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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/browser/renderer_host/begin_frame_observer_proxy.h" | 5 #include "content/browser/renderer_host/begin_frame_observer_proxy.h" |
6 | 6 |
7 namespace content { | 7 namespace content { |
8 | 8 |
9 BeginFrameObserverProxy::BeginFrameObserverProxy( | 9 BeginFrameObserverProxy::BeginFrameObserverProxy( |
10 BeginFrameObserverProxyClient* client) | 10 BeginFrameObserverProxyClient* client) |
11 : needs_begin_frames_(false), | 11 : needs_begin_frames_(false), |
12 client_(client), | 12 client_(client), |
13 compositor_(nullptr) { | 13 compositor_(nullptr) { |
14 } | 14 } |
15 | 15 |
16 BeginFrameObserverProxy::~BeginFrameObserverProxy() { | 16 BeginFrameObserverProxy::~BeginFrameObserverProxy() { |
17 DCHECK(!compositor_); | |
18 } | 17 } |
19 | 18 |
20 void BeginFrameObserverProxy::SetNeedsBeginFrames(bool needs_begin_frames) { | 19 void BeginFrameObserverProxy::SetNeedsBeginFrames(bool needs_begin_frames) { |
21 if (needs_begin_frames_ == needs_begin_frames) | 20 if (needs_begin_frames_ == needs_begin_frames) |
22 return; | 21 return; |
23 | 22 |
24 needs_begin_frames_ = needs_begin_frames; | 23 needs_begin_frames_ = needs_begin_frames; |
25 | 24 |
26 // In some cases, BeginFrame message is requested before |client_|'s window is | 25 // In some cases, BeginFrame message is requested before |client_|'s window is |
27 // added in the root window hierarchy. | 26 // added in the root window hierarchy. |
28 if (!compositor_) | 27 if (!compositor_) |
29 return; | 28 return; |
30 | 29 |
31 if (needs_begin_frames) | 30 if (needs_begin_frames) |
32 StartObservingBeginFrames(); | 31 StartObservingBeginFrames(); |
33 else | 32 else |
34 StopObservingBeginFrames(); | 33 StopObservingBeginFrames(); |
35 } | 34 } |
36 | 35 |
37 void BeginFrameObserverProxy::SetCompositor(ui::Compositor* compositor) { | 36 void BeginFrameObserverProxy::SetCompositor(ui::Compositor* compositor) { |
38 DCHECK(!compositor_); | 37 DCHECK(!compositor_); |
39 DCHECK(compositor); | 38 DCHECK(compositor); |
40 | 39 |
41 compositor_ = compositor; | 40 compositor_ = compositor; |
42 compositor_->AddObserver(this); | |
43 if (needs_begin_frames_) | 41 if (needs_begin_frames_) |
44 StartObservingBeginFrames(); | 42 StartObservingBeginFrames(); |
45 } | 43 } |
46 | 44 |
47 void BeginFrameObserverProxy::ResetCompositor() { | 45 void BeginFrameObserverProxy::ResetCompositor() { |
48 if (!compositor_) | 46 if (!compositor_) |
49 return; | 47 return; |
50 compositor_->RemoveObserver(this); | |
51 | 48 |
52 if (needs_begin_frames_) | 49 if (needs_begin_frames_) |
53 StopObservingBeginFrames(); | 50 StopObservingBeginFrames(); |
54 compositor_ = nullptr; | 51 compositor_ = nullptr; |
55 } | 52 } |
56 | 53 |
57 void BeginFrameObserverProxy::OnSendBeginFrame(const cc::BeginFrameArgs& args) { | 54 void BeginFrameObserverProxy::OnSendBeginFrame(const cc::BeginFrameArgs& args) { |
58 if (last_sent_begin_frame_args_.frame_time != args.frame_time) | 55 if (last_sent_begin_frame_args_.frame_time != args.frame_time) |
59 client_->SendBeginFrame(args); | 56 client_->SendBeginFrame(args); |
60 last_sent_begin_frame_args_ = args; | 57 last_sent_begin_frame_args_ = args; |
61 } | 58 } |
62 | 59 |
63 void BeginFrameObserverProxy::OnCompositingShuttingDown( | |
64 ui::Compositor* compositor) { | |
65 ResetCompositor(); | |
66 } | |
67 | |
68 void BeginFrameObserverProxy::StartObservingBeginFrames() { | 60 void BeginFrameObserverProxy::StartObservingBeginFrames() { |
69 DCHECK(compositor_); | 61 DCHECK(compositor_); |
70 compositor_->AddBeginFrameObserver(this); | 62 compositor_->AddBeginFrameObserver(this); |
71 } | 63 } |
72 | 64 |
73 void BeginFrameObserverProxy::StopObservingBeginFrames() { | 65 void BeginFrameObserverProxy::StopObservingBeginFrames() { |
74 DCHECK(compositor_); | 66 DCHECK(compositor_); |
75 compositor_->RemoveBeginFrameObserver(this); | 67 compositor_->RemoveBeginFrameObserver(this); |
76 } | 68 } |
77 | 69 |
78 } // namespace content | 70 } // namespace content |
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