r128fb_bitblt
r128fb_bitblt(sc, xs, y, xd, y, width, height, R128_ROP3_S);
r128fb_bitblt(sc, x, ys, x, yd, width, height, R128_ROP3_S);
static void r128fb_bitblt(void *, int, int, int, int, int,
sc->sc_gc.gc_bitblt = r128fb_bitblt;
r128fb_bitblt(sc, x, y, x, y, wi, he, R128_ROP3_Dn);
r128fb_bitblt(sc, x, y, x, y, wi, he, R128_ROP3_Dn);