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
|
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
** 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 "qiosbackingstore.h"
#include "qioswindow.h"
#include <QtGui/QOpenGLContext>
#include <QtGui/QOpenGLPaintDevice>
#include <QtDebug>
QIOSBackingStore::QIOSBackingStore(QWindow *window)
: QPlatformBackingStore(window)
, m_context(new QOpenGLContext)
, m_device(0)
{
QSurfaceFormat fmt = window->requestedFormat();
fmt.setDepthBufferSize(16);
fmt.setStencilBufferSize(8);
// Needed to prevent QOpenGLContext::makeCurrent() from failing
window->setSurfaceType(QSurface::OpenGLSurface);
m_context->setFormat(fmt);
m_context->setScreen(window->screen());
m_context->create();
}
QIOSBackingStore::~QIOSBackingStore()
{
delete m_context;
delete m_device;
}
void QIOSBackingStore::beginPaint(const QRegion &)
{
m_context->makeCurrent(window());
}
QPaintDevice *QIOSBackingStore::paintDevice()
{
if (!m_device)
m_device = new QOpenGLPaintDevice;
// Keep paint device size and device pixel ratio in sync with window
qreal devicePixelRatio = window()->devicePixelRatio();
m_device->setSize(window()->size() * devicePixelRatio);
m_device->setDevicePixelRatio(devicePixelRatio);
return m_device;
}
void QIOSBackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset)
{
Q_UNUSED(region);
Q_UNUSED(offset);
if (window != this->window()) {
// We skip flushing raster-based child windows, to avoid the extra cost of copying from the
// parent FBO into the child FBO. Since the child is already drawn inside the parent FBO, it
// will become visible when flushing the parent. The only case we end up not supporting is if
// the child window overlaps a sibling window that's draws using a separate QOpenGLContext.
return;
}
m_context->makeCurrent(window);
m_context->swapBuffers(window);
}
void QIOSBackingStore::resize(const QSize &size, const QRegion &staticContents)
{
Q_UNUSED(staticContents);
// Resizing the backing store would in our case mean resizing the QWindow,
// as we cheat and use an QOpenGLPaintDevice that we target at the window.
// That's probably not what the user intended, so we ignore resizes of the
// backing store and always keep the paint device's size in sync with the
// window size in beginPaint().
if (size != window()->size() && !window()->inherits("QWidgetWindow"))
qWarning() << "QIOSBackingStore needs to have the same size as its window";
}
QT_END_NAMESPACE
|