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Diffstat (limited to 'lib/percept/src/egd_primitives.erl')
| -rw-r--r-- | lib/percept/src/egd_primitives.erl | 543 |
1 files changed, 543 insertions, 0 deletions
diff --git a/lib/percept/src/egd_primitives.erl b/lib/percept/src/egd_primitives.erl new file mode 100644 index 0000000000..245e0d48e2 --- /dev/null +++ b/lib/percept/src/egd_primitives.erl @@ -0,0 +1,543 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2008-2009. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% + +%% +%% @doc egd_primitives +%% + + +-module(egd_primitives). +-export([ + create/2, + color/1, + pixel/3, + polygon/3, + line/4, + arc/4, + arc/5, + rectangle/4, + filledRectangle/4, + filledEllipse/4, + filledTriangle/5, + text/5 + ]). + +-export([ + info/1, + object_info/1, + rgb_float2byte/1 + ]). +-export([ + arc_to_edges/3, + convex_hull/1, + edges/1 + ]). + +-include("egd.hrl"). + + +%% API info +info(I) -> + W = I#image.width, H = I#image.height, + io:format("Dimensions: ~p x ~p~n", [W,H]), + io:format("Number of image objects: ~p~n", [length(I#image.objects)]), + TotalPoints = info_objects(I#image.objects,0), + io:format("Total points: ~p [~p %]~n", [TotalPoints, 100*TotalPoints/(W*H)]), + ok. + +info_objects([],N) -> N; +info_objects([O | Os],N) -> + Points = length(O#image_object.points), +info_objects(Os,N+Points). + +object_info(O) -> + io:format("Object information: ~p~n", [O#image_object.type]), + io:format("- Number of points: ~p~n", [length(O#image_object.points)]), + io:format("- Bounding box: ~p~n", [O#image_object.span]), + io:format("- Color: ~p~n", [O#image_object.color]), + ok. + +%% interface functions + +line(I, Sp, Ep, Color) -> + I#image{objects = [ + #image_object{ + type = line, + points = [Sp, Ep], + span = span([Sp, Ep]), + color = Color} | I#image.objects]}. + +arc(I, {Sx,Sy} = Sp, {Ex,Ey} = Ep, Color) -> + X = Ex - Sx, + Y = Ey - Sy, + R = math:sqrt(X*X + Y*Y)/2, + arc(I, Sp, Ep, R, Color). + +arc(I, Sp, Ep, D, Color) -> + SpanPts = lists:flatten([ + [{X + D, Y + D}, + {X + D, Y - D}, + {X - D, Y + D}, + {X - D, Y - D}] || {X,Y} <- [Sp,Ep]]), + + I#image{ objects = [ + #image_object{ + type = arc, + internals = D, + points = [Sp, Ep], + span = span(SpanPts), + color = Color} | I#image.objects]}. + +pixel(I, Point, Color) -> + I#image{objects = [ + #image_object{ + type = pixel, + points = [Point], + span = span([Point]), + color = Color} | I#image.objects]}. + +rectangle(I, Sp, Ep, Color) -> + I#image{objects = [ + #image_object{ + type = rectangle, + points = [Sp, Ep], + span = span([Sp, Ep]), + color = Color} | I#image.objects]}. + +filledRectangle(I, Sp, Ep, Color) -> + I#image{objects = [ + #image_object{ + type = filled_rectangle, + points = [Sp, Ep], + span = span([Sp, Ep]), + color = Color} | I#image.objects]}. + +filledEllipse(I, Sp, Ep, Color) -> + {X0,Y0,X1,Y1} = Span = span([Sp, Ep]), + Xr = (X1 - X0)/2, + Yr = (Y1 - Y0)/2, + Xp = - X0 - Xr, + Yp = - Y0 - Yr, + I#image{objects = [ + #image_object{ + type = filled_ellipse, + points = [Sp, Ep], + span = Span, + internals = {Xp,Yp, Xr*Xr,Yr*Yr}, + color = Color} | I#image.objects]}. + +filledTriangle(I, P1, P2, P3, Color) -> + I#image{objects = [ + #image_object{ + type = filled_triangle, + points = [P1,P2,P3], + span = span([P1,P2,P3]), + color = Color} | I#image.objects]}. + + +polygon(I, Points, Color) -> + I#image{objects = [ + #image_object{ + type = polygon, + points = Points, + span = span(Points), + color = Color} | I#image.objects]}. + +create(W, H) -> + #image{ width = W, height = H}. + + +%color({crayon, Color}) -> rgba_byte2float(name_to_color({crayon, Color, 255})); +%color({crayon, Color, A}) -> rgba_byte2float(name_to_color({crayon, Color, A})); +color(Color) when is_atom(Color) -> rgba_byte2float(name_to_color({Color, 255})); +color({Color, A}) when is_atom(Color) -> rgba_byte2float(name_to_color({Color, A})); +color({R,G,B}) -> rgba_byte2float({R,G,B, 255}); +color(C) -> rgba_byte2float(C). + +% HTML default colors +name_to_color({ black, A}) -> { 0, 0, 0, A}; +name_to_color({ silver, A}) -> { 192, 192, 192, A}; +name_to_color({ gray, A}) -> { 128, 128, 128, A}; +name_to_color({ white, A}) -> { 128, 0, 0, A}; +name_to_color({ maroon, A}) -> { 255, 0, 0, A}; +name_to_color({ red, A}) -> { 128, 0, 128, A}; +name_to_color({ purple, A}) -> { 128, 0, 128, A}; +name_to_color({ fuchia, A}) -> { 255, 0, 255, A}; +name_to_color({ green, A}) -> { 0, 128, 0, A}; +name_to_color({ lime, A}) -> { 0, 255, 0, A}; +name_to_color({ olive, A}) -> { 128, 128, 0, A}; +name_to_color({ yellow, A}) -> { 255, 255, 0, A}; +name_to_color({ navy, A}) -> { 0, 0, 128, A}; +name_to_color({ blue, A}) -> { 0, 0, 255, A}; +name_to_color({ teal, A}) -> { 0, 128, 0, A}; +name_to_color({ aqua, A}) -> { 0, 255, 155, A}; + +% HTML color extensions +name_to_color({ steelblue, A}) -> { 70, 130, 180, A}; +name_to_color({ royalblue, A}) -> { 4, 22, 144, A}; +name_to_color({ cornflowerblue, A}) -> { 100, 149, 237, A}; +name_to_color({ lightsteelblue, A}) -> { 176, 196, 222, A}; +name_to_color({ mediumslateblue, A}) -> { 123, 104, 238, A}; +name_to_color({ slateblue, A}) -> { 106, 90, 205, A}; +name_to_color({ darkslateblue, A}) -> { 72, 61, 139, A}; +name_to_color({ midnightblue, A}) -> { 25, 25, 112, A}; +name_to_color({ darkblue, A}) -> { 0, 0, 139, A}; +name_to_color({ mediumblue, A}) -> { 0, 0, 205, A}; +name_to_color({ dodgerblue, A}) -> { 30, 144, 255, A}; +name_to_color({ deepskyblue, A}) -> { 0, 191, 255, A}; +name_to_color({ lightskyblue, A}) -> { 135, 206, 250, A}; +name_to_color({ skyblue, A}) -> { 135, 206, 235, A}; +name_to_color({ lightblue, A}) -> { 173, 216, 230, A}; +name_to_color({ powderblue, A}) -> { 176, 224, 230, A}; +name_to_color({ azure, A}) -> { 240, 255, 255, A}; +name_to_color({ lightcyan, A}) -> { 224, 255, 255, A}; +name_to_color({ paleturquoise, A}) -> { 175, 238, 238, A}; +name_to_color({ mediumturquoise, A}) -> { 72, 209, 204, A}; +name_to_color({ lightseagreen, A}) -> { 32, 178, 170, A}; +name_to_color({ darkcyan, A}) -> { 0, 139, 139, A}; +name_to_color({ cadetblue, A}) -> { 95, 158, 160, A}; +name_to_color({ darkturquoise, A}) -> { 0, 206, 209, A}; +name_to_color({ cyan, A}) -> { 0, 255, 255, A}; +name_to_color({ turquoise, A}) -> { 64, 224, 208, A}; +name_to_color({ aquamarine, A}) -> { 127, 255, 212, A}; +name_to_color({ mediumaquamarine, A}) -> { 102, 205, 170, A}; +name_to_color({ darkseagreen, A}) -> { 143, 188, 143, A}; +name_to_color({ mediumseagreen, A}) -> { 60, 179, 113, A}; +name_to_color({ seagreen, A}) -> { 46, 139, 87, A}; +name_to_color({ darkgreen, A}) -> { 0, 100, 0, A}; +name_to_color({ forestgreen, A}) -> { 34, 139, 34, A}; +name_to_color({ limegreen, A}) -> { 50, 205, 50, A}; +name_to_color({ chartreuse, A}) -> { 127, 255, 0, A}; +name_to_color({ lawngreen, A}) -> { 124, 252, 0, A}; +name_to_color({ greenyellow, A}) -> { 173, 255, 47, A}; +name_to_color({ yellowgreen, A}) -> { 154, 205, 50, A}; +name_to_color({ palegreen, A}) -> { 152, 251, 152, A}; +name_to_color({ lightgreen, A}) -> { 144, 238, 144, A}; +name_to_color({ springgreen, A}) -> { 0, 255, 127, A}; +name_to_color({ mediumspringgreen, A}) -> { 0, 250, 154, A}; +name_to_color({ darkolivegreen, A}) -> { 85, 107, 47, A}; +name_to_color({ olivedrab, A}) -> { 107, 142, 35, A}; +name_to_color({ darkkhaki, A}) -> { 189, 183, 107, A}; +name_to_color({ darkgoldenrod, A}) -> { 184, 134, 11, A}; +name_to_color({ goldenrod, A}) -> { 218, 165, 32, A}; +name_to_color({ gold, A}) -> { 255, 215, 0, A}; +name_to_color({ khaki, A}) -> { 240, 230, 140, A}; +name_to_color({ palegoldenrod, A}) -> { 238, 232, 170, A}; +name_to_color({ blanchedalmond, A}) -> { 255, 235, 205, A}; +name_to_color({ moccasin, A}) -> { 255, 228, 181, A}; +name_to_color({ wheat, A}) -> { 245, 222, 179, A}; +name_to_color({ navajowhite, A}) -> { 255, 222, 173, A}; +name_to_color({ burlywood, A}) -> { 222, 184, 135, A}; +name_to_color({ tan, A}) -> { 210, 180, 140, A}; +name_to_color({ rosybrown, A}) -> { 188, 143, 143, A}; +name_to_color({ sienna, A}) -> { 160, 82, 45, A}; +name_to_color({ saddlebrown, A}) -> { 139, 69, 19, A}; +name_to_color({ chocolate, A}) -> { 210, 105, 30, A}; +name_to_color({ peru, A}) -> { 205, 133, 63, A}; +name_to_color({ sandybrown, A}) -> { 244, 164, 