bSupportsGen5TemporalAA

bSupportsGen5TemporalAA

#Overview

name: bSupportsGen5TemporalAA

The value of this variable can be defined or overridden in .ini config files. 6 .ini config files referencing this setting variable.

It is referenced in 4 C++ source files.

#Summary

#Usage in the C++ source code

The purpose of bSupportsGen5TemporalAA is to indicate whether a specific shader platform supports Generation 5 Temporal Anti-Aliasing (TAA). This setting is related to the rendering system, specifically for advanced anti-aliasing techniques.

This setting variable is primarily used within the RHI (Rendering Hardware Interface) module of Unreal Engine. It’s part of the data-driven shader platform information system, which allows the engine to handle different graphics capabilities across various platforms and hardware.

The value of this variable is set through the data-driven shader platform info parsing system, as seen in the ParseDataDrivenShaderInfo function. It’s likely populated from a configuration file or platform-specific data source.

bSupportsGen5TemporalAA interacts with other shader platform capabilities and is used alongside other feature flags like bSupportsInlineRayTracing, bSupportsRayTracingShaders, and bSupportsMeshShaders.

Developers must be aware that this variable is platform-specific and may affect the availability of certain rendering features or techniques. It’s crucial to check this value before attempting to use Gen5 Temporal AA in rendering code.

Best practices when using this variable include:

1. Always check its value using the provided GetSupportsGen5TemporalAA function before enabling Gen5 TAA features.
2. Consider providing fallback rendering paths for platforms that don’t support Gen5 TAA.
3. Use this information to optimize rendering pipelines and shader compilation for different platforms.
4. Keep in mind that this is part of a larger set of platform capabilities, so it should be considered alongside other relevant features when making rendering decisions.

#Setting Variables

#References In INI files

Location: <Workspace>/Engine/Config/Mac/DataDrivenPlatformInfo.ini:35, section: [ShaderPlatform METAL_SM5]

• INI Section: ShaderPlatform METAL_SM5
• Raw value: true
• Is Array: False

Location: <Workspace>/Engine/Config/Mac/DataDrivenPlatformInfo.ini:75, section: [ShaderPlatform METAL_SM6]

• INI Section: ShaderPlatform METAL_SM6
• Raw value: true
• Is Array: False

Location: <Workspace>/Engine/Config/VulkanPC/DataDrivenPlatformInfo.ini:109, section: [ShaderPlatform VULKAN_SM5]

• INI Section: ShaderPlatform VULKAN_SM5
• Raw value: true
• Is Array: False

Location: <Workspace>/Engine/Config/VulkanPC/DataDrivenPlatformInfo.ini:228, section: [ShaderPlatform VULKAN_SM6]

• INI Section: ShaderPlatform VULKAN_SM6
• Raw value: true
• Is Array: False

Location: <Workspace>/Engine/Config/Windows/DataDrivenPlatformInfo.ini:60, section: [ShaderPlatform PCD3D_SM5]

• INI Section: ShaderPlatform PCD3D_SM5
• Raw value: true
• Is Array: False

Location: <Workspace>/Engine/Config/Windows/DataDrivenPlatformInfo.ini:117, section: [ShaderPlatform PCD3D_SM6]

• INI Section: ShaderPlatform PCD3D_SM6
• Raw value: true
• Is Array: False

#References in C++ code

#Callsites

This variable is referenced in the following C++ source code:

#Loc: <Workspace>/Engine/Source/Runtime/RHI/Private/DataDrivenShaderPlatformInfo.cpp:245

Scope (from outer to inner):

file
function     void FGenericDataDrivenShaderPlatformInfo::ParseDataDrivenShaderInfo

Source code excerpt:

	GET_SECTION_INT_HELPER(MaximumWaveSize);
	GET_SECTION_BOOL_HELPER(bRequiresExplicit128bitRT);
	GET_SECTION_BOOL_HELPER(bSupportsGen5TemporalAA);
	GET_SECTION_BOOL_HELPER(bTargetsTiledGPU);
	GET_SECTION_BOOL_HELPER(bNeedsOfflineCompiler);
	GET_SECTION_BOOL_HELPER(bSupportsComputeFramework);
	GET_SECTION_BOOL_HELPER(bSupportsAnisotropicMaterials);
	GET_SECTION_BOOL_HELPER(bSupportsDualSourceBlending);
	GET_SECTION_BOOL_HELPER(bRequiresGeneratePrevTransformBuffer);

#Loc: <Workspace>/Engine/Source/Runtime/RHI/Private/DataDrivenShaderPlatformInfo.cpp:461

Scope (from outer to inner):

file
function     void FGenericDataDrivenShaderPlatformInfo::UpdatePreviewPlatforms

Source code excerpt:

				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsPrimitiveShaders);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsUInt64ImageAtomics);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsGen5TemporalAA);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsInlineRayTracing);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsRayTracingShaders);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsMeshShadersTier0);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsMeshShadersTier1);
				PREVIEW_DISABLE_IF_RUNTIME_UNSUPPORTED(bSupportsMobileMultiView);

#Loc: <Workspace>/Engine/Source/Runtime/RHI/Public/DataDrivenShaderPlatformInfo.h:69

Scope (from outer to inner):

file
class        class FGenericDataDrivenShaderPlatformInfo

Source code excerpt:

	uint32 bSupportsConservativeRasterization : 1;
	uint32 bRequiresExplicit128bitRT : 1;
	uint32 bSupportsGen5TemporalAA : 1;
	uint32 bTargetsTiledGPU : 1;
	uint32 bNeedsOfflineCompiler : 1;
	uint32 bSupportsComputeFramework : 1;
	uint32 bSupportsAnisotropicMaterials : 1;
	uint32 bSupportsDualSourceBlending : 1;
	uint32 bRequiresGeneratePrevTransformBuffer : 1;

#Loc: <Workspace>/Engine/Source/Runtime/RHI/Public/DataDrivenShaderPlatformInfo.h:521

Scope (from outer to inner):

file
class        class FGenericDataDrivenShaderPlatformInfo
function     static const bool GetSupportsGen5TemporalAA

Source code excerpt:

	{
		check(IsValid(Platform));
		return Infos[Platform].bSupportsGen5TemporalAA;
	}

	static FORCEINLINE_DEBUGGABLE const bool GetSupportsDualSourceBlending(const FStaticShaderPlatform Platform)
	{
		check(IsValid(Platform));
		return Infos[Platform].bSupportsDualSourceBlending;