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/****************************************************************************
**
** Copyright (C) 2016 Canonical, Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/


#ifndef QMIRCLIENTBACKINGSTORE_H
#define QMIRCLIENTBACKINGSTORE_H

#include <qpa/qplatformbackingstore.h>

class QOpenGLContext;
class QOpenGLTexture;
class QOpenGLTextureBlitter;

class QMirClientBackingStore : public QPlatformBackingStore
{
public:
    QMirClientBackingStore(QWindow* window);
    virtual ~QMirClientBackingStore();

    // QPlatformBackingStore methods.
    void beginPaint(const QRegion&) override;
    void flush(QWindow* window, const QRegion& region, const QPoint& offset) override;
    void resize(const QSize& size, const QRegion& staticContents) override;
    QPaintDevice* paintDevice() override;
    QImage toImage() const override;

protected:
    void updateTexture();

private:
    QScopedPointer<QOpenGLContext> mContext;
    QScopedPointer<QOpenGLTexture> mTexture;
    QScopedPointer<QOpenGLTextureBlitter> mBlitter;
    QImage mImage;
    QRegion mDirty;
};

#endif // QMIRCLIENTBACKINGSTORE_H