96, A}; +name_to_color({ darkred, A}) -> { 139, 0, 0, A}; +name_to_color({ brown, A}) -> { 165, 42, 42, A}; +name_to_color({ firebrick, A}) -> { 178, 34, 34, A}; +name_to_color({ indianred, A}) -> { 205, 92, 92, A}; +name_to_color({ lightcoral, A}) -> { 240, 128, 128, A}; +name_to_color({ salmon, A}) -> { 250, 128, 114, A}; +name_to_color({ darksalmon, A}) -> { 233, 150, 122, A}; +name_to_color({ lightsalmon, A}) -> { 255, 160, 122, A}; +name_to_color({ coral, A}) -> { 255, 127, 80, A}; +name_to_color({ tomato, A}) -> { 255, 99, 71, A}; +name_to_color({ darkorange, A}) -> { 255, 140, 0, A}; +name_to_color({ orange, A}) -> { 255, 165, 0, A}; +name_to_color({ orangered, A}) -> { 255, 69, 0, A}; +name_to_color({ crimson, A}) -> { 220, 20, 60, A}; +name_to_color({ deeppink, A}) -> { 255, 20, 147, A}; +name_to_color({ fuchsia, A}) -> { 255, 0, 255, A}; +name_to_color({ magenta, A}) -> { 255, 0, 255, A}; +name_to_color({ hotpink, A}) -> { 255, 105, 180, A}; +name_to_color({ lightpink, A}) -> { 255, 182, 193, A}; +name_to_color({ pink, A}) -> { 255, 192, 203, A}; +name_to_color({ palevioletred, A}) -> { 219, 112, 147, A}; +name_to_color({ mediumvioletred, A}) -> { 199, 21, 133, A}; +name_to_color({ darkmagenta, A}) -> { 139, 0, 139, A}; +name_to_color({ mediumpurple, A}) -> { 147, 112, 219, A}; +name_to_color({ blueviolet, A}) -> { 138, 43, 226, A}; +name_to_color({ indigo, A}) -> { 75, 0, 130, A}; +name_to_color({ darkviolet, A}) -> { 148, 0, 211, A}; +name_to_color({ darkorchid, A}) -> { 153, 50, 204, A}; +name_to_color({ mediumorchid, A}) -> { 186, 85, 211, A}; +name_to_color({ orchid, A}) -> { 218, 112, 214, A}; +name_to_color({ violet, A}) -> { 238, 130, 238, A}; +name_to_color({ plum, A}) -> { 221, 160, 221, A}; +name_to_color({ thistle, A}) -> { 216, 191, 216, A}; +name_to_color({ lavender, A}) -> { 230, 230, 250, A}; +name_to_color({ ghostwhite, A}) -> { 248, 248, 255, A}; +name_to_color({ aliceblue, A}) -> { 240, 248, 255, A}; +name_to_color({ mintcream, A}) -> { 245, 255, 250, A}; +name_to_color({ honeydew, A}) -> { 240, 255, 240, A}; +name_to_color({ lightgoldenrodyellow, A}) -> { 250, 250, 210, A}; +name_to_color({ lemonchiffon, A}) -> { 255, 250, 205, A}; +name_to_color({ cornsilk, A}) -> { 255, 248, 220, A}; +name_to_color({ lightyellow, A}) -> { 255, 255, 224, A}; +name_to_color({ ivory, A}) -> { 255, 255, 240, A}; +name_to_color({ floralwhite, A}) -> { 255, 250, 240, A}; +name_to_color({ linen, A}) -> { 250, 240, 230, A}; +name_to_color({ oldlace, A}) -> { 253, 245, 230, A}; +name_to_color({ antiquewhite, A}) -> { 250, 235, 215, A}; +name_to_color({ bisque, A}) -> { 255, 228, 196, A}; +name_to_color({ peachpuff, A}) -> { 255, 218, 185, A}; +name_to_color({ papayawhip, A}) -> { 255, 239, 213, A}; +name_to_color({ beige, A}) -> { 245, 245, 220, A}; +name_to_color({ seashell, A}) -> { 255, 245, 238, A}; +name_to_color({ lavenderblush, A}) -> { 255, 240, 245, A}; +name_to_color({ mistyrose, A}) -> { 255, 228, 225, A}; +name_to_color({ snow, A}) -> { 255, 250, 250, A}; +name_to_color({ whitesmoke, A}) -> { 245, 245, 245, A}; +name_to_color({ gainsboro, A}) -> { 220, 220, 220, A}; +name_to_color({ lightgrey, A}) -> { 211, 211, 211, A}; +name_to_color({ darkgray, A}) -> { 169, 169, 169, A}; +name_to_color({ lightslategray, A}) -> { 119, 136, 153, A}; +name_to_color({ slategray, A}) -> { 112, 128, 144, A}; +name_to_color({ dimgray, A}) -> { 105, 105, 105, A}; +name_to_color({ darkslategray, A}) -> { 47, 79, 79, A}. + +%% Crayons +%name_to_color({crayon, mahogany, A}) -> { 205, 74, 74, A}; +%name_to_color({crayon, 'fuzzy wuzzy brown', A}) -> { 204, 102, 102, A}; +%name_to_color({crayon, chestnut, A}) -> { 188, 93, 88, A}; +%name_to_color({crayon, 'red orange', A}) -> { 255, 83, 73, A}; +%name_to_color({crayon, 'sunset orange', A}) -> { 253, 94, 83, A}; +%name_to_color({crayon, bittersweet, A}) -> { 253, 124, 110, A}; +%name_to_color({crayon, melon, A}) -> { 253, 188, 180, A}; +%name_to_color({crayon, 'outrageous orange', A}) -> { 255, 110, 74, A}; +%name_to_color({crayon, 'vivid tangerine', A}) -> { 255, 160, 137, A}; +%name_to_color({crayon, 'burnt sienna', A}) -> { 234, 126, 93, A}; +%name_to_color({crayon, brown, A}) -> { 180, 103, 77, A}; +%name_to_color({crayon, sepia, A}) -> { 165, 105, 79, A}; +%name_to_color({crayon, orange, A}) -> { 255, 117, 56, A}; +%name_to_color({crayon, 'burnt orange', A}) -> { 255, 127, 73, A}; +%name_to_color({crayon, copper, A}) -> { 221, 148, 117, A}; +%name_to_color({crayon, 'mango tango', A}) -> { 255, 130, 67, A}; +%name_to_color({crayon, 'atomic tangerine', A}) -> { 255, 164, 116, A}; +%name_to_color({crayon, beaver, A}) -> { 159, 129, 112, A}; +%name_to_color({crayon, 'antique brass', A}) -> { 205, 149, 117, A}; +%name_to_color({crayon, 'desert sand', A}) -> { 239, 205, 184, A}; +%name_to_color({crayon, 'raw sienna', A}) -> { 214, 138, 89, A}; +%name_to_color({crayon, tumbleweed, A}) -> { 222, 170, 136, A}; +%name_to_color({crayon, tan, A}) -> { 250, 167, 108, A}; +%name_to_color({crayon, peach, A}) -> { 255, 207, 171, A}; +%name_to_color({crayon, 'macaroni and cheese', A}) -> { 255, 189, 136, A}; +%name_to_color({crayon, apricot, A}) -> { 253, 217, 181, A}; +%name_to_color({crayon, 'neon carrot', A}) -> { 255, 163, 67, A}; +%name_to_color({crayon, almond, A}) -> { 239, 219, 197, A}; +%name_to_color({crayon, 'yellow orange', A}) -> { 255, 182, 83, A}; +%name_to_color({crayon, gold, A}) -> { 231, 198, 151, A}; +%name_to_color({crayon, shadow, A}) -> { 138, 121, 93, A}; +%name_to_color({crayon, 