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<?
/*
 * PHP-Barcode 0.4
 
 * PHP-Barcode generates
 *   - Barcode-Images using libgd2 (png, jpg, gif)
 *   - HTML-Images (using 1x1 pixel and html-table)
 *   - silly Text-Barcodes
 *
 * PHP-Barcode encodes using
 *   - a built-in EAN-13/ISBN Encoder
 *   - genbarcode (by Folke Ashberg), a command line
 *     barcode-encoder which uses GNU-Barcode
 *     genbarcode can encode EAN-13, EAN-8, UPC, ISBN, 39, 128(a,b,c),
 *     I25, 128RAW, CBR, MSI, PLS
 *     genbarcode is available at www.ashberg.de/php-barcode
 
 * (C) 2001,2002,2003,2004,2011 by Folke Ashberg <folke@ashberg.de>
 
 * The newest version can be found at http://www.ashberg.de/php-barcode
 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



/* CONFIGURATION */

/* ******************************************************************** */
/*                          COLORS                                      */
/* ******************************************************************** */
$bar_color=Array(0,0,0);
$bg_color=Array(255,255,255);
$text_color=Array(0,0,0);


/* ******************************************************************** */
/*                          FONT FILE                                   */
/* ******************************************************************** */
/* location the the ttf-font */

$font_loc=dirname(__FILE__)."/"."FreeSansBold.ttf";

/* ******************************************************************** */
/*                          GENBARCODE                                  */
/* ******************************************************************** */
/* location of 'genbarcode'
 * leave blank if you don't have them :(
 * genbarcode is needed to render encodings other than EAN-12/EAN-13/ISBN
 */

//$genbarcode_loc="c:\winnt\genbarcode.exe";
$genbarcode_loc="/usr/local/bin/genbarcode";


/* CONFIGURATION ENDS HERE */

require("encode_bars.php"); /* build-in encoders */

/*
 * barcode_outimage(text, bars [, scale [, mode [, total_y [, space ]]]] )
 *
 *  Outputs an image using libgd
 *
 *    text   : the text-line (<position>:<font-size>:<character> ...)
 *    bars   : where to place the bars  (<space-width><bar-width><space-width><bar-width>...)
 *    scale  : scale factor ( 1 < scale < unlimited (scale 50 will produce
 *                                                   5400x300 pixels when
 *                                                   using EAN-13!!!))
 *    mode   : png,gif,jpg, depending on libgd ! (default='png')
 *    total_y: the total height of the image ( default: scale * 60 )
 *    space  : space
 *             default:
 *              $space[top]   = 2 * $scale;
 *              $space[bottom]= 2 * $scale;
 *              $space[left]  = 2 * $scale;
 *              $space[right] = 2 * $scale;
 */



function barcode_outimage($text, $bars, $scale = 1, $mode = "png",
            $total_y = 0, $space = ''){
    global $bar_color, $bg_color, $text_color;
    global $font_loc;
    /* set defaults */
    if ($scale<1) $scale=2;
    $total_y=(int)($total_y);
    if ($total_y<1) $total_y=(int)$scale * 60;
    if (!$space)
      $space=array('top'=>2*$scale,'bottom'=>2*$scale,'left'=>2*$scale,'right'=>2*$scale);
   
    /* count total width */
    $xpos=0;
    $width=true;
    for ($i=0;$i<strlen($bars);$i++){
        $val=strtolower($bars[$i]);
        if ($width){
            $xpos+=$val*$scale;
            $width=false;
            continue;
        }
        if (preg_match("#[a-z]#", $val)){
            /* tall bar */
            $val=ord($val)-ord('a')+1;
        }
        $xpos+=$val*$scale;
        $width=true;
    }

