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VideoCommon: Use coarse derivatives for Manual Texture Sampling if possible

This commit is contained in:
Pokechu22 2021-11-13 20:10:20 -08:00
parent ddf2691395
commit 51e3334526
10 changed files with 37 additions and 4 deletions
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1
Source/Core/VideoBackends/D3D/D3DMain.cpp
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@ -106,6 +106,7 @@ void VideoBackend::FillBackendInfo()
g_Config.backend_info.bSupportsSSAA = true;
g_Config.backend_info.bSupportsShaderBinaries = true;
g_Config.backend_info.bSupportsPipelineCacheData = false;
g_Config.backend_info.bSupportsCoarseDerivatives = true;
g_Config.backend_info.bSupportsLogicOp = D3D::SupportsLogicOp(g_Config.iAdapter);
g_Config.backend_info.Adapters = D3DCommon::GetAdapterNames();

1
Source/Core/VideoBackends/D3D12/VideoBackend.cpp
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@ -82,6 +82,7 @@ void VideoBackend::FillBackendInfo()
g_Config.backend_info.AAModes = DXContext::GetAAModes(g_Config.iAdapter);
g_Config.backend_info.bSupportsShaderBinaries = true;
g_Config.backend_info.bSupportsPipelineCacheData = true;
g_Config.backend_info.bSupportsCoarseDerivatives = true;
// We can only check texture support once we have a device.
if (g_dx_context)

1
Source/Core/VideoBackends/Null/NullBackend.cpp
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@ -55,6 +55,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsPartialDepthCopies = false;
g_Config.backend_info.bSupportsShaderBinaries = false;
g_Config.backend_info.bSupportsPipelineCacheData = false;
g_Config.backend_info.bSupportsCoarseDerivatives = false;
// aamodes: We only support 1 sample, so no MSAA
g_Config.backend_info.Adapters.clear();

3
Source/Core/VideoBackends/OGL/OGLMain.cpp
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@ -99,7 +99,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsGPUTextureDecoding = true;
g_Config.backend_info.bSupportsBBox = true;
// Overwritten in Render.cpp later
// Overwritten in OGLRender.cpp later
g_Config.backend_info.bSupportsDualSourceBlend = true;
g_Config.backend_info.bSupportsPrimitiveRestart = true;
g_Config.backend_info.bSupportsPaletteConversion = true;
@ -107,6 +107,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsDepthClamp = true;
g_Config.backend_info.bSupportsST3CTextures = false;
g_Config.backend_info.bSupportsBPTCTextures = false;
g_Config.backend_info.bSupportsCoarseDerivatives = false;
g_Config.backend_info.Adapters.clear();

2
Source/Core/VideoBackends/OGL/OGLRender.cpp
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@ -483,6 +483,8 @@ Renderer::Renderer(std::unique_ptr<GLContext> main_gl_context, float backbuffer_
GLExtensions::Supports("GL_EXT_texture_compression_s3tc");
g_Config.backend_info.bSupportsBPTCTextures =
GLExtensions::Supports("GL_ARB_texture_compression_bptc");
g_Config.backend_info.bSupportsCoarseDerivatives =
GLExtensions::Supports("GL_ARB_derivative_control") || GLExtensions::Version() >= 450;
if (m_main_gl_context->IsGLES())
{

4
Source/Core/VideoBackends/OGL/ProgramShaderCache.cpp
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@ -747,6 +747,7 @@ void ProgramShaderCache::CreateHeader()
"%s\n" // shader image load store
"%s\n" // shader framebuffer fetch
"%s\n" // shader thread shuffle
"%s\n" // derivative control
// Precision defines for GLSL ES
"%s\n"
@ -826,6 +827,9 @@ void ProgramShaderCache::CreateHeader()
"#extension GL_ARB_shader_image_load_store : enable" :
"",
framebuffer_fetch_string.c_str(), shader_shuffle_string.c_str(),
g_ActiveConfig.backend_info.bSupportsCoarseDerivatives ?
"#extension GL_ARB_derivative_control : enable" :
"",
is_glsles ? "precision highp float;" : "", is_glsles ? "precision highp int;" : "",
is_glsles ? "precision highp sampler2DArray;" : "",
(is_glsles && g_ActiveConfig.backend_info.bSupportsPaletteConversion) ?

1
Source/Core/VideoBackends/Software/SWmain.cpp
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@ -84,6 +84,7 @@ void VideoSoftware::InitBackendInfo()
g_Config.backend_info.bSupportsShaderBinaries = false;
g_Config.backend_info.bSupportsPipelineCacheData = false;
g_Config.backend_info.bSupportsBBox = true;
g_Config.backend_info.bSupportsCoarseDerivatives = false;
// aamodes
g_Config.backend_info.AAModes = {1};

1
Source/Core/VideoBackends/Vulkan/VulkanContext.cpp
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@ -286,6 +286,7 @@ void VulkanContext::PopulateBackendInfo(VideoConfig* config)
config->backend_info.bSupportsLogicOp = false; // Dependent on features.
config->backend_info.bSupportsLargePoints = false; // Dependent on features.
config->backend_info.bSupportsFramebufferFetch = false; // No support.
config->backend_info.bSupportsCoarseDerivatives = true; // Assumed support.
}
void VulkanContext::PopulateBackendInfoAdapters(VideoConfig* config, const GPUList& gpu_list)

24
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -628,15 +628,35 @@ uint WrapCoord(int coord, uint wrap, int size) {{
BitfieldExtract<&SamplerState::TM1::max_lod>("texmode1"));
if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
{
if (g_ActiveConfig.backend_info.bSupportsCoarseDerivatives)
{
// The software renderer uses the equivalent of coarse derivatives, so use them here for
// consistency. This hasn't been hardware tested.
// Note that bSupportsCoarseDerivatives being false only means dFdxCoarse and dFdxFine don't
// exist. The GPU may still implement dFdx using coarse derivatives; we just don't have the
// ability to specifically require it.
out.Write(R"(
float2 uv_delta_x = abs(dFdxCoarse(float2(uv)));
float2 uv_delta_y = abs(dFdyCoarse(float2(uv)));
)");
}
else
{
out.Write(R"(
float2 uv_delta_x = abs(dFdx(float2(uv)));
float2 uv_delta_y = abs(dFdy(float2(uv)));
)");
}
}
else if (api_type == APIType::D3D)
{
ASSERT(g_ActiveConfig.backend_info.bSupportsCoarseDerivatives);
out.Write(R"(
float2 uv_delta_x = abs(ddx(float2(uv)));
float2 uv_delta_y = abs(ddy(float2(uv)));
float2 uv_delta_x = abs(ddx_coarse(float2(uv)));
float2 uv_delta_y = abs(ddy_coarse(float2(uv)));
)");
}
// TODO: LOD bias is normally S2.5 (Dolphin uses S7.8 for arbitrary mipmap detection and higher
// IRs), but (at least per the software renderer) actual LOD is S28.4. How does this work?

1
Source/Core/VideoCommon/VideoConfig.h
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@ -230,6 +230,7 @@ struct VideoConfig final
bool bSupportsDepthReadback = false;
bool bSupportsShaderBinaries = false;
bool bSupportsPipelineCacheData = false;
bool bSupportsCoarseDerivatives = false;
} backend_info;
// Utility