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Add more blend equations from 3dbrew
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c4e636681e
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@ -339,6 +339,10 @@ struct Regs {
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union {
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enum BlendEquation : u32 {
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Add = 0,
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Subtract = 1,
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ReverseSubtract = 2,
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Min = 3,
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Max = 4
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};
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enum BlendFactor : u32 {
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@ -617,10 +617,13 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
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auto dstfactor = Math::MakeVec(LookupFactorRGB(params.factor_dest_rgb),
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LookupFactorA(params.factor_dest_a));
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auto src_result = (combiner_output * srcfactor).Cast<int>();
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auto dst_result = (dest * dstfactor).Cast<int>();
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switch (params.blend_equation_rgb) {
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case params.Add:
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{
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auto result = (combiner_output * srcfactor + dest * dstfactor) / 255;
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auto result = (src_result + dst_result) / 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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@ -628,6 +631,46 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
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break;
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}
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case params.Subtract:
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{
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auto result = (src_result - dst_result) / 255;
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result.r() = std::max(0, result.r());
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result.g() = std::max(0, result.g());
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result.b() = std::max(0, result.b());
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combiner_output = result.Cast<u8>();
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break;
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}
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case params.ReverseSubtract:
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{
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auto result = (dst_result - src_result) / 255;
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result.r() = std::max(0, result.r());
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result.g() = std::max(0, result.g());
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result.b() = std::max(0, result.b());
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combiner_output = result.Cast<u8>();
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break;
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}
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case params.Min:
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{
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Math::Vec4<int> result;
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result.r() = std::min(src_result.r(),dst_result.r());
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result.g() = std::min(src_result.g(),dst_result.g());
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result.b() = std::min(src_result.b(),dst_result.b());
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combiner_output = result.Cast<u8>();
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break;
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}
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case params.Max:
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{
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Math::Vec4<int> result;
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result.r() = std::max(src_result.r(),dst_result.r());
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result.g() = std::max(src_result.g(),dst_result.g());
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result.b() = std::max(src_result.b(),dst_result.b());
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combiner_output = result.Cast<u8>();
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break;
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}
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default:
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LOG_CRITICAL(HW_GPU, "Unknown RGB blend equation %x", params.blend_equation_rgb.Value());
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exit(0);
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