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a18b223061
#preflight 631bca62304480f8f8c2db54 #rb Jason.Nadro [CL 21931128 by Yuriy ODonnell in ue5-main branch]
1425 lines
36 KiB
C++
1425 lines
36 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "ShaderMinifier.h"
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#include "HAL/PlatformTime.h"
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#include "Hash/CityHash.h"
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#include "HlslParser.h"
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#include "Logging/LogMacros.h"
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#include "Misc/AutomationTest.h"
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#include "String/Find.h"
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DEFINE_LOG_CATEGORY_STATIC(LogShaderMinifier, Log, All);
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// TODO:
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// - track namespaces
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// - preserve multi-line #define
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// - track and re-emit correct #line
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namespace UE::ShaderMinifier
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{
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static FStringView SubStrView(FStringView S, int32 Start)
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{
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Start = FMath::Min(Start, S.Len());
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int32 Len = S.Len() - Start;
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return FStringView(S.GetData() + Start, Len);
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}
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static FStringView SubStrView(FStringView S, int32 Start, int32 Len)
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{
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Start = FMath::Min(Start, S.Len());
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Len = FMath::Min(Len, S.Len() - Start);
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return FStringView(S.GetData() + Start, Len);
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}
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template<typename TCondition>
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static FStringView SkipUntil(FStringView Source, TCondition Cond)
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{
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int32 Cursor = 0;
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int32 SourceLen = Source.Len();
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while (Cursor < SourceLen)
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{
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if (Cond(FStringView(Source.GetData() + Cursor, SourceLen - Cursor)))
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{
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break;
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}
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++Cursor;
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}
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return FStringView(Source.GetData() + Cursor, SourceLen - Cursor);
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}
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static bool IsSpace(TCHAR C)
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{
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switch (C)
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{
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default:
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return false;
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case TCHAR(' '):
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case TCHAR('\f'):
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case TCHAR('\r'):
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case TCHAR('\n'):
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case TCHAR('\t'):
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case TCHAR('\v'):
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return true;
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}
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}
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static bool IsNumber(TCHAR C)
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{
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return C >= '0' && C <= '9';
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}
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static bool IsPossibleIdentifierCharacter(TCHAR C)
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{
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return (C >= '0' && C <= '9') || (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z') || C == '_';
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}
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static FStringView SkipUntilNonIdentifierCharacter(FStringView Source) {
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int32 Len = Source.Len();
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int32 Cursor = 0;
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const TCHAR* SourceData = Source.GetData();
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while (Cursor < Len)
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{
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if (!IsPossibleIdentifierCharacter(SourceData[Cursor]))
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{
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break;
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}
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++Cursor;
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}
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return FStringView(SourceData + Cursor, Len - Cursor);
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}
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static FStringView SkipSpace(FStringView Source)
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{
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int32 Len = Source.Len();
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int32 Cursor = 0;
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const TCHAR* SourceData = Source.GetData();
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while (Cursor < Len)
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{
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if (!IsSpace(SourceData[Cursor]))
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{
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break;
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}
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++Cursor;
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}
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return FStringView(SourceData + Cursor, Len - Cursor);
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}
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static FStringView TrimSpace(FStringView Source)
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{
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int32 CursorBegin = 0;
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int32 CursorEnd = Source.Len();
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while (CursorBegin != CursorEnd)
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{
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if (!IsSpace(Source[CursorBegin]))
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{
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break;
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}
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++CursorBegin;
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}
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while (CursorBegin != CursorEnd)
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{
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if (!IsSpace(Source[CursorEnd-1]))
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{
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break;
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}
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--CursorEnd;
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}
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FStringView Result = SubStrView(Source, CursorBegin, CursorEnd-CursorBegin);
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return Result;
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}
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static FStringView SkipUntilNextLine(FStringView Source)
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{
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int32 Index = INDEX_NONE;
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if (Source.FindChar('\n', Index))
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{
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Index += 1; // Skip the new line character itself
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return FStringView(Source.GetData() + Index, Source.Len() - Index);
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}
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else
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{
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return FStringView {};
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}
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}
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static FStringView SkipUntilStr(FStringView Haystack, FStringView Needle)
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{
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return SkipUntil(Haystack, [Needle](FStringView S) { return S.StartsWith(Needle, ESearchCase::CaseSensitive); });
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}
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static int32 FindFirstOf(FStringView Haystack, FStringView Needle)
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{
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int32 Len = Haystack.Len();
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for (int32 i = 0; i < Len; ++i)
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{
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TCHAR C = Haystack[i];
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for (TCHAR C2 : Needle)
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{
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if (C == C2)
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{
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return i;
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}
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}
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}
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return INDEX_NONE;
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}
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static FStringView ExtractBlock(FStringView Source, TCHAR DelimBegin, TCHAR DelimEnd)
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{
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// TODO: handle comments
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// TODO: handle #if 0 blocks
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int32 PosEnd = INDEX_NONE;
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int32 Stack = 0;
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for (int32 I = 0; I < Source.Len(); ++I)
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{
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TCHAR C = Source[I];
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if (C == DelimBegin)
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{
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Stack++;
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}
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else if (C == DelimEnd)
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{
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if (Stack == 0)
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{
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// delimiter mismatch
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break;
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}
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Stack--;
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if (Stack == 0)
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{
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PosEnd = I;
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break;
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}
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}
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}
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if (Stack == 0 && PosEnd != INDEX_NONE)
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{
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return FStringView(Source.GetData(), PosEnd + 1);
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}
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else
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{
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return FStringView{};
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}
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}
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enum class EBlockType : uint8 {
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Unknown,
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Keyword, // e.g. struct, switch, register
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Attribute, // e.g. `[numthreads(8,8,1)]`
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Type, // return type of function or struct/cbuffer/variable type
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Base, // inheritance base type
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Name, // struct/variable/function name
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Binding, // e.g. `register(t0, space1)` or `SV_Target0`
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Args,
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Body,
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Subscript,
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TemplateArgs,
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Expression,
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Directive, // #define, #pragma, #line, etc.
