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GPU/HW: Clear alpha channel in opaque replacements 

This is the value for bit15 in the framebuffer. Silent Hill
needs it to be zero, I'm not aware of anything that needs
specific values yet. If it did, we'd need a different dumping
technique.
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Stenzek 2025-01-16 23:25:23 +10:00
parent a0c075e079
commit cd8a160d8d
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1 changed files with 7 additions and 4 deletions
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11
src/core/gpu_hw_shadergen.cpp
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@ -1880,11 +1880,14 @@ std::string GPU_HW_ShaderGen::GenerateReplacementMergeFragmentShader(bool semitr
o_col0.a = (color.a <= 0.95f) ? 1.0f : 0.0f;
o_col0.a = VECTOR_EQ(color, float4(0.0, 0.0, 0.0, 0.0)) ? 0.0f : o_col0.a;
#else
// Leave (0,0,0,0) as 0000 for opaque replacements for cutout alpha.
o_col0.a = color.a;
// Map anything with an alpha below 0.5 to transparent.
o_col0 = lerp(o_col0, float4(0.0, 0.0, 0.0, 0.0), float(o_col0.a < 0.5));
// Leave (0,0,0,0) as 0000 for opaque replacements for cutout alpha.
o_col0.rgb = lerp(o_col0.rgb, float3(0.0, 0.0, 0.0), float(color.a < 0.5));
// Clear alpha channel. This is the value for bit15 in the framebuffer.
// Silent Hill needs it to be zero, I'm not aware of anything that needs
// specific values yet. If it did, we'd need a different dumping technique.
o_col0.a = 0.0;
#endif
}
)";