6 const unsigned char *buf)
void DRV_draw_bitmap(int ncols, int nrows, int threshold, const unsigned char *buf)
void DRV_draw_point(int x, int y)
void(* draw_point)(int, int)
void DRV_draw_line(int x0, int y0, int x1, int y1)
void(* draw_line)(int, int, int, int)
void(* draw_bitmap)(int, int, int, const unsigned char *)