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Since the cbuffer uses the same name as the struct, we have to rename the cbuffer using a consistent prefix. The reflection handling also needs to reinterpret the renamed cbuffer as the correct UniformBuffer. #jira none #rb mihnea.balta #preflight 626c1762ce3959ce8fe7766e [CL 20026049 by christopher waters in ue5-main branch]
552 lines
22 KiB
C++
552 lines
22 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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ShaderParameters.cpp: Shader parameter implementation.
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=============================================================================*/
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#include "ShaderParameters.h"
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#include "Containers/List.h"
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#include "UniformBuffer.h"
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#include "ShaderCore.h"
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#include "Shader.h"
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#include "VertexFactory.h"
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#include "ShaderCodeLibrary.h"
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#include "Misc/ScopeRWLock.h"
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#include "Misc/ScopeLock.h"
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IMPLEMENT_TYPE_LAYOUT(FShaderParameter);
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IMPLEMENT_TYPE_LAYOUT(FShaderResourceParameter);
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IMPLEMENT_TYPE_LAYOUT(FRWShaderParameter);
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IMPLEMENT_TYPE_LAYOUT(FShaderUniformBufferParameter);
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void FShaderParameter::Bind(const FShaderParameterMap& ParameterMap,const TCHAR* ParameterName,EShaderParameterFlags Flags)
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{
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if (!ParameterMap.FindParameterAllocation(ParameterName,BufferIndex,BaseIndex,NumBytes) && Flags == SPF_Mandatory)
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{
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if (!UE_LOG_ACTIVE(LogShaders, Log))
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{
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UE_LOG(LogShaders, Fatal,TEXT("Failure to bind non-optional shader parameter %s! The parameter is either not present in the shader, or the shader compiler optimized it out."),ParameterName);
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}
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else
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{
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// We use a non-Slate message box to avoid problem where we haven't compiled the shaders for Slate.
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FPlatformMisc::MessageBoxExt( EAppMsgType::Ok, *FText::Format(
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NSLOCTEXT("UnrealEd", "Error_FailedToBindShaderParameter", "Failure to bind non-optional shader parameter {0}! The parameter is either not present in the shader, or the shader compiler optimized it out. This will be an assert with LogShaders suppressed!"),
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FText::FromString(ParameterName)).ToString(), TEXT("Warning"));
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}
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}
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}
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FArchive& operator<<(FArchive& Ar,FShaderParameter& P)
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{
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uint16& PBufferIndex = P.BufferIndex;
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return Ar << P.BaseIndex << P.NumBytes << PBufferIndex;
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}
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void FShaderResourceParameter::Bind(const FShaderParameterMap& ParameterMap,const TCHAR* ParameterName,EShaderParameterFlags Flags)
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{
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uint16 UnusedBufferIndex = 0;
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if(!ParameterMap.FindParameterAllocation(ParameterName,UnusedBufferIndex,BaseIndex,NumResources) && Flags == SPF_Mandatory)
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{
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if (!UE_LOG_ACTIVE(LogShaders, Log))
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{
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UE_LOG(LogShaders, Fatal,TEXT("Failure to bind non-optional shader resource parameter %s! The parameter is either not present in the shader, or the shader compiler optimized it out."),ParameterName);
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}
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else
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{
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// We use a non-Slate message box to avoid problem where we haven't compiled the shaders for Slate.
