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BCGean13.barcode.php
<?php /** *-------------------------------------------------------------------- * * Sub-Class - EAN-13 * * EAN-13 contains * - 2 system digits (1 not displayed but coded with parity) * - 5 manufacturer code digits * - 5 product digits * - 1 checksum digit * * The checksum is always displayed. * *-------------------------------------------------------------------- * Copyright (C) Jean-Sebastien Goupil * http://www.barcodephp.com */ include_once('BCGParseException.php'); include_once('BCGBarcode1D.php'); class BCGean13 extends BCGBarcode1D { protected $codeParity = array(); protected $labelLeft = null; protected $labelCenter1 = null; protected $labelCenter2 = null; protected $alignLabel; /** * Constructor. */ public function __construct() { parent::__construct(); $this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9'); // Left-Hand Odd Parity starting with a space // Left-Hand Even Parity is the inverse (0=0012) starting with a space // Right-Hand is the same of Left-Hand starting with a bar $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 for manufacturer code. Depending on 1st System Digit $this->codeParity = array( array(0, 0, 0, 0, 0), /* 0 */ array(0, 1, 0, 1, 1), /* 1 */ array(0, 1, 1, 0, 1), /* 2 */ array(0, 1, 1, 1, 0), /* 3 */ array(1, 0, 0, 1, 1), /* 4 */ array(1, 1, 0, 0, 1), /* 5 */ array(1, 1, 1, 0, 0), /* 6 */ array(1, 0, 1, 0, 1), /* 7 */ array(1, 0, 1, 1, 0), /* 8 */ array(1, 1, 0, 1, 0) /* 9 */ ); $this->alignDefaultLabel(true); } public function alignDefaultLabel($align) { $this->alignLabel = (bool)$align; } /** * Draws the barcode. * * @param resource $im */ public function draw($im) { $this->drawBars($im); $this->drawText($im, 0, 0, $this->positionX, $this->thickness); if ($this->isDefaultEanLabelEnabled()) { $dimension = $this->labelCenter1->getDimension(); $this->drawExtendedBars($im, $dimension[1] - 2); } } /** * Returns the maximal size of a barcode. * * @param int $w * @param int $h * @return int[] */ public function getDimension($w, $h) { $startlength = 3; $centerlength = 5; $textlength = 12 * 7; $endlength = 3; $w += $startlength + $centerlength + $textlength + $endlength; $h += $this->thickness; return parent::getDimension($w, $h); } /** * Adds the default label. */ protected function addDefaultLabel() { if ($this->isDefaultEanLabelEnabled()) { $this->processChecksum(); $label = $this->getLabel(); $font = $this->font; $this->labelLeft = new BCGLabel(substr($label, 0, 1), $font, BCGLabel::POSITION_LEFT, BCGLabel::ALIGN_BOTTOM); $this->labelLeft->setSpacing(4 * $this->scale); $this->labelCenter1 = new BCGLabel(substr($label, 1, 6), $font, BCGLabel::POSITION_BOTTOM, BCGLabel::ALIGN_LEFT); $labelCenter1Dimension = $this->labelCenter1->getDimension(); $this->labelCenter1->setOffset(($this->scale * 44 - $labelCenter1Dimension[0]) / 2 + $this->scale * 2); $this->labelCenter2 = new BCGLabel(substr($label, 7, 5) . $this->keys[$this->checksumValue], $font, BCGLabel::POSITION_BOTTOM, BCGLabel::ALIGN_LEFT); $labelCenter2Dimension = $this->labelCenter2->getDimension(); $this->labelCenter2->setOffset(($this->scale * 44 - $labelCenter1Dimension[0]) / 2 + $this->scale * 48); if ($this->alignLabel) { $labelDimension = $this->labelCenter1->getDimension(); $this->labelLeft->setOffset($labelDimension[1]); } else { $labelDimension = $this->labelLeft->getDimension(); $this->labelLeft->setOffset($labelDimension[1] / 2); } $this->addLabel($this->labelLeft); $this->addLabel($this->labelCenter1); $this->addLabel($this->labelCenter2); } } /** * Checks if the default ean label is enabled. * * @return bool */ protected function isDefaultEanLabelEnabled() { $label = $this->getLabel(); $font = $this->font; return $label !