kc3-lang/angle/src/compiler/ShHandle.h

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• Hash : 76b82085
  Author :
  Date : 2010-03-24T17:59:39
  

  Added GLSL backend for ESSL translator.
  Review URL: http://codereview.appspot.com/698041
  
  git-svn-id: https://angleproject.googlecode.com/svn/trunk@69 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/compiler/ShHandle.h

• //
  // Copyright (c) 2002-2010 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 _SHHANDLE_INCLUDED_
  #define _SHHANDLE_INCLUDED_
  
  //
  // Machine independent part of the compiler private objects
  // sent as ShHandle to the driver.
  //
  // This should not be included by driver code.
  //
  
  #include "GLSLANG/ShaderLang.h"
  
  #include "InfoSink.h"
  
  class TCompiler;
  class TLinker;
  class TUniformMap;
  
  
  //
  // The base class used to back handles returned to the driver.
  //
  class TShHandleBase {
  public:
      TShHandleBase() { }
      virtual ~TShHandleBase() { }
      virtual TCompiler* getAsCompiler() { return 0; }
      virtual TLinker* getAsLinker() { return 0; }
      virtual TUniformMap* getAsUniformMap() { return 0; }
  };
  
  //
  // The base class for the machine dependent linker to derive from
  // for managing where uniforms live.
  //
  class TUniformMap : public TShHandleBase {
  public:
      TUniformMap() { }
      virtual ~TUniformMap() { }
      virtual TUniformMap* getAsUniformMap() { return this; }
      virtual int getLocation(const char* name) = 0;    
      virtual TInfoSink& getInfoSink() { return infoSink; }
      TInfoSink infoSink;
  };
  class TIntermNode;
  
  //
  // The base class for the machine dependent compiler to derive from
  // for managing object code from the compile.
  //
  class TCompiler : public TShHandleBase {
  public:
      TCompiler(EShLanguage l) : language(l), haveValidObjectCode(false) { }
      virtual ~TCompiler() { }
      EShLanguage getLanguage() { return language; }
      virtual TInfoSink& getInfoSink() { return infoSink; }
  
      virtual bool compile(TIntermNode* root) = 0;
  
      virtual TCompiler* getAsCompiler() { return this; }
      virtual bool linkable() { return haveValidObjectCode; }
  
      TInfoSink infoSink;
  protected:
      EShLanguage language;
      bool haveValidObjectCode;
  };
  
  //
  // Link operations are base on a list of compile results...
  //
  typedef TVector<TCompiler*> TCompilerList;
  typedef TVector<TShHandleBase*> THandleList;
  
  //
  // The base class for the machine dependent linker to derive from
  // to manage the resulting executable.
  //
  
  class TLinker : public TShHandleBase {
  public:
      TLinker(EShExecutable e) : 
          executable(e), 
          haveReturnableObjectCode(false),
          appAttributeBindings(0),
          fixedAttributeBindings(0),
          excludedAttributes(0),
          excludedCount(0),
          uniformBindings(0) { }
      virtual TLinker* getAsLinker() { return this; }
      virtual ~TLinker() { }
      virtual bool link(TCompilerList&, TUniformMap*) = 0;
      virtual bool link(THandleList&) { return false; }
      virtual void setAppAttributeBindings(const ShBindingTable* t)   { appAttributeBindings = t; }
      virtual void setFixedAttributeBindings(const ShBindingTable* t) { fixedAttributeBindings = t; }
      virtual void getAttributeBindings(ShBindingTable const **t) const = 0;
      virtual void setExcludedAttributes(const int* attributes, int count) { excludedAttributes = attributes; excludedCount = count; }
      virtual ShBindingTable* getUniformBindings() const  { return uniformBindings; }
      virtual const void* getObjectCode() const { return 0; } // a real compiler would be returning object code here
      virtual TInfoSink& getInfoSink() { return infoSink; }
      TInfoSink infoSink;
  protected:
      EShExecutable executable;
      bool haveReturnableObjectCode;  // true when objectCode is acceptable to send to driver
  
      const ShBindingTable* appAttributeBindings;
      const ShBindingTable* fixedAttributeBindings;
      const int* excludedAttributes;
      int excludedCount;
      ShBindingTable* uniformBindings;                // created by the linker    
  };
  
  //
  // This is the interface between the machine independent code
  // and the machine dependent code.
  //
  // The machine dependent code should derive from the classes
  // above. Then Construct*() and Delete*() will create and 
  // destroy the machine dependent objects, which contain the
  // above machine independent information.
  //
  TCompiler* ConstructCompiler(EShLanguage, int);
  
  TShHandleBase* ConstructLinker(EShExecutable, int);
  void DeleteLinker(TShHandleBase*);
  
  TUniformMap* ConstructUniformMap();
  void DeleteCompiler(TCompiler*);
  
  void DeleteUniformMap(TUniformMap*);
  
  #endif // _SHHANDLE_INCLUDED_
  

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