kc3-lang/angle/src/compiler/translator/OutputGLSLBase.h

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• Hash : 6f80f0f0
  Author :
  Date : 2022-08-06T02:29:19
  

  Translator: Clean up the compile flag passing interface
  
  Historically, compile flags were sent to the translator as a bitmask.
  Recently, we were getting close to running out of bits.  Additionally,
  direct-to-metal work had started to introduce constants to be passed to
  the translator, which were misplaced in ShBuiltInResources and Caps.
  Recent work on Pixel Local Storage adds even more constants, aggravating
  the situation.
  
  In this change, the interface to passing compile flags is reworked.  A
  struct is passed (instead of a bitmask) that has one bit for each flag.
  This can be indefinitely extended.  Additionally, the constants needed
  by metal and PLS are also placed in this struct.  In turn, the backends
  can set these options directly, and don't have to hack them into Caps to
  further get hacked into ShBuiltInResources.
  
  Bug: angleproject:7559
  Change-Id: If93f1e1b8818ad3a0ac708ab04ab93b4b397d114
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3812562
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>
  Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com>
  Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/compiler/translator/OutputGLSLBase.h

• //
  // Copyright 2002 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef COMPILER_TRANSLATOR_OUTPUTGLSLBASE_H_
  #define COMPILER_TRANSLATOR_OUTPUTGLSLBASE_H_
  
  #include <set>
  
  #include "compiler/translator/ExtensionBehavior.h"
  #include "compiler/translator/HashNames.h"
  #include "compiler/translator/InfoSink.h"
  #include "compiler/translator/Pragma.h"
  #include "compiler/translator/tree_util/IntermTraverse.h"
  
  namespace sh
  {
  class TCompiler;
  
  class TOutputGLSLBase : public TIntermTraverser
  {
    public:
      TOutputGLSLBase(TCompiler *compiler,
                      TInfoSinkBase &objSink,
                      const ShCompileOptions &compileOptions);
  
      ShShaderOutput getShaderOutput() const { return mOutput; }
  
      // Return the original name if hash function pointer is NULL;
      // otherwise return the hashed name. Has special handling for internal names and built-ins,
      // which are not hashed.
      ImmutableString hashName(const TSymbol *symbol);
  
    protected:
      TInfoSinkBase &objSink() { return mObjSink; }
      void writeFloat(TInfoSinkBase &out, float f);
      void writeTriplet(Visit visit, const char *preStr, const char *inStr, const char *postStr);
      std::string getCommonLayoutQualifiers(TIntermSymbol *variable);
      std::string getMemoryQualifiers(const TType &type);
      virtual void writeLayoutQualifier(TIntermSymbol *variable);
      void writeFieldLayoutQualifier(const TField *field);
      void writeInvariantQualifier(const TType &type);
      void writePreciseQualifier(const TType &type);
      virtual void writeVariableType(const TType &type,
                                     const TSymbol *symbol,
                                     bool isFunctionArgument);
      virtual bool writeVariablePrecision(TPrecision precision) = 0;
      void writeFunctionParameters(const TFunction *func);
      const TConstantUnion *writeConstantUnion(const TType &type, const TConstantUnion *pConstUnion);
      void writeConstructorTriplet(Visit visit, const TType &type);
      ImmutableString getTypeName(const TType &type);
  
      void visitSymbol(TIntermSymbol *node) override;
      void visitConstantUnion(TIntermConstantUnion *node) override;
      bool visitSwizzle(Visit visit, TIntermSwizzle *node) override;
      bool visitBinary(Visit visit, TIntermBinary *node) override;
      bool visitUnary(Visit visit, TIntermUnary *node) override;
      bool visitTernary(Visit visit, TIntermTernary *node) override;
      bool visitIfElse(Visit visit, TIntermIfElse *node) override;
      bool visitSwitch(Visit visit, TIntermSwitch *node) override;
      bool visitCase(Visit visit, TIntermCase *node) override;
      void visitFunctionPrototype(TIntermFunctionPrototype *node) override;
      bool visitFunctionDefinition(Visit visit, TIntermFunctionDefinition *node) override;
      bool visitAggregate(Visit visit, TIntermAggregate *node) override;
      bool visitBlock(Visit visit, TIntermBlock *node) override;
      bool visitGlobalQualifierDeclaration(Visit visit,
                                           TIntermGlobalQualifierDeclaration *node) override;
      bool visitDeclaration(Visit visit, TIntermDeclaration *node) override;
      bool visitLoop(Visit visit, TIntermLoop *node) override;
      bool visitBranch(Visit visit, TIntermBranch *node) override;
      void visitPreprocessorDirective(TIntermPreprocessorDirective *node) override;
  
      void visitCodeBlock(TIntermBlock *node);
  
      ImmutableString hashFieldName(const TField *field);
      // Same as hashName(), but without hashing "main".
      ImmutableString hashFunctionNameIfNeeded(const TFunction *func);
      // Used to translate function names for differences between ESSL and GLSL
      virtual ImmutableString translateTextureFunction(const ImmutableString &name,
                                                       const ShCompileOptions &option)
      {
          return name;
      }
  
      void declareStruct(const TStructure *structure);
      void writeQualifier(TQualifier qualifier, const TType &type, const TSymbol *symbol);
  
      const char *mapQualifierToString(TQualifier qualifier);
  
      sh::GLenum getShaderType() const { return mShaderType; }
      bool isHighPrecisionSupported() const { return mHighPrecisionSupported; }
      const char *getIndentPrefix(int extraIndentDepth = 0);
  
    private:
      void declareInterfaceBlockLayout(const TType &type);
      void declareInterfaceBlock(const TType &type);
  
      void writeFunctionTriplet(Visit visit,
                                const ImmutableString &functionName,
                                bool useEmulatedFunction);
  
      TInfoSinkBase &mObjSink;
      bool mDeclaringVariable;
  
      // name hashing.
      ShHashFunction64 mHashFunction;
      NameMap &mNameMap;
  
      sh::GLenum mShaderType;
      const int mShaderVersion;
      ShShaderOutput mOutput;
  
      bool mHighPrecisionSupported;
  
      const ShCompileOptions &mCompileOptions;
  };
  
  void WritePragma(TInfoSinkBase &out, const ShCompileOptions &compileOptions, const TPragma &pragma);
  
  void WriteGeometryShaderLayoutQualifiers(TInfoSinkBase &out,
                                           sh::TLayoutPrimitiveType inputPrimitive,
                                           int invocations,
                                           sh::TLayoutPrimitiveType outputPrimitive,
                                           int maxVertices);
  
  void WriteTessControlShaderLayoutQualifiers(TInfoSinkBase &out, int inputVertices);
  
  void WriteTessEvaluationShaderLayoutQualifiers(TInfoSinkBase &out,
                                                 sh::TLayoutTessEvaluationType inputPrimitive,
                                                 sh::TLayoutTessEvaluationType inputVertexSpacing,
                                                 sh::TLayoutTessEvaluationType inputOrdering,
                                                 sh::TLayoutTessEvaluationType inputPoint);
  
  bool NeedsToWriteLayoutQualifier(const TType &type);
  
  void EmitEarlyFragmentTestsGLSL(const TCompiler &, TInfoSinkBase &sink);
  void EmitWorkGroupSizeGLSL(const TCompiler &, TInfoSinkBase &sink);
  void EmitMultiviewGLSL(const TCompiler &,
                         const ShCompileOptions &,
                         const TExtension,
                         const TBehavior,
                         TInfoSinkBase &sink);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_OUTPUTGLSLBASE_H_
  

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