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

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• Hash : fbb1c792
  Author :
  Date : 2018-01-19T16:26:59
  

  Store symbol names as a ImmutableString
  
  This will enable compile-time initialization of built-in symbols as
  well as reducing copying strings.
  
  Most of the code that deals with names is changed to use
  ImmutableString where it makes sense to avoid conversions.
  
  The lexer/parser now allocate const char pointers into pool memory
  instead of allocating TStrings. These are then converted to
  ImmutableString upon entering TParseContext.
  
  BUG=angleproject:2267
  TEST=angle_unittests, angle_end2end_tests
  
  Change-Id: I244d6271ea1ecf7150d4f89dfa388a7745a1150c
  Reviewed-on: https://chromium-review.googlesource.com/881561
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/compiler/translator/EmulatePrecision.h

• //
  // Copyright (c) 2002-2014 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_EMULATE_PRECISION_H_
  #define COMPILER_TRANSLATOR_EMULATE_PRECISION_H_
  
  #include "GLSLANG/ShaderLang.h"
  #include "common/angleutils.h"
  #include "compiler/translator/Compiler.h"
  #include "compiler/translator/InfoSink.h"
  #include "compiler/translator/IntermTraverse.h"
  
  // This class gathers all compound assignments from the AST and can then write
  // the functions required for their precision emulation. This way there is no
  // need to write a huge number of variations of the emulated compound assignment
  // to every translated shader with emulation enabled.
  
  namespace sh
  {
  
  class EmulatePrecision : public TLValueTrackingTraverser
  {
    public:
      EmulatePrecision(TSymbolTable *symbolTable);
  
      void visitSymbol(TIntermSymbol *node) override;
      bool visitBinary(Visit visit, TIntermBinary *node) override;
      bool visitUnary(Visit visit, TIntermUnary *node) override;
      bool visitAggregate(Visit visit, TIntermAggregate *node) override;
      bool visitInvariantDeclaration(Visit visit, TIntermInvariantDeclaration *node) override;
      bool visitDeclaration(Visit visit, TIntermDeclaration *node) override;
      bool visitFunctionPrototype(Visit visit, TIntermFunctionPrototype *node) override;
  
      void writeEmulationHelpers(TInfoSinkBase &sink,
                                 const int shaderVersion,
                                 const ShShaderOutput outputLanguage);
  
      static bool SupportedInLanguage(const ShShaderOutput outputLanguage);
  
    private:
      struct TypePair
      {
          TypePair(const char *l, const char *r) : lType(l), rType(r) {}
  
          const char *lType;
          const char *rType;
      };
  
      struct TypePairComparator
      {
          bool operator()(const TypePair &l, const TypePair &r) const
          {
              if (l.lType == r.lType)
                  return l.rType < r.rType;
              return l.lType < r.lType;
          }
      };
  
      const TFunction *getInternalFunction(const ImmutableString &functionName,
                                           const TType &returnType,
                                           TIntermSequence *arguments,
                                           const TVector<TConstParameter> &parameters,
                                           bool knownToNotHaveSideEffects);
      TIntermAggregate *createRoundingFunctionCallNode(TIntermTyped *roundedChild);
      TIntermAggregate *createCompoundAssignmentFunctionCallNode(TIntermTyped *left,
                                                                 TIntermTyped *right,
                                                                 const char *opNameStr);
  
      typedef std::set<TypePair, TypePairComparator> EmulationSet;
      EmulationSet mEmulateCompoundAdd;
      EmulationSet mEmulateCompoundSub;
      EmulationSet mEmulateCompoundMul;
      EmulationSet mEmulateCompoundDiv;
  
      // Map from mangled name to function.
      TMap<ImmutableString, const TFunction *> mInternalFunctions;
  
      bool mDeclaringVariables;
  };
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_EMULATE_PRECISION_H_
  

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