    /* allocate the image */
    $total_x=( $xpos )+$space['right']+$space['right'];
    $xpos=$space['left'];
    if (!function_exists("imagecreate")){
        print "You don't have the gd2 extension enabled<BR>\n";
        print "<BR>\n";
        print "<BR>\n";
        print "Short HOWTO<BR>\n";
        print "<BR>\n";
        print "Debian: # apt-get install php4-gd2<BR>\n";
        print "<BR>\n";
        print "SuSE: ask YaST<BR>\n";
        print "<BR>\n";
        print "OpenBSD: # pkg_add /path/php4-gd-4.X.X.tgz (read output, you have to enable it)<BR>\n";
        print "<BR>\n";
        print "Windows: Download the PHP zip package from <A href=\"http://www.php.net/downloads.php\">php.net</A>, NOT the windows-installer, unzip the php_gd2.dll to C:\PHP (this is the default install dir) and uncomment 'extension=php_gd2.dll' in C:\WINNT\php.ini (or where ever your os is installed)<BR>\n";
        print "<BR>\n";
        print "<BR>\n";
        print "The author of php-barcode will give not support on this topic!<BR>\n";
        print "<BR>\n";
        print "<BR>\n";
        print "<A HREF=\"http://www.ashberg.de/php-barcode/\">Folke Ashberg's OpenSource PHP-Barcode</A><BR>\n";
        return "";
    }
    $im=imagecreate($total_x, $total_y);
    /* create two images */
    $col_bg=ImageColorAllocate($im,$bg_color[0],$bg_color[1],$bg_color[2]);
    $col_bar=ImageColorAllocate($im,$bar_color[0],$bar_color[1],$bar_color[2]);
    $col_text=ImageColorAllocate($im,$text_color[0],$text_color[1],$text_color[2]);
    $height=round($total_y-($scale*10));
    $height2=round($total_y-$space['bottom']);


    /* paint the bars */
    $width=true;
    for ($i=0;$i<strlen($bars);$i++){
        $val=strtolower($bars[$i]);
        if ($width){
            $xpos+=$val*$scale;
            $width=false;
            continue;
        }
        if (preg_match("#[a-z]#", $val)){
            /* tall bar */
            $val=ord($val)-ord('a')+1;
            $h=$height2;
        } else $h=$height;
        imagefilledrectangle($im, $xpos, $space['top'], $xpos+($val*$scale)-1, $h, $col_bar);
        $xpos+=$val*$scale;
        $width=true;
    }
    /* write out the text */
    global $_SERVER;
    $chars=explode(" ", $text);
    reset($chars);
    while (list($n, $v)=each($chars)){
        if (trim($v)){
            $inf=explode(":", $v);
            $fontsize=$scale*($inf[1]/1.8);
            $fontheight=$total_y-($fontsize/2.7)+2;
            @imagettftext($im, $fontsize, 0, $space['left']+($scale*$inf[0])+2,
            $fontheight, $col_text, $font_loc, $inf[2]);
        }
    }

    /* output the image */
    $mode=strtolower($mode);
    if ($mode=='jpg' || $mode=='jpeg'){
        header("Content-Type: image/jpeg; name=\"barcode.jpg\"");
        imagejpeg($im);
    } else if ($mode=='gif'){
        header("Content-Type: image/gif; name=\"barcode.gif\"");
        imagegif($im);
    } else {
        header("Content-Type: image/png; name=\"barcode.png\"");
        imagepng($im);
    }

}

/*
 * barcode_outtext(code, bars)
 *
 *  Returns (!) a barcode as plain-text
 *  ATTENTION: this is very silly!
 *
 *    text   : the text-line (<position>:<font-size>:<character> ...)
 *    bars   : where to place the bars  (<space-width><bar-width><space-width><bar-width>...)
 */


function barcode_outtext($code,$bars){
    $width=true;
    $xpos=$heigh2=0;
    $bar_line="";
    for ($i=0;$i<strlen($bars);$i++){
        $val=strtolower($bars[$i]);
        if ($width){
            $xpos+=$val;
            $width=false;
            for ($a=0;$a<$val;$a++) $bar_line.="-";
            continue;
        }
        if (preg_match("#[a-z]#", $val)){
            $val=ord($val)-ord('a')+1;
            $h=$heigh2;
            for ($a=0;$a<$val;$a++) $bar_line.="I";
        } else for ($a=0;$a<$val;$a++) $bar_line.="#";
        $xpos+=$val;
        $width=true;
    }
    return $bar_line;
}

