/****************************************************************************
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** Copyright (C) 2013 Research In Motion
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** This file is part of the Qt Toolkit.
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** General Public License version 3.0 as published by the Free Software
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****************************************************************************/
#ifndef WINDOWGRABBER_H
#define WINDOWGRABBER_H

#include <QAbstractNativeEventFilter>
#include <QObject>
#include <QTimer>

#include <screen/screen.h>

QT_BEGIN_NAMESPACE

class WindowGrabber : public QObject, public QAbstractNativeEventFilter
{
    Q_OBJECT

public:
    explicit WindowGrabber(QObject *parent = 0);
    ~WindowGrabber();

    void setFrameRate(int frameRate);

    void setWindowId(const QByteArray &windowId);

    void start();
    void stop();

    void pause();
    void resume();

    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE;

    QByteArray windowGroupId() const;

signals:
    void frameGrabbed(const QImage &frame);

private slots:
    void grab();

private:
    void cleanup();

    QTimer m_timer;

    QByteArray m_windowId;

    screen_window_t m_window;
    screen_context_t m_screenContext;
    screen_pixmap_t m_screenPixmap;
    screen_buffer_t m_screenPixmapBuffer;

    char* m_screenBuffer;

    int m_screenBufferWidth;
    int m_screenBufferHeight;
    int m_screenBufferStride;

    bool m_active : 1;
    bool m_screenContextInitialized : 1;
    bool m_screenPixmapInitialized : 1;
    bool m_screenPixmapBufferInitialized : 1;
};

QT_END_NAMESPACE

#endif
