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  Type Name Description
Public class FAsyncReallocationRequest Asynchronous reallocation request.  
Public class FBlendStateInitializerRHI    
Public struct FBoundShaderStateInput    
Public class FBoundShaderStateKey Key used to map a set of unique decl/vs/ps combinations to a vertex shader resource  
Public class FBoundShaderStateLookupKey Non-reference-counted version of shader state key.  
Public struct FByteAddressBuffer    
Public class FCachedBoundShaderStateLink Encapsulates a bound shader state's entry in the cache.  
Public class FCachedBoundShaderStateLink_Threadsafe    
Public struct FClearValueBinding    
Public struct FCopyBufferRegionParams    
Public struct FCrossGPUTransferFence    
Public class FDebugName A type used only for printing a string for debugging/profiling.  
Public class FDefaultRHIRenderQueryPool    
Public struct FDepthStencilStateInitializerRHI    
Public struct FDrawCallCategoryName    
Public class FDumpTransitionsHelper    
Public struct FDynamicReadBuffer    
Public class FDynamicRHI The interface which is implemented by the dynamically bound RHI.  
Public class FDynamicRHIPSOFallback Dynamic RHI for RHIs that do not support real Graphics/Compute Pipelines.  
Public class FExclusiveDepthStencil    
Public class FGenericDataDrivenShaderPlatformInfo    
Public class FGenericRHIGPUFence Generic implementation of FRHIGPUFence.  
Public class FGenericRHIStagingBuffer    
Public struct FGenericStaticFeatureLevel    
Public struct FGenericStaticShaderPlatform    
Public class FGPUDefragAllocator Simple best fit allocator, splitting and coalescing whenever/ wherever possible.  
Public struct FGPUProfiler Encapsulates GPU profiling logic and data.  
Public class FGPUProfilerEventNode Stats for a single perf event node.  
Public struct FGPUProfilerEventNodeFrame An entire frame of perf event nodes, including ancillary timers.  
Public class FGPUProfilerEventNodeStats Stats for a single perf event node.  
Public struct FGpuProfilerTrace    
Public struct FGPUTiming Holds information if this platform's GPU allows timing  
Public struct FGPUTimingCalibrationTimestamp Two timestamps performed on GPU and CPU at nearly the same time.  
Public struct FGraphicsPipelineRenderTargetsInfo    
Public class FGraphicsPipelineStateInitializer    
Public struct FImmutableSamplerState    
Public class FLastRenderTimeContainer Textures  
Public struct FLockTracker    
Public struct FPipelineCacheFileFormatPSO    
Public struct FPipelineCacheFileFormatPSORead    
Public struct FPipelineCachePSOHeader    
Public class FPipelineFileCacheManager    
Public struct FPipelineFileCacheRasterizerState    
Public struct FPipelineStateStats Tracks stats for the current session between opening & closing the file-cache.  
Public struct FPSOPrecacheRequestID Unique request ID of PSOPrecache which can be used to boost the priority of a PSO precache requests if it's needed for rendering.  
Public struct FPSOPrecacheRequestResult Result data of a precache pipeline state request.  
Public struct FPSOUsageData FPipelineFileCacheManager: The RHI-level backend for FShaderPipelineCache, responsible for tracking PSOs and their usage stats as well as dealing with the pipeline cache files.  
Public struct FRasterizerStateInitializerRHI    
Public struct FRawBufferShaderResourceViewInitializer FRawBufferShaderResourceViewInitializer can be used to explicitly create a raw view for any buffer, even if it was not created with EBufferUsageFlags::ByteAddressBuffer flag.  
Public struct FRayTracingAccelerationStructureSize    
Public struct FRayTracingGeometryBuildParams    
Public struct FRayTracingGeometryInitializer    
Public struct FRayTracingGeometryInstance High level descriptor of one or more instances of a mesh in a ray tracing scene.  
Public struct FRayTracingGeometrySegment    
Public class FRayTracingPipelineStateInitializer    
Public class FRayTracingPipelineStateSignature    
Public struct FRayTracingSceneBuildParams    
Public struct FRayTracingSceneInitializer2    
Public struct FReadBuffer Encapsulates a GPU read buffer with its SRV.  
Public class FReadSurfaceDataFlags To customize the RHIReadSurfaceData() output  
Public class FRenderTask    
Public struct FRenderThreadIdleScope Helper to mark scopes as idle time on the render or RHI threads.  
Public struct FResolveRect    
