forked from pear/Image_Barcode2
/
postnet.php
198 lines (170 loc) · 5.15 KB
/
postnet.php
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<?php
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/**
* Image_Barcode2_postnet class
*
* Renders PostNet barcodes
*
* PHP versions 5
*
* 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_Barcode2
* @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_Barcode2
*/
/*
* 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/Barcode2/Driver.php';
require_once 'Image/Barcode2/Common.php';
require_once 'Image/Barcode2/Exception.php';
/**
* Image_Barcode2_postnet class
*
* Package which provides a method to create PostNet barcode using GD library.
*
* @category Image
* @package Image_Barcode2
* @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 Release: @package_version@
* @link http://pear.php.net/package/Image_Barcode2
*/
class Image_Barcode2_postnet extends Image_Barcode2_Common implements Image_Barcode2_Driver, Image_Barcode2_DualHeight
{
/**
* Bar short height
*
* @var integer
*/
var $_barshortheight = 7;
/**
* Bar tall height
*
* @var integer
*/
var $_bartallheight = 15;
/**
* 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'
);
/**
* Class constructor
*
* @param Image_Barcode2_Writer $writer Library to use.
*/
public function __construct(Image_Barcode2_Writer $writer)
{
parent::__construct($writer);
$this->setBarcodeWidth(2);
}
/**
* Validate barcode
*
* @throws Image_Barcode2_Exception
*/
public function validate()
{
// Check barcode for invalid characters
if (!preg_match('/[0-9]/', $this->getBarcode())) {
throw new Image_Barcode2_Exception('Invalid barcode');
}
}
/**
* Draws a PostNet image barcode
*
* @return image The corresponding Interleaved 2 of 5 image barcode
*
* @access public
*
* @author Josef "Jeff" Sipek <jeffpc@optonline.net>
* @since Image_Barcode2 0.3
*/
public function draw()
{
$text = $this->getBarcode();
// Calculate the barcode width
$barcodewidth = (strlen($text)) * 2 * 5 * $this->getBarcodeWidth()
+ $this->getBarcodeWidth() * 3;
// Create the image
$img = $this->getWriter()->imagecreate($barcodewidth, $this->_bartallheight);
// Alocate the black and white colors
$black = $this->getWriter()->imagecolorallocate($img, 0, 0, 0);
$white = $this->getWriter()->imagecolorallocate($img, 255, 255, 255);
// Fill image with white color
$this->getWriter()->imagefill($img, 0, 0, $white);
// Initiate x position
$xpos = 0;
// Draws the leader
$this->getWriter()->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$this->_bartallheight,
$black
);
$xpos += 2 * $this->getBarcodeWidth();
// Draw $text contents
for ($idx = 0, $all = strlen($text); $idx < $all; $idx++) {
$char = substr($text, $idx, 1);
for ($baridx = 0; $baridx < 5; $baridx++) {
$elementheight = $this->_barshortheight;
if (substr($this->_coding_map[$char], $baridx, 1)) {
$elementheight = 0;
}
$this->getWriter()->imagefilledrectangle(
$img,
$xpos,
$elementheight,
$xpos + $this->getBarcodeWidth() - 1,
$this->_bartallheight,
$black
);
$xpos += 2 * $this->getBarcodeWidth();
}
}
// Draws the trailer
$this->getWriter()->imagefilledrectangle(
$img,
$xpos,
0,
$xpos + $this->getBarcodeWidth() - 1,
$this->_bartallheight,
$black
);
return $img;
}
} // class
?>