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NamespaceDelimiter, // e.g. :: in an identifier like Foo::bar
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};
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struct FCodeBlock
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{
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EBlockType Type = EBlockType::Unknown;
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FStringView Code;
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};
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enum class ECodeChunkType {
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Unknown,
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Struct,
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CBuffer, // HLSL cbuffer block possibly without trailing ';'
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Function,
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Variable,
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Enum,
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Define,
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Pragma,
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};
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struct FCodeChunk
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{
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ECodeChunkType Type = ECodeChunkType::Unknown;
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TArray<FCodeBlock> Blocks;
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FStringView FindFirstBlockByType(EBlockType InType) const
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{
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for (const FCodeBlock& Block : Blocks)
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{
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if (Block.Type == InType)
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{
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return Block.Code;
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}
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}
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return {};
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}
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};
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struct FParsedShader
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{
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TArray<FCodeChunk> Chunks;
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};
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static FParsedShader ParseShader(FStringView InSource, FDiagnostics& Output)
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{
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FParsedShader Result;
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FStringView Source = InSource;
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TArray<FCodeBlock> PendingBlocks;
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TArray<FCodeChunk> Chunks;
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ECodeChunkType ChunkType = ECodeChunkType::Unknown;
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bool bFoundBody = false;
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bool bFoundColon = false;
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bool bFoundIdentifier = false;
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bool bFoundAssignment = false;
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int32 ArgsBlockIndex = INDEX_NONE;
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int32 CbufferBlockIndex = INDEX_NONE;
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int32 StructBlockIndex = INDEX_NONE;
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int32 EnumBlockIndex = INDEX_NONE;
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int32 BodyBlockIndex = INDEX_NONE;
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int32 ExpressionBlockIndex = INDEX_NONE;
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auto AddDiagnostic = [InSource, &Source](TArray<FDiagnosticMessage>& Output, FStringView Message)
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{
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FDiagnosticMessage Diagnostic;
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Diagnostic.Message = FString(Message);
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Diagnostic.Offset = int32(Source.GetData() - InSource.GetData());
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// Diagnostic.Line = ...; // TODO
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// Diagnostic.Column = ...; // TODO
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Output.Add(MoveTemp(Diagnostic));
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};
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auto AddBlock = [&PendingBlocks](EBlockType Type, FStringView Code)
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{
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FCodeBlock NewBlock;
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NewBlock.Type = Type;
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NewBlock.Code = Code;
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PendingBlocks.Push(NewBlock);
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};
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auto FinalizeChunk = [&]() {
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const bool bFoundArgs = ArgsBlockIndex >= 0;
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bool bHasType = false;
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bool bHasName = false;
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if (!PendingBlocks.IsEmpty())
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{
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if (ChunkType == ECodeChunkType::Unknown)
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{
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if (bFoundIdentifier && bFoundArgs && bFoundBody)
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{
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ChunkType = ECodeChunkType::Function;
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}
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else if (bFoundIdentifier)
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{
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ChunkType = ECodeChunkType::Variable;
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}
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}
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int32 NameBlockIndex = INDEX_NONE;
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if (ChunkType == ECodeChunkType::Struct)
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{
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check(StructBlockIndex >= 0);
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PendingBlocks[StructBlockIndex].Type = EBlockType::Keyword;
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int32 TypeBlockIndex = StructBlockIndex + 1;
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if (TypeBlockIndex != BodyBlockIndex && TypeBlockIndex < PendingBlocks.Num())
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{
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PendingBlocks[TypeBlockIndex].Type = EBlockType::Type;
