x = (width - m->mask->w) / 2;
y = (height - m->mask->h) / 2;
XSetClipMask(ob_display, m->color->gc, m->mask->mask);
XSetClipOrigin(ob_display, m->color->gc, x, y);
x = (width - m->mask->w) / 2;
y = (height - m->mask->h) / 2;
XSetClipMask(ob_display, m->color->gc, m->mask->mask);
XSetClipOrigin(ob_display, m->color->gc, x, y);