GD::Barcode::UPCA(3) Create UPC-A barcode image with GD


ex. CGI

use GD::Barcode::UPCA;
print "Content-Type: image/png\n\n";
print GD::Barcode::UPCA->new('12345678901')->plot->png;

with Error Check

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


GD::Barcode::UPCA is a subclass of GD::Barcode and allows you to create UPC-A barcode image with GD. This module based on ``Generate Barcode Ver 1.02 By Shisei Hanai 97/08/22''.


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

Constructor. Creates a GD::Barcode::UPCA object for $sTxt. $sTxt has 11 or 12 numeric characters([0-9]). If $sTxt has 11 characters, this module calacurates CD for you.


$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.

  my $oGdB = GD::Barcode::UPCA->new('12345678901');
  my $oGD = $oGdB->plot(NoText=>1, Height => 20);
  # $sGD is a GD image with Height=>20 pixels, with no text.


$sPtn = $oGdBar->barcode();

returns a barcode pattern in string with '1', 'G' and '0'. '1' means black, 'G' also means black but little bit long, '0' means white.

  my $oGdB = GD::Barcode::UPCA->new('12345678901');
  my $sPtn = $oGdB->barcode();
  # $sPtn = '';



has error message.



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


Kawai Takanori [email protected]


The GD::Barocde::UPCA 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.