# GD::Barcode - phpMan

## NAME
    [GD::Barcode] - Create barcode image with GD

## SYNOPSIS
    *ex. CGI*

      use [GD::Barcode::UPCE];
      binmode(STDOUT);
      print "Content-Type: image/png\n\n";
      print [GD::Barcode]->new('EAN13', '123456789012')->plot->png;

    *with Error Check*

      my $oGdBar = [GD::Barcode]->new('EAN13', '12345678901');
      die $[GD::Barcode::errStr] unless($oGdBar);     #Invalid Length
      $oGdBar->plot->png;

## DESCRIPTION
    [GD::Barcode] is a subclass of GD and allows you to create barcode image
    with GD. This module based on "Generate Barcode Ver 1.02 By Shisei Hanai
    97/08/22".

    From 1.14, you can use this module even if no GD (except plot method).

  new
    *$oGdBar* = [GD::Barcode::UPCE]->new(*$sType*, *$sTxt*);

    Constructor. Creates a [GD::Barcode]::*$sType* object for *$sTxt*.

  plot()
    *$oGd* = $oGdBar->plot([Height => *$iHeight*, NoText => *0 | 1*]);

    creates GD object with barcode image for the *$sTxt* specified at new
    method. *$iHeight* is height of the image. If *NoText* is 1, the image
    has no text image of *$sTxt*.

     ex.
      my $oGdB = [GD::Barcode]->new('EAN13', '123456789012');
      my $oGD = $oGdB->plot(NoText=>1, Height => 20);
      # $sGD is a GD image with Height=>20 pixels, with no text.

  barcode()
    *$sPtn* = $oGdBar->barcode();

    returns a barcode pattern in string with '1' and '0'. '1' means black,
    '0' means white.

     ex.
      my $oGdB = [GD::Barcode]->new('UPCE', '123456789012');
      my $sPtn = $oGdB->barcode();
      # $sPtn = '';

  $errStr
    $[GD::Barcode::errStr]

    has error message.

  $text
    $oGdBar->{$text}

    has barcode text based on *$sTxt* specified in new method.

## AUTHOR
    Kawai Takanori <GCD00051@nifty.ne.jp>

## COPYRIGHT
    The [GD::Barocde] module is Copyright (c) 2000 Kawai Takanori. Japan. All
    rights reserved.

    You may distribute under the terms of either the GNU General Public
    License or the Artistic License, as specified in the Perl README file.

## SEE ALSO
    GD [GD::Barcode] subclasses