diff options
| author | skidau <skidau@gmail.com> | 2012-08-06 09:29:01 +1000 |
|---|---|---|
| committer | skidau <skidau@gmail.com> | 2012-08-06 09:29:01 +1000 |
| commit | 0efd4e5c29766ba5f5d22204339637ade9ccec83 (patch) | |
| tree | 92afd1cae763dd6029db0360dbb017bd55211ded /Source/Core/VideoCommon/Src/PixelShaderManager.cpp | |
| parent | 86a1899b9e9f196e23cb87f654fbc8e6efc9e862 (diff) | |
Skipped the ZCompLoc pass if the result can be determined at compile time. Brings back the speed lost by r146b02615c07.
Diffstat (limited to 'Source/Core/VideoCommon/Src/PixelShaderManager.cpp')
| -rw-r--r-- | Source/Core/VideoCommon/Src/PixelShaderManager.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Source/Core/VideoCommon/Src/PixelShaderManager.cpp b/Source/Core/VideoCommon/Src/PixelShaderManager.cpp index 1533f9348e..52468d0262 100644 --- a/Source/Core/VideoCommon/Src/PixelShaderManager.cpp +++ b/Source/Core/VideoCommon/Src/PixelShaderManager.cpp @@ -466,6 +466,39 @@ void PixelShaderManager::SetMaterialColorChanged(int index) nMaterialsChanged |= (1 << index); } +ALPHA_PRETEST_RESULT PixelShaderManager::AlphaPreTest() +{ + u32 op = bpmem.alphaFunc.logic; + u32 comp[2] = {bpmem.alphaFunc.comp0, bpmem.alphaFunc.comp1}; + + // First kill all the simple cases + switch(op) + { + case 0: // AND + if (comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) return ALPHAPT_ALWAYSPASS; + if (comp[0] == ALPHACMP_NEVER || comp[1] == ALPHACMP_NEVER) return ALPHAPT_ALWAYSFAIL; + break; + case 1: // OR + if (comp[0] == ALPHACMP_ALWAYS || comp[1] == ALPHACMP_ALWAYS) return ALPHAPT_ALWAYSPASS; + if (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER)return ALPHAPT_ALWAYSFAIL; + break; + case 2: // XOR + if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_NEVER) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_ALWAYS)) + return ALPHAPT_ALWAYSPASS; + if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER)) + return ALPHAPT_ALWAYSFAIL; + break; + case 3: // XNOR + if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_NEVER) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_ALWAYS)) + return ALPHAPT_ALWAYSFAIL; + if ((comp[0] == ALPHACMP_ALWAYS && comp[1] == ALPHACMP_ALWAYS) || (comp[0] == ALPHACMP_NEVER && comp[1] == ALPHACMP_NEVER)) + return ALPHAPT_ALWAYSPASS; + break; + default: PanicAlert("bad logic for alpha test? %08x", op); + } + return ALPHAPT_UNDEFINED; +} + void PixelShaderManager::DoState(PointerWrap &p) { p.Do(lastRGBAfull); |