forked from WebKit/WebKit
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathDisplayLinkMac.cpp
More file actions
119 lines (101 loc) · 4.25 KB
/
DisplayLinkMac.cpp
File metadata and controls
119 lines (101 loc) · 4.25 KB
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
/*
* Copyright (C) 2018-2022 Apple Inc. All rights reserved.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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 "DisplayLink.h"
#if HAVE(DISPLAY_LINK)
#include "Logging.h"
#include <wtf/ProcessPrivilege.h>
#include <wtf/text/TextStream.h>
namespace WebKit {
using namespace WebCore;
void DisplayLink::platformInitialize()
{
// FIXME: We can get here with displayID == 0 (webkit.org/b/212120), in which case CVDisplayLinkCreateWithCGDisplay()
// probably defaults to the main screen.
ASSERT(hasProcessPrivilege(ProcessPrivilege::CanCommunicateWithWindowServer));
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CVReturn error = CVDisplayLinkCreateWithCGDisplay(m_displayID, &m_displayLink);
ALLOW_DEPRECATED_DECLARATIONS_END
if (error) {
RELEASE_LOG_FAULT(DisplayLink, "Could not create a display link for display %u: error %d", m_displayID, error);
return;
}
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
error = CVDisplayLinkSetOutputCallback(m_displayLink, displayLinkCallback, this);
ALLOW_DEPRECATED_DECLARATIONS_END
if (error) {
RELEASE_LOG_FAULT(DisplayLink, "DisplayLink: Could not set the display link output callback for display %u: error %d", m_displayID, error);
return;
}
m_displayNominalFramesPerSecond = nominalFramesPerSecondFromDisplayLink(m_displayLink);
}
void DisplayLink::platformFinalize()
{
ASSERT(hasProcessPrivilege(ProcessPrivilege::CanCommunicateWithWindowServer));
ASSERT(m_displayLink);
if (!m_displayLink)
return;
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CVDisplayLinkStop(m_displayLink);
CVDisplayLinkRelease(m_displayLink);
ALLOW_DEPRECATED_DECLARATIONS_END
}
FramesPerSecond DisplayLink::nominalFramesPerSecondFromDisplayLink(CVDisplayLinkRef displayLink)
{
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CVTime refreshPeriod = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(displayLink);
ALLOW_DEPRECATED_DECLARATIONS_END
if (!refreshPeriod.timeValue)
return FullSpeedFramesPerSecond;
FramesPerSecond result = round((double)refreshPeriod.timeScale / (double)refreshPeriod.timeValue);
return result ?: FullSpeedFramesPerSecond;
}
bool DisplayLink::platformIsRunning() const
{
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
return CVDisplayLinkIsRunning(m_displayLink);
ALLOW_DEPRECATED_DECLARATIONS_END
}
void DisplayLink::platformStart()
{
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CVReturn error = CVDisplayLinkStart(m_displayLink);
ALLOW_DEPRECATED_DECLARATIONS_END
if (error)
RELEASE_LOG_FAULT(DisplayLink, "DisplayLink: Could not start the display link: %d", error);
}
void DisplayLink::platformStop()
{
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CVDisplayLinkStop(m_displayLink);
ALLOW_DEPRECATED_DECLARATIONS_END
}
CVReturn DisplayLink::displayLinkCallback(CVDisplayLinkRef displayLinkRef, const CVTimeStamp*, const CVTimeStamp*, CVOptionFlags, CVOptionFlags*, void* data)
{
static_cast<DisplayLink*>(data)->notifyObserversDisplayDidRefresh();
return kCVReturnSuccess;
}
} // namespace WebKit
#endif // HAVE(DISPLAY_LINK)