/**
* Embeds position adjustment patterns if required.
*
* @param Version $version
* @param ByteMatrix $matrix
* @return void
*/
protected static function maybeEmbedPositionAdjustmentPatterns(Version $version, ByteMatrix $matrix)
{
if ($version->getVersionNumber() < 2) {
return;
}
$index = $version->getVersionNumber() - 1;
$coordinates = self::$positionAdjustmentPatternCoordinateTable[$index];
$numCoordinates = count($coordinates);
for ($i = 0; $i < $numCoordinates; $i++) {
for ($j = 0; $j < $numCoordinates; $j++) {
$y = $coordinates[$i];
$x = $coordinates[$j];
if ($x === null || $y === null) {
continue;
}
if ($matrix->get($x, $y) === -1) {
self::embedPositionAdjustmentPattern($x - 2, $y - 2, $matrix);
}
}
}
}
