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GPU/HW: Use signed difference in luma_distance()

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Fixes the warning, and also underflowing, since both were unsigned
it would overflow if the second was greater the first.
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Stenzek 2025-06-13 20:54:00 +10:00
parent ac0c4544e1
commit a8db46a6b8
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src/core/gpu_hw_shadergen.cpp
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@ -787,7 +787,7 @@ float rgb_distance(uint a, uint b)
// Calculate the luminance difference between two ABGR8 colors and normalize it // Calculate the luminance difference between two ABGR8 colors and normalize it
float luma_distance(uint a, uint b) float luma_distance(uint a, uint b)
{ {
return abs(luma(a) - luma(b)) * 0.0006535948f; // Multiplicative replacement for division by 1530 return abs(int(luma(a)) - int(luma(b))) * 0.0006535948f; // Multiplicative replacement for division by 1530
} }
/*============================================================================= /*=============================================================================