cfxga_standalone_rop
return cfxga_standalone_rop(scr, ROP_SRC, sx, y, dx, y, cx, cy);
return cfxga_standalone_rop(scr, ROP_SRC, x, sy, x, dy, cx, cy);
return cfxga_standalone_rop(scr, ROP_ONES ^ ROP_SRC /* i.e. not SRC */,
int cfxga_standalone_rop(struct cfxga_screen *, u_int,