/**
* Construct a new gravity action
*
* @param \Karla\Program $program
* The program to use
* @param string $gravity
* Gravity
*
* @throws \InvalidArgumentException If the supplied gravity is not supported by imagemagick.
*/
public function __construct($program, $gravity)
{
if (!Support::gravity($program, $gravity)) {
$message = 'The supplied gravity (' . $gravity . ') is not supported by imagemagick';
throw new \InvalidArgumentException($message);
}
$this->gravity = $gravity;
}
