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

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• Author : Brandon Jones
  Date : 2014-08-27 15:24:07
  Hash : f05cdee4
  Message : Refactoring Shader objects (Take 2) This change refactors shaders to no longer be dependent on D3D-only concepts. BUG=angle:731 Change-Id: I1006112f1d31b7e41bd14bd3225ea157b7d6c6c9 Reviewed-on: https://chromium-review.googlesource.com/214467 Tested-by: Brandon Jones <bajones@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/libGLESv2/Shader.cpp

• #include "precompiled.h"
  //
  // Copyright (c) 2002-2014 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.cpp: Implements the gl::Shader class and its  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.
  
  #include "libGLESv2/Shader.h"
  
  #include "GLSLANG/ShaderLang.h"
  #include "common/utilities.h"
  #include "libGLESv2/renderer/Renderer.h"
  #include "libGLESv2/renderer/ShaderImpl.h"
  #include "libGLESv2/Constants.h"
  #include "libGLESv2/ResourceManager.h"
  
  namespace gl
  {
  
  Shader::Shader(ResourceManager *manager, rx::ShaderImpl *impl, GLenum type, GLuint handle)
      : mShader(impl),
        mType(type),
        mHandle(handle),
        mResourceManager(manager),
        mRefCount(0),
        mDeleteStatus(false),
        mCompiled(false)
  {
  }
  
  Shader::~Shader()
  {
  }
  
  GLuint Shader::getHandle() const
  {
      return mHandle;
  }
  
  void Shader::setSource(GLsizei count, const char *const *string, const GLint *length)
  {
      std::ostringstream stream;
  
      for (int i = 0; i < count; i++)
      {
          stream << string[i];
      }
  
      mSource = stream.str();
  }
  
  int Shader::getInfoLogLength() const
  {
      return  mShader->getInfoLog().empty() ? 0 : (mShader->getInfoLog().length() + 1);
  }
  
  void Shader::getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog) const
  {
      int index = 0;
  
      if (bufSize > 0)
      {
          index = std::min(bufSize - 1, static_cast<GLsizei>(mShader->getInfoLog().length()));
          memcpy(infoLog, mShader->getInfoLog().c_str(), index);
  
          infoLog[index] = '\0';
      }
  
      if (length)
      {
          *length = index;
      }
  }
  
  int Shader::getSourceLength() const
  {
      return mSource.empty() ? 0 : (mSource.length() + 1);
  }
  
  int Shader::getTranslatedSourceLength() const
  {
      return mShader->getTranslatedSource().empty() ? 0 : (mShader->getTranslatedSource().length() + 1);
  }
  
  void Shader::getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer)
  {
      int index = 0;
  
      if (bufSize > 0)
      {
          index = std::min(bufSize - 1, static_cast<GLsizei>(source.length()));
          memcpy(buffer, source.c_str(), index);
  
          buffer[index] = '\0';
      }
  
      if (length)
      {
          *length = index;
      }
  }
  
  void Shader::getSource(GLsizei bufSize, GLsizei *length, char *buffer) const
  {
      getSourceImpl(mSource, bufSize, length, buffer);
  }
  
  void Shader::getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer) const
  {
      getSourceImpl(mShader->getTranslatedSource(), bufSize, length, buffer);
  }
  
  void Shader::compile()
  {
      mCompiled = mShader->compile(mSource);
  }
  
  void Shader::addRef()
  {
      mRefCount++;
  }
  
  void Shader::release()
  {
      mRefCount--;
  
      if (mRefCount == 0 && mDeleteStatus)
      {
          mResourceManager->deleteShader(mHandle);
      }
  }
  
  unsigned int Shader::getRefCount() const
  {
      return mRefCount;
  }
  
  bool Shader::isFlaggedForDeletion() const
  {
      return mDeleteStatus;
  }
  
  void Shader::flagForDeletion()
  {
      mDeleteStatus = true;
  }
  
  VertexShader::VertexShader(ResourceManager *manager, rx::ShaderImpl *impl, GLuint handle)
      : Shader(manager, impl, GL_VERTEX_SHADER, handle)
  {
  }
  
  VertexShader::~VertexShader()
  {
  }
  
  FragmentShader::FragmentShader(ResourceManager *manager, rx::ShaderImpl *impl, GLuint handle)
      : Shader(manager, impl, GL_FRAGMENT_SHADER, handle)
  {
  }
  
  FragmentShader::~FragmentShader()
  {
  }
  
  }