BCGupcext2.barcode.php
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<?php
/**
*--------------------------------------------------------------------
*
* Sub-Class - UPC Supplemental Barcode 2 digits
*
* Working with UPC-A, UPC-E, EAN-13, EAN-8
* This includes 2 digits (normaly for publications)
* Must be placed next to UPC or EAN Code
*
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGParseException.php');
include_once('BCGBarcode1D.php');
include_once('BCGLabel.php');
class BCGupcext2 extends BCGBarcode1D {
protected $codeParity = array();
/**
* Constructor.
*/
public function __construct() {
parent::__construct();
$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
$this->code = array(
'2100', /* 0 */
'1110', /* 1 */
'1011', /* 2 */
'0300', /* 3 */
'0021', /* 4 */
'0120', /* 5 */
'0003', /* 6 */
'0201', /* 7 */
'0102', /* 8 */
'2001' /* 9 */
);
// Parity, 0=Odd, 1=Even. Depending on ?%4
$this->codeParity = array(
array(0, 0), /* 0 */
array(0, 1), /* 1 */
array(1, 0), /* 2 */
array(1, 1) /* 3 */
);
}
/**
* Draws the barcode.
*
* @param resource $im
*/
public function draw($im) {
// Starting Code
$this->drawChar($im, '001', true);
// Code
for ($i = 0; $i < 2; $i++) {
$this->drawChar($im, self::inverse($this->findCode($this->text[$i]), $this->codeParity[intval($this->text) % 4][$i]), false);
if ($i === 0) {
$this->DrawChar($im, '00', false); // Inter-char
}
}
$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
}
/**
* Returns the maximal size of a barcode.
*
* @param int $w
* @param int $h
* @return int[]
*/
public function getDimension($w, $h) {
$startlength = 4;
$textlength = 2 * 7;
$intercharlength = 2;
$w += $startlength + $textlength + $intercharlength;
$h += $this->thickness;
return parent::getDimension($w, $h);
}
/**
* Adds the default label.
*/
protected function addDefaultLabel() {
parent::addDefaultLabel();
if ($this->defaultLabel !== null) {
$this->defaultLabel->setPosition(BCGLabel::POSITION_TOP);
}
}
/**
* Validates the input.
*/
protected function validate() {
$c = strlen($this->text);
if ($c === 0) {
throw new BCGParseException('upcext2', 'No data has been entered.');
}
// Checking if all chars are allowed
for ($i = 0; $i < $c; $i++) {
if (array_search($this->text[$i], $this->keys) === false) {
throw new BCGParseException('upcext2', 'The character \'' . $this->text[$i] . '\' is not allowed.');
}
}
// Must contain 2 digits
if ($c !== 2) {
throw new BCGParseException('upcext2', 'Must contain 2 digits.');
}
parent::validate();
}
/**
* Inverses the string when the $inverse parameter is equal to 1.
*
* @param string $text
* @param int $inverse
* @return string
*/
private static function inverse($text, $inverse = 1) {
if ($inverse === 1) {
$text = strrev($text);
}
return $text;
}
}
?>