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1 // Copyright 2016 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 "base/lazy_instance.h" | |
6 #include "content/browser/renderer_host/offscreen_canvas_surface_manager.h" | |
7 | |
8 namespace content { | |
9 | |
10 namespace { | |
11 base::LazyInstance<OffscreenCanvasSurfaceManager> g_manager = | |
dcheng
2016/11/15 07:28:29
Nit: let's make this a Leaky LazyInstance unless w
xlai (Olivia)
2016/11/15 17:16:18
Done.
| |
12 LAZY_INSTANCE_INITIALIZER; | |
13 } | |
14 | |
15 OffscreenCanvasSurfaceManager::OffscreenCanvasSurfaceManager() {} | |
16 | |
17 OffscreenCanvasSurfaceManager::~OffscreenCanvasSurfaceManager() { | |
18 registered_surface_instances_.clear(); | |
19 } | |
20 | |
21 OffscreenCanvasSurfaceManager* OffscreenCanvasSurfaceManager::GetInstance() { | |
22 return g_manager.Pointer(); | |
23 } | |
24 | |
25 void OffscreenCanvasSurfaceManager::RegisterOffscreenCanvasSurfaceInstance( | |
26 cc::FrameSinkId frame_sink_id, | |
27 OffscreenCanvasSurfaceImpl* surface_instance) { | |
28 DCHECK(surface_instance); | |
29 DCHECK_EQ(registered_surface_instances_.count(frame_sink_id), 0u); | |
30 registered_surface_instances_[frame_sink_id] = surface_instance->GetWeakPtr(); | |
31 } | |
32 | |
33 void OffscreenCanvasSurfaceManager::UnregisterOffscreenCanvasSurfaceInstance( | |
34 cc::FrameSinkId frame_sink_id) { | |
35 DCHECK_EQ(registered_surface_instances_.count(frame_sink_id), 1u); | |
36 registered_surface_instances_.erase(frame_sink_id); | |
37 } | |
38 | |
39 OffscreenCanvasSurfaceImpl* OffscreenCanvasSurfaceManager::GetSurfaceInstance( | |
40 cc::FrameSinkId frame_sink_id) { | |
41 auto search = registered_surface_instances_.find(frame_sink_id); | |
42 if (search != registered_surface_instances_.end()) { | |
43 return search->second.get(); | |
44 } | |
45 return nullptr; | |
46 } | |
47 | |
48 } // namespace content | |
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