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Simplify TEV code

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wheremyfoodat 2024-07-15 15:38:15 +03:00
parent 2cd50e7f37
commit a2649ffb76
1 changed files with 15 additions and 16 deletions
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31
src/core/PICA/shader_gen_glsl.cpp
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@ -57,7 +57,6 @@ std::string FragmentGenerator::getVertexShader(const PICARegs& regs) {
vec4 colourAbs = abs(a_vertexColour);
v_colour = min(colourAbs, vec4(1.f));
// Flip y axis of UVs because OpenGL uses an inverted y for texture sampling compared to the PICA
v_texcoord0 = vec3(a_texcoord0.x, 1.0 - a_texcoord0.y, a_texcoord0_w);
v_texcoord1 = vec2(a_texcoord1.x, 1.0 - a_texcoord1.y);
v_texcoord2 = vec2(a_texcoord2.x, 1.0 - a_texcoord2.y);
@ -125,8 +124,8 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
// When not initialized, source 13 is set to vec4(0.0) and 15 is set to the vertex colour
ret += R"(
void main() {
vec4 combinerOutput = v_colour; // Last TEV output
vec4 previousBuffer = vec4(0.0); // Previous buffer
vec4 combinerOutput = v_colour;
vec4 previousBuffer = vec4(0.0);
vec4 tevNextPreviousBuffer = tevBufferColor;
)";
@ -162,7 +161,7 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
ret += "fragColor = combinerOutput;\n";
ret += "}"; // End of main function
ret += "\n\n\n\n\n\n\n\n\n\n";
ret += "\n\n\n\n\n\n\n";
return ret;
}
@ -188,9 +187,9 @@ void FragmentGenerator::compileTEV(std::string& shader, int stage, const PICAReg
shader += ";\ncolorOp3 = ";
getColorOperand(shader, tev.colorSource3, tev.colorOperand3, stage);
shader += ";\nvec3 outputColor" + std::to_string(stage) + " = ";
shader += ";\nvec3 outputColor" + std::to_string(stage) + " = clamp(";
getColorOperation(shader, tev.colorOp);
shader += ";\n";
shader += ", vec3(0.0), vec3(1.0));\n";
if (tev.colorOp == TexEnvConfig::Operation::Dot3RGBA) {
// Dot3 RGBA also writes to the alpha component so we don't need to do anything more
@ -206,10 +205,10 @@ void FragmentGenerator::compileTEV(std::string& shader, int stage, const PICAReg
shader += ";\nalphaOp3 = ";
getAlphaOperand(shader, tev.alphaSource3, tev.alphaOperand3, stage);
shader += ";\nfloat outputAlpha" + std::to_string(stage) + " = ";
shader += ";\nfloat outputAlpha" + std::to_string(stage) + " = clamp(";
getAlphaOperation(shader, tev.alphaOp);
// Clamp the alpha value to [0.0, 1.0]
shader += ";\nclamp(outputAlpha" + std::to_string(stage) + ", 0.0, 1.0);\n";
shader += ", 0.0, 1.0);\n";
}
shader += "combinerOutput = vec4(clamp(outputColor" + std::to_string(stage) + " * " + std::to_string(tev.getColorScale()) +
@ -356,15 +355,15 @@ void FragmentGenerator::getColorOperation(std::string& shader, TexEnvConfig::Ope
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::AddSigned: shader += "colorOp1 + colorOp2 - vec3(0.5)"; 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 * (vec3(1.0) - colorOp3)"; break;
case TexEnvConfig::Operation::Lerp: shader += "mix(colorOp2, colorOp1, 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::AddMultiply: shader += "min(colorOp1 + colorOp2), vec3(1.0)) * colorOp3"; break;
case TexEnvConfig::Operation::MultiplyAdd: shader += "fma(colorOp1, colorOp2, colorOp3)"; break;
case TexEnvConfig::Operation::Dot3RGB:
case TexEnvConfig::Operation::Dot3RGBA: shader += "vec3(4.0 * dot(colorOp1 - 0.5, colorOp2 - 0.5))"; break;
case TexEnvConfig::Operation::Dot3RGBA: shader += "vec3(4.0 * dot(colorOp1 - vec3(0.5), colorOp2 - vec3(0.5)))"; break;
default:
Helpers::warn("FragmentGenerator: Unimplemented color op");
shader += "vec3(1.0)";
@ -376,13 +375,13 @@ void FragmentGenerator::getAlphaOperation(std::string& shader, TexEnvConfig::Ope
switch (op) {
case TexEnvConfig::Operation::Replace: shader += "alphaOp1"; break;
case TexEnvConfig::Operation::Add: shader += "alphaOp1 + alphaOp2"; break;
case TexEnvConfig::Operation::AddSigned: shader += "clamp(alphaOp1 + alphaOp2 - 0.5, 0.0, 1.0);"; break;
case TexEnvConfig::Operation::AddSigned: shader += "alphaOp1 + alphaOp2 - 0.5"; break;
case TexEnvConfig::Operation::Subtract: shader += "alphaOp1 - alphaOp2"; break;
case TexEnvConfig::Operation::Modulate: shader += "alphaOp1 * alphaOp2"; break;
case TexEnvConfig::Operation::Lerp: shader += "alphaOp1 * alphaOp3 + alphaOp2 * (1.0 - alphaOp3)"; break;
case TexEnvConfig::Operation::Lerp: shader += "mix(alphaOp2, alphaOp1, alphaOp3)"; break;
case TexEnvConfig::Operation::AddMultiply: shader += "min(alphaOp1 + alphaOp2, 1.0) * alphaOp3"; break;
case TexEnvConfig::Operation::MultiplyAdd: shader += "alphaOp1 * alphaOp2 + alphaOp3"; break;
case TexEnvConfig::Operation::MultiplyAdd: shader += "fma(alphaOp1, alphaOp2, alphaOp3)"; break;
case TexEnvConfig::Operation::Dot3RGB:
case TexEnvConfig::Operation::Dot3RGBA: shader += "vec3(4.0 * dot(alphaOp1 - 0.5, alphaOp2 - 0.5))"; break;
default: