function &get_type1($name, $encoding)
 {
     if (!isset($this->fonts[$name][$encoding])) {
         global $g_font_resolver;
         $font =& Font::create($name, $encoding, $g_font_resolver, $this->error_message);
         if (is_null($font)) {
             $dummy = null;
             return $dummy;
         }
         $this->fonts[$name][$encoding] = $font;
     }
     return $this->fonts[$name][$encoding];
 }