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      1 //
      2 // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
      3 // Use of this source code is governed by a BSD-style license that can be
      4 // found in the LICENSE file.
      5 //
      6 // StructureHLSL.h:
      7 //   Interfaces of methods for HLSL translation of GLSL structures.
      8 //
      9 
     10 #ifndef TRANSLATOR_STRUCTUREHLSL_H_
     11 #define TRANSLATOR_STRUCTUREHLSL_H_
     12 
     13 #include "compiler/translator/Common.h"
     14 #include "compiler/translator/IntermNode.h"
     15 
     16 #include <set>
     17 
     18 class TInfoSinkBase;
     19 class TScopeBracket;
     20 
     21 namespace sh
     22 {
     23 
     24 // This helper class assists structure and interface block definitions in determining
     25 // how to pack std140 structs within HLSL's packing rules.
     26 class Std140PaddingHelper
     27 {
     28   public:
     29     explicit Std140PaddingHelper(const std::map<TString, int> &structElementIndexes,
     30                                  unsigned *uniqueCounter);
     31 
     32     int elementIndex() const { return mElementIndex; }
     33     int prePadding(const TType &type);
     34     TString prePaddingString(const TType &type);
     35     TString postPaddingString(const TType &type, bool useHLSLRowMajorPacking);
     36 
     37   private:
     38     TString next();
     39 
     40     unsigned *mPaddingCounter;
     41     int mElementIndex;
     42     const std::map<TString, int> &mStructElementIndexes;
     43 };
     44 
     45 class StructureHLSL
     46 {
     47   public:
     48     StructureHLSL();
     49 
     50     void addConstructor(const TType &type, const TString &name, const TIntermSequence *parameters);
     51     std::string structsHeader() const;
     52 
     53     TString defineQualified(const TStructure &structure, bool useHLSLRowMajorPacking, bool useStd140Packing);
     54     static TString defineNameless(const TStructure &structure);
     55 
     56     Std140PaddingHelper getPaddingHelper();
     57 
     58   private:
     59     unsigned mUniquePaddingCounter;
     60 
     61     std::map<TString, int> mStd140StructElementIndexes;
     62 
     63     typedef std::set<TString> StructNames;
     64     StructNames mStructNames;
     65 
     66     typedef std::set<TString> Constructors;
     67     Constructors mConstructors;
     68 
     69     typedef std::vector<TString> StructDeclarations;
     70     StructDeclarations mStructDeclarations;
     71 
     72     void storeStd140ElementIndex(const TStructure &structure, bool useHLSLRowMajorPacking);
     73     static TString define(const TStructure &structure, bool useHLSLRowMajorPacking,
     74                          bool useStd140Packing, Std140PaddingHelper *padHelper);
     75 };
     76 
     77 }
     78 
     79 #endif // COMPILER_STRUCTUREHLSL_H_
     80