/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QOFFSCREENSURFACE_H
#define QOFFSCREENSURFACE_H

#include <QtCore/QObject>
#include <QtGui/qsurface.h>

QT_BEGIN_NAMESPACE

class QOffscreenSurfacePrivate;

class QScreen;
class QPlatformOffscreenSurface;

class Q_GUI_EXPORT QOffscreenSurface : public QObject, public QSurface
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QOffscreenSurface)

public:

    explicit QOffscreenSurface(QScreen *screen = Q_NULLPTR);
    virtual ~QOffscreenSurface();

    SurfaceType surfaceType() const Q_DECL_OVERRIDE;

    void create();
    void destroy();

    bool isValid() const;

    void setFormat(const QSurfaceFormat &format);
    QSurfaceFormat format() const Q_DECL_OVERRIDE;
    QSurfaceFormat requestedFormat() const;

    QSize size() const Q_DECL_OVERRIDE;

    QScreen *screen() const;
    void setScreen(QScreen *screen);

    QPlatformOffscreenSurface *handle() const;

Q_SIGNALS:
    void screenChanged(QScreen *screen);

private Q_SLOTS:
    void screenDestroyed(QObject *screen);

private:

    QPlatformSurface *surfaceHandle() const Q_DECL_OVERRIDE;

    Q_DISABLE_COPY(QOffscreenSurface)
};

QT_END_NAMESPACE

#endif // QOFFSCREENSURFACE_H