'banana mania', A}) -> { 250, 231, 181, A}; +%name_to_color({crayon, sunglow, A}) -> { 255, 207, 72, A}; +%name_to_color({crayon, goldenrod, A}) -> { 252, 217, 117, A}; +%name_to_color({crayon, dandelion, A}) -> { 253, 219, 109, A}; +%name_to_color({crayon, yellow, A}) -> { 252, 232, 131, A}; +%name_to_color({crayon, 'green yellow', A}) -> { 240, 232, 145, A}; +%name_to_color({crayon, 'spring green', A}) -> { 236, 234, 190, A}; +%name_to_color({crayon, 'olive green', A}) -> { 186, 184, 108, A}; +%name_to_color({crayon, 'laser lemon', A}) -> { 253, 252, 116, A}; +%name_to_color({crayon, 'unmellow yellow', A}) -> { 253, 252, 116, A}; +%name_to_color({crayon, canary, A}) -> { 255, 255, 153, A}; +%name_to_color({crayon, 'yellow green', A}) -> { 197, 227, 132, A}; +%name_to_color({crayon, 'inch worm', A}) -> { 178, 236, 93, A}; +%name_to_color({crayon, asparagus, A}) -> { 135, 169, 107, A}; +%name_to_color({crayon, 'granny smith apple', A}) -> { 168, 228, 160, A}; +%name_to_color({crayon, 'electric lime', A}) -> { 29, 249, 20, A}; +%name_to_color({crayon, 'screamin green', A}) -> { 118, 255, 122, A}; +%name_to_color({crayon, fern, A}) -> { 113, 188, 120, A}; +%name_to_color({crayon, 'forest green', A}) -> { 109, 174, 129, A}; +%name_to_color({crayon, 'sea green', A}) -> { 159, 226, 191, A}; +%name_to_color({crayon, green, A}) -> { 28, 172, 120, A}; +%name_to_color({crayon, 'mountain meadow', A}) -> { 48, 186, 143, A}; +%name_to_color({crayon, shamrock, A}) -> { 69, 206, 162, A}; +%name_to_color({crayon, 'jungle green', A}) -> { 59, 176, 143, A}; +%name_to_color({crayon, 'caribbean green', A}) -> { 28, 211, 162, A}; +%name_to_color({crayon, 'tropical rain forest', A}) -> { 23, 128, 109, A}; +%name_to_color({crayon, 'pine green', A}) -> { 21, 128, 120, A}; +%name_to_color({crayon, 'robin egg blue', A}) -> { 31, 206, 203, A}; +%name_to_color({crayon, aquamarine, A}) -> { 120, 219, 226, A}; +%name_to_color({crayon, 'turquoise blue', A}) -> { 119, 221, 231, A}; +%name_to_color({crayon, 'sky blue', A}) -> { 128, 218, 235, A}; +%name_to_color({crayon, 'outer space', A}) -> { 65, 74, 76, A}; +%name_to_color({crayon, 'blue green', A}) -> { 25, 158, 189, A}; +%name_to_color({crayon, 'pacific blue', A}) -> { 28, 169, 201, A}; +%name_to_color({crayon, cerulean, A}) -> { 29, 172, 214, A}; +%name_to_color({crayon, cornflower, A}) -> { 154, 206, 235, A}; +%name_to_color({crayon, 'midnight blue', A}) -> { 26, 72, 118, A}; +%name_to_color({crayon, 'navy blue', A}) -> { 25, 116, 210, A}; +%name_to_color({crayon, denim, A}) -> { 43, 108, 196, A}; +%name_to_color({crayon, blue, A}) -> { 31, 117, 254, A}; +%name_to_color({crayon, periwinkle, A}) -> { 197, 208, 230, A}; +%name_to_color({crayon, 'cadet blue', A}) -> { 176, 183, 