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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the plugins 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 QXCBBACKINGSTORE_H
#define QXCBBACKINGSTORE_H

#include <qpa/qplatformbackingstore.h>

#include <xcb/xcb.h>

#include "qxcbobject.h"

QT_BEGIN_NAMESPACE

class QXcbShmImage;

class QXcbBackingStore : public QXcbObject, public QPlatformBackingStore
{
public:
    QXcbBackingStore(QWindow *widget);
    ~QXcbBackingStore();

    QPaintDevice *paintDevice() Q_DECL_OVERRIDE;
    void flush(QWindow *window, const QRegion &region, const QPoint &offset) Q_DECL_OVERRIDE;
#ifndef QT_NO_OPENGL
    void composeAndFlush(QWindow *window, const QRegion &region, const QPoint &offset,
                         QPlatformTextureList *textures, QOpenGLContext *context,
                         bool translucentBackground) Q_DECL_OVERRIDE;
    QImage toImage() const Q_DECL_OVERRIDE;
#endif

    QPlatformGraphicsBuffer *graphicsBuffer() const Q_DECL_OVERRIDE;

    void resize(const QSize &size, const QRegion &staticContents) Q_DECL_OVERRIDE;
    bool scroll(const QRegion &area, int dx, int dy) Q_DECL_OVERRIDE;

    void beginPaint(const QRegion &) Q_DECL_OVERRIDE;
    void endPaint() Q_DECL_OVERRIDE;

private:
    QXcbShmImage *m_image;
    QRegion m_paintRegion;
    QImage m_rgbImage;
};

QT_END_NAMESPACE

#endif