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swr: [rasterizer jitter] Fix logic bug for alpha-to-coverage.

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This commit is contained in:
Tim Rowley 2016-03-23 18:12:11 -06:00
parent 0767e820fd
commit 090be2e434
1 changed files with 11 additions and 2 deletions
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13
src/gallium/drivers/swr/rasterizer/jitter/blend_jit.cpp
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@ -576,9 +576,12 @@ struct BlendJit : public Builder
src1[i] = LOAD(pSrc1, { i });
}
Value* currentMask = VIMMED1(-1);
if(state.desc.alphaToCoverageEnable)
if (state.desc.alphaToCoverageEnable)
{
currentMask = FP_TO_SI(FMUL(src[3], VBROADCAST(C((float)state.desc.numSamples))), mSimdInt32Ty);
Value* pClampedSrc = FCLAMP(src[3], 0.0f, 1.0f);
uint32_t bits = (1 << state.desc.numSamples) - 1;
currentMask = FMUL(pClampedSrc, VBROADCAST(C((float)bits)));
currentMask = FP_TO_SI(FADD(currentMask, VIMMED1(0.5f)), mSimdInt32Ty);
}
// alpha test
@ -702,6 +705,12 @@ struct BlendJit : public Builder
currentMask = AND(sampleMask, currentMask);
}
if (state.desc.alphaToCoverageEnable)
{
Value* sampleMasked = SHL(C(1), sampleNum);
currentMask = AND(currentMask, VBROADCAST(sampleMasked));
}
if(state.desc.sampleMaskEnable || state.desc.alphaToCoverageEnable ||
state.desc.oMaskEnable)
{