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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
* Copyright (C) 2011 Google Inc. All Rights Reserved.
* Copyright (C) 2020 Metrological Group B.V.
* Copyright (C) 2020 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WorkerAnimationController.h"
#if ENABLE(OFFSCREEN_CANVAS_IN_WORKERS)
#include "Performance.h"
#include "RequestAnimationFrameCallback.h"
#include "WorkerGlobalScope.h"
#include <wtf/Ref.h>
namespace WebCore {
Ref<WorkerAnimationController> WorkerAnimationController::create(WorkerGlobalScope& workerGlobalScope)
{
auto controller = adoptRef(*new WorkerAnimationController(workerGlobalScope));
controller->suspendIfNeeded();
return controller;
}
WorkerAnimationController::WorkerAnimationController(WorkerGlobalScope& workerGlobalScope)
: ActiveDOMObject(&workerGlobalScope)
, m_workerGlobalScope(workerGlobalScope)
, m_animationTimer(*this, &WorkerAnimationController::animationTimerFired)
{
}
WorkerAnimationController::~WorkerAnimationController()
{
ASSERT(!hasPendingActivity());
}
const char* WorkerAnimationController::activeDOMObjectName() const
{
return "WorkerAnimationController";
}
bool WorkerAnimationController::virtualHasPendingActivity() const
{
return m_animationTimer.isActive();
}
void WorkerAnimationController::stop()
{
m_animationTimer.stop();
m_animationCallbacks.clear();
}
void WorkerAnimationController::suspend(ReasonForSuspension)
{
m_savedIsActive = hasPendingActivity();
stop();
}
void WorkerAnimationController::resume()
{
if (m_savedIsActive) {
m_savedIsActive = false;
scheduleAnimation();
}
}
WorkerAnimationController::CallbackId WorkerAnimationController::requestAnimationFrame(Ref<RequestAnimationFrameCallback>&& callback)
{
// FIXME: There's a lot of missing throttling behaviour that's present on DOMDocument
WorkerAnimationController::CallbackId callbackId = ++m_nextAnimationCallbackId;
callback->m_firedOrCancelled = false;
callback->m_id = callbackId;
m_animationCallbacks.append(WTFMove(callback));
scheduleAnimation();
return callbackId;
}
void WorkerAnimationController::cancelAnimationFrame(CallbackId callbackId)
{
for (size_t i = 0; i < m_animationCallbacks.size(); ++i) {
auto& callback = m_animationCallbacks[i];
if (callback->m_id == callbackId) {
callback->m_firedOrCancelled = true;
m_animationCallbacks.remove(i);
return;
}
}
}
void WorkerAnimationController::scheduleAnimation()
{
if (m_animationTimer.isActive())
return;
Seconds animationInterval = RequestAnimationFrameCallback::fullSpeedAnimationInterval;
Seconds scheduleDelay = std::max(animationInterval - Seconds::fromMilliseconds(m_workerGlobalScope.performance().now() - m_lastAnimationFrameTimestamp), 0_s);
m_animationTimer.startOneShot(scheduleDelay);
}
void WorkerAnimationController::animationTimerFired()
{
m_lastAnimationFrameTimestamp = m_workerGlobalScope.performance().now();
serviceRequestAnimationFrameCallbacks(m_lastAnimationFrameTimestamp);
}
void WorkerAnimationController::serviceRequestAnimationFrameCallbacks(DOMHighResTimeStamp timestamp)
{
if (!m_animationCallbacks.size())
return;
// First, generate a list of callbacks to consider. Callbacks registered from this point
// on are considered only for the "next" frame, not this one.
CallbackList callbacks(m_animationCallbacks);
for (auto& callback : callbacks) {
if (callback->m_firedOrCancelled)
continue;
callback->m_firedOrCancelled = true;
callback->handleEvent(timestamp);
}
// Remove any callbacks we fired from the list of pending callbacks.
m_animationCallbacks.removeAllMatching([](auto& callback) {
return callback->m_firedOrCancelled;
});
if (m_animationCallbacks.size())
scheduleAnimation();
}
} // namespace WebCore
#endif
|
