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GPU/HW: Expose depth buffer to internal postprocessing

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This commit is contained in:
Stenzek
2024-03-24 19:49:16 +10:00
parent e39a2d00bf
commit 34d5cdec96
14 changed files with 288 additions and 85 deletions
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34
src/core/gpu_hw_shadergen.cpp
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@ -1031,16 +1031,19 @@ float3 ApplyDebanding(float2 frag_coord)
return ss.str();
}
std::string GPU_HW_ShaderGen::GenerateVRAMExtractFragmentShader(bool depth_24bit)
std::string GPU_HW_ShaderGen::GenerateVRAMExtractFragmentShader(bool color_24bit, bool depth_buffer)
{
std::stringstream ss;
WriteHeader(ss);
DefineMacro(ss, "DEPTH_24BIT", depth_24bit);
DefineMacro(ss, "COLOR_24BIT", color_24bit);
DefineMacro(ss, "DEPTH_BUFFER", depth_buffer);
DefineMacro(ss, "MULTISAMPLED", UsingMSAA());
WriteCommonFunctions(ss);
DeclareUniformBuffer(ss, {"uint2 u_vram_offset", "uint u_skip_x", "uint u_line_skip"}, true);
DeclareTexture(ss, "samp0", 0, UsingMSAA());
if (depth_buffer)
DeclareTexture(ss, "samp1", 1, UsingMSAA());
ss << R"(
float4 LoadVRAM(int2 coords)
@ -1056,6 +1059,22 @@ float4 LoadVRAM(int2 coords)
#endif
}
#if DEPTH_BUFFER
float LoadDepth(int2 coords)
{
// Need to duplicate because different types in different languages...
#if MULTISAMPLING
float value = LOAD_TEXTURE_MS(samp1, coords, 0u).r;
FOR_UNROLL (uint sample_index = 1u; sample_index < MULTISAMPLES; sample_index++)
value += LOAD_TEXTURE_MS(samp1, coords, sample_index).r;
value /= float(MULTISAMPLES);
return value;
#else
return LOAD_TEXTURE(samp1, coords, 0).r;
#endif
}
#endif
float3 SampleVRAM24(uint2 icoords)
{
// load adjacent 16-bit texels
@ -1075,15 +1094,20 @@ float3 SampleVRAM24(uint2 icoords)
}
)";
DeclareFragmentEntryPoint(ss, 0, 1, {}, true, 1);
DeclareFragmentEntryPoint(ss, 0, 1, {}, true, depth_buffer ? 2 : 1);
ss << R"(
{
uint2 icoords = uint2(uint(v_pos.x) + u_skip_x, uint(v_pos.y) << u_line_skip);
int2 wrapped_coords = int2((icoords + u_vram_offset) % VRAM_SIZE);
#if DEPTH_24BIT
#if COLOR_24BIT
o_col0 = float4(SampleVRAM24(icoords), 1.0);
#else
o_col0 = float4(LoadVRAM(int2((icoords + u_vram_offset) % VRAM_SIZE)).rgb, 1.0);
o_col0 = float4(LoadVRAM(wrapped_coords).rgb, 1.0);
#endif
#if DEPTH_BUFFER
o_col1 = float4(LoadDepth(wrapped_coords), 0.0, 0.0, 0.0);
#endif
}
)";