builtin_data/_colorcurve.glsl

   1 import flat_effect;
   2
   3 uniform ToneMapping
   4 {
   5         float exposure;
   6         vec3 brightness_response;
   7 };
   8
   9 uniform sampler2D source;
  10 uniform sampler1D curve;
  11
  12 #pragma MSP stage(fragment)
  13 layout(location=0) out vec4 frag_color;
  14 void main()
  15 {
  16         vec4 incoming = texture(source, texcoord);
  17         float maxc = max(incoming.r, max(incoming.g, incoming.b));
  18         if(maxc>0.0)
  19         {
  20                 vec3 saturated = incoming.rgb/maxc;
  21                 maxc = pow(maxc*exposure+brightness_response.y, brightness_response.x)-brightness_response.z;
  22                 float c = min(maxc, 1.0);
  23                 float minc = min(saturated.r, min(saturated.g, saturated.b));
  24                 incoming.rgb = mix(saturated, vec3(1.0), min((maxc-c)/(1.0-minc), 1.0))*c;
  25         }
  26         frag_color = vec4(texture(curve, incoming.r).r, texture(curve, incoming.g).r, texture(curve, incoming.b).r, incoming.a);
  27 }