protected function _setDefaultAttribs(&$options) {
        $options = $options instanceof Garp_Util_Configuration ?
            $options : new Garp_Util_Configuration($options);
        $options
            ->setDefault('height', isset($options['width']) ? round($options['width']*0.55) : 264)
            ->setDefault('width', 480)
            ->setDefault('attribs', array());
    }