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<?php
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/**
* Image_Barcode_Code39 class
*
* Image_Barcode_Code39 creates Code 3 of 9 ( Code39 ) barcode images. It's
* implementation borrows heavily for the perl module GD::Barcode::Code39
*
* PHP versions 4
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Image
* @package Image_Barcode
* @author Ryan Briones <ryanbriones@webxdesign.org>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id$
* @link http://pear.php.net/package/Image_Barcode
*/
require_once "Image/Barcode.php";
if (!function_exists('str_split')) {
require_once 'PHP/Compat.php';
PHP_Compat::loadFunction('str_split');
}
/**
* Image_Barcode_Code39 class
*
* Package which provides a method to create Code39 using GD library.
*
* @category Image
* @package Image_Barcode
* @author Ryan Briones <ryanbriones@webxdesign.org>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Barcode
* @since Image_Barcode 0.5
*/
class Image_Barcode_Code39 extends Image_Barcode
{
/**
* Barcode type
* @var string
*/
var $_type = 'Code39';
/**
* Barcode height
*
* @var integer
*/
var $_barcodeheight = 50;
/**
* Bar thin width
*
* @var integer
*/
var $_barthinwidth = 1;
/**
* Bar thick width
*
* @var integer
*/
var $_barthickwidth = 3;
/**
* Font size
*
* @var integer
*/
var $_font_size = 2;
/**
* Coding map
* @var array
*/
var $_coding_map = array(
'0' => '000110100',
'1' => '100100001',
'2' => '001100001',
'3' => '101100000',
'4' => '000110001',
'5' => '100110000',
'6' => '001110000',
'7' => '000100101',
'8' => '100100100',
'9' => '001100100',
'A' => '100001001',
'B' => '001001001',
'C' => '101001000',
'D' => '000011001',
'E' => '100011000',
'F' => '001011000',
'G' => '000001101',
'H' => '100001100',
'I' => '001001100',
'J' => '000011100',
'K' => '100000011',
'L' => '001000011',
'M' => '101000010',
'N' => '000010011',
'O' => '100010010',
'P' => '001010010',
'Q' => '000000111',
'R' => '100000110',
'S' => '001000110',
'T' => '000010110',
'U' => '110000001',
'V' => '011000001',
'W' => '111000000',
'X' => '010010001',
'Y' => '110010000',
'Z' => '011010000',
'-' => '010000101',
'*' => '010010100',
'+' => '010001010',
'$' => '010101000',
'%' => '000101010',
'/' => '010100010',
'.' => '110000100',
' ' => '011000100'
);
/**
* Constructor
*
* @param string $text A text that should be in the image barcode
* @param int $wThin Width of the thin lines on the barcode
* @param int $wThick Width of the thick lines on the barcode
*
* @author Ryan Briones <ryanbriones@webxdesign.org>
*
*/
function Image_Barcode_Code39( $text = '', $wThin = 0, $wThick = 0 )
{
// Check $text for invalid characters
if ( $this->checkInvalid( $text ) ) {
return false;
}
$this->text = $text;
if ( $wThin > 0 ) $this->_barthinwidth = $wThin;
if ( $wThick > 0 ) $this->_barthickwidth = $wThick;
return true;
}
/**
* Make an image resource using the GD image library
*
* @param bool $noText Set to true if you'd like your barcode to be sans text
* @param int $bHeight height of the barcode image including text
* @return resource The Barcode Image (TM)
*
* @author Ryan Briones <ryanbriones@webxdesign.org>
*
*/
function plot($noText = false, $bHeight = 0)
{
// add start and stop * characters
$final_text = '*' . $this->text . '*';
if ( $bHeight > 0 ) {
$this->_barcodeheight = $bHeight;
}
$barcode = '';
foreach ( str_split( $final_text ) as $character ) {
$barcode .= $this->_dumpCode( $this->_coding_map[$character] . '0' );
}
$barcode_len = strlen( $barcode );
// Create GD image object
$img = imagecreate( $barcode_len, $this->_barcodeheight );
// Allocate black and white colors to the image
$black = imagecolorallocate( $img, 0, 0, 0 );
$white = imagecolorallocate( $img, 255, 255, 255 );
$font_height = ( $noText ? 0 : imagefontheight( $this->_font_size ) );
$font_width = imagefontwidth( $this->_font_size );
// fill background with white color
imagefill( $img, 0, 0, $white );
// Initialize X position
$xpos = 0;
// draw barcode bars to image
if ( $noText ) {
foreach (str_split($barcode) as $character_code ) {
if ($character_code == 0 ) {
imageline($img, $xpos, 0, $xpos, $this->_barcodeheight, $white);
} else {
imageline($img, $xpos, 0, $xpos, $this->_barcodeheight, $black);
}
$xpos++;
}
} else {
foreach (str_split($barcode) as $character_code ) {
if ($character_code == 0) {
imageline($img, $xpos, 0, $xpos, $this->_barcodeheight - $font_height - 1, $white);
} else {
imageline($img, $xpos, 0, $xpos, $this->_barcodeheight - $font_height - 1, $black);
}
$xpos++;
}
// draw text under barcode
imagestring(
$img,
$this->_font_size,
( $barcode_len - $font_width * strlen( $this->text ) )/2,
$this->_barcodeheight - $font_height,
$this->text,
$black
);
}
return $img;
}
/**
* Send image to the browser; for Image_Barcode compaitbility
*
* @param string $text
* @param string $imgtype Image type; accepts jpg, png, and gif, but gif only works if you've payed for licensing
* @param bool $noText Set to true if you'd like your barcode to be sans text
* @param int $bHeight height of the barcode image including text
* @return gd_image GD image object
*
* @author Ryan Briones <ryanbriones@webxdesign.org>
*
*/
function &draw($text, $imgtype = 'png', $noText = false, $bHeight = 0)
{
// Check $text for invalid characters
if ($this->checkInvalid($text)) {
return PEAR::raiseError('Invalid text');
}
$this->text = $text;
$img = &$this->plot($noText, $bHeight);
return $img;
}
/**
* _dumpCode is a PHP implementation of dumpCode from the Perl module
* GD::Barcode::Code39. I royally screwed up when trying to do the thing
* my own way the first time. This way works.
*
* @param string $code Code39 barcode code
* @return string $result barcode line code
*
* @access private
*
* @author Ryan Briones <ryanbriones@webxdesign.org>
*
*
*/
function _dumpCode($code)
{
$result = '';
$color = 1; // 1: Black, 0: White
// if $bit is 1, line is wide; if $bit is 0 line is thin
foreach ( str_split( $code ) as $bit ) {
$result .= ( ( $bit == 1 ) ? str_repeat( "$color", $this->_barthickwidth ) : str_repeat( "$color", $this->_barthinwidth ) );
$color = ( ( $color == 0 ) ? 1 : 0 );
}
return $result;
}
/**
* Check for invalid characters
*
* @param string $text text to be ckecked
* @return bool returns true when invalid characters have been found
*
* @author Ryan Briones <ryanbriones@webxdesign.org>
*
*/
function checkInvalid($text)
{
return preg_match( "/[^0-9A-Z\-*+\$%\/. ]/", $text );
}
}
?>
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