/**
* Helper function for applyMaskPenaltyRule1.
*
* We need this for doing this calculation in both vertical and horizontal
* orders respectively.
*
* @param ByteMatrix $matrix
* @param boolean $isHorizontal
* @return integer
*/
protected static function applyMaskPenaltyRule1Internal(ByteMatrix $matrix, $isHorizontal)
{
$penalty = 0;
$iLimit = $isHorizontal ? $matrix->getHeight() : $matrix->getWidth();
$jLimit = $isHorizontal ? $matrix->getWidth() : $matrix->getHeight();
$array = $matrix->getArray();
for ($i = 0; $i < $iLimit; $i++) {
$numSameBitCells = 0;
$prevBit = -1;
for ($j = 0; $j < $jLimit; $j++) {
$bit = $isHorizontal ? $array[$i][$j] : $array[$j][$i];
if ($bit === $prevBit) {
$numSameBitCells++;
} else {
if ($numSameBitCells >= 5) {
$penalty += self::N1 + ($numSameBitCells - 5);
}
$numSameBitCells = 1;
$prevBit = $bit;
}
}
if ($numSameBitCells >= 5) {
$penalty += self::N1 + ($numSameBitCells - 5);
}
}
return $penalty;
}
