kc3-lang/angle/src/libGLESv2/Shader.h

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• Author : daniel@transgaming.com
  Date : 2012-02-17 18:02:20
  Hash : 0725e7df
  Message : Support reloading the shader compiler Trac #19900 Issue=291 - Move compiler initialization to a separate function - all this function to ensure the compiler is loaded when a compile is attempted (previously if the compiler was released, you'd have to create a new shader object to get it reloaded). Signed-off-by: Shannon Woods Signed-off-by: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@992 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/libGLESv2/Shader.h

• //
  // Copyright (c) 2002-2012 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.
  //
  
  // Shader.h: Defines the abstract gl::Shader class and its concrete derived
  // classes VertexShader and FragmentShader. Implements GL shader objects and
  // related functionality. [OpenGL ES 2.0.24] section 2.10 page 24 and section
  // 3.8 page 84.
  
  #ifndef LIBGLESV2_SHADER_H_
  #define LIBGLESV2_SHADER_H_
  
  #define GL_APICALL
  #include <GLES2/gl2.h>
  #include <d3dx9.h>
  #include <list>
  #include <vector>
  
  #include "libGLESv2/ResourceManager.h"
  
  namespace gl
  {
  struct Varying
  {
      Varying(GLenum type, const std::string &name, int size, bool array)
          : type(type), name(name), size(size), array(array), reg(-1), col(-1)
      {
      }
  
      GLenum type;
      std::string name;
      int size;   // Number of 'type' elements
      bool array;
  
      int reg;    // First varying register, assigned during link
      int col;    // First register element, assigned during link
  };
  
  typedef std::list<Varying> VaryingList;
  
  class Shader
  {
      friend Program;
  
    public:
      Shader(ResourceManager *manager, GLuint handle);
  
      virtual ~Shader();
  
      virtual GLenum getType() = 0;
      GLuint getHandle() const;
  
      void deleteSource();
      void setSource(GLsizei count, const char **string, const GLint *length);
      int getInfoLogLength() const;
      void getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog);
      int getSourceLength() const;
      void getSource(GLsizei bufSize, GLsizei *length, char *buffer);
      int getTranslatedSourceLength() const;
      void getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer);
  
      virtual void compile() = 0;
      virtual void uncompile();
      bool isCompiled();
      const char *getHLSL();
  
      void addRef();
      void release();
      unsigned int getRefCount() const;
      bool isFlaggedForDeletion() const;
      void flagForDeletion();
  
      static void releaseCompiler();
  
    protected:
      void parseVaryings();
  
      void compileToHLSL(void *compiler);
  
      void getSourceImpl(char *source, GLsizei bufSize, GLsizei *length, char *buffer);
  
      static GLenum parseType(const std::string &type);
      static bool compareVarying(const Varying &x, const Varying &y);
  
      VaryingList mVaryings;
  
      bool mUsesFragCoord;
      bool mUsesFrontFacing;
      bool mUsesPointSize;
      bool mUsesPointCoord;
  
      static void *mFragmentCompiler;
      static void *mVertexCompiler;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Shader);
  
      void initializeCompiler();
  
      const GLuint mHandle;
      unsigned int mRefCount;     // Number of program objects this shader is attached to
      bool mDeleteStatus;         // Flag to indicate that the shader can be deleted when no longer in use
  
      char *mSource;
      char *mHlsl;
      char *mInfoLog;
  
      ResourceManager *mResourceManager;
  };
  
  struct Attribute
  {
      Attribute() : type(GL_NONE), name("")
      {
      }
  
      Attribute(GLenum type, const std::string &name) : type(type), name(name)
      {
      }
  
      GLenum type;
      std::string name;
  };
  
  typedef std::vector<Attribute> AttributeArray;
  
  class VertexShader : public Shader
  {
      friend Program;
  
    public:
      VertexShader(ResourceManager *manager, GLuint handle);
  
      ~VertexShader();
  
      virtual GLenum getType();
      virtual void compile();
      virtual void uncompile();
      int getSemanticIndex(const std::string &attributeName);
  
    private:
      DISALLOW_COPY_AND_ASSIGN(VertexShader);
  
      void parseAttributes();
  
      AttributeArray mAttributes;
  };
  
  class FragmentShader : public Shader
  {
    public:
      FragmentShader(ResourceManager *manager, GLuint handle);
  
      ~FragmentShader();
  
      virtual GLenum getType();
      virtual void compile();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(FragmentShader);
  };
  }
  
  #endif   // LIBGLESV2_SHADER_H_