Public class FRHIAmplificationShader    
Public struct FRHIBatchedShaderParameters Collection of parameters to set in the RHI.  
Public struct FRHIBatchedShaderUnbinds Collection of parameters to unbind in the RHI.  
Public class FRHIBlendState    
Public class FRHIBoundShaderState    
Public class FRHIBuffer    
Public struct FRHIBufferCreateInfo Descriptor used to create a buffer resource  
Public struct FRHIBufferDesc    
Public struct FRHIBufferRange    
Public struct FRHIBufferSRVCreateInfo    
Public struct FRHIBufferUAVCreateInfo    
Public struct FRHIBufferUpdateInfo    
Public class FRHIBufferViewCache    
Public struct FRHICommand    
Public struct FRHICommandBase    
Public struct FRHICommandBeginDrawingViewport    
Public struct FRHICommandBeginDrawingViewportString__LINE__    
Public struct FRHICommandBeginFrame    
Public struct FRHICommandBeginFrameString__LINE__    
Public struct FRHICommandBeginRenderPass    
Public struct FRHICommandBeginRenderPassString__LINE__    
Public struct FRHICommandBeginRenderQuery    
Public struct FRHICommandBeginRenderQueryString__LINE__    
Public struct FRHICommandBeginScene    
Public struct FRHICommandBeginSceneString__LINE__    
Public struct FRHICommandBeginSpecificUAVOverlap    
Public struct FRHICommandBeginSpecificUAVOverlapString__LINE__    
Public struct FRHICommandBeginTransitions    
Public struct FRHICommandBeginTransitionsString__LINE__    
Public struct FRHICommandBeginUAVOverlap    
Public struct FRHICommandBeginUAVOverlapString__LINE__    
Public struct FRHICommandBeginUpdateMultiFrameResource    
Public struct FRHICommandBeginUpdateMultiFrameResourceString__LINE__    
Public struct FRHICommandBeginUpdateMultiFrameUAV    
Public struct FRHICommandBeginUpdateMultiFrameUAVString__LINE__    
Public struct FRHICommandCalibrateTimers    
Public struct FRHICommandCalibrateTimersString__LINE__    
Public struct FRHICommandClearUAVFloat    
Public struct FRHICommandClearUAVFloatString__LINE__    
Public struct FRHICommandClearUAVUint    
Public struct FRHICommandClearUAVUintString__LINE__    
Public struct FRHICommandCopyBufferRegion    
Public struct FRHICommandCopyBufferRegionString__LINE__    
Public struct FRHICommandCopyTexture    
Public struct FRHICommandCopyTextureString__LINE__    
Public struct FRHICommandCopyToStagingBuffer    
Public struct FRHICommandCopyToStagingBufferString__LINE__    
Public struct FRHICommandDiscardRenderTargets    
Public struct FRHICommandDiscardRenderTargetsString__LINE__    
Public struct FRHICommandDispatchComputeShader    
Public struct FRHICommandDispatchComputeShaderString__LINE__    
Public struct FRHICommandDispatchIndirectComputeShader    
Public struct FRHICommandDispatchIndirectComputeShaderString__LINE__    
Public struct FRHICommandDispatchIndirectMeshShader    
Public struct FRHICommandDispatchIndirectMeshShaderString__LINE__    
Public struct FRHICommandDispatchMeshShader    
Public struct FRHICommandDispatchMeshShaderString__LINE__    
Public struct FRHICommandDrawIndexedIndirect    
Public struct FRHICommandDrawIndexedIndirectString__LINE__    
Public struct FRHICommandDrawIndexedPrimitive    
Public struct FRHICommandDrawIndexedPrimitiveIndirect    
Public struct FRHICommandDrawIndexedPrimitiveIndirectString__LINE__    
Public struct FRHICommandDrawIndexedPrimitiveString__LINE__    
Public struct FRHICommandDrawPrimitive    
Public struct FRHICommandDrawPrimitiveIndirect    
Public struct FRHICommandDrawPrimitiveIndirectString__LINE__    
Public struct FRHICommandDrawPrimitiveString__LINE__    
Public struct FRHICommandEndDrawingViewport    
Public struct FRHICommandEndDrawingViewportString__LINE__    
Public struct FRHICommandEndFrame    
Public struct FRHICommandEndFrameString__LINE__    
Public struct FRHICommandEndRenderPass    
Public struct FRHICommandEndRenderPassString__LINE__    
Public struct FRHICommandEndRenderQuery    
Public struct FRHICommandEndRenderQueryString__LINE__    
Public struct FRHICommandEndScene    
Public struct FRHICommandEndSceneString__LINE__    
Public struct FRHICommandEndSpecificUAVOverlap    
Public struct FRHICommandEndSpecificUAVOverlapString__LINE__    
Public struct FRHICommandEndTransitions    
Public struct FRHICommandEndTransitionsString__LINE__    
Public struct FRHICommandEndUAVOverlap    
Public struct FRHICommandEndUAVOverlapString__LINE__    
