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#ifndef WINDOWGRABBER_H
#define WINDOWGRABBER_H

#define EGL_EGLEXT_PROTOTYPES = 1
#define GL_GLEXT_PROTOTYPES = 1
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/eglext.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 createEglImages();

    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;

    bool handleScreenEvent(screen_event_t event);

    QByteArray windowGroupId() const;

    bool eglImageSupported();
    void checkForEglImageExtension();
    bool eglImagesInitialized();

signals:
    void frameGrabbed(const QImage &frame, int);

private slots:
    void grab();

private:
    void cleanup();
    void updateFrameSize();

    QTimer m_timer;

    QByteArray m_windowId;

    screen_window_t m_window;
    screen_context_t m_screenContext;
    screen_pixmap_t m_screenPixmaps[2];
    screen_buffer_t m_screenPixmapBuffers[2];

    char *m_screenBuffers[2];

    int m_screenBufferWidth;
    int m_screenBufferHeight;
    int m_screenBufferStride;

    bool m_active : 1;
    bool m_screenContextInitialized : 1;
    bool m_screenPixmapBuffersInitialized : 1;
    int m_currentFrame;
    EGLImageKHR img[2];
    GLuint imgTextures[2];
    bool m_eglImageSupported : 1;
    bool m_eglImagesInitialized : 1;
    bool m_eglImageCheck : 1; // We must not send a grabed frame before this is true
};

QT_END_NAMESPACE

#endif