/****************************************************************************
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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****************************************************************************/

#ifndef QSGWINDOWSRENDERLOOP_P_H
#define QSGWINDOWSRENDERLOOP_P_H

#include <QtCore/QObject>
#include <QtCore/QElapsedTimer>

#include <QtGui/QOpenGLContext>

#include "qsgrenderloop_p.h"

QT_BEGIN_NAMESPACE

class QSGWindowsRenderLoop : public QSGRenderLoop
{
    Q_OBJECT
public:
    explicit QSGWindowsRenderLoop();

    void show(QQuickWindow *window);
    void hide(QQuickWindow *window);

    void windowDestroyed(QQuickWindow *window);

    void exposureChanged(QQuickWindow *window);
    QImage grab(QQuickWindow *window);

    void update(QQuickWindow *window);
    void maybeUpdate(QQuickWindow *window);

    QAnimationDriver *animationDriver() const { return m_animationDriver; }

    QSGContext *sceneGraphContext() const { return m_sg; }

    void releaseResources(QQuickWindow *) { }

    void render();
    void renderWindow(QQuickWindow *window);

    void resize(QQuickWindow *, const QSize &) { }

    bool event(QEvent *event);
    bool anyoneShowing() const;

    bool interleaveIncubation() const;

public slots:
    void started();
    void stopped();

private:
    struct WindowData {
        QQuickWindow *window;
        bool pendingUpdate;
    };

    void handleObscurity();
    void maybePostUpdateTimer();
    WindowData *windowData(QQuickWindow *window);

    QList<WindowData> m_windows;

    QOpenGLContext *m_gl;
    QSGContext *m_sg;

    QAnimationDriver *m_animationDriver;

    int m_updateTimer;
    int m_animationTimer;

    int m_vsyncDelta;
};

QT_END_NAMESPACE

#endif // QSGWINDOWSRENDERLOOP_P_H
