From 372f50eb8c9d4ea9e7e9ff78a76b8320e8acd018 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Fri, 4 Apr 2014 21:54:01 +0200
Subject: Add sdl_renderer:draw_line/{3,5}

---
 c_src/esdl2.h        |  1 +
 c_src/sdl_renderer.c | 25 +++++++++++++++++++++++++
 src/esdl2.erl        |  4 ++++
 src/sdl_renderer.erl |  9 +++++++++
 4 files changed, 39 insertions(+)

diff --git a/c_src/esdl2.h b/c_src/esdl2.h
index 6dbc43f..8899602 100644
--- a/c_src/esdl2.h
+++ b/c_src/esdl2.h
@@ -173,6 +173,7 @@
 	F(render_clear, 1) \
 	F(render_copy, 4) \
 	F(render_copy_ex, 7) \
+	F(render_draw_line, 5) \
 	F(render_present, 1) \
 	F(render_set_logical_size, 3) \
 	F(set_render_draw_color, 5) \
diff --git a/c_src/sdl_renderer.c b/c_src/sdl_renderer.c
index 5fa9628..2d6c319 100644
--- a/c_src/sdl_renderer.c
+++ b/c_src/sdl_renderer.c
@@ -362,6 +362,31 @@ render_copy_ex_badarg:
 	return enif_make_badarg(env);
 }
 
+// render_draw_line
+
+NIF_CALL_HANDLER(thread_render_draw_line)
+{
+	if (SDL_RenderDrawLine(args[0], (long)args[1], (long)args[2], (long)args[3], (long)args[4]))
+		return sdl_error_tuple(env);
+
+	return atom_ok;
+}
+
+NIF_FUNCTION(render_draw_line)
+{
+	void* renderer_res;
+	int x1, y1, x2, y2;
+
+	BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res));
+	BADARG_IF(!enif_get_int(env, argv[1], &x1));
+	BADARG_IF(!enif_get_int(env, argv[2], &y1));
+	BADARG_IF(!enif_get_int(env, argv[3], &x2));
+	BADARG_IF(!enif_get_int(env, argv[4], &y2));
+
+	return nif_thread_call(env, thread_render_draw_line, 5,
+		NIF_RES_GET(Renderer, renderer_res), x1, y1, x2, y2);
+}
+
 // render_present
 
 NIF_CAST_HANDLER(thread_render_present)
diff --git a/src/esdl2.erl b/src/esdl2.erl
index e9bca0f..6f38c3b 100644
--- a/src/esdl2.erl
+++ b/src/esdl2.erl
@@ -61,6 +61,7 @@
 -export([render_clear/1]).
 -export([render_copy/4]).
 -export([render_copy_ex/7]).
+-export([render_draw_line/5]).
 -export([render_present/1]).
 -export([render_set_logical_size/3]).
 -export([set_render_draw_color/5]).
@@ -233,6 +234,9 @@ render_copy(_, _, _, _) ->
 render_copy_ex(_, _, _, _, _, _, _) ->
 	erlang:nif_error({not_loaded, ?MODULE}).
 
+render_draw_line(_, _, _, _, _) ->
+	erlang:nif_error({not_loaded, ?MODULE}).
+
 render_present(_) ->
 	erlang:nif_error({not_loaded, ?MODULE}).
 
diff --git a/src/sdl_renderer.erl b/src/sdl_renderer.erl
index 3994ab7..624b296 100644
--- a/src/sdl_renderer.erl
+++ b/src/sdl_renderer.erl
@@ -23,6 +23,8 @@
 -export([copy/2]).
 -export([copy/4]).
 -export([copy/7]).
+-export([draw_line/3]).
+-export([draw_line/5]).
 -export([present/1]).
 -export([set_draw_color/5]).
 -export([set_logical_size/3]).
@@ -72,6 +74,13 @@ copy(Renderer, Texture, SrcRect, DstRect, Angle, CenterPoint, FlipFlags) ->
 	esdl2:render_copy_ex(Renderer, Texture, SrcRect, DstRect, Angle, CenterPoint, FlipFlags),
 	receive {'_nif_thread_ret_', Ret} -> Ret end.
 
+draw_line(Renderer, #{x:=X1, y:=Y1}, #{x:=X2, y:=Y2}) ->
+	draw_line(Renderer, X1, Y1, X2, Y2).
+
+draw_line(Renderer, X1, Y1, X2, Y2) ->
+	esdl2:render_draw_line(Renderer, X1, Y1, X2, Y2),
+	receive {'_nif_thread_ret_', Ret} -> Ret end.
+
 present(Renderer) ->
 	esdl2:render_present(Renderer).
 
-- 
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