LCCR3_PDFOR_3
case 16: lccr3 |= var->transp.length ? LCCR3_PDFOR_3 : 0; break;
case 18: lccr3 |= LCCR3_PDFOR_3; break;
case 24: lccr3 |= var->transp.length ? LCCR3_PDFOR_2 : LCCR3_PDFOR_3;