summaryrefslogtreecommitdiff
path: root/src/opengl/qglwindowsurface_qws.cpp
blob: 2da156ee4cbd9789c6ea643f79425481ae4147f1 (plain)
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
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui/QPaintDevice>
#include <QtGui/QWidget>
#include <QtOpenGL/QGLWidget>
#include "private/qglwindowsurface_qws_p.h"
#include "private/qpaintengine_opengl_p.h"

QT_BEGIN_NAMESPACE

/*!
    \class QWSGLWindowSurface
    \since 4.3
    \ingroup qws
    \preliminary

    \brief The QWSGLWindowSurface class provides the drawing area for top-level
    windows with Qt for Embedded Linux on EGL/OpenGL ES. It also provides the
    drawing area for \l{QGLWidget}s whether they are top-level windows or
    children of another QWidget.

    Note that this class is only available in Qt for Embedded Linux and only
    available if Qt is configured with OpenGL support.
*/

class QWSGLWindowSurfacePrivate
{
public:
    QWSGLWindowSurfacePrivate() :
        qglContext(0), ownsContext(false) {}

    QGLContext *qglContext;
    bool ownsContext;
};

/*!
    Constructs an empty QWSGLWindowSurface for the given top-level \a window.
    The window surface is later initialized from chooseContext() and resources for it
    is typically allocated in setGeometry().
*/
QWSGLWindowSurface::QWSGLWindowSurface(QWidget *window)
    : QWSWindowSurface(window),
      d_ptr(new QWSGLWindowSurfacePrivate)
{
}

/*!
    Constructs an empty QWSGLWindowSurface.
*/
QWSGLWindowSurface::QWSGLWindowSurface()
    : d_ptr(new QWSGLWindowSurfacePrivate)
{
}

/*!
    Destroys the QWSGLWindowSurface object and frees any
    allocated resources.
 */
QWSGLWindowSurface::~QWSGLWindowSurface()
{
    Q_D(QWSGLWindowSurface);
    if (d->ownsContext)
        delete d->qglContext;
    delete d;
}

/*!
    Returns the QGLContext of the window surface.
*/
QGLContext *QWSGLWindowSurface::context() const
{
    Q_D(const QWSGLWindowSurface);
    if (!d->qglContext) {
        QWSGLWindowSurface *that = const_cast<QWSGLWindowSurface*>(this);
        that->setContext(new QGLContext(QGLFormat::defaultFormat()));
        that->d_func()->ownsContext = true;
    }
    return d->qglContext;
}

/*!
    Sets the QGLContext for this window surface to \a context.
*/
void QWSGLWindowSurface::setContext(QGLContext *context)
{
    Q_D(QWSGLWindowSurface);
    if (d->ownsContext) {
        delete d->qglContext;
        d->ownsContext = false;
    }
    d->qglContext = context;
}

QT_END_NAMESPACE