unsigned long	     mask;
_cairo_xlib_surface_set_repeat (void *abstract_surface, int repeat){    cairo_xlib_surface_t *surface = abstract_surface;    unsigned long mask;    XRenderPictureAttributes pa;    if (!surface->picture)	return CAIRO_STATUS_SUCCESS;        mask = CPRepeat;    pa.repeat = repeat;    XRenderChangePicture (surface->dpy, surface->picture, mask, &pa);    return CAIRO_STATUS_SUCCESS;}