/**
* Create a thumbnail from a file
*
* @param string $file
* @param string $thumb
* @param int $size
*/
protected function createThumb($file, $thumb, $size)
{
// open file a image resource
$img = ImageLib::make($file);
// crop the best fitting 1:1 ratio and resize to the size given
$img->grab($size);
// save the same file as jpeg with default quality
$img->save($thumb);
}