/*
 * barcode_outhtml(text, bars [, scale [, total_y [, space ]]] )
 *
 *  returns(!) HTML-Code for barcode-image using html-code (using a table and with black.png and white.png)
 *
 *    text   : the text-line (<position>:<font-size>:<character> ...)
 *    bars   : where to place the bars  (<space-width><bar-width><space-width><bar-width>...)
 *    scale  : scale factor ( 1 < scale < unlimited (scale 50 will produce
 *                                                   5400x300 pixels when
 *                                                   using EAN-13!!!))
 *    total_y: the total height of the image ( default: scale * 60 )
 *    space  : space
 *             default:
 *              $space[top]   = 2 * $scale;
 *              $space[bottom]= 2 * $scale;
 *              $space[left]  = 2 * $scale;
 *              $space[right] = 2 * $scale;
 */




function barcode_outhtml($code, $bars, $scale = 1, $total_y = 0, $space = ''){
    /* set defaults */
    $total_y=(int)($total_y);
    if ($scale<1) $scale=2;
    if ($total_y<1) $total_y=(int)$scale * 60;
    if (!$space)
      $space=array('top'=>2*$scale,'bottom'=>2*$scale,'left'=>2*$scale,'right'=>2*$scale);


    /* generate html-code */
    $height=round($total_y-($scale*10));
    $height2=round($total_y)-$space['bottom'];
    $out=
      '<table border=0 cellspacing=0 cellpadding=0 bgcolor="white">'."\n".
      '<tr><td><img src="white.png" height="'.$space['top'].'" width="1" alt=" "></td></tr>'."\n".
      '<tr><td>'."\n".
      '<img src="white.png" height="'.$height2.'" width="'.$space['left'].'" alt="#"/>';
   
    $width=true;
    for ($i=0;$i<strlen($bars);$i++){
        $val=strtolower($bars[$i]);
        if ($width){
            $w=$val*$scale;
            if ($w>0) $out.='<img src="white.png" height="'.$total_y.'" width="'.$w.'" align="top" alt="" />';
            $width=false;
            continue;
        }
        if (preg_match("#[a-z]#", $val)){
            //hoher strich
            $val=ord($val)-ord('a')+1;
            $h=$height2;
        }else $h=$height;
        $w=$val*$scale;
        if ($w>0) $out.='<img src="black.png" height="'.$h.'" width="'.$w.'" align="top" />';
        $width=true;
    }
    $out.=
      '<img src="white.png" height="'.$height2.'" width=".'.$space['right'].'" />'.
      '</td></tr>'."\n".
      '<tr><td><img src="white.png" height="'.$space['bottom'].'" width="1"></td></tr>'."\n".
      '</table>'."\n";
    //for ($i=0;$i<strlen($bars);$i+=2) print $line[$i]."<B>".$line[$i+1]."</B>&nbsp;";
    return $out;
}


/* barcode_encode_genbarcode(code, encoding)
 *   encodes $code with $encoding using genbarcode
 *
 *   return:
 *    array[encoding] : the encoding which has been used
 *    array[bars]     : the bars
 *    array[text]     : text-positioning info
 */

function barcode_encode_genbarcode($code,$encoding){
    global $genbarcode_loc;
    /* delete EAN-13 checksum */
    if (preg_match("#^ean$#i", $encoding) && strlen($code)==13) $code=substr($code,0,12);
    if (!$encoding) $encoding="ANY";
    $encoding=preg_replace("#[|\\\\]#", "_", $encoding);
    $code=preg_replace("#[|\\\\]#", "_", $code);
    $cmd=$genbarcode_loc." "
        .escapeshellarg($code)." "
        .escapeshellarg(strtoupper($encoding))."";
    //print "'$cmd'<BR>\n";
    $fp=popen($cmd, "r");
    if ($fp){
        $bars=fgets($fp, 1024);
        $text=fgets($fp, 1024);
        $encoding=fgets($fp, 1024);
        pclose($fp);
    } else return false;
    $ret=array(
                "encoding" => trim($encoding),
                "bars" => trim($bars),
                "text" => trim($text)
              );
    if (!$ret['encoding']) return false;
    if (!$ret['bars']) return false;
    if (!$ret['text']) return false;
    return $ret;
}

