/**
* @inheritdoc
*/
public function convertUnitOfMeasure($measurement, $startUnit, $resultUnit, $round = true)
{
if ($startUnit === self::DOTS_PER_INCH) {
switch ($resultUnit) {
case self::DOTS_PER_CENTIMETER:
$measurement *= 2.54;
break;
}
} elseif ($startUnit === self::DOTS_PER_CENTIMETER) {
switch ($resultUnit) {
case self::DOTS_PER_INCH:
$measurement /= 2.54;
break;
}
} elseif ($startUnit === self::UNIT_INCHES) {
switch ($resultUnit) {
case self::DOTS_PER_INCH:
$measurement *= $this->dpi;
break;
case self::DOTS_PER_CENTIMETER:
$measurement *= 2.54 * $this->dpi;
break;
}
}
return parent::convertUnitOfMeasure($measurement, $startUnit, $resultUnit, $round);
}