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MetalDevice: Add support for framebuffer fetch

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This commit is contained in:
Stenzek
2024-04-12 17:21:09 +10:00
parent 42ac79d42a
commit e5a024ba85
5 changed files with 179 additions and 9 deletions
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25
src/util/shadergen.cpp
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@ -123,6 +123,15 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
else if (m_spirv)
ss << "#version 450 core\n\n";
#ifdef __APPLE__
// TODO: Do this for Vulkan as well.
if (m_render_api == RenderAPI::Metal)
{
if (!m_supports_framebuffer_fetch)
ss << "#extension GL_EXT_samplerless_texture_functions : require\n";
}
#endif
#ifdef ENABLE_OPENGL
// Extension enabling for OpenGL.
if (m_render_api == RenderAPI::OpenGL || m_render_api == RenderAPI::OpenGLES)
@ -587,6 +596,22 @@ void ShaderGen::DeclareFragmentEntryPoint(
ss << "layout(input_attachment_index = 0, set = 2, binding = 0) uniform subpassInput u_input_rt;\n";
ss << "#define LAST_FRAG_COLOR subpassLoad(u_input_rt)\n";
}
#endif
#ifdef __APPLE__
if (m_render_api == RenderAPI::Metal)
{
if (m_supports_framebuffer_fetch)
{
// Set doesn't matter, because it's transformed to color0.
ss << "layout(input_attachment_index = 0, set = 2, binding = 0) uniform subpassInput u_input_rt;\n";
ss << "#define LAST_FRAG_COLOR subpassLoad(u_input_rt)\n";
}
else
{
ss << "layout(set = 2, binding = 0) uniform texture2D u_input_rt;\n";
ss << "#define LAST_FRAG_COLOR texelFetch(u_input_rt, int2(gl_FragCoord.xy), 0)\n";
}
}
#endif
}