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FPlatformMisc::MessageBoxExt( EAppMsgType::Ok, *FText::Format(
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NSLOCTEXT("UnrealEd", "Error_FailedToBindShaderParameter", "Failure to bind non-optional shader parameter {0}! The parameter is either not present in the shader, or the shader compiler optimized it out. This will be an assert with LogShaders suppressed!"),
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FText::FromString(ParameterName)).ToString(), TEXT("Warning"));
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}
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}
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}
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FArchive& operator<<(FArchive& Ar,FShaderResourceParameter& P)
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{
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return Ar << P.BaseIndex << P.NumResources;
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}
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void FShaderUniformBufferParameter::ModifyCompilationEnvironment(const TCHAR* ParameterName,const FShaderParametersMetadata& Struct,EShaderPlatform Platform,FShaderCompilerEnvironment& OutEnvironment)
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{
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const FString IncludeName = FString::Printf(TEXT("/Engine/Generated/UniformBuffers/%s.ush"),ParameterName);
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// Add the uniform buffer declaration to the compilation environment as an include: UniformBuffers/<ParameterName>.usf
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FString Declaration;
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CreateUniformBufferShaderDeclaration(ParameterName, Struct, Platform, Declaration);
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OutEnvironment.IncludeVirtualPathToContentsMap.Add(IncludeName, Declaration);
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FString& GeneratedUniformBuffersInclude = OutEnvironment.IncludeVirtualPathToContentsMap.FindOrAdd("/Engine/Generated/GeneratedUniformBuffers.ush");
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FString Include = FString::Printf(TEXT("#include \"/Engine/Generated/UniformBuffers/%s.ush\"") LINE_TERMINATOR, ParameterName);
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GeneratedUniformBuffersInclude.Append(Include);
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Struct.AddResourceTableEntries(OutEnvironment.ResourceTableMap, OutEnvironment.UniformBufferMap);
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}
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void FShaderUniformBufferParameter::Bind(const FShaderParameterMap& ParameterMap,const TCHAR* ParameterName,EShaderParameterFlags Flags)
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{
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uint16 UnusedBaseIndex = 0;
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uint16 UnusedNumBytes = 0;
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if(!ParameterMap.FindParameterAllocation(ParameterName,BaseIndex,UnusedBaseIndex,UnusedNumBytes))
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{
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BaseIndex = 0xffff;
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if(Flags == SPF_Mandatory)
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{
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if (!UE_LOG_ACTIVE(LogShaders, Log))
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{
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UE_LOG(LogShaders, Fatal,TEXT("Failure to bind non-optional shader resource parameter %s! The parameter is either not present in the shader, or the shader compiler optimized it out."),ParameterName);
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}
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else
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{
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// We use a non-Slate message box to avoid problem where we haven't compiled the shaders for Slate.
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FPlatformMisc::MessageBoxExt( EAppMsgType::Ok, *FText::Format(
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NSLOCTEXT("UnrealEd", "Error_FailedToBindShaderParameter", "Failure to bind non-optional shader parameter {0}! The parameter is either not present in the shader, or the shader compiler optimized it out. This will be an assert with LogShaders suppressed!"),
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FText::FromString(ParameterName)).ToString(), TEXT("Warning"));
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}
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}
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}
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else
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{
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check(IsBound());
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}
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}
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/** The individual bits of a uniform buffer declaration. */
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struct FUniformBufferDecl
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{
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/** Members to place in the constant buffer. */
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FString ConstantBufferMembers;
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/** Members to place in the resource table. */
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FString ResourceMembers;
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/** Members in the struct HLSL shader code will access. */
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FString StructMembers;
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/** The HLSL initializer that will copy constants and resources in to the struct. */
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FString Initializer;
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};
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/** Generates a HLSL struct declaration for a uniform buffer struct. */
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static void CreateHLSLUniformBufferStructMembersDeclaration(
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const FShaderParametersMetadata& UniformBufferStruct,
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const FString& NamePrefix,
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uint32 StructOffset,
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EShaderPlatform Platform,
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FUniformBufferDecl& Decl,
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uint32& HLSLBaseOffset)
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{
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const TArray<FShaderParametersMetadata::FMember>& StructMembers = UniformBufferStruct.GetMembers();
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FString PreviousBaseTypeName = TEXT("float");
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for (int32 MemberIndex = 0; MemberIndex < StructMembers.Num(); ++MemberIndex)
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{
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const FShaderParametersMetadata::FMember& Member = StructMembers[MemberIndex];
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FString ArrayDim;
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if(Member.GetNumElements() > 0)
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{
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ArrayDim = FString::Printf(TEXT("[%u]"),Member.GetNumElements());
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}
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if(Member.GetBaseType() == UBMT_NESTED_STRUCT)
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{
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checkf(Member.GetNumElements() == 0, TEXT("SHADER_PARAMETER_STRUCT_ARRAY() is not supported in uniform buffer yet."));
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Decl.StructMembers += TEXT("struct {\r\n");
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Decl.Initializer += TEXT("{");
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CreateHLSLUniformBufferStructMembersDeclaration(*Member.GetStructMetadata(), FString::Printf(TEXT("%s%s_"), *NamePrefix, Member.GetName()), StructOffset + Member.GetOffset(), Platform, Decl, HLSLBaseOffset);
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Decl.Initializer += TEXT("},");
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Decl.StructMembers += FString::Printf(TEXT("} %s%s;\r\n"),Member.GetName(),*ArrayDim);
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}
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else if (Member.GetBaseType() == UBMT_INCLUDED_STRUCT)
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{
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CreateHLSLUniformBufferStructMembersDeclaration(*Member.GetStructMetadata(), NamePrefix, StructOffset + Member.GetOffset(), Platform, Decl, HLSLBaseOffset);
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}
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else if (IsShaderParameterTypeForUniformBufferLayout(Member.GetBaseType()))
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{
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// Skip resources, they will be replaced with padding by the next member in the constant buffer.
