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* Track namespaces for symbols * Re-emit namespace scopes * Conservatively include symbols from all namespaces in minified code (as if they were all global) * Additional parsing work will be required to more accurately track used symbols based on active namespaces (i.e. handle `using` keyword, etc.) * Added RemoveDeadCode() overload that takes an explicit list of required symbols instead of just an entry point name #rb dan.elksnitis #preflight 6398be5e35203bc7aa7f9b47 [CL 23494729 by Yuriy ODonnell in ue5-main branch]
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreMinimal.h"
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#include "Containers/UnrealString.h"
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#include "Misc/EnumClassFlags.h"
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namespace UE::ShaderMinifier
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{
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enum EMinifyShaderFlags
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{
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None = 0,
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/** Add `// REASON: foo` comments next to emitted code blocks to identify which other block uses it or other reason why it was included */
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OutputReasons = 1 << 1,
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/** Add a comment describing how many functions, structs, etc. were emitted */
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OutputStats = 1 << 2,
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/** Add `#line <line> <filename>` directives for each emitted code block */
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OutputLines = 1 << 3,
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/** Keep original global scope comment lines, such as `// #define FOO 123` that were added by UE shader preprocessor */
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OutputCommentLines = 1 << 4,
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};
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ENUM_CLASS_FLAGS(EMinifyShaderFlags)
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struct FDiagnosticMessage
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{
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FString Message;
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FString File;
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int32 Offset = INDEX_NONE;
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int32 Line = INDEX_NONE;
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int32 Column = INDEX_NONE;
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};
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struct FDiagnostics
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{
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TArray<FDiagnosticMessage> Errors;
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TArray<FDiagnosticMessage> Warnings;
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};
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struct FMinifiedShader
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{
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FString Code;
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FDiagnostics Diagnostics;
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bool Success() const
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{
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return Diagnostics.Errors.IsEmpty() && !Code.IsEmpty();
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}
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};
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extern SHADERCOMPILERCOMMON_API FMinifiedShader Minify(const FStringView PreprocessedShader, const FStringView EntryPoint, EMinifyShaderFlags Flags = EMinifyShaderFlags::None);
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extern SHADERCOMPILERCOMMON_API FMinifiedShader Minify(const FStringView PreprocessedShader, TConstArrayView<FStringView> RequiredSymbols, EMinifyShaderFlags Flags = EMinifyShaderFlags::None);
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} // UE::ShaderMinifier
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