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bHasType = true;
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}
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if (ExpressionBlockIndex > 0)
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{
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NameBlockIndex = ExpressionBlockIndex - 1;
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PendingBlocks[NameBlockIndex].Type = EBlockType::Name;
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bHasName = true;
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}
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}
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else if (ChunkType == ECodeChunkType::CBuffer)
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{
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check(CbufferBlockIndex >= 0);
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PendingBlocks[CbufferBlockIndex].Type = EBlockType::Keyword;
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int32 TypeBlockIndex = CbufferBlockIndex + 1;
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if (TypeBlockIndex != BodyBlockIndex && TypeBlockIndex < PendingBlocks.Num())
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{
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PendingBlocks[TypeBlockIndex].Type = EBlockType::Type;
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}
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}
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else if (ChunkType == ECodeChunkType::Enum)
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{
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check(EnumBlockIndex >= 0);
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PendingBlocks[EnumBlockIndex].Type = EBlockType::Keyword;
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if (BodyBlockIndex > 1)
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{
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PendingBlocks[BodyBlockIndex - 1].Type = EBlockType::Type;
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}
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}
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else if (ChunkType == ECodeChunkType::Function)
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{
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NameBlockIndex = ArgsBlockIndex - 1;
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if (NameBlockIndex >= 0)
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{
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PendingBlocks[NameBlockIndex].Type = EBlockType::Name;
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}
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}
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else if (ChunkType == ECodeChunkType::Variable)
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{
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// TODO: tag name / type / binding
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}
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if (ChunkType == ECodeChunkType::Struct && bHasName && !bHasType)
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{
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ChunkType = ECodeChunkType::Variable;
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}
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if (ChunkType == ECodeChunkType::Struct && bHasName && bHasType)
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{
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// Handle simultaneous struct type and variable declaration
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FCodeChunk StructChunk;
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StructChunk.Type = ECodeChunkType::Struct;
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for (int32 i = int32(StructBlockIndex); i < NameBlockIndex; ++i)
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{
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StructChunk.Blocks.Push(PendingBlocks[i]);
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}
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FCodeChunk VarChunk;
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VarChunk.Type = ECodeChunkType::Variable;
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for (int32 i = 0; i < PendingBlocks.Num(); ++i)
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{
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if (i == StructBlockIndex || i == BodyBlockIndex)
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{
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continue;
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}
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VarChunk.Blocks.Push(PendingBlocks[i]);
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}
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Chunks.Push(StructChunk);
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Chunks.Push(VarChunk);
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}
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else
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{
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FCodeChunk Chunk;
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Chunk.Type = ChunkType;
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Swap(Chunk.Blocks, PendingBlocks);
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Chunks.Push(Chunk);
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}
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ChunkType = ECodeChunkType::Unknown;
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ArgsBlockIndex = INDEX_NONE;
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CbufferBlockIndex = INDEX_NONE;
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StructBlockIndex = INDEX_NONE;
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EnumBlockIndex = INDEX_NONE;
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BodyBlockIndex = INDEX_NONE;
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ExpressionBlockIndex = INDEX_NONE;
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bFoundBody = false;
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bFoundColon = false;
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bFoundIdentifier = false;
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bFoundAssignment = false;
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PendingBlocks.Empty();
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}
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};
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while (Output.Errors.IsEmpty())
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{
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Source = SkipSpace(Source);
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if (Source.IsEmpty())
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{
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break;
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}
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if (Source.StartsWith(TEXT("//")) || Source.StartsWith(TEXT("#line")))
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{
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Source = SkipUntilNextLine(Source);
