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TEV definitions for shader generator

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wheremyfoodat 2024-01-18 02:59:29 +02:00
parent 6f3c7d358b
commit ef2467bc60
5 changed files with 152 additions and 1 deletions
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41
src/core/PICA/shader_gen_glsl.cpp
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@ -1,4 +1,5 @@
#include "PICA/shader_gen.hpp"
using namespace PICA;
using namespace PICA::ShaderGen;
std::string FragmentGenerator::generate(const PICARegs& regs) {
@ -10,6 +11,8 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
default: break;
}
bool unimplementedFlag = false;
// Input and output attributes
ret += R"(
in vec3 v_tangent;
@ -24,7 +27,45 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
flat in vec4 v_textureEnvBufferColor;
out vec4 fragColour;
uniform sampler2D u_tex0;
uniform sampler2D u_tex1;
uniform sampler2D u_tex2;
uniform sampler1DArray u_tex_lighting_lut;
vec4 tevSources[16];
vec4 tevNextPreviousBuffer;
vec3 regToColor(uint reg) {
// Normalization scale to convert from [0...255] to [0.0...1.0]
const float scale = 1.0 / 255.0;
return scale * vec3(float(bitfieldExtract(reg, 20, 8)), float(bitfieldExtract(reg, 10, 8)), float(bitfieldExtract(reg, 00, 8)));
}
)";
// Emit main function for fragment shader
// When not initialized, source 13 is set to vec4(0.0) and 15 is set to the vertex colour
ret += R"(
void main() {
tevSources[0] = v_colour;
tevSources[13] = vec4(0.0); // Previous buffer colour
tevSources[15] = v_colour; // Previous combiner
)";
for (int i = 0; i < 6; i++) {
compileTEV(ret, i, regs);
}
return ret;
}
void FragmentGenerator::compileTEV(std::string& shader, int stage, const PICARegs& regs) {
// Base address for each TEV stage's configuration
static constexpr std::array<u32, 6> ioBases = {
InternalRegs::TexEnv0Source, InternalRegs::TexEnv1Source, InternalRegs::TexEnv2Source,
InternalRegs::TexEnv3Source, InternalRegs::TexEnv4Source, InternalRegs::TexEnv5Source,
};
const u32 ioBase = ioBases[stage];
TexEnvConfig tev(regs[ioBase], regs[ioBase + 1], regs[ioBase + 2], regs[ioBase + 3], regs[ioBase + 4]);
}