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1 // Copyright 2017 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/surfaces/primary_begin_frame_source.h" | |
6 | |
7 namespace cc { | |
8 | |
9 PrimaryBeginFrameSource::PrimaryBeginFrameSource() | |
10 : begin_frame_source_(this) {} | |
11 | |
12 PrimaryBeginFrameSource::~PrimaryBeginFrameSource() = default; | |
13 | |
14 void PrimaryBeginFrameSource::OnBeginFrameSourceAdded( | |
15 BeginFrameSource* begin_frame_source) { | |
16 sources_.insert(begin_frame_source); | |
17 | |
18 if (current_begin_frame_source_) | |
19 return; | |
20 | |
21 current_begin_frame_source_ = begin_frame_source; | |
22 if (needs_begin_frames_ && current_begin_frame_source_) | |
23 current_begin_frame_source_->AddObserver(this); | |
24 } | |
25 | |
26 void PrimaryBeginFrameSource::OnBeginFrameSourceRemoved( | |
27 BeginFrameSource* begin_frame_source) { | |
28 sources_.erase(begin_frame_source); | |
29 if (current_begin_frame_source_ != begin_frame_source) | |
30 return; | |
31 | |
32 if (needs_begin_frames_) | |
33 current_begin_frame_source_->RemoveObserver(this); | |
34 | |
35 if (!sources_.empty()) | |
36 current_begin_frame_source_ = *sources_.begin(); | |
37 else | |
38 current_begin_frame_source_ = nullptr; | |
39 | |
40 if (needs_begin_frames_ && current_begin_frame_source_) | |
41 current_begin_frame_source_->AddObserver(this); | |
42 } | |
43 | |
44 void PrimaryBeginFrameSource::OnBeginFrame(const BeginFrameArgs& args) { | |
45 begin_frame_source_.OnBeginFrame(args); | |
46 last_begin_frame_args_ = args; | |
47 } | |
48 | |
49 const BeginFrameArgs& PrimaryBeginFrameSource::LastUsedBeginFrameArgs() const { | |
50 return last_begin_frame_args_; | |
51 } | |
52 | |
53 void PrimaryBeginFrameSource::OnBeginFrameSourcePausedChanged(bool paused) {} | |
54 | |
55 void PrimaryBeginFrameSource::DidFinishFrame(BeginFrameObserver* obs, | |
56 const BeginFrameAck& ack) { | |
57 begin_frame_source_.DidFinishFrame(obs, ack); | |
58 } | |
59 | |
60 void PrimaryBeginFrameSource::AddObserver(BeginFrameObserver* obs) { | |
61 begin_frame_source_.AddObserver(obs); | |
62 } | |
63 | |
64 void PrimaryBeginFrameSource::RemoveObserver(BeginFrameObserver* obs) { | |
65 begin_frame_source_.RemoveObserver(obs); | |
66 } | |
67 | |
68 bool PrimaryBeginFrameSource::IsThrottled() const { | |
69 return begin_frame_source_.IsThrottled(); | |
70 } | |
71 | |
72 void PrimaryBeginFrameSource::OnNeedsBeginFrames(bool needs_begin_frames) { | |
73 if (needs_begin_frames_ == needs_begin_frames) | |
74 return; | |
75 | |
76 needs_begin_frames_ = needs_begin_frames; | |
77 | |
78 if (!current_begin_frame_source_) | |
79 return; | |
80 | |
81 if (needs_begin_frames_) | |
82 current_begin_frame_source_->AddObserver(this); | |
83 else | |
84 current_begin_frame_source_->RemoveObserver(this); | |
85 } | |
86 | |
87 } // namespace cc | |
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