source: documentation/trunk/packages/dokuwiki-2011-05-25a/lib/plugins/captcha/figlet.php@ 25027

<?php
/*        _         _____  _       _       _
 *   ___ | |_  ___ |   __||_| ___ | | ___ | |_
 *  | . ||   || . ||   __|| || . || || -_||  _|
 *  |  _||_|_||  _||__|   |_||_  ||_||___||_|
 *  |_|       |_|            |___|
 *
 *  Author   :      Lucas Baltes ([email protected])
 *                  $Author: lhb $
 *
 *  Website  :      http://www.thebobo.com/
 *
 *  Date     :      $Date: 2003/03/16 10:08:01 $
 *  Rev      :      $Revision: 1.0 $
 *
 *  Copyright:      2003 - Lucas Baltes
 *  License  :      GPL - http://www.gnu.org/licenses/gpl.html
 *
 *  Purpose  :      Figlet font class
 *
 *  Comments :      phpFiglet is a php class to somewhat recreate the
 *                  functionality provided by the original figlet program
 *                  (http://www.figlet.org/). It does not (yet) support the
 *                  more advanced features like kerning or smushing. It can
 *                  use the same (flf2a) fonts as the original figlet program
 *                  (see their website for more fonts).
 *
 *  Usage    :      $phpFiglet = new phpFiglet();
 *
 *                  if ($phpFiglet->loadFont("fonts/standard.flf")) {
 *                      $phpFiglet->display("Hello World");
 *                  } else {
 *                      trigger_error("Could not load font file");
 *                  }
 *
 */


class phpFiglet
{

    /*
     *  Internal variables
     */

    var $signature;
    var $hardblank;
    var $height;
    var $baseline;
    var $maxLenght;
    var $oldLayout;
    var $commentLines;
    var $printDirection;
    var $fullLayout;
    var $codeTagCount;
    var $fontFile;


    /*
     *  Contructor
     */

    function phpFiglet()
    {

    }


    /*
     *  Load an flf font file. Return true on success, false on error.
     */

    function loadfont($fontfile)
    {
        $this->fontFile = @file($fontfile);
        if (!$this->fontFile) return false;

        $hp = explode(" ", $this->fontFile[0]); // get header

        $this->signature = substr($hp[0], 0, strlen($hp[0]) -1);
        $this->hardblank = substr($hp[0], strlen($hp[0]) -1, 1);
        $this->height = $hp[1];
        $this->baseline = $hp[2];
        $this->maxLenght = $hp[3];
        $this->oldLayout = $hp[4];
        $this->commentLines = $hp[5] + 1;
        $this->printDirection = $hp[6];
        $this->fullLayout = $hp[7];
        $this->codeTagCount = $hp[8];

        unset($hp);

        if ($this->signature != "flf2a") {
            return false;
        } else {
            return true;
        }
    }


    /*
     *  Get a character as a string, or an array with one line
     *  for each font height.
     */

    function getCharacter($character, $asarray = false)
    {
        $asciValue = ord($character);
        $start = $this->commentLines + ($asciValue - 32) * $this->height;
        $data = ($asarray) ? array() : "";

        for ($a = 0; $a < $this->height; $a++)
        {
            $tmp = $this->fontFile[$start + $a];
            $tmp = str_replace("@", "", $tmp);
            //$tmp = trim($tmp);
            $tmp = str_replace($this->hardblank, " ", $tmp);

            if ($asarray) {
                $data[] = $tmp;
            } else {
                $data .= $tmp;
            }
        }

        return $data;
    }


    /*
     *  Returns a figletized line of characters.
     */

    function fetch($line)
    {
        $ret = "";

        for ($i = 0; $i < (strlen($line)); $i++)
        {
            $data[] = $this->getCharacter($line[$i], true);
        }

        @reset($data);

        for ($i = 0; $i < $this->height; $i++)
        {
            while (list($k, $v) = each($data))
            {
                $ret .= str_replace("\n", "", $v[$i]);
            }
            reset($data);
            $ret .= "\n";
        }

        return $ret;
    }


    /*
     *  Display (print) a figletized line of characters.
     */

    function display($line)
    {
        print $this->fetch($line);
    }

}
?>