/****************************************************************************
**
** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** 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
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** 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
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****************************************************************************/

#ifndef QT3DRENDER_SCENE3DRENDERER_P_H
#define QT3DRENDER_SCENE3DRENDERER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/QObject>
#include <QtCore/qsize.h>
#include <QtCore/QMutex>

QT_BEGIN_NAMESPACE

class QQuickWindow;
class QSGTexture;
class QOpenGLFramebufferObject;

namespace Qt3DCore {
class QAspectEngine;
}

namespace Qt3DRender {

class QRenderAspect;
class Scene3DCleaner;
class Scene3DItem;
class Scene3DSGNode;

class Scene3DRenderer : public QObject
{
    Q_OBJECT
public:
    Scene3DRenderer();
    ~Scene3DRenderer();

    QOpenGLFramebufferObject *createMultisampledFramebufferObject(const QSize &size);
    QOpenGLFramebufferObject *createFramebufferObject(const QSize &size);
    void scheduleRootEntityChange();
    void setSGNode(Scene3DSGNode *node);
    void setCleanerHelper(Scene3DCleaner *cleaner);
    void synchronize();
    void init(Scene3DItem *item, Qt3DCore::QAspectEngine *aspectEngine, QRenderAspect *renderAspect);

    QRenderAspect *renderAspect() const
    {
        return m_renderAspect;
    }
public Q_SLOTS:
    void render();
    void shutdown();
    void onSceneGraphInvalidated();
    void onWindowChanged(QQuickWindow *w);

private:
    Scene3DItem *m_item; // Will be released by the QQuickWindow/QML Engine
    Qt3DCore::QAspectEngine *m_aspectEngine; // Will be released by the Scene3DItem
    QRenderAspect *m_renderAspect; // Will be released by the aspectEngine
    QScopedPointer<QOpenGLFramebufferObject> m_multisampledFBO;
    QScopedPointer<QOpenGLFramebufferObject> m_finalFBO;
    QScopedPointer<QSGTexture> m_texture;
    Scene3DSGNode *m_node; // Will be released by the QtQuick SceneGraph
    QQuickWindow *m_window;
    QMutex m_windowMutex;
    QSize m_lastSize;
    bool m_multisample;
    bool m_lastMultisample;
    bool m_needsShutdown;
    bool m_blocking;
    bool m_forceRecreate;
    bool m_resetRequested = false;

    friend class Scene3DItem;
};

} // namespace Qt3DRender

QT_END_NAMESPACE

#endif // QT3DRENDER_SCENE3DRENDERER_P_H
