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Shader recompiler: Add depth mapping

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wheremyfoodat 2024-07-15 04:30:04 +03:00
parent c8eb1c1128
commit 0878474e01
4 changed files with 27 additions and 4 deletions
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15
src/core/PICA/shader_gen_glsl.cpp
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@ -113,6 +113,8 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
layout(std140) uniform FragmentUniforms {
int alphaReference;
float depthScale;
float depthOffset;
vec4 constantColors[6];
vec4 tevBufferColor;
@ -138,6 +140,19 @@ std::string FragmentGenerator::generate(const PICARegs& regs) {
float alphaOp3 = 0.0;
)";
ret += R"(
// Get original depth value by converting from [near, far] = [0, 1] to [-1, 1]
// We do this by converting to [0, 2] first and subtracting 1 to go to [-1, 1]
float z_over_w = gl_FragCoord.z * 2.0f - 1.0f;
float depth = z_over_w * depthScale + depthOffset;
)";
if ((regs[InternalRegs::DepthmapEnable] & 1) == 0) {
ret += "depth /= gl_FragCoord.w;\n";
}
ret += "gl_FragDepth = depth;\n";
textureConfig = regs[InternalRegs::TexUnitCfg];
for (int i = 0; i < 6; i++) {
compileTEV(ret, i, regs);