barcode::upce(3)

NAME

GD::Barcode::UPCE - Create UPC-E barcode image with GD

SYNOPSIS

ex. CGI
  use GD::Barcode::UPCE;
  binmode(STDOUT);
  print "Content-Type: image/png0;
  print GD::Barcode::UPCE->new('123456')->plot->png;
with Error Check
  my $oGdBar = GD::Barcode::UPCE->new('123456789');
  die     $GD::Barcode::UPCE::errStr      unless($oGdBar);
#Invalid Length

DESCRIPTION

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

new

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

Constructor. Creates a GD::Barcode::UPCE object for
$sTxt. $sTxt has 6 or 7 or 8 numeric characters([0-9]). If $sTxt has 6 characters, this module adds '0' at the
front of $sTxt. and calculates CD for you. If $sTxt has 7 characters, this module calaculates CD for you.

plot()

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

creates GD object with barcode image for the $sTxt speci
fied 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::UPCE->new('123456');
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', 'G' and '0'.
'1' means black, 'G' also means black but little bit long,
'0' means white.

ex.

my $oGdB = GD::Barcode::UPCE->new('123456');
my $sPtn = $oGdB->barcode();
# $sPtn = '';

$errStr

$GD::Barcode::UPCE::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::UPCE module is Copyright (c) 2000 Kawai
Takanori. Japan. All rights reserved.

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

SEE ALSO

GD::Barcode

perl v5.8.0 2000-12-29 Barcode::UPCE(3)