Public struct FRHICommandEndUpdateMultiFrameResource    
Public struct FRHICommandEndUpdateMultiFrameResourceString__LINE__    
Public struct FRHICommandEndUpdateMultiFrameUAV    
Public struct FRHICommandEndUpdateMultiFrameUAVString__LINE__    
Public struct FRHICommandInvalidateCachedState    
Public struct FRHICommandInvalidateCachedStateString__LINE__    
Public class FRHICommandList    
Public class FRHICommandList_RecursiveHazardous Helper to enable the use of graphics RHI command lists from within platform RHI implementations.  
Public class FRHICommandListBase    
Public struct FRHICommandListDebugContext    
Public class FRHICommandListExecutor    
Public class FRHICommandListImmediate    
Public class FRHICommandListIterator Helper class for traversing a FRHICommandList.  
Public class FRHICommandListScopedExtendResourceLifetime    
Public class FRHICommandListScopedFlushAndExecute All command list members should be contained within FRHICommandListBase. The Immediate/Compute/regular types are just interfaces.  
Public class FRHICommandListScopedPipeline Helper to activate a specific RHI pipeline within a block of renderer code.  
Public class FRHICommandListScopedPipelineGuard    
Public struct FRHICommandMultiDrawIndexedPrimitiveIndirect    
Public struct FRHICommandMultiDrawIndexedPrimitiveIndirectString__LINE__    
Public struct FRHICommandNextSubpass    
Public struct FRHICommandNextSubpassString__LINE__    
Public struct FRHICommandPollOcclusionQueries    
Public struct FRHICommandPollOcclusionQueriesString__LINE__    
Public struct FRHICommandPopEvent    
Public struct FRHICommandPopEventString__LINE__    
Public struct FRHICommandPostExternalCommandsReset    
Public struct FRHICommandPostExternalCommandsResetString__LINE__    
Public struct FRHICommandPushEvent    
Public struct FRHICommandPushEventString__LINE__    
Public struct FRHICommandResourceTransition    
Public struct FRHICommandResourceTransitionString__LINE__    
Public struct FRHICommandResummarizeHTile    
Public struct FRHICommandResummarizeHTileString__LINE__    
Public struct FRHICommandSetAsyncComputeBudget    
Public struct FRHICommandSetAsyncComputeBudgetString__LINE__    
Public struct FRHICommandSetBlendFactor    
Public struct FRHICommandSetBlendFactorString__LINE__    
Public struct FRHICommandSetComputePipelineState    
Public struct FRHICommandSetComputePipelineStateString__LINE__    
Public struct FRHICommandSetDepthBounds    
Public struct FRHICommandSetDepthBoundsString__LINE__    
Public struct FRHICommandSetGraphicsPipelineState    
Public struct FRHICommandSetGraphicsPipelineStateString__LINE__    
Public struct FRHICommandSetLocalUniformBuffer    
Public struct FRHICommandSetScissorRect    
Public struct FRHICommandSetScissorRectString__LINE__    
Public struct FRHICommandSetShaderParameters    
Public struct FRHICommandSetShaderParametersString__LINE__    
Public struct FRHICommandSetShaderUnbinds    
Public struct FRHICommandSetShaderUnbindsString__LINE__    
Public struct FRHICommandSetShadingRate    
Public struct FRHICommandSetShadingRateString__LINE__    
Public struct FRHICommandSetStaticUniformBuffers    
Public struct FRHICommandSetStaticUniformBuffersString__LINE__    
Public struct FRHICommandSetStencilRef    
Public struct FRHICommandSetStencilRefString__LINE__    
Public struct FRHICommandSetStereoViewport    
Public struct FRHICommandSetStereoViewportString__LINE__    
Public struct FRHICommandSetStreamSource    
Public struct FRHICommandSetStreamSourceString__LINE__    
Public struct FRHICommandSetTrackedAccess    
Public struct FRHICommandSetTrackedAccessString__LINE__    
Public struct FRHICommandSetViewport    
Public struct FRHICommandSetViewportString__LINE__    
Public struct FRHICommandSubmitCommandsHint    
Public struct FRHICommandSubmitCommandsHintString__LINE__    
Public struct FRHICommandUpdateRHIResources    
Public struct FRHICommandUpdateRHIResourcesString__LINE__    
Public struct FRHICommandWriteGPUFence    
Public struct FRHICommandWriteGPUFenceString__LINE__    
Public class FRHIComputeCommandList    
Public class FRHIComputeCommandList_RecursiveHazardous Helper to enable the use of compute RHI command lists from within platform RHI implementations.  
Public class FRHIComputeFence    
Public class FRHIComputePipelineState    
Public class FRHIComputePipelineStateFallback    
Public class FRHIComputeShader    
