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SwRasterizer: Move the alpha test to its own function.

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This commit is contained in:
Subv 2017-06-10 11:57:01 -05:00
parent 8f0a23b631
commit e7ad8f9e14
1 changed files with 39 additions and 40 deletions
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79
src/video_core/swrasterizer/rasterizer.cpp
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@ -114,6 +114,42 @@ static std::tuple<float24, float24, PAddr> ConvertCubeCoord(float24 u, float24 v
return std::make_tuple(x / z * half + half, y / z * half + half, addr);
}
bool PerformAlphaTest(const Math::Vec4<u8>& combiner_output) {
const auto& output_merger = g_state.regs.framebuffer.output_merger;
if (!output_merger.alpha_test.enable)
return true;
switch (output_merger.alpha_test.func) {
case FramebufferRegs::CompareFunc::Never:
return false;
case FramebufferRegs::CompareFunc::Always:
return true;
case FramebufferRegs::CompareFunc::Equal:
return combiner_output.a() == output_merger.alpha_test.ref;
case FramebufferRegs::CompareFunc::NotEqual:
return combiner_output.a() != output_merger.alpha_test.ref;
case FramebufferRegs::CompareFunc::LessThan:
return combiner_output.a() < output_merger.alpha_test.ref;
case FramebufferRegs::CompareFunc::LessThanOrEqual:
return combiner_output.a() <= output_merger.alpha_test.ref;
case FramebufferRegs::CompareFunc::GreaterThan:
return combiner_output.a() > output_merger.alpha_test.ref;
case FramebufferRegs::CompareFunc::GreaterThanOrEqual:
return combiner_output.a() >= output_merger.alpha_test.ref;
}
LOG_CRITICAL(HW_GPU, "Invalid alpha test compare function");
UNREACHABLE();
};
MICROPROFILE_DEFINE(GPU_Rasterization, "GPU", "Rasterization", MP_RGB(50, 50, 240));
/**
@ -507,47 +543,10 @@ static void ProcessTriangleInternal(const Vertex& v0, const Vertex& v1, const Ve
}
const auto& output_merger = regs.framebuffer.output_merger;
// TODO: Does alpha testing happen before or after stencil?
if (output_merger.alpha_test.enable) {
bool pass = false;
switch (output_merger.alpha_test.func) {
case FramebufferRegs::CompareFunc::Never:
pass = false;
break;
case FramebufferRegs::CompareFunc::Always:
pass = true;
break;
case FramebufferRegs::CompareFunc::Equal:
pass = combiner_output.a() == output_merger.alpha_test.ref;
break;
case FramebufferRegs::CompareFunc::NotEqual:
pass = combiner_output.a() != output_merger.alpha_test.ref;
break;
case FramebufferRegs::CompareFunc::LessThan:
pass = combiner_output.a() < output_merger.alpha_test.ref;
break;
case FramebufferRegs::CompareFunc::LessThanOrEqual:
pass = combiner_output.a() <= output_merger.alpha_test.ref;
break;
case FramebufferRegs::CompareFunc::GreaterThan:
pass = combiner_output.a() > output_merger.alpha_test.ref;
break;
case FramebufferRegs::CompareFunc::GreaterThanOrEqual:
pass = combiner_output.a() >= output_merger.alpha_test.ref;
break;
}
if (!pass)
continue;
}
if (!PerformAlphaTest(combiner_output))
continue;
// Apply fog combiner
// Not fully accurate. We'd have to know what data type is used to