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// This padding will cause gaps in the constant buffer. Alternatively we could compact the constant buffer during RHICreateUniformBuffer.
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continue;
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}
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else
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{
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// Generate the base type name.
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FString BaseTypeName;
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switch(Member.GetBaseType())
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{
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case UBMT_INT32: BaseTypeName = TEXT("int"); break;
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case UBMT_UINT32: BaseTypeName = TEXT("uint"); break;
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case UBMT_FLOAT32:
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if (Member.GetPrecision() == EShaderPrecisionModifier::Float || !SupportShaderPrecisionModifier(Platform))
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{
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BaseTypeName = TEXT("float");
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}
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else if (Member.GetPrecision() == EShaderPrecisionModifier::Half)
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{
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BaseTypeName = TEXT("half");
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}
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else if (Member.GetPrecision() == EShaderPrecisionModifier::Fixed)
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{
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BaseTypeName = TEXT("fixed");
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}
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break;
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default: UE_LOG(LogShaders, Fatal,TEXT("Unrecognized uniform buffer struct member base type."));
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};
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// Generate the type dimensions for vectors and matrices.
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FString TypeDim;
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uint32 HLSLMemberSize = 4;
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if(Member.GetNumRows() > 1)
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{
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TypeDim = FString::Printf(TEXT("%ux%u"),Member.GetNumRows(),Member.GetNumColumns());
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// Each row of a matrix is 16 byte aligned.
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HLSLMemberSize = (Member.GetNumRows() - 1) * 16 + Member.GetNumColumns() * 4;
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}
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else if(Member.GetNumColumns() > 1)
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{
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TypeDim = FString::Printf(TEXT("%u"),Member.GetNumColumns());
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HLSLMemberSize = Member.GetNumColumns() * 4;
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}
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// Array elements are 16 byte aligned.
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if(Member.GetNumElements() > 0)
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{
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HLSLMemberSize = (Member.GetNumElements() - 1) * Align(HLSLMemberSize,16) + HLSLMemberSize;
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}
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const uint32 AbsoluteMemberOffset = StructOffset + Member.GetOffset();
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// If the HLSL offset doesn't match the C++ offset, generate padding to fix it.
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if(HLSLBaseOffset != AbsoluteMemberOffset)
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{
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check(HLSLBaseOffset < AbsoluteMemberOffset);
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while(HLSLBaseOffset < AbsoluteMemberOffset)
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{
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Decl.ConstantBufferMembers += FString::Printf(TEXT("\t%s PrePadding_%s%u;\r\n"), *PreviousBaseTypeName, *NamePrefix, HLSLBaseOffset);
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HLSLBaseOffset += 4;
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};
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check(HLSLBaseOffset == AbsoluteMemberOffset);
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}
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PreviousBaseTypeName = BaseTypeName;
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HLSLBaseOffset = AbsoluteMemberOffset + HLSLMemberSize;
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// Generate the member declaration.