Public struct FRHICopyTextureInfo    
Public class FRHICustomPresent    
Public class FRHIDepthRenderTargetView    
Public class FRHIDepthStencilState    
Public struct FRHIDescriptorHandle    
Public struct FRHIDispatchIndirectParameters    
Public struct FRHIDispatchIndirectParametersNoPadding    
Public struct FRHIDrawIndexedIndirectParameters    
Public struct FRHIDrawIndirectParameters    
Public struct FRHIDrawStats    
Public struct FRHIFlipDetails Struct to provide details of swap chain flips  
Public class FRHIGeometryShader    
Public struct FRHIGlobals    
Public class FRHIGPUBufferReadback Buffer readback implementation.  
Public class FRHIGPUFence Generic GPU fence class.  
Public struct FRHIGPUMask A mask where each bit is a GPU index.  
Public class FRHIGPUMemoryReadback FRHIGPUMemoryReadback: Represents a memory readback request scheduled with CopyToStagingBuffer Wraps a staging buffer with a FRHIGPUFence for synchronization.  
Public class FRHIGPUTextureReadback Texture readback implementation.  
Public struct FRHIGPUUsageFractions Structs that describe how intensively a GPU is being used.  
Public class FRHIGraphicsPipelineState Pipeline States  
Public class FRHIGraphicsPipelineStateFallBack This PSO is used as a fallback for RHIs that dont support PSOs. It is used to set the graphics state using the legacy state setting APIs.  
Public class FRHIGraphicsShader    
Public struct FRHILockTracker    
Public class FRHIMeshShader    
Public struct FRHIPerCategoryDrawStats    
Public class FRHIPipelineBinaryLibrary    
Public class FRHIPixelShader    
Public class FRHIPooledRenderQuery    
Public struct FRHIR10G10B10A2 Helper for accessing R10G10B10A2 colors.  
Public class FRHIRasterizerState    
Public class FRHIRayCallableShader    
Public class FRHIRayGenShader    
Public class FRHIRayHitGroupShader    
Public class FRHIRayMissShader    
Public class FRHIRayTracingAccelerationStructure    
Public class FRHIRayTracingGeometry Bottom level ray tracing acceleration structure (contains triangles).  
Public struct FRHIRayTracingGeometryUpdateInfo    
Public class FRHIRayTracingPipelineState    
Public class FRHIRayTracingScene Top level ray tracing acceleration structure (contains instances of meshes).  
Public class FRHIRayTracingShader    
Public struct FRHIRenderPassInfo    
Public class FRHIRenderQuery    
Public class FRHIRenderQueryPool    
Public class FRHIRenderTargetView    
Public class FRHIResource The base type of RHI resources.  
Public struct FRHIResourceCreateInfo    
Public struct FRHIResourceInfo    
Public struct FRHIResourceStats    
Public struct FRHIResourceTableEntry    
Public struct FRHIResourceUpdateBatcher    
Public struct FRHIResourceUpdateInfo    
Public struct FRHIRG16 Helper for accessing R16G16 colors.  
Public struct FRHIRGBA16 Helper for accessing R16G16B16A16 colors.  
Public class FRHISamplerState State blocks  
Public struct FRHIScopedGPUMask    
Public class FRHISetRenderTargetsInfo    
Public class FRHIShader    
Public class FRHIShaderLibrary Shader Library  
Public struct FRHIShaderParameter Compact representation of a bound shader parameter (read: value).  
Public struct FRHIShaderParameterResource Compact representation of a bound resource parameter (Texture, SRV, UAV, SamplerState, or UniformBuffer)  
Public struct FRHIShaderParameterUnbind Compact representation of a resource parameter unbind, limited to SRVs and UAVs  
Public class FRHIShaderResourceView    
Public class FRHIStagingBuffer Generic staging buffer class used by FRHIGPUMemoryReadback RHI specific staging buffers derive from this  
Public struct FRHISubresourceRange    
Public class FRHITexture    
Public struct FRHITextureCreateDesc    
Public struct FRHITextureDesc Descriptor used to create a texture resource  
Public class FRHITextureReference    
Public struct FRHITextureSRVCreateInfo    
Public struct FRHITextureUAVCreateInfo    
Public class FRHITextureViewCache    
Public class FRHITimestampCalibrationQuery Misc  
Public struct FRHITrackedAccessInfo    
Public struct FRHITransientAliasingInfo    
Public struct FRHITransientAliasingOverlap    
Public class FRHITransientAllocationStats    
Public class FRHITransientBuffer    
Public struct FRHITransientHeapAllocation Represents an allocation from the transient heap.  
Public struct FRHITransientPageAllocation Represents a full set of page allocations from multiple page pools.  
