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) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcocoabackingstore.h"
#include <QtGui/QPainter>
#include "qcocoahelpers.h"
QT_BEGIN_NAMESPACE
QCocoaBackingStore::QCocoaBackingStore(QWindow *window)
: QPlatformBackingStore(window)
, m_cgImage(0)
{
}
QCocoaBackingStore::~QCocoaBackingStore()
{
CGImageRelease(m_cgImage);
m_cgImage = 0;
}
QPaintDevice *QCocoaBackingStore::paintDevice()
{
QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(window()->handle());
int windowDevicePixelRatio = int(cocoaWindow->devicePixelRatio());
// Receate the backing store buffer if the effective buffer size has changed,
// either due to a window resize or devicePixelRatio change.
QSize effectiveBufferSize = m_requestedSize * windowDevicePixelRatio;
if (m_qImage.size() != effectiveBufferSize) {
CGImageRelease(m_cgImage);
m_cgImage = 0;
QImage::Format format = (window()->format().hasAlpha() || cocoaWindow->m_drawContentBorderGradient)
? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32;
m_qImage = QImage(effectiveBufferSize, format);
m_qImage.setDevicePixelRatio(windowDevicePixelRatio);
if (format == QImage::Format_ARGB32_Premultiplied)
m_qImage.fill(Qt::transparent);
}
return &m_qImage;
}
void QCocoaBackingStore::flush(QWindow *win, const QRegion ®ion, const QPoint &offset)
{
// A flush means that qImage has changed. Since CGImages are seen as
// immutable, CoreImage fails to pick up this change for m_cgImage
// (since it usually cached), so we must recreate it. We await doing this
// until one of the views needs it, since, together with calling
// "setNeedsDisplayInRect" instead of "displayRect" we will, in most
// cases, get away with doing this once for every repaint. Also note that
// m_cgImage is only a reference to the data inside m_qImage, it is not a copy.
CGImageRelease(m_cgImage);
m_cgImage = 0;
if (!m_qImage.isNull()) {
if (QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(win->handle()))
[cocoaWindow->m_qtView flushBackingStore:this region:region offset:offset];
}
}
QImage QCocoaBackingStore::toImage() const
{
return m_qImage;
}
void QCocoaBackingStore::resize(const QSize &size, const QRegion &)
{
m_requestedSize = size;
}
bool QCocoaBackingStore::scroll(const QRegion &area, int dx, int dy)
{
extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
const qreal devicePixelRatio = m_qImage.devicePixelRatio();
QPoint qpoint(dx * devicePixelRatio, dy * devicePixelRatio);
const QVector<QRect> qrects = area.rects();
for (int i = 0; i < qrects.count(); ++i) {
const QRect &qrect = QRect(qrects.at(i).topLeft() * devicePixelRatio, qrects.at(i).size() * devicePixelRatio);
qt_scrollRectInImage(m_qImage, qrect, qpoint);
}
return true;
}
qreal QCocoaBackingStore::getBackingStoreDevicePixelRatio()
{
return m_qImage.devicePixelRatio();
}
QT_END_NAMESPACE
|