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FString ParameterName = FString::Printf(TEXT("%s%s"),*NamePrefix,Member.GetName());
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Decl.ConstantBufferMembers += FString::Printf(TEXT("\t%s%s %s%s;\r\n"),*BaseTypeName,*TypeDim,*ParameterName,*ArrayDim);
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Decl.StructMembers += FString::Printf(TEXT("\t%s%s %s%s;\r\n"),*BaseTypeName,*TypeDim,Member.GetName(),*ArrayDim);
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Decl.Initializer += FString::Printf(TEXT("%s,"),*ParameterName);
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}
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}
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for (int32 MemberIndex = 0; MemberIndex < StructMembers.Num(); ++MemberIndex)
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{
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const FShaderParametersMetadata::FMember& Member = StructMembers[MemberIndex];
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if (IsShaderParameterTypeForUniformBufferLayout(Member.GetBaseType()))
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{
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checkf(!IsRDGResourceAccessType(Member.GetBaseType()), TEXT("RDG access parameter types (e.g. RDG_TEXTURE_ACCESS) are not allowed in uniform buffers."));
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if (Member.GetBaseType() == UBMT_SRV)
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{
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// TODO: handle arrays?
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FString ParameterName = FString::Printf(TEXT("%s%s"),*NamePrefix,Member.GetName());
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Decl.ResourceMembers += FString::Printf(TEXT("PLATFORM_SUPPORTS_SRV_UB_MACRO( %s %s; ) \r\n"), Member.GetShaderType(), *ParameterName);
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Decl.StructMembers += FString::Printf(TEXT("\tPLATFORM_SUPPORTS_SRV_UB_MACRO( %s %s; ) \r\n"), Member.GetShaderType(), Member.GetName());
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Decl.Initializer += FString::Printf(TEXT(" PLATFORM_SUPPORTS_SRV_UB_MACRO( %s, ) "), *ParameterName);
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}
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else
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{
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// TODO: handle arrays?
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FString ParameterName = FString::Printf(TEXT("%s%s"),*NamePrefix,Member.GetName());
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Decl.ResourceMembers += FString::Printf(TEXT("%s %s;\r\n"), Member.GetShaderType(), *ParameterName);
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Decl.StructMembers += FString::Printf(TEXT("\t%s %s;\r\n"), Member.GetShaderType(), Member.GetName());
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Decl.Initializer += FString::Printf(TEXT("%s,"), *ParameterName);
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}
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}
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}
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}
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/** Creates a HLSL declaration of a uniform buffer with the given structure. */
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static FString CreateHLSLUniformBufferDeclaration(const TCHAR* Name,const FShaderParametersMetadata& UniformBufferStruct, EShaderPlatform Platform)
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{
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// If the uniform buffer has no members, we don't want to write out anything. Shader compilers throw errors when faced with empty cbuffers and structs.
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if (UniformBufferStruct.GetMembers().Num() > 0)
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{
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FString NamePrefix(FString(Name) + FString(TEXT("_")));
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FUniformBufferDecl Decl;
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uint32 HLSLBaseOffset = 0;
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CreateHLSLUniformBufferStructMembersDeclaration(UniformBufferStruct, NamePrefix, 0, Platform, Decl, HLSLBaseOffset);
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return FString::Printf(
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TEXT("#ifndef __UniformBuffer_%s_Definition__\r\n")
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TEXT("#define __UniformBuffer_%s_Definition__\r\n")
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TEXT("cbuffer UB_CB_NAME(%s)\r\n")
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TEXT("{\r\n")
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TEXT("%s")
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TEXT("}\r\n")
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TEXT("%s")
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TEXT("static const struct\r\n")
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TEXT("{\r\n")
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TEXT("%s")
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TEXT("} %s = {%s};\r\n")
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TEXT("#endif\r\n"),
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Name,