Public struct FRHITransientPagePoolAllocation Represents an allocation from a transient page pool.  
Public struct FRHITransientPageSpan    
Public class FRHITransientResource    
Public class FRHITransientTexture    
Public struct FRHITransition Opaque data structure used to represent a pending resource transition in the RHI.  
Public struct FRHITransitionCreateInfo    
Public struct FRHITransitionInfo    
Public class FRHIUniformBuffer    
Public struct FRHIUniformBufferLayout The layout of a uniform buffer in memory.  
Public struct FRHIUniformBufferLayoutInitializer Initializer for the layout of a uniform buffer in memory.  
Public struct FRHIUniformBufferResource    
Public struct FRHIUniformBufferResourceInitializer Data structure to store information about resource parameter in a shader parameter structure.  
Public class FRHIUnorderedAccessView    
Public class FRHIVertexDeclaration    
Public class FRHIVertexShader    
Public class FRHIView    
Public class FRHIViewableResource    
Public struct FRHIViewDesc The unified RHI view descriptor.  
Public class FRHIViewport    
Public struct FRWBuffer Encapsulates a GPU read/write buffer with its UAV and SRV.  
Public struct FRWBufferStructured Encapsulates a GPU read/write structured buffer with its UAV and SRV.  
Public struct FRWByteAddressBuffer Encapsulates a GPU read/write ByteAddress buffer with its UAV and SRV.  
Public struct FSamplerStateInitializerRHI    
Public class FScopedGPUDefragLock FScopedGPUDefragLock can't cover any scope that will add dcb commands or we might deadlock.  
Public class FScopedRHIThreadStaller    
Public struct FScopedUniformBufferStaticBindings    
Public struct FScreenResolutionRHI Screen Resolution  
Public struct FShaderCodeValidationStride    
Public struct FShaderResourceViewInitializer    
Public class FStaticShaderPlatformNames    
Public struct FTextureMemoryStats    
Public struct FTextureReadBuffer2D Encapsulates a GPU read only texture 2D with its SRV.  
Public struct FTextureRWBuffer Encapsulates a GPU read/write texture 2D with its UAV and SRV.  
Public struct FTransferResourceFenceData    
Public struct FTransferResourceParams Parameters for RHITransferResources, used to copy memory between GPUs  
Public class FUniformBufferStaticBindings A list of static uniform buffer bindings.  
Public struct FUnnamedRhiCommand    
Public struct FUpdateTexture3DData Struct to hold common data between begin/end updatetexture3d  
Public struct FUpdateTextureRegion2D Specifies an update region for a texture  
Public struct FUpdateTextureRegion3D Specifies an update region for a texture  
Public struct FVertexElement    
Public class FVertexElementTypeSupportInfo Info for supporting the vertex element types  
Public struct FViewportBounds Viewport bounds structure to set multiple view ports for the geometry shader (needs to be 1:1 to the D3D11 structure)  
Public struct FVRamAllocation    
Public class IDynamicRHIModule Defines the interface of a module implementing a dynamic RHI.  
Public class IRHICommandContext The interface RHI command context.  
Public class IRHICommandContextPSOFallback Command Context for RHIs that do not support real Graphics/Compute Pipelines.  
Public class IRHIComputeContext Context that is capable of doing Compute work. Can be async or compute on the gfx pipe.  
Public class IRHIPlatformCommandList Opaque type representing a finalized platform GPU command list, which can be submitted to the GPU via RHISubmitCommandLists().  
Public class IRHITransientResourceAllocator    
Public class TPsoLruCache Implements a Least Recently Used (LRU) cache.  
Public class TRHICommandList_RecursiveHazardous Helper class used internally by RHIs to make use of FRHICommandList_RecursiveHazardous safer.  
Public class TRHIComputeCommandList_RecursiveHazardous Helper class used internally by RHIs to make use of FRHIComputeCommandList_RecursiveHazardous safer.  
Public class TRHIGlobal Wrapper for GRHI## global variables, allows values to be overridden for mobile preview modes.  
Public struct TRHILambdaCommand    
Public class TRHIPipelineArray Array of pass handles by RHI pipeline, with overloads to help with enum conversion.  
Public struct TRHIRange Views  
Public struct TRHIResourceUpdateBatcher    
Public struct TRHIShaderToEnum Templates to convert an FRHI*Shader to its enum.  