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continue;
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}
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else if (Source.StartsWith(TEXT("#pragma")))
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{
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FStringView Remainder = SkipUntilNextLine(Source);
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FStringView Block = SubStrView(Source, 0, Source.Len() - Remainder.Len());
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AddBlock(EBlockType::Directive, Block);
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ChunkType = ECodeChunkType::Pragma;
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FinalizeChunk();
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Source = Remainder;
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continue;
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}
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else if (Source.StartsWith(TEXT("#define")))
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{
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// TODO: handle `\` new lines in defines
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FStringView Remainder = SkipUntilNextLine(Source);
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FStringView Block = SubStrView(Source, 0, Source.Len() - Remainder.Len());
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AddBlock(EBlockType::Directive, Block);
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ChunkType = ECodeChunkType::Define;
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FinalizeChunk();
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Source = Remainder;
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continue;
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}
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else if (Source.StartsWith(TEXT("#if 0")))
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{
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Source = SkipUntilStr(Source, TEXT("#endif"));
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if (Source.Len() >= 6)
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{
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Source = SubStrView(Source, 6);
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}
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continue;
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}
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else if (Source.StartsWith(TEXT("/*")))
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{
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Source = SkipUntilStr(Source, TEXT("*/"));
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if (Source.Len() >= 2)
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{
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Source = SubStrView(Source, 2);
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}
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continue;
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}
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FStringView Remainder = SkipUntilNonIdentifierCharacter(Source);
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FStringView Identifier = SubStrView(Source, 0, Source.Len() - Remainder.Len());
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if (Identifier.Len())
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{
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if (ChunkType == ECodeChunkType::Unknown)
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{
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if (Identifier == TEXT("struct"))
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{
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ChunkType = ECodeChunkType::Struct;
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StructBlockIndex = PendingBlocks.Num();
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}
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else if (Identifier == TEXT("cbuffer") || Identifier == TEXT("ConstantBuffer"))
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{
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ChunkType = ECodeChunkType::CBuffer;
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CbufferBlockIndex = PendingBlocks.Num();
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}
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else if (Identifier == TEXT("enum"))
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{
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ChunkType = ECodeChunkType::Enum;
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EnumBlockIndex = PendingBlocks.Num();
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}
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}
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|
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EBlockType BlockType = EBlockType::Unknown;
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|
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if (bFoundColon)
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{
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if (ChunkType == ECodeChunkType::Struct)
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{
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BlockType = EBlockType::Base;
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}
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else
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{
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BlockType = EBlockType::Binding;
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}
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bFoundColon = false;
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}
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AddBlock(BlockType, Identifier);
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Source = Remainder;
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bFoundIdentifier = true;
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continue;
|
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}
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|
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FStringView Block;
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|
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TCHAR C = Source[0];
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|
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EBlockType BlockType = EBlockType::Unknown;
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|
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if (Source.StartsWith(TEXT("==")))
|
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{
|
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AddDiagnostic(Output.Errors, TEXT("Unexpected sequence '=='"));
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break;
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}
|
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else if (Source.StartsWith(TEXT("::")))
|
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{
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Block = SubStrView(Source, 0, 2);
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Source = SubStrView(Source, 2);
