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

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• Author : Geoff Lang
  Date : 2014-11-05 13:27:06
  Hash : 492a7e43
  Message : Encapulate the ESSL compiler into a GL object that is per-context. * Allows for multiple contexts have to have different client versions, caps and extensions without causing shader compilation failures. BUG=angle:823 Change-Id: I523679e90be031b0b7fa385d46d6839b1cf3029f Reviewed-on: https://chromium-review.googlesource.com/227710 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• src/libANGLE/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 LIBANGLE_SHADER_H_
  #define LIBANGLE_SHADER_H_
  
  #include <string>
  #include <list>
  #include <vector>
  
  #include "angle_gl.h"
  #include <GLSLANG/ShaderLang.h>
  
  #include "common/angleutils.h"
  #include "libANGLE/angletypes.h"
  
  namespace rx
  {
  class ShaderImpl;
  }
  
  namespace gl
  {
  class Compiler;
  class ResourceManager;
  struct Data;
  
  struct PackedVarying : public sh::Varying
  {
      unsigned int registerIndex; // Assigned during link
      unsigned int columnIndex; // Assigned during link, defaults to 0
  
      PackedVarying(const sh::Varying &varying)
        : sh::Varying(varying),
          registerIndex(GL_INVALID_INDEX),
          columnIndex(0)
      {}
  
      bool registerAssigned() const { return registerIndex != GL_INVALID_INDEX; }
      bool isBuiltIn() const { return name.compare(0, 3, "gl_") == 0; }
  
      void resetRegisterAssignment()
      {
          registerIndex = GL_INVALID_INDEX;
      }
  };
  
  class Shader
  {
    public:
      Shader(ResourceManager *manager, rx::ShaderImpl *impl, GLenum type, GLuint handle);
  
      virtual ~Shader();
  
      GLenum getType() const { return mType; }
      GLuint getHandle() const;
  
      rx::ShaderImpl *getImplementation() { return mShader; }
      const rx::ShaderImpl *getImplementation() const { return mShader; }
  
      void deleteSource();
      void setSource(GLsizei count, const char *const *string, const GLint *length);
      int getInfoLogLength() const;
      void getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog) const;
      int getSourceLength() const;
      void getSource(GLsizei bufSize, GLsizei *length, char *buffer) const;
      int getTranslatedSourceLength() const;
      void getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer) const;
      void getTranslatedSourceWithDebugInfo(GLsizei bufSize, GLsizei *length, char *buffer) const;
  
      void compile(Compiler *compiler);
      bool isCompiled() const { return mCompiled; }
  
      void addRef();
      void release();
      unsigned int getRefCount() const;
      bool isFlaggedForDeletion() const;
      void flagForDeletion();
  
      const std::vector<gl::PackedVarying> &getVaryings() const;
      const std::vector<sh::Uniform> &getUniforms() const;
      const std::vector<sh::InterfaceBlock> &getInterfaceBlocks() const;
      const std::vector<sh::Attribute> &getActiveAttributes() const;
      const std::vector<sh::Attribute> &getActiveOutputVariables() const;
  
      std::vector<gl::PackedVarying> &getVaryings();
      std::vector<sh::Uniform> &getUniforms();
      std::vector<sh::InterfaceBlock> &getInterfaceBlocks();
      std::vector<sh::Attribute> &getActiveAttributes();
      std::vector<sh::Attribute> &getActiveOutputVariables();
  
      int getSemanticIndex(const std::string &attributeName) const;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Shader);
  
      static void getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer);
  
      rx::ShaderImpl *mShader;
      const GLuint mHandle;
      const GLenum mType;
      std::string mSource;
      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
      bool mCompiled;             // Indicates if this shader has been successfully compiled
  
      ResourceManager *mResourceManager;
  };
  
  }
  
  #endif   // LIBANGLE_SHADER_H_