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<?php
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/**
* Image_Barcode_postnet class
*
* Renders PostNet barcodes
*
* 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 Josef "Jeff" Sipek <jeffpc@optonline.net>
* @copyright 2005 Josef "Jeff" Sipek
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id$
* @link http://pear.php.net/package/Image_Barcode
*/
/*
* Note:
*
* The generated barcode must fit the following criteria to be useable
* by the USPS scanners:
*
* When printed, the dimensions should be:
*
* tall bar: 1/10 inches = 2.54 mm
* short bar: 1/20 inches = 1.27 mm
* density: 22 bars/inch = 8.66 bars/cm
*/
require_once 'Image/Barcode.php';
/**
* Image_Barcode_postnet class
*
* Package which provides a method to create PostNet barcode using GD library.
*
* @category Image
* @package Image_Barcode
* @author Josef "Jeff" Sipek <jeffpc@optonline.net>
* @copyright 2005 Josef "Jeff" Sipek
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id$
* @link http://pear.php.net/package/Image_Barcode
*/
class Image_Barcode_postnet extends Image_Barcode
{
/**
* Barcode type
* @var string
*/
var $_type = 'postnet';
/**
* Bar short height
*
* @var integer
*/
var $_barshortheight = 7;
/**
* Bar tall height
*
* @var integer
*/
var $_bartallheight = 15;
/**
* Bar width / scaling factor
*
* @var integer
*/
var $_barwidth = 2;
/**
* Coding map
* @var array
*/
var $_coding_map = array(
'0' => '11000',
'1' => '00011',
'2' => '00101',
'3' => '00110',
'4' => '01001',
'5' => '01010',
'6' => '01100',
'7' => '10001',
'8' => '10010',
'9' => '10100'
);
/**
* Draws a PostNet image barcode
*
* @param string $text A text that should be in the image barcode
* @param string $imgtype The image type that will be generated
*
* @return image The corresponding Interleaved 2 of 5 image barcode
*
* @access public
*
* @author Josef "Jeff" Sipek <jeffpc@optonline.net>
* @since Image_Barcode 0.3
*/
function draw($text, $imgtype = 'png')
{
$text = trim($text);
if (!preg_match('/[0-9]/', $text)) {
return;
}
// Calculate the barcode width
$barcodewidth = (strlen($text)) * 2 * 5 * $this->_barwidth + $this->_barwidth*3;
// Create the image
$img = ImageCreate($barcodewidth, $this->_bartallheight);
// Alocate the black and white colors
$black = ImageColorAllocate($img, 0, 0, 0);
$white = ImageColorAllocate($img, 255, 255, 255);
// Fill image with white color
imagefill($img, 0, 0, $white);
// Initiate x position
$xpos = 0;
// Draws the leader
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $this->_bartallheight, $black);
$xpos += 2*$this->_barwidth;
// Draw $text contents
for ($idx = 0; $idx < strlen($text); $idx++) {
$char = substr($text, $idx, 1);
for ($baridx = 0; $baridx < 5; $baridx++) {
$elementheight = (substr($this->_coding_map[$char], $baridx, 1)) ? 0 : $this->_barshortheight;
imagefilledrectangle($img, $xpos, $elementheight, $xpos + $this->_barwidth - 1, $this->_bartallheight, $black);
$xpos += 2*$this->_barwidth;
}
}
// Draws the trailer
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $this->_bartallheight, $black);
$xpos += 2*$this->_barwidth;
return $img;
} // function create
} // class
?>
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