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[dxgi] Always use 32-bit depth buffers instead of 24-bit 

Support for 24-bit depth buffers seems poor even on GPUs which support
them, and there seem to be no issues with using 32-bit buffers in practice.
This commit is contained in:
Philip Rebohle 2018-03-22 11:09:23 +01:00
parent 53d557c2db
commit 5eedbc0546
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GPG Key ID: C8CC613427A31C99
2 changed files with 5 additions and 25 deletions
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26
src/dxgi/dxgi_adapter.cpp
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@ -406,27 +406,11 @@ namespace dxvk {
AddDepthFormat (DXGI_FORMAT_X32_TYPELESS_G8X24_UINT, VK_FORMAT_D32_SFLOAT_S8_UINT, VK_IMAGE_ASPECT_STENCIL_BIT);
// Vulkan implementations are not required to support 24-bit depth buffers natively
// and AMD decided to not implement them, so we'll fall back to 32-bit depth buffers
if (HasFormatSupport(VK_FORMAT_D24_UNORM_S8_UINT, VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT)) {
AddDepthFormatTypeless(DXGI_FORMAT_R24G8_TYPELESS, VK_FORMAT_D24_UNORM_S8_UINT);
AddDepthFormat (DXGI_FORMAT_D24_UNORM_S8_UINT, VK_FORMAT_D24_UNORM_S8_UINT, 0);
AddDepthFormat (DXGI_FORMAT_R24_UNORM_X8_TYPELESS, VK_FORMAT_D24_UNORM_S8_UINT, VK_IMAGE_ASPECT_DEPTH_BIT);
AddDepthFormat (DXGI_FORMAT_X24_TYPELESS_G8_UINT, VK_FORMAT_D24_UNORM_S8_UINT, VK_IMAGE_ASPECT_STENCIL_BIT);
} else {
Logger::warn("DxgiAdapter: DXGI_FORMAT_D24_UNORM_S8_UINT -> VK_FORMAT_D32_SFLOAT_S8_UINT");
AddDepthFormatTypeless(DXGI_FORMAT_R24G8_TYPELESS, VK_FORMAT_D32_SFLOAT_S8_UINT);
AddDepthFormat (DXGI_FORMAT_R24_UNORM_X8_TYPELESS, VK_FORMAT_D32_SFLOAT_S8_UINT, VK_IMAGE_ASPECT_DEPTH_BIT);
AddDepthFormat (DXGI_FORMAT_X24_TYPELESS_G8_UINT, VK_FORMAT_D32_SFLOAT_S8_UINT, VK_IMAGE_ASPECT_STENCIL_BIT);
AddDepthFormat (DXGI_FORMAT_D24_UNORM_S8_UINT, VK_FORMAT_D32_SFLOAT_S8_UINT, 0);
}
}
bool DxgiAdapter::HasFormatSupport(
VkFormat format,
VkFormatFeatureFlags features) const {
const VkFormatProperties info = m_adapter->formatProperties(format);
return ((info.optimalTilingFeatures | info.bufferFeatures) & features) == features;
// and support is generally worse than for 32-bit depth buffers, so we won't use them
AddDepthFormatTypeless(DXGI_FORMAT_R24G8_TYPELESS, VK_FORMAT_D32_SFLOAT_S8_UINT);
AddDepthFormat (DXGI_FORMAT_R24_UNORM_X8_TYPELESS, VK_FORMAT_D32_SFLOAT_S8_UINT, VK_IMAGE_ASPECT_DEPTH_BIT);
AddDepthFormat (DXGI_FORMAT_X24_TYPELESS_G8_UINT, VK_FORMAT_D32_SFLOAT_S8_UINT, VK_IMAGE_ASPECT_STENCIL_BIT);
AddDepthFormat (DXGI_FORMAT_D24_UNORM_S8_UINT, VK_FORMAT_D32_SFLOAT_S8_UINT, 0);
}
}

4
src/dxgi/dxgi_adapter.h
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@ -88,10 +88,6 @@ namespace dxvk {
void SetupFormatTable();
bool HasFormatSupport(
VkFormat format,
VkFormatFeatureFlags features) const;
};
}