Function use_port

outdated/sys/mac/mactty.c:419–436

* Restore current port/world after a save */

 * Restore current port/world after a save
 */
static void
use_port(tty_record *record, void *port)
{
    if (record->uses_gworld) {
        PixMapHandle pix_map;

        SetGWorld((GWorldPtr) port, (GDHandle) 0);
        pix_map = GetGWorldPixMap(record->offscreen_world);
        if (pix_map) {
            if (port == record->offscreen_world)
                LockPixels(pix_map);
            else
                UnlockPixels(pix_map);
        }
    } else {
        SetPort((GrafPtr) port);
    }
}

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