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|
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AddBlock(EBlockType::NamespaceDelimiter, Block);
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|
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continue;
|
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}
|
|
else if (C == '=')
|
|
{
|
|
int32 Pos = FindFirstOf(Source, TEXT("{;"));
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|
|
if (Pos == INDEX_NONE)
|
|
{
|
|
AddDiagnostic(Output.Errors, TEXT("Expected block body or semicolon after '='"));
|
|
break;
|
|
}
|
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|
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bFoundAssignment = true;
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|
|
char C2 = Source[Pos];
|
|
|
|
if (C2 == '{')
|
|
{
|
|
Source = SubStrView(Source, Pos);
|
|
continue;
|
|
}
|
|
else if (C2 == ';')
|
|
{
|
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Block = SubStrView(Source, 1, Pos - 1);
|
|
Block = TrimSpace(Block);
|
|
|
|
int32 BlockOffset = int32(Block.GetData() - Source.GetData());
|
|
Source = SubStrView(Source, BlockOffset);
|
|
|
|
BlockType = EBlockType::Expression;
|
|
ExpressionBlockIndex = int32(PendingBlocks.Num());
|
|
}
|
|
}
|
|
else if (C == ':')
|
|
{
|
|
Source = SubStrView(Source, 1);
|
|
bFoundColon = true;
|
|
continue;
|
|
}
|
|
else if (C == '(')
|
|
{
|
|
Block = ExtractBlock(Source, '(', ')');
|
|
BlockType = EBlockType::Args;
|
|
|
|
if (ArgsBlockIndex < 0)
|
|
{
|
|
ArgsBlockIndex = PendingBlocks.Num();
|
|
}
|
|
}
|
|
else if (C == '{')
|
|
{
|
|
Block = ExtractBlock(Source, '{', '}');
|
|
|
|
if (BodyBlockIndex == INDEX_NONE && !bFoundAssignment)
|
|
{
|
|
BlockType = EBlockType::Body;
|
|
BodyBlockIndex = PendingBlocks.Num();
|
|
bFoundBody = true;
|
|
}
|
|
else if (bFoundAssignment)
|
|
{
|
|
BlockType = EBlockType::Expression;
|
|
ExpressionBlockIndex = PendingBlocks.Num();
|
|
}
|
|
}
|
|
else if (C == '[')
|
|
{
|
|
Block = ExtractBlock(Source, '[', ']');
|
|
|
|
if (bFoundIdentifier)
|
|
{
|
|
BlockType = EBlockType::Subscript;
|
|
}
|
|
else
|
|
{
|
|
BlockType = EBlockType::Attribute;
|
|
}
|
|
}
|
|
else if (C == '<')
|
|
{
|
|
Block = ExtractBlock(Source, '<', '>');
|
|
BlockType = EBlockType::TemplateArgs;
|
|
|
|
if (ChunkType == ECodeChunkType::CBuffer)
|
|
{
|
|
// `ConstantBuffer<Foo>` is treated as a variable/resource declaration rather than a cbuffer block
|
|
ChunkType = ECodeChunkType::Variable;
|
|
}
|
|
}
|
|
else if (C == ';')
|
|
{
|
|
FinalizeChunk();
|
|
Source = SubStrView(Source, 1);
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
AddDiagnostic(Output.Errors, TEXT("Unexpected character"));
|
|
break;
|
|
}
|
|
|
|
if (Block.IsEmpty())
|
|
{
|
|
AddDiagnostic(Output.Errors, TEXT("Failed to extract code block"));
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
AddBlock(BlockType, Block);
|
|
|
|
Source = SubStrView(Source, Block.Len());
|
|
|
|
if (BlockType == EBlockType::Body && ArgsBlockIndex != INDEX_NONE)
|
|
{
|
|
FinalizeChunk();
|
|
}
|
|
else if (BlockType == EBlockType::Body && CbufferBlockIndex != INDEX_NONE)
|
|
{
|
|
FinalizeChunk();
|
|
}
|
|
else if (BlockType == EBlockType::Expression)
|
|
{
|
|
FinalizeChunk();
|
|
}
|
|
}
|
|
}
|
|
|
|
std::swap(Result.Chunks, Chunks);
|
|
|
|
return Result;
|
|
}
|
|
|
|
template<typename CallbackT>
|
|
void FindChunksByIdentifier(TConstArrayView<FCodeChunk> Chunks, FStringView Identifier, CallbackT Callback)
|
|
{
|
|
for (const FCodeChunk& Chunk : Chunks)
|
|
{
|
|
for (const FCodeBlock& Block : Chunk.Blocks)
|
|
{
|
|
if (Block.Code == Identifier)
|
|
{
|
|
Callback(Chunk);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static TArray<FStringView> SplitByChar(FStringView Source, TCHAR Delimiter)
|
|
{
|
|
TArray<FStringView> Result;
|
|
|
|
int32 Start = 0;
|
|
|
|
for (int32 I = 0; I < Source.Len(); ++I)
|
|
{
|
|
TCHAR C = Source[I];
|
|
if (C == Delimiter)
|
|
{
|
|
size_t Len = I - Start;
|
|
Result.Push(SubStrView(Source, Start, Len));
|
|
Start = I + 1;
|
|
}
|
|
}
|
|
|
|
if (Start != Source.Len())
|
|
{
|
|
int32 Len = Source.Len() - Start;
|
|
Result.Push(SubStrView(Source, Start, Len));
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
static void ExtractIdentifiers(FStringView InSource, TArray<FStringView>& Result)
|
|
{
|
|
FStringView Source = InSource;
|
|
|
|
const ESearchCase::Type SC = ESearchCase::CaseSensitive;
|
|
|
|
for (;;)
|
|
{
|
|
Source = SkipSpace(Source);
|
|
|
|
if (Source.IsEmpty())
|
|
{
|
|
break;
|
|
}
|
|
|
|
if (!IsPossibleIdentifierCharacter(Source[0]))
|
|
{
|
|
if (Source.StartsWith(TEXT("//"), SC)
|
|
|| Source.StartsWith(TEXT("#line"), SC)
|
|
|| Source.StartsWith(TEXT("#pragma"), SC))
|
|
{
|
|
Source = SkipUntilNextLine(Source);
|
|
continue;
|
|
}
|
|
else if (Source.StartsWith(TEXT("#if 0"), SC))
|
|
{
|
|
Source = SkipUntilStr(Source, TEXT("#endif"));
|
|
if (Source.Len() >= 6)
|
|
{
|
|
Source = SubStrView(Source, 6);
|
|
}
|
|
continue;
|
|
}
|
|
else if (Source.StartsWith(TEXT("/*"), SC))
|
|
{
|
|
Source = SkipUntilStr(Source, TEXT("*/"));
|
|
if (Source.Len() >= 2)
|
|
{
|
|
Source = SubStrView(Source, 2);
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
FStringView Remainder = SkipUntilNonIdentifierCharacter(Source);
|
|
|
|
FStringView Identifier = SubStrView(Source, 0, Source.Len() - Remainder.Len());
|
|
|
|
if (Identifier.IsEmpty())
|
|
{
|
|
if (!Remainder.IsEmpty())
|
|
{
|
|
Remainder = SubStrView(Remainder, 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!IsNumber(Identifier[0])) // Identifiers can't start with numbers
|
|
{
|
|
Result.Push(Identifier);
|
|
}
|
|
}
|
|
|
|
Source = Remainder;
|
|
}
|
|
}
|
|
|
|
static void ExtractIdentifiers(const FCodeChunk& Chunk, TArray<FStringView>& Result)
|
|
{
|
|
for (const FCodeBlock& Block : Chunk.Blocks)
|
|
{
|
|
ExtractIdentifiers(Block.Code, Result);
|
|
}
|
|
}
|
|
|
|
static void OutputChunk(const FCodeChunk& Chunk, FStringBuilderBase& OutputStream)
|
|
{
|
|
if (Chunk.Blocks.IsEmpty())
|
|
{
|
|
return;
|
|
}
|
|
|
|
int32 Index = 0;
|
|
for (const FCodeBlock& Block : Chunk.Blocks)
|
|
{
|
|
if (Index != 0)
|
|
{
|
|
OutputStream << ' ';
|
|
}
|
|
|
|
if (Block.Type == EBlockType::Expression)
|
|
{
|
|
OutputStream << "= ";
|
|
}
|
|
else if (Block.Type == EBlockType::Body)
|
|
{
|
|
OutputStream << "\n";
|
|
}
|
|
|
|
if (Block.Type == EBlockType::Binding || Block.Type == EBlockType::Base)
|
|
{
|
|
OutputStream << ": ";
|
|
}
|
|
|
|
OutputStream << Block.Code;
|
|
|
|
++Index;
|
|
}
|
|
|
|
if (Chunk.Type != ECodeChunkType::Function
|
|
&& Chunk.Type != ECodeChunkType::CBuffer
|
|
&& Chunk.Type != ECodeChunkType::Pragma
|
|
&& Chunk.Type != ECodeChunkType::Define)
|
|
{
|
|
OutputStream << ";";
|
|
}
|
|
|
|
OutputStream << "\n\n";
|
|
}
|
|
|
|
struct FCasedStringViewKeyFuncs : public DefaultKeyFuncs<FStringView>
|
|
{
|
|
static FORCEINLINE FStringView GetSetKey(FStringView K) { return K; }
|
|
template <typename T>
|
|
static FORCEINLINE FStringView GetSetKey(const TPair<FStringView, T>& P) { return P.Key; }
|
|
static FORCEINLINE bool Matches(FStringView A, FStringView B) { return A.Equals(B, ESearchCase::CaseSensitive); }
|
|
static FORCEINLINE uint32 GetKeyHash(FStringView Key)
|
|
{
|
|
return CityHash32((const char*)Key.GetData(), Key.Len() * sizeof(*Key.GetData()));
|
|
}
|
|
};
|
|
|
|
