+// See footer.frag for details about this if statement.
+#ifndef YCBCR_ALSO_OUTPUT_RGBA
+#define YCBCR_ALSO_OUTPUT_RGBA 0
+#endif
+
uniform sampler2D PREFIX(tex_y);
uniform sampler2D PREFIX(tex_cb);
uniform sampler2D PREFIX(tex_cr);
+#if YCBCR_ALSO_OUTPUT_RGBA
+vec4[2] FUNCNAME(vec2 tc) {
+#else
vec4 FUNCNAME(vec2 tc) {
+#endif
vec4 rgba = INPUT(tc);
vec4 ycbcr_a;
#endif
ycbcr_a.a = rgba.a;
+
+#if YCBCR_ALSO_OUTPUT_RGBA
+ return vec4[2](ycbcr_a, rgba);
+#else
return ycbcr_a;
+#endif
}