components/view_manager/gles2/mojo_buffer_backing.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/view_manager/gles2/mojo_buffer_backing.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace gles2 {
  10
  11 MojoBufferBacking::MojoBufferBacking(mojo::ScopedSharedBufferHandle handle,
  12                                      void* memory,
  13                                      size_t size)
  14     : handle_(handle.Pass()), memory_(memory), size_(size) {}
  15
  16 MojoBufferBacking::~MojoBufferBacking() { mojo::UnmapBuffer(memory_); }
  17
  18 // static
  19 scoped_ptr<gpu::BufferBacking> MojoBufferBacking::Create(
  20     mojo::ScopedSharedBufferHandle handle,
  21     size_t size) {
  22   void* memory = NULL;
  23   MojoResult result = mojo::MapBuffer(
  24       handle.get(), 0, size, &memory, MOJO_MAP_BUFFER_FLAG_NONE);
  25   if (result != MOJO_RESULT_OK)
  26     return scoped_ptr<BufferBacking>();
  27   DCHECK(memory);
  28   return scoped_ptr<BufferBacking>(
  29       new MojoBufferBacking(handle.Pass(), memory, size));
  30 }
  31 void* MojoBufferBacking::GetMemory() const { return memory_; }
  32 size_t MojoBufferBacking::GetSize() const { return size_; }
  33
  34 }  // namespace gles2