/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 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.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 later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QT3D_RENDER_PLATFORMSURFACEFILTER_H
#define QT3D_RENDER_PLATFORMSURFACEFILTER_H

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

QT_BEGIN_NAMESPACE

class QOffscreenSurface;
class QWindow;

namespace Qt3D {
namespace Render {

class Renderer;

class PlatformSurfaceFilter : public QObject
{
    Q_OBJECT

public:
    explicit PlatformSurfaceFilter(Renderer *renderAspect,
                                   QObject *parent = 0);
    ~PlatformSurfaceFilter();

    void setWindow(QWindow *window);
    void setOffscreenSurface(QOffscreenSurface *offscreen);

    bool eventFilter(QObject *obj, QEvent *e) Q_DECL_OVERRIDE;

private:
    void setRendererSurface(QSurface *surface);

    template<class T>
    void setSurface(T *surface)
    {
        if (m_obj == surface)
            return;

        if (m_obj)
            m_obj->removeEventFilter(this);

        m_surface = surface;
        m_obj = surface;

        if (m_obj)
            m_obj->installEventFilter(this);
    }

    QObject *m_obj;
    QSurface *m_surface;
    Renderer *m_renderer;
};

} // namespace Render
} // namespace Qt3D

QT_END_NAMESPACE

#endif // QT3D_RENDER_PLATFORMSURFACEFILTER_H
