cc/test/test_shared_bitmap_manager.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 "cc/test/test_shared_bitmap_manager.h"
   6
   7 #include "base/memory/shared_memory.h"
   8
   9 namespace cc {
  10
  11 namespace {
  12 class OwnedSharedBitmap : public SharedBitmap {
  13  public:
  14   OwnedSharedBitmap(scoped_ptr<base::SharedMemory> shared_memory,
  15                     const SharedBitmapId& id)
  16       : SharedBitmap(static_cast<uint8*>(shared_memory->memory()), id),
  17         shared_memory_(shared_memory.Pass()) {}
  18
  19   ~OwnedSharedBitmap() override {}
  20
  21  private:
  22   scoped_ptr<base::SharedMemory> shared_memory_;
  23 };
  24
  25 }  // namespace
  26
  27 TestSharedBitmapManager::TestSharedBitmapManager() {}
  28
  29 TestSharedBitmapManager::~TestSharedBitmapManager() {}
  30
  31 scoped_ptr<SharedBitmap> TestSharedBitmapManager::AllocateSharedBitmap(
  32     const gfx::Size& size) {
  33   base::AutoLock lock(lock_);
  34   scoped_ptr<base::SharedMemory> memory(new base::SharedMemory);
  35   memory->CreateAndMapAnonymous(size.GetArea() * 4);
  36   SharedBitmapId id = SharedBitmap::GenerateId();
  37   bitmap_map_[id] = memory.get();
  38   return make_scoped_ptr(new OwnedSharedBitmap(memory.Pass(), id));
  39 }
  40
  41 scoped_ptr<SharedBitmap> TestSharedBitmapManager::GetSharedBitmapFromId(
  42     const gfx::Size&,
  43     const SharedBitmapId& id) {
  44   base::AutoLock lock(lock_);
  45   if (bitmap_map_.find(id) == bitmap_map_.end())
  46     return nullptr;
  47   uint8* pixels = static_cast<uint8*>(bitmap_map_[id]->memory());
  48   return make_scoped_ptr(new SharedBitmap(pixels, id));
  49 }
  50
  51 }  // namespace cc