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GLSL Fragment Generator: Working color operations

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wheremyfoodat 2024-02-02 01:34:33 +02:00
parent 45ae6bd3a8
commit 7e77af0de8
1 changed files with 22 additions and 1 deletions
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23
src/core/PICA/shader_gen_glsl.cpp
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@ -93,7 +93,8 @@ void FragmentGenerator::compileTEV(std::string& shader, int stage, const PICAReg
shader += ";\ncolorOp3 = "; shader += ";\ncolorOp3 = ";
getColorOperand(shader, tev.colorSource3, tev.colorOperand3, stage); getColorOperand(shader, tev.colorSource3, tev.colorOperand3, stage);
shader += ";\nvec3 outputColor" + std::to_string(stage) + " = vec3(1.0)"; shader += ";\nvec3 outputColor" + std::to_string(stage) + " = ";
getColorOperation(shader, tev.colorOp);
shader += ";\n"; shader += ";\n";
if (tev.colorOp == TexEnvConfig::Operation::Dot3RGBA) { if (tev.colorOp == TexEnvConfig::Operation::Dot3RGBA) {
@ -214,3 +215,23 @@ void FragmentGenerator::getSource(std::string& shader, TexEnvConfig::Source sour
break; break;
} }
} }
void FragmentGenerator::getColorOperation(std::string& shader, TexEnvConfig::Operation op) {
switch (op) {
case TexEnvConfig::Operation::Replace: shader += "colorOp1"; break;
case TexEnvConfig::Operation::Add: shader += "colorOp1 + colorOp2"; break;
case TexEnvConfig::Operation::AddSigned: shader += "clamp(colorOp1 + colorOp2 - 0.5, 0.0, 1.0);"; break;
case TexEnvConfig::Operation::Subtract: shader += "colorOp1 - colorOp2"; break;
case TexEnvConfig::Operation::Modulate: shader += "colorOp1 * colorOp2"; break;
case TexEnvConfig::Operation::Lerp: shader += "colorOp1 * colorOp3 + colorOp2 * (vec(1.0) - colorOp3)"; break;
case TexEnvConfig::Operation::AddMultiply: shader += "min(colorOp1 + colorOp2, vec3(1.0)) * colorOp3"; break;
case TexEnvConfig::Operation::MultiplyAdd: shader += "colorOp1 * colorOp2 + colorOp3"; break;
case TexEnvConfig::Operation::Dot3RGB:
case TexEnvConfig::Operation::Dot3RGBA: shader += "vec3(4.0 * dot(colorOp1 - 0.5, colorOp2 - 0.5))"; break;
default:
Helpers::warn("FragmentGenerator: Unimplemented color op");
shader += "vec3(1.0)";
break;
}
}