# GD::Barcode::UPCA - phpMan

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

## SYNOPSIS
    *ex. CGI*

      use [GD::Barcode::UPCA];
      binmode(STDOUT);
      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

## DESCRIPTION
    [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".

  new
    *$oGdBar* = [GD::Barcode::UPCA]->new(*$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.

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

  $errStr
    $[GD::Barcode::UPCA::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::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.

## SEE ALSO
    [GD::Barcode]