Load various built-in things through Resources

[libs/gl.git] / builtin_data / _colorcurve.glsl

diff --git a/builtin_data/_colorcurve.glsl b/builtin_data/_colorcurve.glsl
new file mode 100644 (file)
index 0000000..23b5577
--- /dev/null
+++ b/builtin_data/_colorcurve.glsl
@@ -0,0 +1,24 @@
+import postprocess;
+
+uniform sampler1D curve;
+uniform ToneMapping
+{
+       float exposure;
+       vec3 brightness_response;
+};
+
+#pragma MSP stage(fragment)
+void main()
+{
+       vec4 incoming = texture(source, texcoord);
+       float maxc = max(incoming.r, max(incoming.g, incoming.b));
+       if(maxc>0.0)
+       {
+               vec3 saturated = incoming.rgb/maxc;
+               maxc = pow(maxc*exposure+brightness_response.y, brightness_response.x)-brightness_response.z;
+               float c = min(maxc, 1.0);
+               float minc = min(saturated.r, min(saturated.g, saturated.b));
+               incoming.rgb = mix(saturated, vec3(1.0), min((maxc-c)/(1.0-minc), 1.0))*c;
+       }
+       frag_color = vec4(texture(curve, incoming.r).r, texture(curve, incoming.g).r, texture(curve, incoming.b).r, incoming.a);
+}