/* barcode_encode(code, encoding)
 *   encodes $code with $encoding using genbarcode OR built-in encoder
 *   if you don't have genbarcode only EAN-13/ISBN is possible
 *
 * You can use the following encodings (when you have genbarcode):
 *   ANY    choose best-fit (default)
 *   EAN    8 or 13 EAN-Code
 *   UPC    12-digit EAN
 *   ISBN   isbn numbers (still EAN-13)
 *   39     code 39
 *   128    code 128 (a,b,c: autoselection)
 *   128C   code 128 (compact form for digits)
 *   128B   code 128, full printable ascii
 *   I25    interleaved 2 of 5 (only digits)
 *   128RAW Raw code 128 (by Leonid A. Broukhis)
 *   CBR    Codabar (by Leonid A. Broukhis)
 *   MSI    MSI (by Leonid A. Broukhis)
 *   PLS    Plessey (by Leonid A. Broukhis)
 *
 *   return:
 *    array[encoding] : the encoding which has been used
 *    array[bars]     : the bars
 *    array[text]     : text-positioning info
 */

function barcode_encode($code,$encoding){
    global $genbarcode_loc;
    if (
                ((preg_match("#^ean$#i", $encoding)
                 && ( strlen($code)==12 || strlen($code)==13)))
                 
                || (($encoding) && (preg_match("#^isbn$#i", $encoding))
                 && (( strlen($code)==9 || strlen($code)==10) ||
                 (((preg_match("#^978#", $code) && strlen($code)==12) ||
                  (strlen($code)==13)))))

                || (( !isset($encoding) || !$encoding || (preg_match("#^ANY$#i", $encoding) ))
                 && (preg_match("#^[0-9]{12,13}$#", $code)))
             
                ){
        /* use built-in EAN-Encoder */
        $bars=barcode_encode_ean($code, $encoding);
    } else if (file_exists($genbarcode_loc)){
        /* use genbarcode */
        $bars=barcode_encode_genbarcode($code, $encoding);
    } else {
        print "php-barcode needs an external programm for encodings other then EAN/ISBN<BR>\n";
        print "<ul>\n";
        print "<li>download gnu-barcode from <a href=\"http://www.gnu.org/software/barcode/\">www.gnu.org/software/barcode/</a></li>\n";
        print "<li>compile and install them</li>\n";
        print "<li>download genbarcode from <a href=\"http://www.ashberg.de/php-barcode/\">www.ashberg.de/php-barcode/</a></li>\n";
        print "<li>compile and install them</li>\n";
        print "<li>specify path to genbarcode in php-barcode.php</li>\n";
        print "</ul>\n";
        print "<br />\n";
        print "<a href=\"http://www.ashberg.de/php-barcode/\">Folke Ashberg's OpenSource PHP-Barcode</a><br />\n";
        return false;
    }
    return $bars;
}

/* barcode_print(code [, encoding [, scale [, mode ]]] );
 *
 *  encodes and prints a barcode
 *
 *   return:
 *    array[encoding] : the encoding which has been used
 *    array[bars]     : the bars
 *    array[text]     : text-positioning info
 */



function barcode_print($code, $encoding="ANY", $scale = 2 ,$mode = "png" ){
    $bars=barcode_encode($code,$encoding);
    if (!$bars) return;
    if (!$mode) $mode="png";
    if (preg_match("#^(text|txt|plain)$#i", $mode)) print barcode_outtext($bars['text'],$bars['bars']);
    elseif (preg_match("#^(html|htm)$#i", $mode)) print barcode_outhtml($bars['text'],$bars['bars'], $scale,0, 0);
    else barcode_outimage($bars['text'],$bars['bars'],$scale, $mode);
    return $bars;
}

?>