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GPUDevice: Add support for feedback loops

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This commit is contained in:
Stenzek
2024-03-08 17:55:02 +10:00
parent cc5f9a12b1
commit 72ab669e70
23 changed files with 426 additions and 191 deletions
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35
src/util/shadergen.cpp
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@ -505,7 +505,7 @@ void ShaderGen::DeclareFragmentEntryPoint(
const std::initializer_list<std::pair<const char*, const char*>>& additional_inputs,
bool declare_fragcoord /* = false */, u32 num_color_outputs /* = 1 */, bool depth_output /* = false */,
bool msaa /* = false */, bool ssaa /* = false */, bool declare_sample_id /* = false */,
bool noperspective_color /* = false */, bool framebuffer_fetch /* = false */)
bool noperspective_color /* = false */, bool feedback_loop /* = false */)
{
if (m_glsl)
{
@ -560,21 +560,32 @@ void ShaderGen::DeclareFragmentEntryPoint(
ss << "#define o_depth gl_FragDepth\n";
const char* target_0_qualifier = "out";
#ifdef ENABLE_OPENGL
if ((m_render_api == RenderAPI::OpenGL || m_render_api == RenderAPI::OpenGLES) && m_supports_framebuffer_fetch &&
framebuffer_fetch)
if (feedback_loop)
{
if (GLAD_GL_EXT_shader_framebuffer_fetch)
#ifdef ENABLE_OPENGL
if (m_render_api == RenderAPI::OpenGL || m_render_api == RenderAPI::OpenGLES)
{
target_0_qualifier = "inout";
ss << "#define LAST_FRAG_COLOR o_col0\n";
Assert(m_supports_framebuffer_fetch);
if (GLAD_GL_EXT_shader_framebuffer_fetch)
{
target_0_qualifier = "inout";
ss << "#define LAST_FRAG_COLOR o_col0\n";
}
else if (GLAD_GL_ARM_shader_framebuffer_fetch)
{
ss << "#define LAST_FRAG_COLOR gl_LastFragColorARM\n";
}
}
else if (GLAD_GL_ARM_shader_framebuffer_fetch)
{
ss << "#define LAST_FRAG_COLOR gl_LastFragColorARM\n";
}
}
#endif
#ifdef ENABLE_VULKAN
if (m_render_api == RenderAPI::Vulkan)
{
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
}
if (m_use_glsl_binding_layout)
{