  `Texture'  is `?GLU_FALSE', they are not.
 %% The initial value is `?GLU_FALSE'. 
 %%
-%%  The manner in which texture coordinates are generated depends  upon the specific quadric
-%% rendered. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluQuadricTexture.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluQuadricTexture.xml">external</a> documentation.
 -spec quadricTexture(Quad, Texture) -> 'ok' when Quad :: integer(),Texture :: 0|1.
 quadricTexture(Quad,Texture) ->
   cast(5032, <<Quad:?GLUquadric,Texture:?GLboolean>>).
@@ -682,17 +359,7 @@ quadricTexture(Quad,Texture) ->
 %% ``glu:scaleImage'' scales a pixel image using the appropriate pixel store modes to 
 %% unpack data from the source image and pack data into the destination image. 
 %%
-%%  When shrinking an image, ``glu:scaleImage'' uses a box filter to sample the source
-%% image and create pixels for the destination image. When magnifying an image, the pixels
-%% from the source image are linearly interpolated to create the destination image. 
-%%
-%%  A return value of zero indicates success, otherwise a GLU error code is returned (see  {@link glu:errorString/1} 
-%% ). 
-%%
-%%  See the  {@link gl:readPixels/7}  reference page for a description of the acceptable values
-%% for the  `Format' ,  `TypeIn' , and  `TypeOut'  parameters. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluScaleImage.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluScaleImage.xml">external</a> documentation.
 -spec scaleImage(Format, WIn, HIn, TypeIn, DataIn, WOut, HOut, TypeOut, DataOut) -> integer() when Format :: enum(),WIn :: integer(),HIn :: integer(),TypeIn :: enum(),DataIn :: binary(),WOut :: integer(),HOut :: integer(),TypeOut :: enum(),DataOut :: mem().
 scaleImage(Format,WIn,HIn,TypeIn,DataIn,WOut,HOut,TypeOut,DataOut) ->
   send_bin(DataIn),
@@ -705,17 +372,7 @@ scaleImage(Format,WIn,HIn,TypeIn,DataIn,WOut,HOut,TypeOut,DataOut) ->
 %% is subdivided around the `z' axis into slices and along the  `z' axis  into
 %% stacks (similar to lines of longitude and latitude). 
 %%
-%%  If the orientation is set to `?GLU_OUTSIDE'  (with  {@link glu:quadricOrientation/2} ),
-%% then any normals generated  point away from the center of the sphere. Otherwise, they
-%% point toward the center of the sphere. 
-%%
-%%  If texturing is turned on (with  {@link glu:quadricTexture/2} ), then texture  coordinates
-%% are  generated so that `t' ranges from 0.0 at   z=-radius to 1.0 at   z=radius (`t'
-%%  increases linearly along longitudinal lines), and `s' ranges from 0.0 at the +`y'
-%%  axis, to 0.25 at the  +`x' axis,  to 0.5 at the -`y' axis, to 0.75 at the -`x'
-%%  axis, and back to 1.0  at the +`y' axis. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluSphere.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluSphere.xml">external</a> documentation.
 -spec sphere(Quad, Radius, Slices, Stacks) -> 'ok' when Quad :: integer(),Radius :: float(),Slices :: integer(),Stacks :: integer().
 sphere(Quad,Radius,Slices,Stacks) ->
   cast(5034, <<Quad:?GLUquadric,Radius:?GLdouble,Slices:?GLint,Stacks:?GLint>>).
@@ -727,13 +384,7 @@ sphere(Quad,Radius,Slices,Stacks) ->
 %% . A return value of  `?GLU_TRUE' indicates success; a return value of `?GLU_FALSE'
 %%  indicates failure. 
 %%
-%%  To compute the coordinates  (objX objY objZ), ``glu:unProject'' multiplies the normalized device coordinates
-%% by the inverse of  `Model'  *  `Proj'  as follows: 
-%%
-%% (objX objY objZ W)=INV(P  M) ((2(winX-view[0]))/(view[2])-1(2(winY-view[1]))/(view[3])-1 2(winZ)-1 1) INV denotes matrix inversion.  W is an unused variable, included for consistent
-%% matrix notation. 
-%%
-%% See <a href="http://www.opengl.org/sdk/docs/man/xhtml/gluUnProject.xml">external</a> documentation.
+%% See <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluUnProject.xml">external</a> documentation.
 -spec unProject(WinX, WinY, WinZ, Model, Proj, View) -> {integer(),ObjX :: float(),ObjY :: float(),ObjZ :: float()} when WinX :: float(),WinY :: float(),WinZ :: float(),Model :: matrix(),Proj :: matrix(),View :: {integer(),integer(),integer(),integer()}.
 unProject(WinX,WinY,WinZ,{M1,M2,M3,M4,M5,M6,M7,M8,M9,M10,M11,M12,M13,M14,M15,M16},{P1,P2,P3,P4,P5,P6,P7,P8,P9,P10,P11,P12,P13,P14,P15,P16},{V1,V2,V3,V4}) ->
   call(5035, <<WinX:?GLdouble,WinY:?GLdouble,WinZ:?GLdouble,M1:?GLdouble,M2:?GLdouble,M3:?GLdouble,M4:?GLdouble,M5:?GLdouble,M6:?GLdouble,M7:?GLdouble,M8:?GLdouble,M9:?GLdouble,M10:?GLdouble,M11:?GLdouble,M12:?GLdouble,M13:?GLdouble,M14:?GLdouble,M15:?GLdouble,M16:?GLdouble,P1:?GLdouble,P2:?GLdouble,P3:?GLdouble,P4:?GLdouble,P5:?GLdouble,P6:?GLdouble,P7:?GLdouble,P8:?GLdouble,P9:?GLdouble,P10:?GLdouble,P11:?GLdouble,P12:?GLdouble,P13:?GLdouble,P14:?GLdouble,P15:?GLdouble,P16:?GLdouble,V1:?GLint,V2:?GLint,V3:?GLint,V4:?GLint>>);