static FString MinifyShader(const FParsedShader& Parsed, FStringView SemicolonSeparatedEntryPoints, EMinifyShaderFlags Flags, FDiagnostics& Diagnostics)
|
|
{
|
|
FStringBuilderBase OutputStream;
|
|
|
|
TSet<FStringView, FCasedStringViewKeyFuncs, FDefaultSetAllocator> RelevantIdentifiers;
|
|
|
|
TSet<const FCodeChunk*> RelevantChunks;
|
|
TSet<FStringView, FCasedStringViewKeyFuncs, FDefaultSetAllocator> ProcessedIdentifiers;
|
|
|
|
TArray<const FCodeChunk*> PendingChunks;
|
|
|
|
TArray<FStringView> EntryPoints = SplitByChar(SemicolonSeparatedEntryPoints, ';');
|
|
|
|
for (FStringView Entry : EntryPoints)
|
|
{
|
|
RelevantIdentifiers.Add(Entry);
|
|
ProcessedIdentifiers.Add(Entry);
|
|
FindChunksByIdentifier(Parsed.Chunks, Entry, [&PendingChunks](const FCodeChunk& Chunk) { PendingChunks.Push(&Chunk); });
|
|
}
|
|
|
|
for (const FCodeChunk* Chunk : PendingChunks)
|
|
{
|
|
RelevantChunks.Add(Chunk);
|
|
}
|
|
|
|
{
|
|
// Some known builtin words to ignore
|
|
|
|
ProcessedIdentifiers.Add(TEXT("asfloat"));
|
|
ProcessedIdentifiers.Add(TEXT("asint"));
|
|
ProcessedIdentifiers.Add(TEXT("asuint"));
|
|
ProcessedIdentifiers.Add(TEXT("bool"));
|
|
ProcessedIdentifiers.Add(TEXT("bool2"));
|
|
ProcessedIdentifiers.Add(TEXT("bool3"));
|
|
ProcessedIdentifiers.Add(TEXT("bool4"));
|
|
ProcessedIdentifiers.Add(TEXT("cbuffer"));
|
|
ProcessedIdentifiers.Add(TEXT("const"));
|
|
ProcessedIdentifiers.Add(TEXT("else"));
|
|
ProcessedIdentifiers.Add(TEXT("false"));
|
|
ProcessedIdentifiers.Add(TEXT("float"));
|
|
ProcessedIdentifiers.Add(TEXT("float2"));
|
|
ProcessedIdentifiers.Add(TEXT("float3"));
|
|
ProcessedIdentifiers.Add(TEXT("float3x3"));
|
|
ProcessedIdentifiers.Add(TEXT("float3x4"));
|
|
ProcessedIdentifiers.Add(TEXT("float4"));
|
|
ProcessedIdentifiers.Add(TEXT("float4x4"));
|
|
ProcessedIdentifiers.Add(TEXT("for"));
|
|
ProcessedIdentifiers.Add(TEXT("if"));
|
|
ProcessedIdentifiers.Add(TEXT("in"));
|
|
ProcessedIdentifiers.Add(TEXT("inout"));
|
|
ProcessedIdentifiers.Add(TEXT("int"));
|
|
ProcessedIdentifiers.Add(TEXT("int2"));
|
|
ProcessedIdentifiers.Add(TEXT("int3"));
|
|
ProcessedIdentifiers.Add(TEXT("int4"));
|
|
ProcessedIdentifiers.Add(TEXT("out"));
|
|
ProcessedIdentifiers.Add(TEXT("return"));
|
|
ProcessedIdentifiers.Add(TEXT("static"));
|
|
ProcessedIdentifiers.Add(TEXT("struct"));
|
|
ProcessedIdentifiers.Add(TEXT("switch"));
|
|
ProcessedIdentifiers.Add(TEXT("true"));
|
|
ProcessedIdentifiers.Add(TEXT("uint"));
|
|
ProcessedIdentifiers.Add(TEXT("uint2"));
|
|
ProcessedIdentifiers.Add(TEXT("uint3"));
|
|
ProcessedIdentifiers.Add(TEXT("uint4"));
|
|
ProcessedIdentifiers.Add(TEXT("void"));
|
|
ProcessedIdentifiers.Add(TEXT("while"));
|
|
|
|
#if 0 // Some shaders define template versions of some built-in functions, so we can't trivially ignore them
|
|
//ProcessedIdentifiers.Add(TEXT("abs"));
|
|
//ProcessedIdentifiers.Add(TEXT("any"));
|
|
//ProcessedIdentifiers.Add(TEXT("clamp"));
|
|
//ProcessedIdentifiers.Add(TEXT("clip"));
|
|
//ProcessedIdentifiers.Add(TEXT("cos"));
|
|
//ProcessedIdentifiers.Add(TEXT("cross"));
|
|
//ProcessedIdentifiers.Add(TEXT("dot"));
|
|
//ProcessedIdentifiers.Add(TEXT("frac"));
|
|
//ProcessedIdentifiers.Add(TEXT("lerp"));
|
|
//ProcessedIdentifiers.Add(TEXT("max"));
|
|
//ProcessedIdentifiers.Add(TEXT("min"));
|
|
//ProcessedIdentifiers.Add(TEXT("mul"));
|
|
//ProcessedIdentifiers.Add(TEXT("normalize"));
|
|
//ProcessedIdentifiers.Add(TEXT("pow"));
|
|
//ProcessedIdentifiers.Add(TEXT("saturate"));
|
|
//ProcessedIdentifiers.Add(TEXT("sign"));
|
|
//ProcessedIdentifiers.Add(TEXT("sin"));
|
|
//ProcessedIdentifiers.Add(TEXT("sqrt"));
|
|
#endif
|
|
}
|
|
|
|
if (PendingChunks.IsEmpty())
|
|
{
|
|
// printf("Entry point chunk is not found in the shader\n");
|
|
return {};
|
|
}
|
|
|
|
TArray<FStringView> TempIdentifiers;
|
|
|
|
TMap<FStringView, TArray<const FCodeChunk*>, FDefaultSetAllocator, FCasedStringViewKeyFuncs> ChunksByIdentifier;
|
|
for (const FCodeChunk& Chunk : Parsed.Chunks)
|
|
{
|
|
for (const FCodeBlock& Block : Chunk.Blocks)
|
|
{
|
|
if (Chunk.Type == ECodeChunkType::Function && Block.Type != EBlockType::Name)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (Chunk.Type == ECodeChunkType::Struct && Block.Type != EBlockType::Type)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (Chunk.Type == ECodeChunkType::CBuffer && Block.Type == EBlockType::Body)
|
|
{
|
|
TempIdentifiers.Empty();
|
|
ExtractIdentifiers(Block.Code, TempIdentifiers);
|
|
for (FStringView Identifier : TempIdentifiers)
|
|
{
|
|
ChunksByIdentifier.FindOrAdd(Identifier).Push(&Chunk);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
ChunksByIdentifier.FindOrAdd(Block.Code).Push(&Chunk);
|
|
}
|
|
}
|
|
|
|
TMap<const FCodeChunk*, const FCodeChunk*> ChunkRequestedBy;
|
|
|
|
while (!PendingChunks.IsEmpty())
|
|
{
|
|
TempIdentifiers.Empty();
|
|
|
|
const FCodeChunk* CurrentChunk = PendingChunks.Last();
|
|
PendingChunks.Pop();
|
|
|
|
ExtractIdentifiers(*CurrentChunk, TempIdentifiers);
|
|
|
|
for (FStringView Identifier : TempIdentifiers)
|
|
{
|
|
bool bIdentifierWasAlreadyInSet = false;
|
|
ProcessedIdentifiers.Add(Identifier, &bIdentifierWasAlreadyInSet);
|
|
if (!bIdentifierWasAlreadyInSet)
|
|
{
|
|
auto FoundChunks = ChunksByIdentifier.Find(Identifier);
|
|
if (FoundChunks == nullptr)
|
|
{
|
|
continue;
|
|
}
|
|
for (const FCodeChunk* Chunk : *FoundChunks)
|
|
{
|
|
if (Chunk == CurrentChunk)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
bool bChunkWasAlreadyInSet = false;
|
|
RelevantChunks.Add(Chunk, &bChunkWasAlreadyInSet);
|
|
if (!bChunkWasAlreadyInSet)
|
|
{
|
|
PendingChunks.Push(Chunk);
|
|
|
|
// TODO: handle cbuffers, resources and globals
|
|
if (Chunk->Type == ECodeChunkType::Function || Chunk->Type == ECodeChunkType::Struct)
|
|
{
|
|
ChunkRequestedBy.FindOrAdd(Chunk) = CurrentChunk;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
uint32 NumFunctions = 0;
|
|
uint32 NumStructs = 0;
|
|
uint32 NumVariables = 0;
|
|
uint32 NumCBuffers = 0;
|
|
uint32 NumOtherChunks = 0;
|
|
|
|
for (const FCodeChunk& Chunk : Parsed.Chunks)
|
|
{
|
|
if (RelevantChunks.Find(&Chunk) == nullptr)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// TODO: print chunk info
|
|
if (Chunk.Type == ECodeChunkType::Function)
|
|
{
|
|
NumFunctions += 1;
|
|
}
|
|
else if (Chunk.Type == ECodeChunkType::Struct)
|
|
{
|
|
NumStructs += 1;
|
|
}
|
|
else if (Chunk.Type == ECodeChunkType::Variable)
|
|
{
|
|
NumVariables += 1;
|
|
}
|
|
else if (Chunk.Type == ECodeChunkType::CBuffer)
|
|
{
|
|
NumCBuffers += 1;
|
|
}
|
|
else
|
|
{
|
|
NumOtherChunks += 1;
|
|
}
|
|
}
|
|
|
|
if (EnumHasAnyFlags(Flags, EMinifyShaderFlags::OutputStats))
|
|
{
|
|
OutputStream << "// Total code chunks: " << RelevantChunks.Num() << "\n";
|
|
OutputStream << "// - Functions: " << NumFunctions << "\n";
|
|
OutputStream << "// - Structs: " << NumStructs << "\n";
|
|
OutputStream << "// - CBuffers: " << NumCBuffers << "\n";
|
|
OutputStream << "// - Variables: " << NumVariables << "\n";
|
|
OutputStream << "// - Other: " << NumOtherChunks << "\n";
|
|
OutputStream << "\n";
|
|
}
|
|
|
|
for (const FCodeChunk& Chunk : Parsed.Chunks)
|
|
{
|
|
if (Chunk.Type != ECodeChunkType::Pragma // Pragmas and defines that remain after preprocessing
|
|
&& Chunk.Type != ECodeChunkType::Define // must be preserved as they may control important compiler behaviors.
|
|
// && Chunk.Type != ECodeChunkType::Variable // Varibles must be currently preserved due to how RootParametersStructure is generated later.