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Name,
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Name,
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*Decl.ConstantBufferMembers,
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*Decl.ResourceMembers,
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*Decl.StructMembers,
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Name,
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*Decl.Initializer
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);
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}
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return FString(TEXT("\n"));
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}
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RENDERCORE_API void CreateUniformBufferShaderDeclaration(const TCHAR* Name,const FShaderParametersMetadata& UniformBufferStruct, EShaderPlatform Platform, FString& OutDeclaration)
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{
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OutDeclaration = CreateHLSLUniformBufferDeclaration(Name, UniformBufferStruct, Platform);
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}
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RENDERCORE_API void CacheUniformBufferIncludes(TMap<const TCHAR*,FCachedUniformBufferDeclaration>& Cache, EShaderPlatform Platform)
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{
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for (TMap<const TCHAR*,FCachedUniformBufferDeclaration>::TIterator It(Cache); It; ++It)
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{
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FCachedUniformBufferDeclaration& BufferDeclaration = It.Value();
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check(BufferDeclaration.Declaration.Get() == NULL);
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for (TLinkedList<FShaderParametersMetadata*>::TIterator StructIt(FShaderParametersMetadata::GetStructList()); StructIt; StructIt.Next())
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{
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if (It.Key() == StructIt->GetShaderVariableName())
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{
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FString* NewDeclaration = new FString();
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CreateUniformBufferShaderDeclaration(StructIt->GetShaderVariableName(), **StructIt, Platform, *NewDeclaration);
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check(!NewDeclaration->IsEmpty());
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BufferDeclaration.Declaration = MakeShareable(NewDeclaration);
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break;
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}
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}
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}
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}
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static const uint32 NumUniformBufferLocks = 16u;
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static FRWLock UniformBufferLocks[NumUniformBufferLocks];
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void FShaderType::FlushShaderFileCache(const TMap<FString, TArray<const TCHAR*> >& ShaderFileToUniformBufferVariables)
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{
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if (CachedUniformBufferPlatform != SP_NumPlatforms)
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{
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const uint32 LockIndex = HashedName.GetHash() % NumUniformBufferLocks;
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FWriteScopeLock Lock(UniformBufferLocks[LockIndex]);
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if (CachedUniformBufferPlatform != SP_NumPlatforms)
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{
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ReferencedUniformBufferStructsCache.Empty();
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GenerateReferencedUniformBuffers(SourceFilename, Name, ShaderFileToUniformBufferVariables, ReferencedUniformBufferStructsCache);
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CachedUniformBufferPlatform = SP_NumPlatforms;
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}
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}
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}
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void FShaderType::AddReferencedUniformBufferIncludes(FShaderCompilerEnvironment& OutEnvironment, FString& OutSourceFilePrefix, EShaderPlatform Platform) const
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{
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TRACE_CPUPROFILER_EVENT_SCOPE(FShaderType::AddReferencedUniformBufferIncludes);
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const uint32 LockIndex = HashedName.GetHash() % NumUniformBufferLocks;
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TOptional<FReadScopeLock> ReadScopeLock; // TOptional is so we can unlock and lock manually; the FReadScopeLock api does not support that
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ReadScopeLock.Emplace(UniformBufferLocks[LockIndex]);
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for (;;)
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{
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// Cache uniform buffer struct declarations referenced by this shader type's files