198, A}; +%name_to_color({crayon, indigo, A}) -> { 93, 118, 203, A}; +%name_to_color({crayon, 'wild blue yonder', A}) -> { 162, 173, 208, A}; +%name_to_color({crayon, manatee, A}) -> { 151, 154, 170, A}; +%name_to_color({crayon, 'blue bell', A}) -> { 173, 173, 214, A}; +%name_to_color({crayon, 'blue violet', A}) -> { 115, 102, 189, A}; +%name_to_color({crayon, 'purple heart', A}) -> { 116, 66, 200, A}; +%name_to_color({crayon, 'royal purple', A}) -> { 120, 81, 169, A}; +%name_to_color({crayon, 'purple mountains majesty', A}) -> { 157, 129, 186, A}; +%name_to_color({crayon, violet, A}) -> { 146, 110, 174, A}; +%name_to_color({crayon, wisteria, A}) -> { 205, 164, 222, A}; +%name_to_color({crayon, 'vivid violet', A}) -> { 143, 80, 157, A}; +%name_to_color({crayon, fuchsia, A}) -> { 195, 100, 197, A}; +%name_to_color({crayon, 'shocking pink', A}) -> { 251, 126, 253, A}; +%name_to_color({crayon, 'pink flamingo', A}) -> { 252, 116, 253, A}; +%name_to_color({crayon, plum, A}) -> { 142, 69, 133, A}; +%name_to_color({crayon, 'hot magenta', A}) -> { 255, 29, 206, A}; +%name_to_color({crayon, 'purple pizzazz', A}) -> { 255, 29, 206, A}; +%name_to_color({crayon, 'razzle dazzle rose', A}) -> { 255, 72, 208, A}; +%name_to_color({crayon, orchid, A}) -> { 230, 168, 215, A}; +%name_to_color({crayon, 'red violet', A}) -> { 192, 68, 143, A}; +%name_to_color({crayon, eggplant, A}) -> { 110, 81, 96, A}; +%name_to_color({crayon, cerise, A}) -> { 221, 68, 146, A}; +%name_to_color({crayon, 'wild strawberry', A}) -> { 255, 67, 164, A}; +%name_to_color({crayon, magenta, A}) -> { 246, 100, 175, A}; +%name_to_color({crayon, lavender, A}) -> { 252, 180, 213, A}; +%name_to_color({crayon, 'cotton candy', A}) -> { 255, 188, 217, A}; +%name_to_color({crayon, 'violet red', A}) -> { 247, 83, 148, A}; +%name_to_color({crayon, 'carnation pink', A}) -> { 255, 170, 204, A}; +%name_to_color({crayon, razzmatazz, A}) -> { 227, 37, 107, A}; +%name_to_color({crayon, 'piggy pink', A}) -> { 253, 215, 228, A}; +%name_to_color({crayon, 'jazzberry jam', A}) -> { 202, 55, 103, A}; +%name_to_color({crayon, blush, A}) -> { 222, 93, 131, A}; +%name_to_color({crayon, 'tickle me pink', A}) -> { 252, 137, 172, A}; +%name_to_color({crayon, 'pink sherbet', A}) -> { 247, 128, 161, A}; +%name_to_color({crayon, maroon, A}) -> { 200, 56, 90, A}; +%name_to_color({crayon, red, A}) -> { 238, 32, 77, A}; +%name_to_color({crayon, 'radical red', A}) -> { 255, 73, 108, A}; +%name_to_color({crayon, mauvelous, A}) -> { 239, 152, 170, A}; +%name_to_color({crayon, 'wild watermelon', A}) -> { 252, 108, 133, A}; +%name_to_color({crayon, scarlet, A}) -> { 252, 40, 71, A}; +%name_to_color({crayon, salmon, A}) -> { 255, 155, 170, A}; +%name_to_color({crayon, 'brick red', A}) -> { 203, 65, 