GdkPixbuf *ResizeImage(GdkPixbuf *pixbuf)
{
  int orig_width = gdk_pixbuf_get_width(pixbuf);
  int orig_height = gdk_pixbuf_get_height(pixbuf);

  if (orig_width > 640 || orig_height > 480) {
     orig_width = 640;
     orig_height = 480;
  }
  GdkPixbuf *new_pixbuf = gdk_pixbuf_scale_simple(pixbuf, orig_width, orig_height, GDK_INTERP_BILINEAR);
  return new_pixbuf;
}