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shader: Better but still partial interpolation support
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@ -141,14 +141,16 @@ void TranslatorVisitor::IPA(u64 insn) {
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const IR::Attribute attribute{ipa.attribute};
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IR::F32 value{ir.GetAttribute(attribute)};
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if (IR::IsGeneric(attribute)) {
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// const bool is_perspective{UnimplementedReadHeader(GenericAttributeIndex(attribute))};
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const bool is_perspective{false};
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const ProgramHeader& sph{env.SPH()};
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const u32 attr_index{IR::GenericAttributeIndex(attribute)};
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const u32 element{static_cast<u32>(attribute) % 4};
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const std::array input_map{sph.ps.GenericInputMap(attr_index)};
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const bool is_perspective{input_map[element] == Shader::PixelImap::Perspective};
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if (is_perspective) {
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const IR::F32 rcp_position_w{ir.FPRecip(ir.GetAttribute(IR::Attribute::PositionW))};
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value = ir.FPMul(value, rcp_position_w);
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const IR::F32 position_w{ir.GetAttribute(IR::Attribute::PositionW)};
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value = ir.FPMul(value, position_w);
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}
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}
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switch (ipa.interpolation_mode) {
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case InterpolationMode::Pass:
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break;
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