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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;
- }
- }
- ?>
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