1 /****************************************************************************
3 ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/legal
6 ** This file is part of the plugins of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Digia. For licensing terms and
14 ** conditions see http://qt.digia.com/licensing. For further information
15 ** use the contact form at http://qt.digia.com/contact-us.
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 2.1 as published by the Free Software
20 ** Foundation and appearing in the file LICENSE.LGPL included in the
21 ** packaging of this file. Please review the following information to
22 ** ensure the GNU Lesser General Public License version 2.1 requirements
23 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
25 ** In addition, as a special exception, Digia gives you certain additional
26 ** rights. These rights are described in the Digia Qt LGPL Exception
27 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
29 ** GNU General Public License Usage
30 ** Alternatively, this file may be used under the terms of the GNU
31 ** General Public License version 3.0 as published by the Free Software
32 ** Foundation and appearing in the file LICENSE.GPL included in the
33 ** packaging of this file. Please review the following information to
34 ** ensure the GNU General Public License version 3.0 requirements will be
35 ** met: http://www.gnu.org/copyleft/gpl.html.
40 ****************************************************************************/
42 #include "qcocoabackingstore.h"
43 #include <QtGui/QPainter>
44 #include "qcocoahelpers.h"
48 QCocoaBackingStore::QCocoaBackingStore(QWindow *window)
49 : QPlatformBackingStore(window)
54 QCocoaBackingStore::~QCocoaBackingStore()
56 CGImageRelease(m_cgImage);
60 QPaintDevice *QCocoaBackingStore::paintDevice()
62 if (m_qImage.size() / m_qImage.devicePixelRatio() != m_requestedSize) {
63 CGImageRelease(m_cgImage);
67 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
68 if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_7) {
69 QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(window()->handle());
70 if (cocoaWindow && cocoaWindow->m_contentView) {
71 scaleFactor = int([[cocoaWindow->m_contentView window] backingScaleFactor]);
76 m_qImage = QImage(m_requestedSize * scaleFactor, QImage::Format_ARGB32_Premultiplied);
77 m_qImage.setDevicePixelRatio(scaleFactor);
82 void QCocoaBackingStore::flush(QWindow *win, const QRegion ®ion, const QPoint &offset)
84 // A flush means that qImage has changed. Since CGImages are seen as
85 // immutable, CoreImage fails to pick up this change for m_cgImage
86 // (since it usually cached), so we must recreate it. We await doing this
87 // until one of the views needs it, since, together with calling
88 // "setNeedsDisplayInRect" instead of "displayRect" we will, in most
89 // cases, get away with doing this once for every repaint. Also note that
90 // m_cgImage is only a reference to the data inside m_qImage, it is not a copy.
91 CGImageRelease(m_cgImage);
93 if (QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(win->handle()))
94 [cocoaWindow->m_contentView flushBackingStore:this region:region offset:offset];
97 void QCocoaBackingStore::resize(const QSize &size, const QRegion &)
99 m_requestedSize = size;
102 bool QCocoaBackingStore::scroll(const QRegion &area, int dx, int dy)
104 extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
105 const qreal devicePixelRatio = m_qImage.devicePixelRatio();
106 QPoint qpoint(dx * devicePixelRatio, dy * devicePixelRatio);
107 const QVector<QRect> qrects = area.rects();
108 for (int i = 0; i < qrects.count(); ++i) {
109 const QRect &qrect = QRect(qrects.at(i).topLeft() * devicePixelRatio, qrects.at(i).size() * devicePixelRatio);
110 qt_scrollRectInImage(m_qImage, qrect, qpoint);
115 CGImageRef QCocoaBackingStore::getBackingStoreCGImage()
118 m_cgImage = qt_mac_toCGImage(m_qImage, false, 0);
120 // Warning: do not retain/release/cache the returned image from
121 // outside the backingstore since it shares data with a QImage and
122 // needs special memory considerations.
126 qreal QCocoaBackingStore::getBackingStoreDevicePixelRatio()
128 return m_qImage.devicePixelRatio();