324 lines
10 KiB
PHP
324 lines
10 KiB
PHP
<?php
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/**
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*--------------------------------------------------------------------
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*
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* Sub-Class - EAN-13
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*
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* EAN-13 contains
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* - 2 system digits (1 not displayed but coded with parity)
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* - 5 manufacturer code digits
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* - 5 product digits
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* - 1 checksum digit
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*
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* The checksum is always displayed.
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*
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*--------------------------------------------------------------------
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* @author Akhtar Khan <er.akhtarkhan@gmail.com>
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* @link http://www.codeitnow.in
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* @package https://github.com/codeitnowin/barcode-generator
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*/
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namespace CodeItNow\BarcodeBundle\Generator;
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use CodeItNow\BarcodeBundle\Generator\CINParseException;
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use CodeItNow\BarcodeBundle\Generator\CINBarcode;
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use CodeItNow\BarcodeBundle\Generator\CINBarcode1D;
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use CodeItNow\BarcodeBundle\Generator\CINLabel;
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class CINean13 extends CINBarcode1D {
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protected $codeParity = array();
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protected $labelLeft = null;
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protected $labelCenter1 = null;
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protected $labelCenter2 = null;
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protected $alignLabel;
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/**
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* Constructor.
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*/
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public function __construct() {
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parent::__construct();
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$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
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// Left-Hand Odd Parity starting with a space
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// Left-Hand Even Parity is the inverse (0=0012) starting with a space
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// Right-Hand is the same of Left-Hand starting with a bar
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$this->code = array(
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'2100', /* 0 */
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'1110', /* 1 */
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'1011', /* 2 */
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'0300', /* 3 */
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'0021', /* 4 */
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'0120', /* 5 */
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'0003', /* 6 */
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'0201', /* 7 */
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'0102', /* 8 */
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'2001' /* 9 */
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);
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// Parity, 0=Odd, 1=Even for manufacturer code. Depending on 1st System Digit
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$this->codeParity = array(
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array(0, 0, 0, 0, 0), /* 0 */
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array(0, 1, 0, 1, 1), /* 1 */
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array(0, 1, 1, 0, 1), /* 2 */
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array(0, 1, 1, 1, 0), /* 3 */
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array(1, 0, 0, 1, 1), /* 4 */
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array(1, 1, 0, 0, 1), /* 5 */
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array(1, 1, 1, 0, 0), /* 6 */
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array(1, 0, 1, 0, 1), /* 7 */
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array(1, 0, 1, 1, 0), /* 8 */
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array(1, 1, 0, 1, 0) /* 9 */
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);
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$this->alignDefaultLabel(true);
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}
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public function alignDefaultLabel($align) {
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$this->alignLabel = (bool)$align;
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}
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/**
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* Draws the barcode.
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*
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* @param resource $im
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*/
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public function draw($im) {
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$this->drawBars($im);
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$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
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if ($this->isDefaultEanLabelEnabled()) {
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$dimension = $this->labelCenter1->getDimension();
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$this->drawExtendedBars($im, $dimension[1] - 2);
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}
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}
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/**
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* Returns the maximal size of a barcode.
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*
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* @param int $w
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* @param int $h
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* @return int[]
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*/
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public function getDimension($w, $h) {
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$startlength = 3;
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$centerlength = 5;
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$textlength = 12 * 7;
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$endlength = 3;
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$w += $startlength + $centerlength + $textlength + $endlength;
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$h += $this->thickness;
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return parent::getDimension($w, $h);
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}
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/**
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* Adds the default label.
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*/
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protected function addDefaultLabel() {
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if ($this->isDefaultEanLabelEnabled()) {
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$this->processChecksum();
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$label = $this->getLabel();
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$font = $this->font;
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$this->labelLeft = new CINLabel(substr($label, 0, 1), $font, CINLabel::POSITION_LEFT, CINLabel::ALIGN_BOTTOM);
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$this->labelLeft->setSpacing(4 * $this->scale);
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$this->labelCenter1 = new CINLabel(substr($label, 1, 6), $font, CINLabel::POSITION_BOTTOM, CINLabel::ALIGN_LEFT);
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$labelCenter1Dimension = $this->labelCenter1->getDimension();
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$this->labelCenter1->setOffset(($this->scale * 44 - $labelCenter1Dimension[0]) / 2 + $this->scale * 2);
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$this->labelCenter2 = new CINLabel(substr($label, 7, 5) . $this->keys[$this->checksumValue], $font, CINLabel::POSITION_BOTTOM, CINLabel::ALIGN_LEFT);
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$this->labelCenter2->setOffset(($this->scale * 44 - $labelCenter1Dimension[0]) / 2 + $this->scale * 48);
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if ($this->alignLabel) {
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$labelDimension = $this->labelCenter1->getDimension();
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$this->labelLeft->setOffset($labelDimension[1]);
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} else {
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$labelDimension = $this->labelLeft->getDimension();
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$this->labelLeft->setOffset($labelDimension[1] / 2);
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}
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$this->addLabel($this->labelLeft);
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$this->addLabel($this->labelCenter1);
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$this->addLabel($this->labelCenter2);
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}
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}
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/**
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* Checks if the default ean label is enabled.
