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rasterizer: implement combiner operation 7 (Dot3_RGBA)

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This commit is contained in:
wwylele 2017-04-19 23:48:10 +03:00
parent 6a72bd62b5
commit b624a95205
4 changed files with 38 additions and 19 deletions
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3
src/video_core/swrasterizer/texturing.cpp
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@ -169,7 +169,8 @@ Math::Vec3<u8> ColorCombine(TevStageConfig::Operation op, const Math::Vec3<u8> i
result = (result * input[2].Cast<int>()) / 255;
return result.Cast<u8>();
}
case Operation::Dot3_RGB: {
case Operation::Dot3_RGB:
case Operation::Dot3_RGBA: {
// Not fully accurate. Worst case scenario seems to yield a +/-3 error. Some HW results
// indicate that the per-component computation can't have a higher precision than 1/256,
// while dot3_rgb((0x80,g0,b0), (0x7F,g1,b1)) and dot3_rgb((0x80,g0,b0), (0x80,g1,b1)) give