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if (CachedUniformBufferPlatform == Platform)
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{
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break;
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}
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// Drop the ReadLock, acquire a write lock
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// Write the ReferencedUniformBufferStructsCache for the new Platform
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// Drop the WriteLock, reacquire the ReadLock
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ReadScopeLock.Reset();
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{
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FWriteScopeLock WriteScopeLock(UniformBufferLocks[LockIndex]);
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if (CachedUniformBufferPlatform != Platform)
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{
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// If there is already a cache but for another platform, keep the keys but reset the values
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if (CachedUniformBufferPlatform != SP_NumPlatforms)
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{
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for (TMap<const TCHAR*, FCachedUniformBufferDeclaration>::TIterator It(ReferencedUniformBufferStructsCache); It; ++It)
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{
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It.Value() = FCachedUniformBufferDeclaration();
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}
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}
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CacheUniformBufferIncludes(ReferencedUniformBufferStructsCache, Platform);
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CachedUniformBufferPlatform = Platform;
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}
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}
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ReadScopeLock.Emplace(UniformBufferLocks[LockIndex]);
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}
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FString UniformBufferIncludes;
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for (TMap<const TCHAR*,FCachedUniformBufferDeclaration>::TConstIterator It(ReferencedUniformBufferStructsCache); It; ++It)
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{
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const FCachedUniformBufferDeclaration& Value = It.Value();
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check(Value.Declaration.Get() != NULL);
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check(!Value.Declaration.Get()->IsEmpty());
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UniformBufferIncludes += FString::Printf(TEXT("#include \"/Engine/Generated/UniformBuffers/%s.ush\"") LINE_TERMINATOR, It.Key());
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OutEnvironment.IncludeVirtualPathToExternalContentsMap.Add(
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FString::Printf(TEXT("/Engine/Generated/UniformBuffers/%s.ush"),It.Key()),
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Value.Declaration
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);
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for (TLinkedList<FShaderParametersMetadata*>::TIterator StructIt(FShaderParametersMetadata::GetStructList()); StructIt; StructIt.Next())
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{
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if (It.Key() == StructIt->GetShaderVariableName())
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{
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StructIt->AddResourceTableEntries(OutEnvironment.ResourceTableMap, OutEnvironment.UniformBufferMap);
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}
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}
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}
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FString& GeneratedUniformBuffersInclude = OutEnvironment.IncludeVirtualPathToContentsMap.FindOrAdd("/Engine/Generated/GeneratedUniformBuffers.ush");
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GeneratedUniformBuffersInclude.Append(UniformBufferIncludes);
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OutEnvironment.SetDefine(TEXT("PLATFORM_SUPPORTS_SRV_UB"), TEXT("1"));
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}
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void FShaderType::DumpDebugInfo()
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{
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UE_LOG(LogConsoleResponse, Display, TEXT("----------------------------- GLobalShader %s"), GetName());
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UE_LOG(LogConsoleResponse, Display, TEXT(" :Target %s"), GetShaderFrequencyString(GetFrequency()));
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UE_LOG(LogConsoleResponse, Display, TEXT(" :TotalPermutationCount %d"), TotalPermutationCount);
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#if WITH_EDITOR
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UE_LOG(LogConsoleResponse, Display, TEXT(" :SourceHash %s"), *GetSourceHash(GMaxRHIShaderPlatform).ToString());
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#endif
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switch (ShaderTypeForDynamicCast)