|
|
// && Chunk.Type != ECodeChunkType::CBuffer // TODO: analyze cbuffer member usage
|
|
&& RelevantChunks.Find(&Chunk) == nullptr)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (EnumHasAnyFlags(Flags, EMinifyShaderFlags::OutputReasons))
|
|
{
|
|
auto RequestedBy = ChunkRequestedBy.Find(&Chunk);
|
|
if (RequestedBy != nullptr)
|
|
{
|
|
const FCodeChunk* RequestedByChunk = *RequestedBy;
|
|
FStringView RequestedByName = RequestedByChunk->FindFirstBlockByType(EBlockType::Name);
|
|
if (!RequestedByName.IsEmpty())
|
|
{
|
|
OutputStream << "// REASON: " << RequestedByName << "\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
OutputChunk(Chunk, OutputStream);
|
|
}
|
|
|
|
FString Output = FString(OutputStream.ToView());
|
|
|
|
return Output;
|
|
}
|
|
|
|
FMinifiedShader Minify(const FStringView PreprocessedShader, const FStringView EntryPoint, EMinifyShaderFlags Flags)
|
|
{
|
|
FMinifiedShader Result;
|
|
|
|
FParsedShader Parsed = ParseShader(PreprocessedShader, Result.Diagnostics);
|
|
|
|
if (!Parsed.Chunks.IsEmpty())
|
|
{
|
|
Result.Code = MinifyShader(Parsed, EntryPoint, Flags, Result.Diagnostics);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
} // namespace UE::ShaderMinifier
|
|
|
|
#if WITH_AUTOMATION_TESTS
|
|
|
|
IMPLEMENT_SIMPLE_AUTOMATION_TEST(FShaderMinifierParserTest, "System.Shaders.ShaderMinifier.Parse", EAutomationTestFlags::EditorContext | EAutomationTestFlags::EngineFilter);
|
|
|
|
namespace UE::ShaderMinifier
|
|
{
|
|
// Convenience wrapper for tests where we don't care about diagnostic messages
|
|
static FParsedShader ParseShader(FStringView InSource)
|
|
{
|
|
FDiagnostics Diagnostics;
|
|
return ParseShader(InSource, Diagnostics);
|
|
}
|
|
}
|
|
|
|
bool FShaderMinifierParserTest::RunTest(const FString& Parameters)
|
|
{
|
|
using namespace UE::ShaderMinifier;
|
|
|
|
TestEqual(TEXT("SkipSpace"),
|
|
FString(SkipSpace(TEXT(" \n\r\f \tHello"))),
|
|
FString(TEXT("Hello")));
|
|
|
|
TestEqual(TEXT("SkipUntilStr (found)"),
|
|
FString(SkipUntilStr(TEXT("Hello World"), TEXT("World"))),
|
|
FString(TEXT("World")));
|
|
|
|
TestEqual(TEXT("SkipUntilStr (not found)"),
|
|
FString(SkipUntilStr(TEXT("Hello World"), TEXT("Blah"))),
|
|
FString());
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("static const struct { int Blah; } Foo = { 123; };"));
|
|
TestEqual(TEXT("Anonymous struct variable with initializer, total chunks"), P.Chunks.Num(), 1);
|
|
if (P.Chunks.Num() == 1)
|
|
{
|
|
TestEqual(TEXT("Anonymous struct variable with initializer, main chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("float4 PSMain() : SV_Target { return float4(1,0,0,1); };"));
|
|
TestEqual(TEXT("Pixel shader entry point, total chunks"), P.Chunks.Num(), 1);
|
|
if (P.Chunks.Num() == 1)
|
|
{
|
|
TestEqual(TEXT("Pixel shader entry point, main chunk type"), P.Chunks[0].Type, ECodeChunkType::Function);
|
|
}
|
|
}
|
|
|
|
{
|
|
TArray<FStringView> R;
|
|
ExtractIdentifiers(TEXT("Hello[World]; Foo[0];\n"), R);
|
|
if (TestEqual(TEXT("ExtractIdentifiers1: Num"), R.Num(), 3))
|
|
{
|
|
TestEqual(TEXT("ExtractIdentifiers1: R[0]"), FString(R[0]), TEXT("Hello"));
|
|
TestEqual(TEXT("ExtractIdentifiers1: R[1]"), FString(R[1]), TEXT("World"));
|
|
TestEqual(TEXT("ExtractIdentifiers1: R[2]"), FString(R[2]), TEXT("Foo"));
|
|
}
|
|
}
|
|
|
|
{
|
|
TArray<FStringView> R;
|
|
ExtractIdentifiers(TEXT("#line 0\nStructuredBuffer<uint4> Blah : register(t0, space123);#line 1\n#pragma foo\n"), R);
|
|
if (TestEqual(TEXT("ExtractIdentifiers2: Num"), R.Num(), 6))
|
|
{
|
|
TestEqual(TEXT("ExtractIdentifiers2: R[0]"), FString(R[0]), TEXT("StructuredBuffer"));
|
|
TestEqual(TEXT("ExtractIdentifiers2: R[1]"), FString(R[1]), TEXT("uint4"));
|
|
TestEqual(TEXT("ExtractIdentifiers2: R[2]"), FString(R[2]), TEXT("Blah"));
|
|
TestEqual(TEXT("ExtractIdentifiers2: R[3]"), FString(R[3]), TEXT("register"));
|
|
TestEqual(TEXT("ExtractIdentifiers2: R[4]"), FString(R[4]), TEXT("t0"));
|
|
TestEqual(TEXT("ExtractIdentifiers2: R[5]"), FString(R[5]), TEXT("space123"));
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("StructuredBuffer<uint4> Blah : register(t0, space123);"));
|
|
if (TestEqual(TEXT("ParseShader: structured buffer: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: structured buffer: chunk"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("const float Foo = 123.45f;"));
|
|
if (TestEqual(TEXT("ParseShader: const float with initializer: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: const float with initializer: chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("struct Blah { int A; };"));
|
|
if (TestEqual(TEXT("ParseShader: struct: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: struct: chunk type"), P.Chunks[0].Type, ECodeChunkType::Struct);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("struct Foo { int FooA; }; struct Bar : Foo { int BarA; };"));
|
|
if (TestEqual(TEXT("ParseShader: inherited struct: num chunks"), P.Chunks.Num(), 2))
|
|
{
|
|
TestEqual(TEXT("ParseShader: inherited struct: chunk 0 type"), P.Chunks[0].Type, ECodeChunkType::Struct);
|
|
TestEqual(TEXT("ParseShader: inherited struct: chunk 1 type"), P.Chunks[1].Type, ECodeChunkType::Struct);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("[numthreads(8,8,1)] void Main() {};"));
|
|
if (TestEqual(TEXT("ParseShader: compute shader entry point: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: compute shader entry point: chunk type"), P.Chunks[0].Type, ECodeChunkType::Function);
|
|
|
|
if (TestEqual(TEXT("ParseShader: compute shader entry point: num blocks"), P.Chunks[0].Blocks.Num(), 5))
|
|
{
|
|
