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GPUDevice: Support transpiling shaders at compile time

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And use it for GLSL postprocessing shaders.
This commit is contained in:
Stenzek
2024-06-14 14:37:33 +10:00
parent f0c2832d03
commit ef69c31e9f
37 changed files with 918 additions and 470 deletions
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81
src/util/shadergen.cpp
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@ -17,39 +17,66 @@
Log_SetChannel(ShaderGen);
ShaderGen::ShaderGen(RenderAPI render_api, bool supports_dual_source_blend, bool supports_framebuffer_fetch)
: m_render_api(render_api), m_glsl(render_api != RenderAPI::D3D11 && render_api != RenderAPI::D3D12),
m_spirv(render_api == RenderAPI::Vulkan || render_api == RenderAPI::Metal),
m_supports_dual_source_blend(supports_dual_source_blend), m_supports_framebuffer_fetch(supports_framebuffer_fetch),
m_use_glsl_interface_blocks(false)
ShaderGen::ShaderGen(RenderAPI render_api, GPUShaderLanguage shader_language, bool supports_dual_source_blend,
bool supports_framebuffer_fetch)
: m_render_api(render_api), m_shader_language(shader_language),
m_glsl(shader_language == GPUShaderLanguage::GLSL || shader_language == GPUShaderLanguage::GLSLES ||
shader_language == GPUShaderLanguage::GLSLVK),
m_spirv(shader_language == GPUShaderLanguage::GLSLVK), m_supports_dual_source_blend(supports_dual_source_blend),
m_supports_framebuffer_fetch(supports_framebuffer_fetch), m_use_glsl_interface_blocks(false)
{
#if defined(ENABLE_OPENGL) || defined(ENABLE_VULKAN) || defined(__APPLE__)
if (m_glsl)
{
#ifdef ENABLE_OPENGL
if (m_render_api == RenderAPI::OpenGL || m_render_api == RenderAPI::OpenGLES)
m_glsl_version_string = GetGLSLVersionString(m_render_api);
m_glsl_version_string = GetGLSLVersionString(m_render_api, GetGLSLVersion(render_api));
m_use_glsl_interface_blocks = (IsVulkan() || IsMetal() || GLAD_GL_ES_VERSION_3_2 || GLAD_GL_VERSION_3_2);
m_use_glsl_binding_layout = (IsVulkan() || IsMetal() || UseGLSLBindingLayout());
m_use_glsl_interface_blocks =
(shader_language == GPUShaderLanguage::GLSLVK || GLAD_GL_ES_VERSION_3_2 || GLAD_GL_VERSION_3_2);
m_use_glsl_binding_layout = (shader_language == GPUShaderLanguage::GLSLVK || UseGLSLBindingLayout());
if (m_render_api == RenderAPI::OpenGL)
#ifdef _WIN32
if (m_shader_language == GPUShaderLanguage::GLSL)
{
// SSAA with interface blocks is broken on AMD's OpenGL driver.
const char* gl_vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
if (std::strcmp(gl_vendor, "ATI Technologies Inc.") == 0)
m_use_glsl_interface_blocks = false;
}
#endif
#else
m_use_glsl_interface_blocks = true;
m_use_glsl_binding_layout = true;
#endif
}
#endif
}
ShaderGen::~ShaderGen() = default;
GPUShaderLanguage ShaderGen::GetShaderLanguageForAPI(RenderAPI api)
{
switch (api)
{
case RenderAPI::D3D11:
case RenderAPI::D3D12:
return GPUShaderLanguage::HLSL;
case RenderAPI::Vulkan:
case RenderAPI::Metal:
return GPUShaderLanguage::GLSLVK;
case RenderAPI::OpenGL:
return GPUShaderLanguage::GLSL;
case RenderAPI::OpenGLES:
return GPUShaderLanguage::GLSLES;
case RenderAPI::None:
default:
return GPUShaderLanguage::None;
}
}
bool ShaderGen::UseGLSLBindingLayout()
{
#ifdef ENABLE_OPENGL
@ -72,7 +99,7 @@ void ShaderGen::DefineMacro(std::stringstream& ss, const char* name, s32 value)
}
#ifdef ENABLE_OPENGL
TinyString ShaderGen::GetGLSLVersionString(RenderAPI render_api)
