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

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• Hash : 2aeb26a4
  Author :
  Date : 2013-07-08T14:02:55
  

  Added support for EXT_frag_depth
  
  This change also required that support be added for associating built-in
  variables with an extension, similar to how functions could be associated with
  extensions previously.
  
  R=alokp@chromium.org
  
  Review URL: https://codereview.appspot.com/9827044
  
  git-svn-id: https://angleproject.googlecode.com/svn/trunk@2248 736b8ea6-26fd-11df-bfd4-992fa37f6226
  
  TRAC #23333
  Authored-by: bajones@chromium.org
  Signed-off-by: Shannon Woods
  Signed-off-by Nicolas Capens
  Merged-by: Jamie Madill
  

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• src/libGLESv2/Shader.h

• //
  // Copyright (c) 2002-2013 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 <GLES3/gl3.h>
  #include <GLES2/gl2.h>
  #include <string>
  #include <list>
  #include <vector>
  
  #include "compiler/Uniform.h"
  #include "common/angleutils.h"
  
  namespace rx
  {
  class Renderer;
  }
  
  namespace gl
  {
  class ResourceManager;
  
  enum Interpolation
  {
      Smooth,
      Centroid,
      Flat
  };
  
  struct Varying
  {
      Varying(Interpolation interpolation, GLenum type, const std::string &name, int size, bool array)
          : interpolation(interpolation), type(type), name(name), size(size), array(array), reg(-1), col(-1)
      {
      }
  
      Interpolation interpolation;
      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 class ProgramBinary;
  
    public:
      Shader(ResourceManager *manager, const rx::Renderer *renderer, GLuint handle);
  
      virtual ~Shader();
  
      virtual GLenum getType() = 0;
      GLuint getHandle() const;
  
      void deleteSource();
      void setSource(GLsizei count, const char *const *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);
      const sh::ActiveUniforms &getUniforms();
      const sh::ActiveInterfaceBlocks &getInterfaceBlocks();
  
      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();
      int getShaderVersion() const;
  
      static void releaseCompiler();
  
    protected:
      void parseVaryings();
      void resetVaryingsRegisterAssignment();
  
      void compileToHLSL(void *compiler);
  
      void getSourceImpl(char *source, GLsizei bufSize, GLsizei *length, char *buffer);
  
      static Interpolation parseInterpolation(const std::string &type);
      static GLenum parseType(const std::string &type);
      static bool compareVarying(const Varying &x, const Varying &y);
  
      const rx::Renderer *const mRenderer;
  
      VaryingList mVaryings;
  
      bool mUsesMultipleRenderTargets;
      bool mUsesFragColor;
      bool mUsesFragData;
      bool mUsesFragCoord;
      bool mUsesFrontFacing;
      bool mUsesPointSize;
      bool mUsesPointCoord;
      bool mUsesDepthRange;
      bool mUsesFragDepth;
      int mShaderVersion;
  
      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;
      sh::ActiveUniforms mActiveUniforms;
      sh::ActiveInterfaceBlocks mActiveInterfaceBlocks;
  
      ResourceManager *mResourceManager;
  };
  
  class VertexShader : public Shader
  {
      friend class ProgramBinary;
  
    public:
      VertexShader(ResourceManager *manager, const rx::Renderer *renderer, 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();
  
      sh::ActiveShaderVariables mActiveAttributes;
  };
  
  class FragmentShader : public Shader
  {
    public:
      FragmentShader(ResourceManager *manager,const rx::Renderer *renderer, GLuint handle);
  
      ~FragmentShader();
  
      virtual GLenum getType();
      virtual void compile();
      virtual void uncompile();
      const sh::ActiveShaderVariables &getOutputVariables() const;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(FragmentShader);
  
      sh::ActiveShaderVariables mActiveOutputVariables;
  };
  }
  
  #endif   // LIBGLESV2_SHADER_H_
  

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