veritefb_bitblt
if (!veritefb_bitblt(sc, x, sy, x, dy, w, h))
if (!veritefb_bitblt(sc, sx, y, dx, y, w, h))
(void)veritefb_bitblt(sc, xs, ys, xd, yd, wi, he);
static bool veritefb_bitblt(struct veritefb_softc *, int, int, int, int,