blob: 14834785020246ae3bc68a031375875a400496e1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/scheduler/vsync_time_source.h"
namespace cc {
scoped_refptr<VSyncTimeSource> VSyncTimeSource::Create(
VSyncProvider* vsync_provider) {
return make_scoped_refptr(new VSyncTimeSource(vsync_provider));
}
VSyncTimeSource::VSyncTimeSource(VSyncProvider* vsync_provider)
: vsync_provider_(vsync_provider)
, client_(NULL)
, active_(false)
, notification_requested_(false) {}
VSyncTimeSource::~VSyncTimeSource() {}
void VSyncTimeSource::SetClient(TimeSourceClient* client) {
client_ = client;
}
void VSyncTimeSource::SetActive(bool active) {
if (active_ == active)
return;
active_ = active;
// The notification will be lazily disabled in the callback to ensure
// we get notified of the frame immediately following a quick on-off-on
// transition.
if (active_ && !notification_requested_) {
notification_requested_ = true;
vsync_provider_->RequestVSyncNotification(this);
}
}
bool VSyncTimeSource::Active() const {
return active_;
}
base::TimeTicks VSyncTimeSource::LastTickTime() {
return last_tick_time_;
}
base::TimeTicks VSyncTimeSource::NextTickTime() {
return Active() ? last_tick_time_ + interval_ : base::TimeTicks();
}
void VSyncTimeSource::SetTimebaseAndInterval(base::TimeTicks,
base::TimeDelta interval) {
interval_ = interval;
}
void VSyncTimeSource::DidVSync(base::TimeTicks frame_time) {
last_tick_time_ = frame_time;
if (!active_) {
if (notification_requested_) {
notification_requested_ = false;
vsync_provider_->RequestVSyncNotification(NULL);
}
return;
}
if (client_)
client_->OnTimerTick();
}
} // namespace cc
|