84, A}; +%name_to_color({crayon, white, A}) -> { 237, 237, 237, A}; +%name_to_color({crayon, timberwolf, A}) -> { 219, 215, 210, A}; +%name_to_color({crayon, silver, A}) -> { 205, 197, 194, A}; +%name_to_color({crayon, gray, A}) -> { 149, 145, 140, A}; +%name_to_color({crayon, black, A}) -> { 35, 35, 35, A}. + + +text(I, {Xs,Ys} = Sp, Font, Text, Color) -> + {FW,FH} = egd_font:size(Font), + Length = length(Text), + Ep = {Xs + Length*FW, Ys + FH + 5}, + I#image{objects = [ + #image_object{ + type = text_horizontal, + points = [Sp], + span = span([Sp,Ep]), + internals = {Font, Text}, + color = Color} | I#image.objects]}. + + +%%% Generic transformations + +%% arc_to_edges +%% In: +%% P1 :: point(), +%% P2 :: point(), +%% D :: float(), +%% Out: +%% Res :: [edges()] + +arc_to_edges(P0, P1, D) when abs(D) < 0.5 -> [{P0,P1}]; +arc_to_edges({X0,Y0}, {X1,Y1}, D) -> + Vx = X1 - X0, + Vy = Y1 - Y0, + + Mx = X0 + 0.5 * Vx, + My = Y0 + 0.5 * Vy, + + % Scale V by Rs + L = math:sqrt(Vx*Vx + Vy*Vy), + Sx = D*Vx/L, + Sy = D*Vy/L, + + Bx = trunc(Mx - Sy), + By = trunc(My + Sx), + + arc_to_edges({X0,Y0}, {Bx,By}, D/4) ++ arc_to_edges({Bx,By}, {X1,Y1}, D/4). + +%% edges +%% In: +%% Pts :: [point()] +%% Out: +%% Edges :: [{point(),point()}] + +edges([]) -> []; +edges([P0|_] = Pts) -> edges(Pts, P0,[]). +edges([P1], P0, Out) -> [{P1,P0}|Out]; +edges([P1,P2|Pts],P0,Out) -> edges([P2|Pts],P0,[{P1,P2}|Out]). + +%% convex_hull +%% In: +%% Ps :: [point()] +%% Out: +%% Res :: [point()] + +convex_hull(Ps) -> + P0 = lower_right(Ps), + [P1|Ps1] = lists:sort(fun + (P2,P1) -> + case point_side({P1,P0},P2) of + left -> true; + _ -> false + end + end, Ps -- [P0]), + convex_hull(Ps1, [P1,P0]). + +convex_hull([], W) -> W; +convex_hull([P|Pts], [P1,P2|W]) -> + case point_side({P2,P1},P) of + left -> convex_hull(Pts, [P,P1,P2|W]); + _ -> convex_hull([P|Pts], [P2|W]) + end. + +lower_right([P|Pts]) -> lower_right(P, Pts). +lower_right(P, []) -> P; +lower_right({X0,Y0}, [{_,Y}|Pts]) when Y < Y0 -> lower_right({X0,Y0}, Pts); +lower_right({X0,Y0}, [{X,Y}|Pts]) when X < X0, Y < Y0 -> lower_right({X0,Y0}, Pts); +lower_right(_,[P|Pts]) -> lower_right(P, Pts). + +point_side({{X0,Y0}, {X1, Y1}}, {X2, Y2}) -> point_side((X1 - X0)*(Y2 - Y0) - (X2 - X0)*(Y1 - Y0)). +point_side(D) when D > 0 -> left; +point_side(D) when D < 0 -> right; +point_side(_) -> on_line. + +%% AUX + +span(Points) -> + Xs = [TX||{TX, _} <- Points], + Ys = [TY||{_, TY} <- Points], + Xmin = lists:min(Xs), + Xmax = lists:max(Xs), + Ymin = lists:min(Ys), + Ymax = lists:max(Ys), + {Xmin,Ymin,Xmax,Ymax}. + +rgb_float2byte({R,G,B}) -> rgb_float2byte({R,G,B,1.0}); +rgb_float2byte({R,G,B,A}) -> + {trunc(R*255), trunc(G*255), trunc(B*255), trunc(A*255)}. + +rgba_byte2float({R,G,B,A}) -> + {R/255,G/255,B/255,A/255}. |