Support rendering YUV formatted frames

data/yuv.vert

@@ -0,0 +1,25 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+attribute vec2 vert;
+attribute vec2 tex_coord;
+
+uniform mat3 transform;
+uniform vec2 pixel_size;
+
+varying vec2 top_left_uv;
+varying vec2 top_right_uv;
+varying vec2 bottom_left_uv;
+varying vec2 bottom_right_uv;
+
+void
+main()
+{
+    top_left_uv = tex_coord - pixel_size / 2.0;
+    bottom_right_uv = tex_coord + pixel_size / 2.0;
+    top_right_uv = vec2(top_left_uv.x, bottom_right_uv.y);
+    bottom_left_uv = vec2(bottom_right_uv.x, top_left_uv.y);
+
+    gl_Position = vec4(transform * vec3(vert, 1), 1);
+}