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GPU: Add scaling shader support

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Currently only Bilinear (Sharp).
This commit is contained in:
Stenzek
2023-08-31 23:37:17 +10:00
parent 9439cf65a3
commit 09e7a5843f
23 changed files with 370 additions and 219 deletions
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42
src/util/shadergen.cpp
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@ -210,7 +210,8 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
ss << "#define SAMPLE_TEXTURE(name, coords) texture(name, coords)\n";
ss << "#define SAMPLE_TEXTURE_OFFSET(name, coords, offset) textureOffset(name, coords, offset)\n";
ss << "#define SAMPLE_TEXTURE_LEVEL(name, coords, level) textureLod(name, coords, level)\n";
ss << "#define SAMPLE_TEXTURE_LEVEL_OFFSET(name, coords, level, offset) textureLodOffset(name, coords, level, offset)\n";
ss << "#define SAMPLE_TEXTURE_LEVEL_OFFSET(name, coords, level, offset) textureLodOffset(name, coords, level, "
"offset)\n";
ss << "#define LOAD_TEXTURE(name, coords, mip) texelFetch(name, coords, mip)\n";
ss << "#define LOAD_TEXTURE_MS(name, coords, sample) texelFetch(name, coords, int(sample))\n";
ss << "#define LOAD_TEXTURE_OFFSET(name, coords, mip, offset) texelFetchOffset(name, coords, mip, offset)\n";
@ -303,7 +304,6 @@ void ShaderGen::WriteUniformBufferDeclaration(std::stringstream& ss, bool push_c
ss << "cbuffer UBOBlock : register(b0)\n";
m_has_uniform_buffer = true;
}
}
void ShaderGen::DeclareUniformBuffer(std::stringstream& ss, const std::initializer_list<const char*>& members,
@ -680,44 +680,6 @@ std::string ShaderGen::GenerateCopyFragmentShader()
return ss.str();
}
std::string ShaderGen::GenerateDisplayVertexShader()
{
std::stringstream ss;
WriteHeader(ss);
DeclareUniformBuffer(ss, {"float4 u_src_rect"}, true);
DeclareVertexEntryPoint(ss, {}, 0, 1, {}, true);
ss << R"(
{
float2 pos = float2(float((v_id << 1) & 2u), float(v_id & 2u));
v_tex0 = u_src_rect.xy + pos * u_src_rect.zw;
v_pos = float4(pos * float2(2.0f, -2.0f) + float2(-1.0f, 1.0f), 0.0f, 1.0f);
#if API_VULKAN
v_pos.y = -v_pos.y;
#endif
}
)";
return ss.str();
}
std::string ShaderGen::GenerateDisplayFragmentShader(bool set_alpha_to_one /* = false */)
{
std::stringstream ss;
WriteHeader(ss);
DeclareTexture(ss, "samp0", 0);
DeclareFragmentEntryPoint(ss, 0, 1, {}, false, 1);
ss << "{\n";
if (set_alpha_to_one)
ss << "o_col0 = float4(SAMPLE_TEXTURE(samp0, v_tex0).rgb, 1.0f);";
else
ss << "o_col0 = SAMPLE_TEXTURE(samp0, v_tex0);";
ss << "\n}\n";
return ss.str();
}
std::string ShaderGen::GenerateImGuiVertexShader()
{
std::stringstream ss;