win_enabled
if (win_enabled) {
if (win_enabled) {
win_enabled ^= 1;
if (win_enabled)
vop->win_enabled |= BIT(win_index);
unsigned int win_enabled;
vop->win_enabled &= ~BIT(VOP_WIN_TO_INDEX(vop_win));
enabled && (vop->win_enabled & BIT(i)));