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

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• Author : Jamie Madill
  Date : 2013-08-26 15:29:29
  Hash : 96b67e39
  Message : Make gl::Buffer::size() a const method. R=geofflang@chromium.org, shannonwoods@chromium.org ANGLEBUG=467 Review URL: https://codereview.appspot.com/12937045 Test=WebGL CTS 1.0.2

• src/libGLESv2/Buffer.cpp

• #include "precompiled.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.
  //
  
  // Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or
  // index data. Implements GL buffer objects and related functionality.
  // [OpenGL ES 2.0.24] section 2.9 page 21.
  
  #include "libGLESv2/Buffer.h"
  
  #include "libGLESv2/renderer/VertexBuffer.h"
  #include "libGLESv2/renderer/IndexBuffer.h"
  #include "libGLESv2/renderer/BufferStorage.h"
  #include "libGLESv2/renderer/Renderer.h"
  
  namespace gl
  {
  
  Buffer::Buffer(rx::Renderer *renderer, GLuint id) : RefCountObject(id)
  {
      mRenderer = renderer;
      mUsage = GL_DYNAMIC_DRAW;
  
      mBufferStorage = renderer->createBufferStorage();
      mStaticVertexBuffer = NULL;
      mStaticIndexBuffer = NULL;
      mUnmodifiedDataUse = 0;
  }
  
  Buffer::~Buffer()
  {
      delete mBufferStorage;
      delete mStaticVertexBuffer;
      delete mStaticIndexBuffer;
  }
  
  void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
  {
      mBufferStorage->clear();
      mIndexRangeCache.clear();
      mBufferStorage->setData(data, size, 0);
  
      mUsage = usage;
  
      invalidateStaticData();
  
      if (usage == GL_STATIC_DRAW)
      {
          mStaticVertexBuffer = new rx::StaticVertexBufferInterface(mRenderer);
          mStaticIndexBuffer = new rx::StaticIndexBufferInterface(mRenderer);
      }
  }
  
  void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
  {
      mBufferStorage->setData(data, size, offset);
      mIndexRangeCache.invalidateRange(offset, size);
  
      if ((mStaticVertexBuffer && mStaticVertexBuffer->getBufferSize() != 0) || (mStaticIndexBuffer && mStaticIndexBuffer->getBufferSize() != 0))
      {
          invalidateStaticData();
      }
  
      mUnmodifiedDataUse = 0;
  }
  
  void Buffer::copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
  {
      mBufferStorage->copyData(source->mBufferStorage, size, sourceOffset, destOffset);
  
      if ((mStaticVertexBuffer && mStaticVertexBuffer->getBufferSize() != 0) || (mStaticIndexBuffer && mStaticIndexBuffer->getBufferSize() != 0))
      {
          invalidateStaticData();
      }
  
      mUnmodifiedDataUse = 0;
  }
  
  rx::BufferStorage *Buffer::getStorage() const
  {
      return mBufferStorage;
  }
  
  unsigned int Buffer::size() const
  {
      return mBufferStorage->getSize();
  }
  
  GLenum Buffer::usage() const
  {
      return mUsage;
  }
  
  rx::StaticVertexBufferInterface *Buffer::getStaticVertexBuffer()
  {
      return mStaticVertexBuffer;
  }
  
  rx::StaticIndexBufferInterface *Buffer::getStaticIndexBuffer()
  {
      return mStaticIndexBuffer;
  }
  
  void Buffer::invalidateStaticData()
  {
      delete mStaticVertexBuffer;
      mStaticVertexBuffer = NULL;
  
      delete mStaticIndexBuffer;
      mStaticIndexBuffer = NULL;
  
      mUnmodifiedDataUse = 0;
  }
  
  // Creates static buffers if sufficient used data has been left unmodified
  void Buffer::promoteStaticUsage(int dataSize)
  {
      if (!mStaticVertexBuffer && !mStaticIndexBuffer)
      {
          mUnmodifiedDataUse += dataSize;
  
          if (mUnmodifiedDataUse > 3 * mBufferStorage->getSize())
          {
              mStaticVertexBuffer = new rx::StaticVertexBufferInterface(mRenderer);
              mStaticIndexBuffer = new rx::StaticIndexBufferInterface(mRenderer);
          }
      }
  }
  
  rx::IndexRangeCache *Buffer::getIndexRangeCache()
  {
      return &mIndexRangeCache;
  }
  
  }