Enums

  Type Name Description
Public enum EImmediateFlushType::Type    
Public enum ERenderThreadIdleTypes::Type    
Public enum ERHIFeatureLevel::Type The RHI's feature level indicates what level of support can be relied upon.  
Public enum ERHIShadingPath::Type The RHI's currently enabled shading path.  

Functions

  Type Name Description
Public function void Boost the priority of the given PSO request ID
Public function EPSOPrecacheResult Retrieve the current PSO precache result state (slightly slower than IsPrecaching)
Public function EPSOPrecacheResult Retrieve the current PSO precache result state (slightly slower than IsPrecaching)
Public function FGraphicsPipelineState *  
Public function void Evicts unused state entries based on r.pso.evictiontime time.
Public function FComputePipelineState *  
Public function FGraphicsPipelineState *

PipelineStateCache::GetAndOrCreateGraphicsPipelineState ( FRHICommandList& RHICmdList,
const FGraphicsPipelineStateInitializer& OriginalInitializer,
EApplyRendertargetOption ApplyFlags,
EPSOPrecacheResult PSOPrecacheResult
)

  
Public function FRayTracingPipelineState *

PipelineStateCache::GetAndOrCreateRayTracingPipelineState ( FRHICommandList& RHICmdList,
const FRayTracingPipelineStateInitializer& Initializer,
ERayTracingPipelineCacheFlags Flags
)

 Retrieves RTPSO object from cache or adds a task to create it, which will be waited on by RHI thread.
Public function int32 Returns the number of PSO precompiles currently in progress
Public function FRHIVertexDeclaration *

PipelineStateCache::GetOrCreateVertexDeclaration ( const FVertexDeclarationElementList& Elements
)

  
Public function FRayTracingPipelineState * Retrieves RTPSO object from cache or returns NULL if it's not found.
Public function bool Is the given PSO still precaching?
Public function bool Any async precaching operations still busy
Public function bool Is the given PSO initializer still precaching?
Public function bool Is the given PSO initializer still precaching?
Public function bool Is precaching currently enabled - can help to skip certain time critical code when precaching is disabled
Public function uint32 Return number of active or pending PSO precache requests
Public function FPSOPrecacheRequestResult Precache the compute shader and return a request ID if precached async
Public function FPSOPrecacheRequestResult Precache the graphic PSO and return an optional graph event if precached async
Public function void Called when PSO precompile has completed
Public function void  
Public function uint64

PipelineStateCache::RetrieveGraphicsPipelineStateSortKey ( const FGraphicsPipelineState* GraphicsPipelineState
)

  
Public function void Clears all pipeline cached state.

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