-uniform sampler2D tex;
-vec3 srgb_to_linear(vec3 color)
-{
- return mix(color.rgb/12.92, pow((color.rgb+0.055)/1.055, vec3(2.4)), lessThan(color, vec3(0.04045)));
-}
-vec4 srgb_to_linear(vec4 color)
-{
- return vec4(srgb_to_linear(color.rgb), color.a);
-}