working framebuffers, textures and feedback

src/types.h

@@ -36,9 +36,10 @@ typedef struct ShaderProgram {
   GLuint programs[BUFFER_COUNT + 1];
 
   GLuint vertex_shader;
-  GLuint fragment_shader;
   GLuint output_fragment_shader;
 
+  GLuint fragment_shader; // TODO multiple
+
   GLuint itime_locations[BUFFER_COUNT];
   GLuint ires_locations[BUFFER_COUNT];
   GLuint frames_locations[BUFFER_COUNT + 1][BUFFER_COUNT];