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Merge pull request #2118 from FernandoS27/ipa-improve

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shader_decompiler: Improve Accuracy of Attribute Interpolation.
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bunnei 2019-02-24 23:04:22 -05:00 • committed by GitHub
commit c07987dfab
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6 changed files with 74 additions and 38 deletions
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2
src/video_core/shader/decode/memory.cpp
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@ -48,7 +48,7 @@ u32 ShaderIR::DecodeMemory(NodeBlock& bb, u32 pc) {
UNIMPLEMENTED_IF_MSG((instr.attribute.fmt20.immediate.Value() % sizeof(u32)) != 0,
"Unaligned attribute loads are not supported");
Tegra::Shader::IpaMode input_mode{Tegra::Shader::IpaInterpMode::Perspective,
Tegra::Shader::IpaMode input_mode{Tegra::Shader::IpaInterpMode::Pass,
Tegra::Shader::IpaSampleMode::Default};
u64 next_element = instr.attribute.fmt20.element;

15
src/video_core/shader/decode/other.cpp
View file

@ -135,7 +135,18 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
instr.ipa.sample_mode.Value()};
const Node attr = GetInputAttribute(attribute.index, attribute.element, input_mode);
const Node value = GetSaturatedFloat(attr, instr.ipa.saturate);
Node value = attr;
const Tegra::Shader::Attribute::Index index = attribute.index.Value();
if (index >= Tegra::Shader::Attribute::Index::Attribute_0 &&
index <= Tegra::Shader::Attribute::Index::Attribute_31) {
// TODO(Blinkhawk): There are cases where a perspective attribute use PASS.
// In theory by setting them as perspective, OpenGL does the perspective correction.
// A way must figured to reverse the last step of it.
if (input_mode.interpolation_mode == Tegra::Shader::IpaInterpMode::Multiply) {
value = Operation(OperationCode::FMul, PRECISE, value, GetRegister(instr.gpr20));
}
}
value = GetSaturatedFloat(value, instr.ipa.saturate);
SetRegister(bb, instr.gpr0, value);
break;
@ -175,4 +186,4 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
return pc;
}
} // namespace VideoCommon::Shader
} // namespace VideoCommon::Shader