src/sksl/sksl_rt_colorfilter.sksl

half4 shade(shader s, float2 coords);
half4 filter(colorFilter f, half4 color);
half4 blend(blender b, half4 src, half4 dst);

half4 sample(shader s, float2 coords);
half4 sample(colorFilter f, half4 color);
half4 sample(blender b, half4 src, half4 dst);