/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtOpenGL module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtGui/QPaintDevice>+
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#include <QtGui/QWidget>+
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#include <QtOpenGL/QGLWidget>+
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#include "private/qglwindowsurface_qws_p.h"+
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#include "private/qpaintengine_opengl_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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/*!+
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    \class QWSGLWindowSurface+
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    \since 4.3+
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    \ingroup qws+
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    \preliminary+
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+
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    \brief The QWSGLWindowSurface class provides the drawing area for top-level+
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    windows with Qt for Embedded Linux on EGL/OpenGL ES. It also provides the+
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    drawing area for \l{QGLWidget}s whether they are top-level windows or+
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    children of another QWidget.+
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+
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    Note that this class is only available in Qt for Embedded Linux and only+
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    available if Qt is configured with OpenGL support.+
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*/+
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+
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class QWSGLWindowSurfacePrivate+
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{+
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public:+
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    QWSGLWindowSurfacePrivate() :+
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        qglContext(0), ownsContext(false) {}+
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+
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    QGLContext *qglContext;+
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    bool ownsContext;+
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};+
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+
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/*!+
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    Constructs an empty QWSGLWindowSurface for the given top-level \a window.+
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    The window surface is later initialized from chooseContext() and resources for it+
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    is typically allocated in setGeometry().+
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*/+
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QWSGLWindowSurface::QWSGLWindowSurface(QWidget *window)+
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    : QWSWindowSurface(window),+
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      d_ptr(new QWSGLWindowSurfacePrivate)+
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{+
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}+
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+
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/*!+
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    Constructs an empty QWSGLWindowSurface.+
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*/+
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QWSGLWindowSurface::QWSGLWindowSurface()+
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    : d_ptr(new QWSGLWindowSurfacePrivate)+
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{+
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}+
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+
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/*!+
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    Destroys the QWSGLWindowSurface object and frees any+
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    allocated resources.+
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 */+
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QWSGLWindowSurface::~QWSGLWindowSurface()+
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{+
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    Q_D(QWSGLWindowSurface);+
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    if (d->ownsContext)+
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        delete d->qglContext;+
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    delete d;+
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}+
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+
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/*!+
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    Returns the QGLContext of the window surface.+
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*/+
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QGLContext *QWSGLWindowSurface::context() const+
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{+
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    Q_D(const QWSGLWindowSurface);+
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    if (!d->qglContext) {+
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        QWSGLWindowSurface *that = const_cast<QWSGLWindowSurface*>(this);+
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        that->setContext(new QGLContext(QGLFormat::defaultFormat()));+
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        that->d_func()->ownsContext = true;+
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    }+
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    return d->qglContext;+
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}+
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+
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/*!+
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    Sets the QGLContext for this window surface to \a context.+
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*/+
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void QWSGLWindowSurface::setContext(QGLContext *context)+
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{+
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    Q_D(QWSGLWindowSurface);+
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    if (d->ownsContext) {+
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        delete d->qglContext;+
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        d->ownsContext = false;+
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    }+
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    d->qglContext = context;+
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}+
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+
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QT_END_NAMESPACE+
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