public static function calculateWidthAndHeight(sfImagePoolImage $image, $w, $h)
 {
     $sfthumb = new sfThumbnail($w, $h, true, sfConfig::get('app_sf_image_pool_inflate', true));
     $sfthumb->loadFile($image->getPathToOriginalFile());
     $response = array($sfthumb->getThumbWidth(), $sfthumb->getThumbHeight());
     unset($sfthumb);
     return $response;
 }