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 "ui/gl/gl_image_shared_memory.h"
6
7#include "base/logging.h"
8#include "base/process/process_handle.h"
9
10namespace gfx {
11
12GLImageSharedMemory::GLImageSharedMemory(const gfx::Size& size,
13                                         unsigned internalformat)
14    : GLImageMemory(size, internalformat) {
15}
16
17GLImageSharedMemory::~GLImageSharedMemory() {
18  DCHECK(!shared_memory_);
19}
20
21bool GLImageSharedMemory::Initialize(const gfx::GpuMemoryBufferHandle& handle) {
22  if (!HasValidFormat())
23    return false;
24
25  if (!base::SharedMemory::IsHandleValid(handle.handle))
26    return false;
27
28  base::SharedMemory shared_memory(handle.handle, true);
29
30  // Duplicate the handle.
31  base::SharedMemoryHandle duped_shared_memory_handle;
32  if (!shared_memory.ShareToProcess(base::GetCurrentProcessHandle(),
33                                    &duped_shared_memory_handle)) {
34    DVLOG(0) << "Failed to duplicate shared memory handle.";
35    return false;
36  }
37
38  scoped_ptr<base::SharedMemory> duped_shared_memory(
39      new base::SharedMemory(duped_shared_memory_handle, true));
40
41  if (!duped_shared_memory->Map(Bytes())) {
42    DVLOG(0) << "Failed to map shared memory.";
43    return false;
44  }
45
46  DCHECK(!shared_memory_);
47  shared_memory_ = duped_shared_memory.Pass();
48  GLImageMemory::Initialize(
49      static_cast<unsigned char*>(shared_memory_->memory()));
50  return true;
51}
52
53void GLImageSharedMemory::Destroy(bool have_context) {
54  GLImageMemory::Destroy(have_context);
55  shared_memory_.reset();
56}
57
58}  // namespace gfx
59