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- package GD::Barcode::NW7;
- use strict;
- BEGIN { eval{require 'GD.pm';}; };
- use GD::Barcode;
- require Exporter;
- use vars qw($VERSION @ISA $errStr);
- @ISA = qw(GD::Barcode Exporter);
- $VERSION=1.10;
- my $nw7Bar = {
- '0' => '0000011',
- '1' => '0000110',
- '2' => '0001001',
- '3' => '1100000',
- '4' => '0010010',
- '5' => '1000010',
- '6' => '0100001',
- '7' => '0100100',
- '8' => '0110000',
- '9' => '1001000',
- '-' => '0001100',
- '$' => '0011000',
- ':' => '1000101',
- '/' => '1010001',
- '.' => '1010100',
- '+' => '0010101',
- 'A' => '0011010',
- 'B' => '0101001',
- 'C' => '0001011',
- 'D' => '0001110'
- };
- #------------------------------------------------------------------------------
- # new (for GD::Barcode::NW7)
- #------------------------------------------------------------------------------
- sub new($$) {
- my($sClass, $sTxt) = @_;
- $errStr ='';
- my $oThis = {};
- bless $oThis;
- return undef if($errStr = $oThis->init($sTxt));
- return $oThis;
- }
- #------------------------------------------------------------------------------
- # init (for GD::Barcode::NW7)
- #------------------------------------------------------------------------------
- sub init($$\%){
- my($oThis, $sTxt) =@_;
- #Check
- return 'Invalid Characters' if($sTxt =~ /[^0-9\-\$:\/.+ABCD]/);
-
- #CalcCd
- $oThis->{text} = $sTxt;
- return '';
- }
- #------------------------------------------------------------------------------
- # barcode (for GD::Barcode::NW7)
- #------------------------------------------------------------------------------
- sub barcode($) {
- my($oThis) = @_;
- my($sWk, $sRes);
-
- my $sTxt = $oThis->{text};
- $sRes = '';
- foreach $sWk (split(//, $sTxt)) {
- $sRes .= GD::Barcode::dumpCode( $nw7Bar->{$sWk} .'0' );
- }
- return $sRes;
- }
- #------------------------------------------------------------------------------
- # plot (for GD::Barcode::NW7)
- #------------------------------------------------------------------------------
- sub plot($%) {
- my($oThis, %hParam) =@_;
-
- my $sTxt = $oThis->{text};
- my $sPtn = $oThis->barcode();
- #Create Image
- my $iHeight = ($hParam{Height})? $hParam{Height} : 50;
- my ($oGd, $cBlack);
- if($hParam{NoText}) {
- ($oGd, $cBlack) = GD::Barcode::plot($sPtn, length($sPtn), $iHeight, 0, 0);
- }
- else {
- my($fW,$fH) = (GD::Font->Small->width, GD::Font->Small->height);
- my $iWidth = length($sPtn);
- #Bar Image
- ($oGd, $cBlack) = GD::Barcode::plot($sPtn, $iWidth, $iHeight, $fH, 0);
-
- #String
- $oGd->string(GD::Font->Small, (length($sPtn)-$fW*(length($sTxt)))/2, $iHeight - $fH,
- $sTxt, $cBlack);
- }
- return $oGd;
- }
- 1;
- __END__
-
-
-
- =head1 NAME
-
- GD::Barcode::NW7 - Create NW7 barcode image with GD
-
- =head1 SYNOPSIS
-
- I<ex. CGI>
-
- use GD::Barcode::NW7;
- binmode(STDOUT);
- print "Content-Type: image/png\n\n";
- print GD::Barcode::NW7->new('123456789012')->plot->png;
-
- I<with Error Check>
-
- my $oGdBar = GD::Barcode::NW7->new('123456789E');
- die $GD::Barcode::NW7::errStr unless($oGdBar); #Invalid Characters
-
- =head1 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".
-
- =head2 new
-
- I<$oGdBar> = GD::Barcode::NW7->new(I<$sTxt>);
-
- Constructor.
- Creates a GD::Barcode::NW7 object for I<$sTxt>.
- I<$sTxt> has variable length string with (0-9, - $ / . + ABCD).
-
- =head2 plot()
-
- I<$oGd> = $oGdBar->plot([Height => I<$iHeight>, NoText => I<0 | 1>]);
-
- creates GD object with barcode image for the I<$sTxt> specified at L<new> method.
- I<$iHeight> is height of the image. If I<NoText> is 1, the image has no text image of I<$sTxt>.
-
- ex.
- my $oGdB = GD::Barcode::NW7->new('123456789012');
- my $oGD = $oGdB->plot(NoText=>1, Height => 20);
- # $sGD is a GD image with Height=>20 pixels, with no text.
-
- =head2 barcode()
-
- I<$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 = '';
-
- =head2 $errStr
-
- $GD::Barcode::NW7::errStr
-
- has error message.
-
- =head2 $text
-
- $oGdBar->{$text}
-
- has barcode text based on I<$sTxt> specified in L<new> method.
-
- =head1 AUTHOR
-
- Kawai Takanori GCD00051@nifty.ne.jp
-
- =head1 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.
-
- =head1 SEE ALSO
-
- GD::Barcode
-
- =cut
-