/**
   * Create output
   */
  function render($mode, &$renderer, $data) {
    global $conf;
    global $gr_ext;
    $gr_ext='png';
    $grf_ext='.'.$gr_ext;
    if($data[1] == 'map' && strlen($data[0]) > 1) {
      if ( !is_dir($conf['mediadir'] . '/graphviz') ) 
	io_mkdir_p($conf['mediadir'] . '/graphviz'); //Using dokuwiki framework
      $hash = md5(serialize($data));
      $filename = $conf['mediadir'] . '/graphviz/'.$hash.$grf_ext;
      $url = ml('graphviz:'.$hash.$grf_ext); //Using dokuwiki framework

      //$renderer->doc .= '<p> valor filename=['.$filename.']</p>';
      //$renderer->doc .= '<p> valor url=['.$url .']</p>';

      // if already exist render
      if ( is_readable($filename) ) {
	// cached.

        // generate the map to variable
        $kk1 = "sed '1d'|sed '\$d'";
        $cmd = "echo '$data[0]' | /usr/bin/dot -Tcmapx | ".$kk1;
 	//$renderer->doc .= '<p> DSP-graph value cmd=>['.$cmd.']</p>'; //Debug cmd
        exec( $cmd, $map);
        //$renderer->doc .= '<p> valor map=['.$map .']</p>';
        $maphtml = implode("\n",$map);
        // add the target - cant do this with DOT
        $maphtml = str_replace("<area ", "<area target=\"".$hash."\" ",$maphtml);

        // Include Map in the page
	$renderer->doc .= '<map id="'.$hash.'" name="'.$hash.'">';
 	$renderer->doc .= $maphtml;
 	$renderer->doc .= '</map>';

        // Link the Image below with the map above by hash
	$renderer->doc .= '<img src="'.$url.'" border="0" usemap="#'.$hash.'" Ismap>';

	return true;
      }

      if (!$this->createImageMap($filename, $data[0], $data[1])) {

        // generate the map 
        $kk1 = "sed '1d'|sed '\$d'";
        $cmd = "echo '$data[0]' | /usr/bin/dot -Tcmapx | ".$kk1;
 	//$renderer->doc .= '<p> CR-graph value cmd=>['.$cmd.']</p>'; //Debug cmd
        exec( $cmd, $map);
        $maphtml= implode("\n",$map);
        // add the target - cant do this with DOT
        $maphtml=str_replace("<area ", "<area target=\"".$hash."\"",$maphtml);

        // Include Map in the page
	$renderer->doc .= '<map id="'.$hash.'" name="'.$hash.'">';
 	$renderer->doc .= $maphtml;
 	$renderer->doc .= '</map>';

        // Link the Image below with the map above by hash
	$renderer->doc .= '<img src="'.$url.'" border="0" usemap="#'.$hash.'" Ismap>';

      } else {
	$renderer->doc .= '**ERROR RENDERING GRAPHVIZ**';
      }
      return true;
   }