$chr = $line->[$col] || $blank;
$atr = $arow->[$col];
$array_position++;
$curr_attribs = $atr->[AS_BG] . $atr->[AS_FG] . $atr->[AS_U] . $atr->[AS_BOLD] . $atr->[AS_BLINK];
if ($curr_attribs ne $last_attribs) {
  $a[$array_position] = _attr($atr) . $chr;
} else {
  $a[$array_position] = $chr;
}
$last_attribs = $curr_attribs;