class Greeter {

    private LightDM.Greeter greeter;
    private Gtk.Window main_win;

    public Greeter() {

        greeter = new LightDM.Greeter();
        main_win = new Gtk.Window();
        var screen = Gdk.Screen.get_default();
        Gdk.Rectangle geo;


        screen.get_monitor_geometry(screen.get_primary_monitor(), out geo);
        main_win.set_default_size(geo.width, geo.height);
        main_win.move(geo.x, geo.y);

        var pixbuf = new Gdk.Pixbuf.from_file ("greeter.png");
        var s = createRootSurface(Gdk.Display.get_default());
        var c = new Cairo.Context(s);
        Gdk.cairo_set_source_pixbuf(c, pixbuf, 0,0);
        c.paint();

        Gdk.flush();
        X.ClearWindow (Gdk.X11Display.get_xdisplay (screen.get_display ()), Gdk.X11Window.get_xid (screen.get_root_window ()));
        main_win.show_all();

    }

    private static Cairo.Surface? createRootSurface(Gdk.Screen screen) {

        var visual = screen.get_system_visual();

        Gdk.flush();

        var display = new X.Display(screen.get_display().get_name());

        if (display == null) return null;

        display.set_close_down_mode(X.RetainPermanent);

        var pixmap = X.CreatePixmap(display, Gdk.X11Window.get_xid(screen.get_root_window()), screen.width(), screen.height(), visual.get_depth());
        unowned X.Display xdisplay = Gdk.X11Display.get_xdisplay(screen.get_display());
        var surface = new Cairo.XlibSurface(xdisplay, pixmap, Gdk.X11Visual.get_xvisual(visual), screen.width(), screen.height());

        X.SetWindowBackgroundPixmap(xdisplay, Gdk.X11Window.get_xid(screen.get_root_window()), surface.get_drawable());

        return surface;
    }

    static int main(string[] args) {

        Gtk.init(ref args);

        var greeter = new Greeter();

        Gtk.main();

        return 0;

    }

}