components/mus/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/mus/gles2/mojo_buffer_backing.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace mus {
  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() {
  17   mojo::UnmapBuffer(memory_);
  18 }
  19
  20 // static
  21 scoped_ptr<gpu::BufferBacking> MojoBufferBacking::Create(
  22     mojo::ScopedSharedBufferHandle handle,
  23     size_t size) {
  24   void* memory = NULL;
  25   MojoResult result = mojo::MapBuffer(handle.get(), 0, size, &memory,
  26                                       MOJO_MAP_BUFFER_FLAG_NONE);
  27   if (result != MOJO_RESULT_OK)
  28     return scoped_ptr<BufferBacking>();
  29   DCHECK(memory);
  30   return scoped_ptr<BufferBacking>(
  31       new MojoBufferBacking(handle.Pass(), memory, size));
  32 }
  33 void* MojoBufferBacking::GetMemory() const {
  34   return memory_;
  35 }
  36 size_t MojoBufferBacking::GetSize() const {
  37   return size_;
  38 }
  39
  40 }  // namespace mus