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1 | /**************************************************************************** |
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2 | ** |
3 | ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). |
4 | ** Contact: http://www.qt-project.org/legal |
5 | ** |
6 | ** This file is part of the QtOpenGL module of the Qt Toolkit. |
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8 | ** $QT_BEGIN_LICENSE:LGPL$ |
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25 | ** In addition, as a special exception, Digia gives you certain additional |
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29 | ** GNU General Public License Usage |
30 | ** Alternatively, this file may be used under the terms of the GNU |
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36 | ** |
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38 | ** $QT_END_LICENSE$ |
39 | ** |
40 | ****************************************************************************/ |
41 | |
42 | #include <QtGui/QPaintDevice> |
43 | #include <QtGui/QWidget> |
44 | #include <QtOpenGL/QGLWidget> |
45 | #include "private/qglwindowsurface_qws_p.h" |
46 | #include "private/qpaintengine_opengl_p.h" |
47 | |
48 | QT_BEGIN_NAMESPACE |
49 | |
50 | /*! |
51 | \class QWSGLWindowSurface |
52 | \since 4.3 |
53 | \ingroup qws |
54 | \preliminary |
55 | |
56 | \brief The QWSGLWindowSurface class provides the drawing area for top-level |
57 | windows with Qt for Embedded Linux on EGL/OpenGL ES. It also provides the |
58 | drawing area for \l{QGLWidget}s whether they are top-level windows or |
59 | children of another QWidget. |
60 | |
61 | Note that this class is only available in Qt for Embedded Linux and only |
62 | available if Qt is configured with OpenGL support. |
63 | */ |
64 | |
65 | class QWSGLWindowSurfacePrivate |
66 | { |
67 | public: |
68 | QWSGLWindowSurfacePrivate() : |
69 | qglContext(0), ownsContext(false) {} |
70 | |
71 | QGLContext *qglContext; |
72 | bool ownsContext; |
73 | }; |
74 | |
75 | /*! |
76 | Constructs an empty QWSGLWindowSurface for the given top-level \a window. |
77 | The window surface is later initialized from chooseContext() and resources for it |
78 | is typically allocated in setGeometry(). |
79 | */ |
80 | QWSGLWindowSurface::QWSGLWindowSurface(QWidget *window) |
81 | : QWSWindowSurface(window), |
82 | d_ptr(new QWSGLWindowSurfacePrivate) |
83 | { |
84 | } |
85 | |
86 | /*! |
87 | Constructs an empty QWSGLWindowSurface. |
88 | */ |
89 | QWSGLWindowSurface::QWSGLWindowSurface() |
90 | : d_ptr(new QWSGLWindowSurfacePrivate) |
91 | { |
92 | } |
93 | |
94 | /*! |
95 | Destroys the QWSGLWindowSurface object and frees any |
96 | allocated resources. |
97 | */ |
98 | QWSGLWindowSurface::~QWSGLWindowSurface() |
99 | { |
100 | Q_D(QWSGLWindowSurface); |
101 | if (d->ownsContext) |
102 | delete d->qglContext; |
103 | delete d; |
104 | } |
105 | |
106 | /*! |
107 | Returns the QGLContext of the window surface. |
108 | */ |
109 | QGLContext *QWSGLWindowSurface::context() const |
110 | { |
111 | Q_D(const QWSGLWindowSurface); |
112 | if (!d->qglContext) { |
113 | QWSGLWindowSurface *that = const_cast<QWSGLWindowSurface*>(this); |
114 | that->setContext(new QGLContext(QGLFormat::defaultFormat())); |
115 | that->d_func()->ownsContext = true; |
116 | } |
117 | return d->qglContext; |
118 | } |
119 | |
120 | /*! |
121 | Sets the QGLContext for this window surface to \a context. |
122 | */ |
123 | void QWSGLWindowSurface::setContext(QGLContext *context) |
124 | { |
125 | Q_D(QWSGLWindowSurface); |
126 | if (d->ownsContext) { |
127 | delete d->qglContext; |
128 | d->ownsContext = false; |
129 | } |
130 | d->qglContext = context; |
131 | } |
132 | |
133 | QT_END_NAMESPACE |
134 |
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