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gl_rasterizer/lighting: fix LUT interpolation

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This commit is contained in:
wwylele 2017-06-16 14:00:15 +03:00
parent d0888f8548
commit ab60414122
7 changed files with 102 additions and 116 deletions
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12
src/video_core/pica_state.h
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@ -87,12 +87,18 @@ struct State {
// LUT value, encoded as 12-bit fixed point, with 12 fraction bits
BitField<0, 12, u32> value; // 0.0.12 fixed point
// Used by HW for efficient interpolation, Citra does not use these
BitField<12, 12, s32> difference; // 1.0.11 fixed point
// Used for efficient interpolation.
BitField<12, 11, u32> difference; // 0.0.11 fixed point
BitField<23, 1, u32> neg_difference;
float ToFloat() {
float ToFloat() const {
return static_cast<float>(value) / 4095.f;
}
float DiffToFloat() const {
float diff = static_cast<float>(difference) / 2047.f;
return neg_difference ? -diff : diff;
}
};
std::array<std::array<LutEntry, 256>, 24> luts;