Add shader module.

* 2d/shader.scm: New module.
* Makefile.am: Add 2d/shader.scm to SOURCES.
* examples/shader.scm: New example.
* examples/shaders/fragment-shader.glsl: New shader.
* examples/shaders/vertex-shader.glsl: New shader.

1 files changed, 7 insertions, 0 deletions

diff --git a/examples/shaders/fragment-shader.glsl b/examples/shaders/fragment-shader.glsl
new file mode 100644
index 0000000..9be52f0
--- /dev/null
+++ b/examples/shaders/fragment-shader.glsl
@@ -0,0 +1,7 @@
+#version 120
+
+uniform sampler2D color_texture;
+
+void main (void) {
+    gl_FragColor = texture2D(color_texture, gl_TexCoord[0].st);
+}