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Merge pull request #1263 from FernandoS27/tex-mode
shader_decompiler: Implemented (Partially) Texture Processing Modes
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commit
cc50857460
@ -254,6 +254,15 @@ enum class TextureQueryType : u64 {
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BorderColor = 22,
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};
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enum class TextureProcessMode : u64 {
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None = 0,
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LZ = 1, // Unknown, appears to be the same as none.
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LB = 2, // Load Bias.
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LL = 3, // Load LOD (LevelOfDetail)
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LBA = 6, // Load Bias. The A is unknown, does not appear to differ with LB
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LLA = 7 // Load LOD. The A is unknown, does not appear to differ with LL
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};
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enum class IpaInterpMode : u64 { Linear = 0, Perspective = 1, Flat = 2, Sc = 3 };
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enum class IpaSampleMode : u64 { Default = 0, Centroid = 1, Offset = 2 };
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@ -573,6 +582,7 @@ union Instruction {
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BitField<28, 1, u64> array;
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BitField<29, 2, TextureType> texture_type;
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BitField<31, 4, u64> component_mask;
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BitField<55, 3, TextureProcessMode> process_mode;
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bool IsComponentEnabled(size_t component) const {
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return ((1ull << component) & component_mask) != 0;
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@ -1853,15 +1853,47 @@ private:
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coord = "vec2 coords = vec2(" + x + ", " + y + ");";
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texture_type = Tegra::Shader::TextureType::Texture2D;
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}
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// TODO: make sure coordinates are always indexed to gpr8 and gpr20 is always bias
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// or lod.
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const std::string op_c = regs.GetRegisterAsFloat(instr.gpr20);
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const std::string sampler = GetSampler(instr.sampler, texture_type, false);
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// Add an extra scope and declare the texture coords inside to prevent
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// overwriting them in case they are used as outputs of the texs instruction.
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shader.AddLine("{");
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++shader.scope;
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shader.AddLine(coord);
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const std::string texture = "texture(" + sampler + ", coords)";
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std::string texture;
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switch (instr.tex.process_mode) {
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case Tegra::Shader::TextureProcessMode::None: {
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texture = "texture(" + sampler + ", coords)";
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break;
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}
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case Tegra::Shader::TextureProcessMode::LZ: {
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texture = "textureLod(" + sampler + ", coords, 0.0)";
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break;
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}
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case Tegra::Shader::TextureProcessMode::LB:
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case Tegra::Shader::TextureProcessMode::LBA: {
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// TODO: Figure if A suffix changes the equation at all.
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texture = "texture(" + sampler + ", coords, " + op_c + ')';
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break;
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}
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case Tegra::Shader::TextureProcessMode::LL:
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case Tegra::Shader::TextureProcessMode::LLA: {
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// TODO: Figure if A suffix changes the equation at all.
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texture = "textureLod(" + sampler + ", coords, " + op_c + ')';
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break;
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}
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default: {
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texture = "texture(" + sampler + ", coords)";
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LOG_CRITICAL(HW_GPU, "Unhandled texture process mode {}",
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static_cast<u32>(instr.tex.process_mode.Value()));
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UNREACHABLE();
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}
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}
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size_t dest_elem{};
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for (size_t elem = 0; elem < 4; ++elem) {
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if (!instr.tex.IsComponentEnabled(elem)) {
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