u32 ShaderGen::GetGLSLVersion(RenderAPI render_api)
{
const char* glsl_version = reinterpret_cast<const char*>(glGetString(GL_SHADING_LANGUAGE_VERSION));
const bool glsl_es = (render_api == RenderAPI::OpenGLES);
@ -108,6 +135,15 @@ TinyString ShaderGen::GetGLSLVersionString(RenderAPI render_api)
}
}
return (static_cast<u32>(major_version) * 100) + static_cast<u32>(minor_version);
}
TinyString ShaderGen::GetGLSLVersionString(RenderAPI render_api, u32 version)
{
const bool glsl_es = (render_api == RenderAPI::OpenGLES);
const u32 major_version = (version / 100);
const u32 minor_version = (version % 100);
return TinyString::from_format("#version {}{:02d}{}", major_version, minor_version,
(glsl_es && major_version >= 3) ? " es" : "");
}
@ -115,7 +151,7 @@ TinyString ShaderGen::GetGLSLVersionString(RenderAPI render_api)
void ShaderGen::WriteHeader(std::stringstream& ss)
{
if (m_render_api == RenderAPI::OpenGL || m_render_api == RenderAPI::OpenGLES)
if (m_shader_language == GPUShaderLanguage::GLSL || m_shader_language == GPUShaderLanguage::GLSLES)
ss << m_glsl_version_string << "\n\n";
else if (m_spirv)
ss << "#version 450 core\n\n";
@ -131,7 +167,7 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
#ifdef ENABLE_OPENGL
// Extension enabling for OpenGL.
if (m_render_api == RenderAPI::OpenGL || m_render_api == RenderAPI::OpenGLES)
if (m_shader_language == GPUShaderLanguage::GLSL || m_shader_language == GPUShaderLanguage::GLSLES)
{
if (GLAD_GL_EXT_shader_framebuffer_fetch)
ss << "#extension GL_EXT_shader_framebuffer_fetch : require\n";
@ -139,7 +175,7 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
ss << "#extension GL_ARM_shader_framebuffer_fetch : require\n";
}
if (m_render_api == RenderAPI::OpenGLES)
if (m_shader_language == GPUShaderLanguage::GLSLES)
{
// Enable EXT_blend_func_extended for dual-source blend on OpenGL ES.
if (GLAD_GL_EXT_blend_func_extended)
@ -158,7 +194,7 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
ss << "#define DRIVER_POWERVR 1\n";
}
}
else if (m_render_api == RenderAPI::OpenGL)
else if (m_shader_language == GPUShaderLanguage::GLSL)
{
// Need extensions for binding layout if GL<4.3.
if (m_use_glsl_binding_layout && !GLAD_GL_VERSION_4_3)
@ -185,7 +221,7 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
DefineMacro(ss, "API_METAL", m_render_api == RenderAPI::Metal);
#ifdef ENABLE_OPENGL
if (m_render_api == RenderAPI::OpenGLES)
if (m_shader_language == GPUShaderLanguage::GLSLES)
{
ss << "precision highp float;\n";
ss << "precision highp int;\n";
@ -299,9 +335,9 @@ void ShaderGen::WriteHeader(std::stringstream& ss)
void ShaderGen::WriteUniformBufferDeclaration(std::stringstream& ss, bool push_constant_on_vulkan)
{
if (IsVulkan())
if (m_shader_language == GPUShaderLanguage::GLSLVK)
{
if (push_constant_on_vulkan)
if (m_render_api == RenderAPI::Vulkan && push_constant_on_vulkan)
{
ss << "layout(push_constant) uniform PushConstants\n";
}
@ -311,15 +347,10 @@ void ShaderGen::WriteUniformBufferDeclaration(std::stringstream& ss, bool push_c
m_has_uniform_buffer = true;
}
}
else if (IsMetal())
{
ss << "layout(std140, set = 0, binding = 0) uniform UBOBlock\n";
m_has_uniform_buffer = true;
}
else if (m_glsl)
{
if (m_use_glsl_binding_layout)
ss << "layout(std140, binding = 1) uniform UBOBlock\n";
ss << "layout(std140, binding = 0) uniform UBOBlock\n";
else
ss << "layout(std140) uniform UBOBlock\n";