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Pica/TextureEnvironment: Add support for the MAD-like texture combiners and clean up texture environment logic.

This commit is contained in:
Tony Wasserka 2015-01-03 13:45:10 +01:00
parent 087edcfbec
commit 04cd06d5c2
2 changed files with 28 additions and 0 deletions
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3
src/video_core/pica.h
View File

@ -266,6 +266,9 @@ struct Regs {
AddSigned = 3,
Lerp = 4,
Subtract = 5,
MultiplyThenAdd = 8,
AddThenMultiply = 9,
};
union {

25
src/video_core/rasterizer.cpp
View File

@ -419,6 +419,25 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
return result.Cast<u8>();
}
case Operation::MultiplyThenAdd:
{
auto result = (input[0] * input[1] + 255 * input[2].Cast<int>()) / 255;
result.r() = std::min(255, result.r());
result.g() = std::min(255, result.g());
result.b() = std::min(255, result.b());
return result.Cast<u8>();
}
case Operation::AddThenMultiply:
{
auto result = input[0] + input[1];
result.r() = std::min(255, result.r());
result.g() = std::min(255, result.g());
result.b() = std::min(255, result.b());
result = (result * input[2].Cast<int>()) / 255;
return result.Cast<u8>();
}
default:
LOG_ERROR(HW_GPU, "Unknown color combiner operation %d\n", (int)op);
UNIMPLEMENTED();
@ -443,6 +462,12 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
case Operation::Subtract:
return std::max(0, (int)input[0] - (int)input[1]);
case Operation::MultiplyThenAdd:
return std::min(255, (input[0] * input[1] + 255 * input[2]) / 255);
case Operation::AddThenMultiply:
return (std::min(255, (input[0] + input[1])) * input[2]) / 255;
default:
LOG_ERROR(HW_GPU, "Unknown alpha combiner operation %d\n", (int)op);
UNIMPLEMENTED();