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{
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case EShaderTypeForDynamicCast::Global:
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UE_LOG(LogConsoleResponse, Display, TEXT(" :ShaderType Global"));
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break;
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case EShaderTypeForDynamicCast::Material:
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UE_LOG(LogConsoleResponse, Display, TEXT(" :ShaderType Material"));
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break;
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case EShaderTypeForDynamicCast::MeshMaterial:
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UE_LOG(LogConsoleResponse, Display, TEXT(" :ShaderType MeshMaterial"));
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break;
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case EShaderTypeForDynamicCast::Niagara:
|
|
UE_LOG(LogConsoleResponse, Display, TEXT(" :ShaderType Niagara"));
|
|
break;
|
|
}
|
|
|
|
#if 0
|
|
UE_LOG(LogConsoleResponse, Display, TEXT(" --- %d shaders"), ShaderIdMap.Num());
|
|
int32 Index = 0;
|
|
for (auto& KeyValue : ShaderIdMap)
|
|
{
|
|
UE_LOG(LogConsoleResponse, Display, TEXT(" --- shader %d"), Index);
|
|
FShader* Shader = KeyValue.Value;
|
|
Shader->DumpDebugInfo();
|
|
Index++;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void FShaderType::GetShaderStableKeyParts(FStableShaderKeyAndValue& SaveKeyVal)
|
|
{
|
|
#if WITH_EDITOR
|
|
static FName NAME_Material(TEXT("Material"));
|
|
static FName NAME_MeshMaterial(TEXT("MeshMaterial"));
|
|
static FName NAME_Niagara(TEXT("Niagara"));
|
|
switch (ShaderTypeForDynamicCast)
|
|
{
|
|
case EShaderTypeForDynamicCast::Global:
|
|
SaveKeyVal.ShaderClass = NAME_Global;
|
|
break;
|
|
case EShaderTypeForDynamicCast::Material:
|
|
SaveKeyVal.ShaderClass = NAME_Material;
|
|
break;
|
|
case EShaderTypeForDynamicCast::MeshMaterial:
|
|
SaveKeyVal.ShaderClass = NAME_MeshMaterial;
|
|
break;
|
|
case EShaderTypeForDynamicCast::Niagara:
|
|
SaveKeyVal.ShaderClass = NAME_Niagara;
|
|
break;
|
|
}
|
|
SaveKeyVal.ShaderType = FName(GetName() ? GetName() : TEXT("null"));
|
|
#endif
|
|
}
|
|
|
|
void FVertexFactoryType::FlushShaderFileCache(const TMap<FString, TArray<const TCHAR*> >& ShaderFileToUniformBufferVariables)
|
|
{
|
|
if (CachedUniformBufferPlatform != SP_NumPlatforms)
|
|
{
|
|
const uint32 LockIndex = HashedName.GetHash() % NumUniformBufferLocks;
|
|
FWriteScopeLock Lock(UniformBufferLocks[LockIndex]);
|
|
if (CachedUniformBufferPlatform != SP_NumPlatforms)
|
|
{
|
|
ReferencedUniformBufferStructsCache.Empty();
|
|
GenerateReferencedUniformBuffers(ShaderFilename, Name, ShaderFileToUniformBufferVariables, ReferencedUniformBufferStructsCache);
|
|
CachedUniformBufferPlatform = SP_NumPlatforms;
|
|
}
|
|
}
|
|
}
|
|
|
|
void FVertexFactoryType::AddReferencedUniformBufferIncludes(FShaderCompilerEnvironment& OutEnvironment, FString& OutSourceFilePrefix, EShaderPlatform Platform) const
|
|
{
|
|
const uint32 LockIndex = HashedName.GetHash() % NumUniformBufferLocks;
|
|
TOptional<FReadScopeLock> ReadScopeLock; // TOptional is so we can unlock and lock manually; the FReadScopeLock api does not support that
|
|
ReadScopeLock.Emplace(UniformBufferLocks[LockIndex]);
|
|
for (;;)
|
|
{
|
|
// Cache uniform buffer struct declarations referenced by this shader type's files
|
|
if (CachedUniformBufferPlatform == Platform)
|
|
{
|
|
break;
|
|
}
|
|
|
|
// Drop the ReadLock, acquire a write lock
|
|
// Write the ReferencedUniformBufferStructsCache for the new Platform
|
|
// Drop the WriteLock, reacquire the ReadLock
|
|
ReadScopeLock.Reset();
|
|
{
|
|
FWriteScopeLock WriteScopeLock(UniformBufferLocks[LockIndex]);
|
|
if (CachedUniformBufferPlatform != Platform)
|
|
{
|
|
// If there is already a cache but for another platform, keep the keys but reset the values
|
|
if (CachedUniformBufferPlatform != SP_NumPlatforms)
|
|
{
|
|
for (TMap<const TCHAR*, FCachedUniformBufferDeclaration>::TIterator It(ReferencedUniformBufferStructsCache); It; ++It)
|
|
{
|
|
It.Value() = FCachedUniformBufferDeclaration();
|
|
}
|
|
}
|
|
CacheUniformBufferIncludes(ReferencedUniformBufferStructsCache, Platform);
|
|
CachedUniformBufferPlatform = Platform;
|
|
}
|
|
}
|
|
ReadScopeLock.Emplace(UniformBufferLocks[LockIndex]);
|
|
}
|
|
|
|
FString UniformBufferIncludes;
|
|
|
|
for (TMap<const TCHAR*,FCachedUniformBufferDeclaration>::TConstIterator It(ReferencedUniformBufferStructsCache); It; ++It)
|
|
{
|
|
check(It.Value().Declaration.Get() != NULL);
|
|
check(!It.Value().Declaration.Get()->IsEmpty());
|
|
UniformBufferIncludes += FString::Printf(TEXT("#include \"/Engine/Generated/UniformBuffers/%s.ush\"") LINE_TERMINATOR, It.Key());
|
|
OutEnvironment.IncludeVirtualPathToExternalContentsMap.Add(
|
|
*FString::Printf(TEXT("/Engine/Generated/UniformBuffers/%s.ush"),It.Key()),
|
|
It.Value().Declaration
|
|
);
|
|
|
|
for (TLinkedList<FShaderParametersMetadata*>::TIterator StructIt(FShaderParametersMetadata::GetStructList()); StructIt; StructIt.Next())
|
|
{
|
|
if (It.Key() == StructIt->GetShaderVariableName())
|
|
{
|
|
StructIt->AddResourceTableEntries(OutEnvironment.ResourceTableMap, OutEnvironment.UniformBufferMap);
|
|
}
|
|
}
|
|
}
|
|
|
|
FString& GeneratedUniformBuffersInclude = OutEnvironment.IncludeVirtualPathToContentsMap.FindOrAdd("/Engine/Generated/GeneratedUniformBuffers.ush");
|
|
GeneratedUniformBuffersInclude.Append(UniformBufferIncludes);
|
|
OutEnvironment.SetDefine(TEXT("PLATFORM_SUPPORTS_SRV_UB"), TEXT("1"));
|
|
}
|