/**
* Revert the mask removal done while reading the code words. The bit matrix should revert to its original state.
*/
function remask()
{
if ($this->parsedFormatInfo == null) {
return;
// We have no format information, and have no data mask
}
$dataMask = DataMask::forReference($this->parsedFormatInfo->getDataMask());
$dimension = $this->bitMatrix->getHeight();
$dataMask->unmaskBitMatrix($this->bitMatrix, $dimension);
}
}
abstract function isMasked($i, $j);
/**
* @param reference a value between 0 and 7 indicating one of the eight possible
* data mask patterns a QR Code may use
* @return DataMask encapsulating the data mask pattern
*/
static function forReference($reference)
{
if ($reference < 0 || $reference > 7) {
throw new InvalidArgumentException();
}
return self::$DATA_MASKS[$reference];
}
}
DataMask::Init();
/**
* 000: mask bits for which (x + y) mod 2 == 0
*/
final class DataMask000 extends DataMask
{
// @Override
function isMasked($i, $j)
{
return ($i + $j & 0x1) == 0;
}
}
/**
* 001: mask bits for which x mod 2 == 0
*/
final class DataMask001 extends DataMask