TestEqual(TEXT("ParseShader: compute shader entry point: attribute block type"), P.Chunks[0].Blocks[0].Type, EBlockType::Attribute);
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("Texture2D Blah : register(t0);"));
|
|
if (TestEqual(TEXT("ParseShader: texture with register: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: texture with register: chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
{
|
|
auto P = ParseShader(TEXT("Texture2D Blah;"));
|
|
if (TestEqual(TEXT("ParseShader: texture: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: texture: chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("SamplerState Blah : register(s0, space123);"));
|
|
if (TestEqual(TEXT("ParseShader: sampler state with register: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: sampler state with register: chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
{
|
|
// TODO: handle function forward declarations
|
|
auto P = ParseShader(TEXT("Foo Fun(int a);"));
|
|
TestEqual(TEXT("ParseShader: function forward declaration"), P.Chunks[0].Type, ECodeChunkType::FunctionDecl);
|
|
}
|
|
#endif
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("void Fun(int a) {};"));
|
|
if (TestEqual(TEXT("ParseShader: function with trailing semicolon: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: function with trailing semicolon: chunk type"), P.Chunks[0].Type, ECodeChunkType::Function);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("void Fun(int a) {}"));
|
|
if (TestEqual(TEXT("ParseShader: function: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: function: chunk type"), P.Chunks[0].Type, ECodeChunkType::Function);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("cbuffer Foo {blah} SamplerState S;"));
|
|
|
|
if (TestEqual(TEXT("ParseShader: cbuffer and sampler state: num chunks"), P.Chunks.Num(), 2))
|
|
{
|
|
TestEqual(TEXT("ParseShader: cbuffer and sampler state: chunk type [0]"), P.Chunks[0].Type, ECodeChunkType::CBuffer);
|
|
TestEqual(TEXT("ParseShader: cbuffer and sampler state: chunk type [1]"), P.Chunks[1].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("struct Foo { int a; };"));
|
|
if (TestEqual(TEXT("ParseShader: struct: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: struct: chunk type"), P.Chunks[0].Type, ECodeChunkType::Struct);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("struct { int a; } Foo = { 123; };"));
|
|
if (TestEqual(TEXT("ParseShader: anonymous struct with variable and initializer: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: anonymous struct with variable and initializer: chunk type [0]"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
{
|
|
// TODO: handle struct forward declarations
|
|
auto P = ParseShader(TEXT("struct Foo;"));
|
|
}
|
|
#endif
|
|
|
|
{
|
|
auto P = ParseShader(
|
|
TEXT("cbuffer MyBuffer : register(b3)")
|
|
TEXT("{ float4 Element1 : packoffset(c0); float1 Element2 : packoffset(c1); float1 Element3 : packoffset(c1.y); }"));
|
|
if (TestEqual(TEXT("ParseShader: cbuffer with packoffset: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: cbuffer with packoffset: chunk type"), P.Chunks[0].Type, ECodeChunkType::CBuffer);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("static const struct { float4 Param; } Foo = { FooCB_Param; };"));
|
|
if (TestEqual(TEXT("ParseShader: static const anonymous struct with variable and initializer: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: static const anonymous struct with variable and initializer: chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("template <typename T> float Fun(T x) { return (float)x; }"));
|
|
if (TestEqual(TEXT("ParseShader: template function: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: template function: chunk type"), P.Chunks[0].Type, ECodeChunkType::Function);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("enum EFoo { A, B = 123 };"));
|
|
if (TestEqual(TEXT("ParseShader: enum: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: enum: chunk type"), P.Chunks[0].Type, ECodeChunkType::Enum);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("enum class EFoo { A, B };"));
|
|
if (TestEqual(TEXT("ParseShader: enum class: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: enum class: chunk type"), P.Chunks[0].Type, ECodeChunkType::Enum);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("#define Foo 123"));
|
|
if (TestEqual(TEXT("ParseShader: define: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: define: chunk type"), P.Chunks[0].Type, ECodeChunkType::Define);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("#pragma Foo"));
|
|
if (TestEqual(TEXT("ParseShader: pragma: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: pragma: chunk type"), P.Chunks[0].Type, ECodeChunkType::Pragma);
|
|
}
|
|
}
|
|
|
|
{
|
|
auto P = ParseShader(TEXT("ConstantBuffer<Foo> CB : register ( b123, space456);"));
|
|
if (TestEqual(TEXT("ParseShader: ConstantBuffer<Foo>: num chunks"), P.Chunks.Num(), 1))
|
|
{
|
|
TestEqual(TEXT("ParseShader: ConstantBuffer<Foo>: chunk type"), P.Chunks[0].Type, ECodeChunkType::Variable);
|
|
}
|
|
}
|
|
|
|
int32 NumErrors = ExecutionInfo.GetErrorTotal();
|
|
|
|
return NumErrors == 0;
|
|
}
|
|
|
|
IMPLEMENT_SIMPLE_AUTOMATION_TEST(FShaderMinifierTest, "System.Shaders.ShaderMinifier.Minify", EAutomationTestFlags::EditorContext | EAutomationTestFlags::EngineFilter);
|
|
|
|
bool FShaderMinifierTest::RunTest(const FString& Parameters)
|
|
{
|
|
// TODO: run minifier on some tricky examples
|
|
|
|
int32 NumErrors = ExecutionInfo.GetErrorTotal();
|
|
return NumErrors == 0;
|
|
}
|
|
|
|
#endif // WITH_AUTOMATION_TESTS
|