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

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• Author : Jamie Madill
  Date : 2014-03-05 15:01:26
  Hash : 70656a64
  Message : Implement queries and enums for buffer mapping. GetBufferPointerv, GetBufferParameteri64v, and new values for GetBufferParameteriv. BUG=angle:565 Change-Id: I179a3193987b2bff1b0628e47f6a0d627541b0cf Reviewed-on: https://chromium-review.googlesource.com/188203 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

• src/libGLESv2/Buffer.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.
  //
  
  // 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),
        mAccessFlags(0),
        mMapped(GL_FALSE),
        mMapPointer(NULL),
        mMapOffset(0),
        mMapLength(0),
        mBufferStorage(NULL),
        mStaticVertexBuffer(NULL),
        mStaticIndexBuffer(NULL),
        mUnmodifiedDataUse(0)
  {
      mBufferStorage = renderer->createBufferStorage();
  }
  
  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);
      invalidateStaticData();
  }
  
  void Buffer::copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
  {
      mBufferStorage->copyData(source->mBufferStorage, size, sourceOffset, destOffset);
      invalidateStaticData();
  }
  
  GLvoid *Buffer::mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access)
  {
      ASSERT(!mMapped);
  
      void *dataPointer = mBufferStorage->map(access);
  
      mMapped = GL_TRUE;
      mMapPointer = static_cast<GLvoid*>(static_cast<GLubyte*>(dataPointer) + offset);
      mMapOffset = static_cast<GLint64>(offset);
      mMapLength = static_cast<GLint64>(length);
      mAccessFlags = static_cast<GLint>(access);
  
      return mMapPointer;
  }
  
  void Buffer::unmap()
  {
      ASSERT(mMapped);
  
      mBufferStorage->unmap();
  
      mMapped = GL_FALSE;
      mMapPointer = NULL;
      mMapOffset = 0;
      mMapLength = 0;
      mAccessFlags = 0;
  }
  
  rx::BufferStorage *Buffer::getStorage() const
  {
      return mBufferStorage;
  }
  
  GLint64 Buffer::size() const
  {
      return static_cast<GLint64>(mBufferStorage->getSize());
  }
  
  GLenum Buffer::usage() const
  {
      return mUsage;
  }
  
  GLint Buffer::accessFlags() const
  {
      return mAccessFlags;
  }
  
  GLboolean Buffer::mapped() const
  {
      return mMapped;
  }
  
  GLvoid *Buffer::mapPointer() const
  {
      return mMapPointer;
  }
  
  GLint64 Buffer::mapOffset() const
  {
      return mMapOffset;
  }
  
  GLint64 Buffer::mapLength() const
  {
      return mMapLength;
  }
  
  void Buffer::markTransformFeedbackUsage()
  {
      mBufferStorage->markTransformFeedbackUsage();
      invalidateStaticData();
  }
  
  rx::StaticVertexBufferInterface *Buffer::getStaticVertexBuffer()
  {
      return mStaticVertexBuffer;
  }
  
  rx::StaticIndexBufferInterface *Buffer::getStaticIndexBuffer()
  {
      return mStaticIndexBuffer;
  }
  
  void Buffer::invalidateStaticData()
  {
      if ((mStaticVertexBuffer && mStaticVertexBuffer->getBufferSize() != 0) || (mStaticIndexBuffer && mStaticIndexBuffer->getBufferSize() != 0))
      {
          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;
  }
  
  }