function getServerFeatures()
    {
        $features = array();
        $features['gd_version'] = $this->_gd_version_number;
        $features['gif'] = $this->_types[1]['supported'];
        $features['jpg'] = $this->_types[2]['supported'];
        $features['png'] = $this->_types[3]['supported'];
        $features['ttf'] = $this->_gd_ttf;
        return $features;
    }