Function select_offscreen_port

outdated/sys/mac/mactty.c:441–449

* Use offscreen drawing - lock the pixels through use_port */

 * Use offscreen drawing - lock the pixels through use_port
 */
static void
select_offscreen_port(tty_record *record)
{
    if (record->uses_gworld) {
        use_port(record, record->offscreen_world);
    } else {
        use_port(record, record->offscreen_port);
    }
}

/*
 * Use the window - unlock pixels