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Getting TEV operations working

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wheremyfoodat 2024-02-02 01:16:45 +02:00
parent c13c8046d4
commit 45ae6bd3a8
2 changed files with 150 additions and 0 deletions
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5
include/PICA/shader_gen.hpp
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@ -18,6 +18,11 @@ namespace PICA::ShaderGen {
Language language;
void compileTEV(std::string& shader, int stage, const PICARegs& regs);
void getSource(std::string& shader, PICA::TexEnvConfig::Source source, int index);
void getColorOperand(std::string& shader, PICA::TexEnvConfig::Source source, PICA::TexEnvConfig::ColorOperand color, int index);
void getAlphaOperand(std::string& shader, PICA::TexEnvConfig::Source source, PICA::TexEnvConfig::AlphaOperand alpha, int index);
void getColorOperation(std::string& shader, PICA::TexEnvConfig::Operation op);
void getAlphaOperation(std::string& shader, PICA::TexEnvConfig::Operation op);
public:
FragmentGenerator(API api, Language language) : api(api), language(language) {}

145
src/core/PICA/shader_gen_glsl.cpp
View file

@ -52,10 +52,23 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
tevSources[15] = v_colour; // Previous combiner
)";
ret += R"(
vec3 colorOperand1 = vec3(0.0);
vec3 colorOperand2 = vec3(0.0);
vec3 colorOperand3 = vec3(0.0);
float alphaOperand1 = 0.0;
float alphaOperand2 = 0.0;
float alphaOperand3 = 0.0;
)";
for (int i = 0; i < 6; i++) {
compileTEV(ret, i, regs);
}
ret += "}"; // End of main function
ret += "\n\n\n\n\n\n\n\n\n\n\n\n\n";
return ret;
}
@ -68,4 +81,136 @@ void FragmentGenerator::compileTEV(std::string& shader, int stage, const PICAReg
const u32 ioBase = ioBases[stage];
TexEnvConfig tev(regs[ioBase], regs[ioBase + 1], regs[ioBase + 2], regs[ioBase + 3], regs[ioBase + 4]);
if (!tev.isPassthroughStage()) {
// Get color operands
shader += "colorOp1 = ";
getColorOperand(shader, tev.colorSource1, tev.colorOperand1, stage);
shader += ";\ncolorOp2 = ";
getColorOperand(shader, tev.colorSource2, tev.colorOperand2, stage);
shader += ";\ncolorOp3 = ";
getColorOperand(shader, tev.colorSource3, tev.colorOperand3, stage);
shader += ";\nvec3 outputColor" + std::to_string(stage) + " = vec3(1.0)";
shader += ";\n";
if (tev.colorOp == TexEnvConfig::Operation::Dot3RGBA) {
// Dot3 RGBA also writes to the alpha component so we don't need to do anything more
shader += "float outputAlpha" + std::to_string(stage) + " = colorOutput" + std::to_string(stage) + ".x;\n";
} else {
// Get alpha operands
shader += "alphaOp1 = ";
getAlphaOperand(shader, tev.alphaSource1, tev.alphaOperand1, stage);
shader += ";\nalphaOp2 = ";
getAlphaOperand(shader, tev.alphaSource2, tev.alphaOperand2, stage);
shader += ";\nalphaOp3 = ";
getAlphaOperand(shader, tev.alphaSource3, tev.alphaOperand3, stage);
shader += ";\nvec3 outputAlpha" + std::to_string(stage) + " = 1.0";
shader += ";\n";
}
}
}
void FragmentGenerator::getColorOperand(std::string& shader, TexEnvConfig::Source source, TexEnvConfig::ColorOperand color, int index) {
using OperandType = TexEnvConfig::ColorOperand;
// For inverting operands, add the 1.0 - x subtraction
if (color == OperandType::OneMinusSourceColor || color == OperandType::OneMinusSourceRed || color == OperandType::OneMinusSourceGreen ||
color == OperandType::OneMinusSourceBlue || color == OperandType::OneMinusSourceAlpha) {
shader += "vec3(1.0, 1.0, 1.0) - ";
}
switch (color) {
case OperandType::SourceColor:
case OperandType::OneMinusSourceColor:
getSource(shader, source, index);
shader += ".rgb";
break;
case OperandType::SourceRed:
case OperandType::OneMinusSourceRed:
getSource(shader, source, index);
shader += ".rrr";
break;
case OperandType::SourceGreen:
case OperandType::OneMinusSourceGreen:
getSource(shader, source, index);
shader += ".ggg";
break;
case OperandType::SourceBlue:
case OperandType::OneMinusSourceBlue:
getSource(shader, source, index);
shader += ".bbb";
break;
case OperandType::SourceAlpha:
case OperandType::OneMinusSourceAlpha:
getSource(shader, source, index);
shader += ".aaa";
break;
default:
shader += "vec3(1.0, 1.0, 1.0)";
Helpers::warn("FragmentGenerator: Invalid TEV color operand");
break;
}
}
void FragmentGenerator::getAlphaOperand(std::string& shader, TexEnvConfig::Source source, TexEnvConfig::AlphaOperand color, int index) {
using OperandType = TexEnvConfig::AlphaOperand;
// For inverting operands, add the 1.0 - x subtraction
if (color == OperandType::OneMinusSourceRed || color == OperandType::OneMinusSourceGreen || color == OperandType::OneMinusSourceBlue ||
color == OperandType::OneMinusSourceAlpha) {
shader += "1.0 - ";
}
switch (color) {
case OperandType::SourceRed:
case OperandType::OneMinusSourceRed:
getSource(shader, source, index);
shader += ".r";
break;
case OperandType::SourceGreen:
case OperandType::OneMinusSourceGreen:
getSource(shader, source, index);
shader += ".g";
break;
case OperandType::SourceBlue:
case OperandType::OneMinusSourceBlue:
getSource(shader, source, index);
shader += ".b";
break;
case OperandType::SourceAlpha:
case OperandType::OneMinusSourceAlpha:
getSource(shader, source, index);
shader += ".a";
break;
default:
shader += "1.0";
Helpers::warn("FragmentGenerator: Invalid TEV color operand");
break;
}
}
void FragmentGenerator::getSource(std::string& shader, TexEnvConfig::Source source, int index) {
switch (source) {
case TexEnvConfig::Source::PrimaryColor: shader += "v_colour"; break;
default:
Helpers::warn("Unimplemented TEV source: %d", static_cast<int>(source));
shader += "vec4(1.0, 1.0, 1.0, 1.0)";
break;
}
}