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*
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* @return bool
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*/
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protected function isDefaultEanLabelEnabled() {
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$label = $this->getLabel();
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$font = $this->font;
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return $label !== null && $label !== '' && $font !== null && $this->defaultLabel !== null;
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}
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/**
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* Validates the input.
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*/
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protected function validate() {
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$c = strlen($this->text);
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if ($c === 0) {
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throw new CINParseException('ean13', 'No data has been entered.');
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}
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$this->checkCharsAllowed();
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$this->checkCorrectLength();
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parent::validate();
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}
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/**
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* Check chars allowed.
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*/
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protected function checkCharsAllowed() {
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// Checking if all chars are allowed
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$c = strlen($this->text);
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for ($i = 0; $i < $c; $i++) {
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if (array_search($this->text[$i], $this->keys) === false) {
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throw new CINParseException('ean13', 'The character \'' . $this->text[$i] . '\' is not allowed.');
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}
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}
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}
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/**
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* Check correct length.
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*/
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protected function checkCorrectLength() {
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// If we have 13 chars, just flush the last one without throwing anything
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$c = strlen($this->text);
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if ($c === 13) {
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$this->text = substr($this->text, 0, 12);
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} elseif ($c !== 12) {
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throw new CINParseException('ean13', 'Must contain 12 digits, the 13th digit is automatically added.');
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}
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}
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/**
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* Overloaded method to calculate checksum.
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*/
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protected function calculateChecksum() {
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// Calculating Checksum
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// Consider the right-most digit of the message to be in an "odd" position,
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// and assign odd/even to each character moving from right to left
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// Odd Position = 3, Even Position = 1
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// Multiply it by the number
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// Add all of that and do 10-(?mod10)
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$odd = true;
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$this->checksumValue = 0;
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$c = strlen($this->text);
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for ($i = $c; $i > 0; $i--) {
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if ($odd === true) {
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$multiplier = 3;
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$odd = false;
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} else {
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$multiplier = 1;
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$odd = true;
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}
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if (!isset($this->keys[$this->text[$i - 1]])) {
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return;
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}
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$this->checksumValue += $this->keys[$this->text[$i - 1]] * $multiplier;
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}
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$this->checksumValue = (10 - $this->checksumValue % 10) % 10;
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}
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/**
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* Overloaded method to display the checksum.
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*/
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protected function processChecksum() {
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if ($this->checksumValue === false) { // Calculate the checksum only once
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$this->calculateChecksum();
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}
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if ($this->checksumValue !== false) {
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return $this->keys[$this->checksumValue];
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}
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return false;
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}
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/**
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* Draws the bars
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*
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* @param resource $im
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*/
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protected function drawBars($im) {
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// Checksum
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$this->calculateChecksum();
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$temp_text = $this->text . $this->keys[$this->checksumValue];
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// Starting Code
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$this->drawChar($im, '000', true);
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// Draw Second Code
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$this->drawChar($im, $this->findCode($temp_text[1]), false);
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// Draw Manufacturer Code
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for ($i = 0; $i < 5; $i++) {
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$this->drawChar($im, self::inverse($this->findCode($temp_text[$i + 2]), $this->codeParity[(int)$temp_text[0]][$i]), false);
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}
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// Draw Center Guard Bar
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$this->drawChar($im, '00000', false);
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// Draw Product Code
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for ($i = 7; $i < 13; $i++) {
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$this->drawChar($im, $this->findCode($temp_text[$i]), true);
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}
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// Draw Right Guard Bar
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$this->drawChar($im, '000', true);
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}
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/**
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* Draws the extended bars on the image.
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*
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* @param resource $im
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* @param int $plus
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*/
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protected function drawExtendedBars($im, $plus) {
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$rememberX = $this->positionX;
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$rememberH = $this->thickness;
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// We increase the bars
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$this->thickness = $this->thickness + intval($plus / $this->scale);
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$this->positionX = 0;
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$this->drawSingleBar($im, CINBarcode::COLOR_FG);
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$this->positionX += 2;
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$this->drawSingleBar($im, CINBarcode::COLOR_FG);
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// Center Guard Bar
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$this->positionX += 44;
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$this->drawSingleBar($im, CINBarcode::COLOR_FG);
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$this->positionX += 2;
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$this->drawSingleBar($im, CINBarcode::COLOR_FG);
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// Last Bars
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$this->positionX += 44;
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$this->drawSingleBar($im, CINBarcode::COLOR_FG);
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$this->positionX += 2;
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$this->drawSingleBar($im, CINBarcode::COLOR_FG);
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$this->positionX = $rememberX;
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$this->thickness = $rememberH;
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}
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/**
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* Inverses the string when the $inverse parameter is equal to 1.
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*
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* @param string $text
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* @param int $inverse
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* @return string
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*/
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private static function inverse($text, $inverse = 1) {
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if ($inverse === 1) {
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$text = strrev($text);
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}
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return $text;
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}
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}
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?>
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