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- #ifndef __EYE_ADAPTATION__
- #define __EYE_ADAPTATION__
-
- // Optimal values for PS4/GCN
- // Using a group size of 32x32 seems to be a bit faster on Kepler/Maxwell
- // Don't forget to update 'EyeAdaptationController.cs' if you change these values !
- #define HISTOGRAM_BINS 64
- #define HISTOGRAM_TEXELS HISTOGRAM_BINS / 4
- #define HISTOGRAM_THREAD_X 16
- #define HISTOGRAM_THREAD_Y 16
-
- float GetHistogramBinFromLuminance(float value, float2 scaleOffset)
- {
- return saturate(log2(value) * scaleOffset.x + scaleOffset.y);
- }
-
- float GetLuminanceFromHistogramBin(float bin, float2 scaleOffset)
- {
- return exp2((bin - scaleOffset.y) / scaleOffset.x);
- }
-
- #endif // __EYE_ADAPTATION__
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