+++ /dev/null
-// Saturate/desaturate (in linear space).
-
-vec4 FUNCNAME(vec2 tc) {
- vec4 x = LAST_INPUT(tc);
-
- float luminance = dot(x.rgb, vec3(0.2126, 0.7152, 0.0722));
- x.rgb = mix(vec3(luminance), x.rgb, PREFIX(saturation));
-
- return x;
-}