== null && $label !== '' && $font !== null && $this->defaultLabel !== null; } /** * Validates the input. */ protected function validate() { $c = strlen($this->text); if ($c === 0) { throw new BCGParseException('ean13', 'No data has been entered.'); } $this->checkCharsAllowed(); $this->checkCorrectLength(); parent::validate(); } /** * Check chars allowed. */ protected function checkCharsAllowed() { // Checking if all chars are allowed $c = strlen($this->text); for ($i = 0; $i < $c; $i++) { if (array_search($this->text[$i], $this->keys) === false) { throw new BCGParseException('ean13', 'The character \'' . $this->text[$i] . '\' is not allowed.'); } } } /** * Check correct length. */ protected function checkCorrectLength() { // If we have 13 chars, just flush the last one without throwing anything $c = strlen($this->text); if ($c === 13) { $this->text = substr($this->text, 0, 12); } elseif ($c !== 12) { throw new BCGParseException('ean13', 'Must contain 12 digits, the 13th digit is automatically added.'); } } /** * Overloaded method to calculate checksum. */ protected function calculateChecksum() { // Calculating Checksum // Consider the right-most digit of the message to be in an "odd" position, // and assign odd/even to each character moving from right to left // Odd Position = 3, Even Position = 1 // Multiply it by the number // Add all of that and do 10-(?mod10) $odd = true; $this->checksumValue = 0; $c = strlen($this->text); for ($i = $c; $i > 0; $i--) { if ($odd === true) { $multiplier = 3; $odd = false; } else { $multiplier = 1; $odd = true; } if (!isset($this->keys[$this->text[$i - 1]])) { return; } $this->checksumValue += $this->keys[$this->text[$i - 1]] * $multiplier; } $this->checksumValue = (10 - $this->checksumValue % 10) % 10; } /** * Overloaded method to display the checksum. */ protected function processChecksum() { if ($this->checksumValue === false) { // Calculate the checksum only once $this->calculateChecksum(); } if ($this->checksumValue !== false) { return $this->keys[$this->checksumValue]; } return false; } /** * Draws the bars * * @param resource $im */ protected function drawBars($im) { // Checksum $this->calculateChecksum(); $temp_text = $this->text . $this->keys[$this->checksumValue]; // Starting Code $this->drawChar($im, '000', true); // Draw Second Code $this->drawChar($im, $this->findCode($temp_text[1]), false); // Draw Manufacturer Code for ($i = 0; $i < 5; $i++) { $this->drawChar($im, self::inverse($this->findCode($temp_text[$i + 2]), $this->codeParity[(int)$temp_text[0]][$i]), false); } // Draw Center Guard Bar $this->drawChar($im, '00000', false); // Draw Product Code for ($i = 7; $i < 13; $i++) { $this->drawChar($im, $this->findCode($temp_text[$i]), true); } // Draw Right Guard Bar $this->drawChar($im, '000', true); } /** * Draws the extended bars on the image. * * @param resource $im * @param int $plus */ protected function drawExtendedBars($im, $plus) { $rememberX = $this->positionX; $rememberH = $this->thickness; // We increase the bars $this->thickness = $this->thickness + intval($plus / $this->scale); $this->positionX = 0; $this->drawSingleBar($im, BCGBarcode::COLOR_FG); $this->positionX += 2; $this->drawSingleBar($im, BCGBarcode::COLOR_FG); // Center Guard Bar $this->positionX += 44; $this->DrawSingleBar($im, BCGBarcode::COLOR_FG); $this->positionX += 2; $this->DrawSingleBar($im, BCGBarcode::COLOR_FG); // Last Bars $this->positionX += 44; $this->DrawSingleBar($im, BCGBarcode::COLOR_FG); $this->positionX += 2; $this->DrawSingleBar($im, BCGBarcode::COLOR_FG); $this->positionX = $rememberX; $this->thickness = $rememberH; } /** * 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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