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资源说明：Perl GD::Barcode module
NAME
GD::Barcode - Create barcode images 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', '123456');
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
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