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Barcode::NW7(3)	      User Contributed Perl Documentation      Barcode::NW7(3)

NAME
       GD::Barcode::NW7 - Create NW7 barcode image with GD

SYNOPSIS
       ex. CGI

	 use GD::Barcode::NW7;
	 binmode(STDOUT);
	 print "Content-Type: image/png\n\n";
	 print GD::Barcode::NW7->new('123456789012')->plot->png;

       with Error Check

	 my $oGdBar = GD::Barcode::NW7->new('123456789E');
	 die $GD::Barcode::NW7::errStr unless($oGdBar);	       #Invalid Characters

DESCRIPTION
       GD::Barcode::NW7 is a subclass of GD::Barcode and allows you to create
       NW7 barcode image with GD.  This module based on "Generate Barcode Ver
       1.02 By Shisei Hanai 97/08/22".

   new
       $oGdBar = GD::Barcode::NW7->new($sTxt);

       Constructor.  Creates a GD::Barcode::NW7 object for $sTxt.  $sTxt has
       variable length string with (0-9, - $ / . + ABCD).

   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::NW7->new('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::NW7->new('123456789012');
	 my $sPtn = $oGdB->barcode();
	 # $sPtn = '';

   $errStr
       $GD::Barcode::NW7::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::NW7 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::Barcode

perl v5.14.1			  2003-05-29		       Barcode::NW7(3)

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