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Pica/TextureEnvironment: Add support for the MAD-like texture combiners and clean up texture environment logic.
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2 changed files with 28 additions and 0 deletions
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@ -266,6 +266,9 @@ struct Regs {
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AddSigned = 3,
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AddSigned = 3,
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Lerp = 4,
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Lerp = 4,
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Subtract = 5,
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Subtract = 5,
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MultiplyThenAdd = 8,
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AddThenMultiply = 9,
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};
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};
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union {
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union {
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@ -419,6 +419,25 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
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return result.Cast<u8>();
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return result.Cast<u8>();
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}
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}
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case Operation::MultiplyThenAdd:
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{
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auto result = (input[0] * input[1] + 255 * input[2].Cast<int>()) / 255;
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result.r() = std::min(255, result.r());
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result.g() = std::min(255, result.g());
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result.b() = std::min(255, result.b());
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return result.Cast<u8>();
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}
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case Operation::AddThenMultiply:
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{
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auto result = input[0] + input[1];
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result.r() = std::min(255, result.r());
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result.g() = std::min(255, result.g());
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result.b() = std::min(255, result.b());
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result = (result * input[2].Cast<int>()) / 255;
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return result.Cast<u8>();
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}
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default:
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default:
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LOG_ERROR(HW_GPU, "Unknown color combiner operation %d\n", (int)op);
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LOG_ERROR(HW_GPU, "Unknown color combiner operation %d\n", (int)op);
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UNIMPLEMENTED();
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UNIMPLEMENTED();
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@ -443,6 +462,12 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
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case Operation::Subtract:
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case Operation::Subtract:
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return std::max(0, (int)input[0] - (int)input[1]);
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return std::max(0, (int)input[0] - (int)input[1]);
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case Operation::MultiplyThenAdd:
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return std::min(255, (input[0] * input[1] + 255 * input[2]) / 255);
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case Operation::AddThenMultiply:
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return (std::min(255, (input[0] + input[1])) * input[2]) / 255;
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default:
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default:
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LOG_ERROR(HW_GPU, "Unknown alpha combiner operation %d\n", (int)op);
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LOG_ERROR(HW_GPU, "Unknown alpha combiner operation %d\n", (int)op);
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UNIMPLEMENTED();
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UNIMPLEMENTED();
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