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2x alpha: Safer change than the last attempt. Still fixes P2. I think this can be simplified, anyway.

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Henrik Rydgard 2014-03-29 12:10:44 +01:00
parent 27767fa85c
commit 37e9fc59b3
3 changed files with 13 additions and 4 deletions
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GPU/GLES/DepalettizeShader.cpp Normal file
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GPU/GLES/DepalettizeShader.h Normal file
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17
GPU/GLES/FragmentShaderGenerator.cpp
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@ -234,6 +234,13 @@ static bool IsColorTestTriviallyTrue() {
}
}
static bool AlphaToColorDoubling() {
// 2x alpha in the source function and full alpha = source color doubling.
// If we see this, we don't really need to care about the dest alpha function - sure we can't handle
// the doubling dest ones, but there's nothing we can do about that.
return (gstate.getBlendFuncA() == GE_SRCBLEND_DOUBLESRCALPHA) && (gstate_c.vertexFullAlpha && (gstate_c.textureFullAlpha || !gstate.isTextureAlphaUsed()));
}
static bool CanDoubleSrcBlendMode() {
if (!gstate.isAlphaBlendEnabled()) {
return false;
@ -275,9 +282,10 @@ void ComputeFragmentShaderID(FragmentShaderID *id) {
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !g_Config.bDisableAlphaTest;
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue();
bool enableColorDoubling = gstate.isColorDoublingEnabled();
bool alphaToColorDoubling = AlphaToColorDoubling();
bool enableColorDoubling = gstate.isColorDoublingEnabled() || alphaToColorDoubling;
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool enableAlphaDoubling = !alphaToColorDoubling && CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
ReplaceAlphaType stencilToAlpha = ReplaceAlphaWithStencil();
@ -381,9 +389,10 @@ void GenerateFragmentShader(char *buffer) {
bool enableFog = gstate.isFogEnabled() && !gstate.isModeThrough() && !gstate.isModeClear();
bool enableAlphaTest = gstate.isAlphaTestEnabled() && !IsAlphaTestTriviallyTrue() && !gstate.isModeClear() && !g_Config.bDisableAlphaTest;
bool enableColorTest = gstate.isColorTestEnabled() && !IsColorTestTriviallyTrue() && !gstate.isModeClear();
bool enableColorDoubling = gstate.isColorDoublingEnabled() && gstate.isTextureMapEnabled();
bool alphaToColorDoubling = AlphaToColorDoubling();
bool enableColorDoubling = (gstate.isColorDoublingEnabled() && gstate.isTextureMapEnabled()) || alphaToColorDoubling;
// This isn't really correct, but it's a hack to get doubled blend modes to work more correctly.
bool enableAlphaDoubling = CanDoubleSrcBlendMode();
bool enableAlphaDoubling = !alphaToColorDoubling && CanDoubleSrcBlendMode();
bool doTextureProjection = gstate.getUVGenMode() == GE_TEXMAP_TEXTURE_MATRIX;
bool doTextureAlpha = gstate.isTextureAlphaUsed();
ReplaceAlphaType stencilToAlpha = ReplaceAlphaWithStencil();