machfb_fillrect
void machfb_fillrect(struct machfb_softc *, int, int, int, int, int);
machfb_fillrect(sc, 0, 0, ri->ri_width, ri->ri_height,
machfb_fillrect(sc, ri->ri_xorigin + col, ri->ri_yorigin + row,
machfb_fillrect(sc, x, y, w, num, ri->ri_devcmap[bg]);