From 2443a070e75e33285b6d5ed0ce89c989956b9065 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Thu, 15 Jun 2017 15:31:13 -0400
Subject: Add colored quad and ellipse rendering primitives

---
 render/gles3/shaders.c | 75 ++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 55 insertions(+), 20 deletions(-)

(limited to 'render/gles3/shaders.c')

diff --git a/render/gles3/shaders.c b/render/gles3/shaders.c
index f53ef385..dd7f790f 100644
--- a/render/gles3/shaders.c
+++ b/render/gles3/shaders.c
@@ -1,28 +1,63 @@
 #include "render/gles3.h"
 #include <GLES3/gl3.h>
 
+// Colored quads
+const GLchar quad_vertex_src[] =
+"uniform mat4 proj;"
+"uniform vec4 color;"
+"attribute vec2 pos;"
+"attribute vec2 texcoord;"
+"varying vec4 v_color;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"  gl_Position = proj * vec4(pos, 0.0, 1.0);"
+"  v_color = color;"
+"  v_texcoord = texcoord;"
+"}";
+
+const GLchar quad_fragment_src[] =
+"precision mediump float;"
+"varying vec4 v_color;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"  gl_FragColor = v_color;"
+"}";
+
+// Colored ellipses (TODO)
+
+const GLchar ellipse_fragment_src[] =
+"precision mediump float;"
+"varying vec4 v_color;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"  float l = length(v_texcoord - vec2(0.5, 0.5));"
+"  if (l > 0.5) discard;"
+"  gl_FragColor = v_color;"
+"}";
+
+// Textured quads
 const GLchar vertex_src[] =
-"uniform mat4 proj;\n"
-"attribute vec2 pos;\n"
-"attribute vec2 texcoord;\n"
-"varying vec2 v_texcoord;\n"
-"void main() {\n"
-"	gl_Position = proj * vec4(pos, 0.0, 1.0);\n"
-"	v_texcoord = texcoord;\n"
-"}\n";
+"uniform mat4 proj;"
+"attribute vec2 pos;"
+"attribute vec2 texcoord;"
+"varying vec2 v_texcoord;"
+"void main() {"
+"	gl_Position = proj * vec4(pos, 0.0, 1.0);"
+"	v_texcoord = texcoord;"
+"}";
 
 const GLchar fragment_src_RGB[] =
-"precision mediump float;\n"
-"varying vec2 v_texcoord;\n"
-"uniform sampler2D tex;\n"
-"void main() {\n"
-"	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);\n"
-"}\n";
+"precision mediump float;"
+"varying vec2 v_texcoord;"
+"uniform sampler2D tex;"
+"void main() {"
+"	gl_FragColor = vec4(texture2D(tex, v_texcoord).rgb, 1.0);"
+"}";
 
 const GLchar fragment_src_RGBA[] =
-"precision mediump float;\n"
-"varying vec2 v_texcoord;\n"
-"uniform sampler2D tex;\n"
-"void main() {\n"
-"	gl_FragColor = texture2D(tex, v_texcoord);\n"
-"}\n";
+"precision mediump float;"
+"varying vec2 v_texcoord;"
+"uniform sampler2D tex;"
+"void main() {"
+"	gl_FragColor = texture2D(tex, v_texcoord);"
+"}";
-- 
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