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<?php
/**
* BCGean13.barcode.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.
*
*--------------------------------------------------------------------
* Revision History
* v2.0.1 8 mar 2009 Jean-Sébastien Goupil Fix padding for the barcode
* v2.0.0 23 apr 2008 Jean-Sébastien Goupil New Version Update
* v1.3.0 13 apr 2007 Jean-Sébastien Goupil Move ISBN implementation to isbn.php
* v1.2.3pl1 11 mar 2006 Jean-Sébastien Goupil Correct getMaxWidth if ISBN
* v1.2.3 6 feb 2006 Jean-Sébastien Goupil Using correctly static method
* v1.2.3b 31 dec 2005 Jean-Sébastien Goupil Checksum separated + PHP5.1 compatible
* v1.2.2 23 jul 2005 Jean-Sébastien Goupil Enhance rapidity
* v1.2.1 27 jun 2005 Jean-Sébastien Goupil Font support added
* V1.00 17 jun 2004 Jean-Sebastien Goupil
*--------------------------------------------------------------------
* $Id: BCGean13.barcode.php,v 1.13 2009/03/23 06:48:30 jsgoupil Exp $
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGBarcode1D.php');
class BCGean13 extends BCGBarcode1D {
protected $codeParity = array();
/**
* 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
$this->codeParity = array(
array(0,0,0,0,0), /* 0 */
array(0,1,0,1,1), /* 1 */
array(0,1,1,0,1), /* 2 */
array(0,1,1,1,0), /* 3 */
array(1,0,0,1,1), /* 4 */
array(1,1,0,0,1), /* 5 */
array(1,1,1,0,0), /* 6 */
array(1,0,1,0,1), /* 7 */
array(1,0,1,1,0), /* 8 */
array(1,1,0,1,0) /* 9 */
);
}
public function parse($text) {
parent::parse($text);
$this->setLabelOffset();
}
public function setFont($font) {
parent::setFont($font);
$this->setLabelOffset();
}
public function setLabel($label) {
parent::setLabel($label);
$this->setLabelOffset();
}
public function setOffsetX($offsetX) {
parent::setOffsetX($offsetX);
$this->setLabelOffset();
}
public function setScale($scale) {
parent::setScale($scale);
$this->setLabelOffset();
}
/**
* Draws the barcode
*
* @param resource $im
*/
public function draw(&$im) {
if($this->isCharsAllowed($im)) {
if($this->isLengthCorrect($im)) {
$this->drawBars($im);
$this->drawText($im);
}
}
}
/**
* Returns the maximal size of a barcode
*
* @return int[]
*/
public function getMaxSize() {
$p = parent::getMaxSize();
$startlength = 3 * $this->scale;
$centerlength = 5 * $this->scale;
$textlength = 12 * 7 * $this->scale;
$endlength = 3 * $this->scale;
return array($p[0] + $startlength + $centerlength + $textlength + $endlength, $p[1]);
}
protected function setLabelOffset() {
$label = $this->getLabel();
if(!empty($label)) {
if($this->textfont instanceof BCGFont) {
$f = clone $this->textfont;
$f->setText(substr($label, 0, 1));
$val = ($f->getWidth() + 5) / $this->scale;
if($val > $this->offsetX) {
$this->offsetX = $val;
}
} elseif($this->textfont !== 0) {
$val = (imagefontwidth($this->textfont) + 2) / $this->scale;
if($val > $this->offsetX) {
$this->offsetX = $val;
}
}
}
}
/**
* 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;
}
protected function isCharsAllowed(&$im) {
// 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) {
$this->drawError($im, 'Char \'' . $this->text[$i] . '\' not allowed.');
return false;
}
}
return true;
}
protected function isLengthCorrect(&$im) {
$c = strlen($this->text);
// If we have 13 chars just flush the last one
if($c === 13) {
$this->text = substr($this->text, 0, 12);
return true;
} elseif($c === 12) {
return true;
}
$this->drawError($im, 'Must provide 12 or 13 digits.');
return false;
}
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);
}
/**
* Overloaded method for drawing special label
*
* @param resource $im
*/
protected function drawText($im) {
if($this->label !== BCGBarcode1D::AUTO_LABEL) {
parent::drawText($im);
} elseif($this->label !== '') {
$temp_text = $this->text . $this->keys[$this->checksumValue];
if ($this->textfont instanceof BCGFont) {
$code1 = 0;
$code2 = 0;
$this->textfont->setText($temp_text);
$this->drawExtendedBars($im, $this->textfont->getHeight(), $code1, $code2);
// We need to separate the text, one on the left and one on the right and one starting
$text0 = substr($temp_text, 0, 1);
$text1 = substr($temp_text, 1, 6);
$text2 = substr($temp_text, 7, 6);
$font0 = clone $this->textfont;
$font1 = clone $this->textfont;
$font2 = clone $this->textfont;
$font0->setText($text0);
$font1->setText($text1);
$font2->setText($text2);
$xPosition0 = $this->offsetX * $this->scale - $font0->getWidth() - 4; // -4 is just for beauty
$yPosition0 = $this->thickness * $this->scale + $font0->getHeight() / 2 + $this->offsetY * $this->scale;
$xPosition1 = ($this->scale * 44 - $font1->getWidth()) / 2 + $code1 * $this->scale + $this->offsetX * $this->scale;
$xPosition2 = ($this->scale * 44 - $font1->getWidth()) / 2 + $code2 * $this->scale + $this->offsetX * $this->scale;
$yPosition = $this->thickness * $this->scale + $this->textfont->getHeight() + self::SIZE_SPACING_FONT + $this->offsetY * $this->scale;
$text_color = $this->colorFg->allocate($im);
$font0->draw($im, $text_color, $xPosition0, $yPosition0);
$font1->draw($im, $text_color, $xPosition1, $yPosition);
$font2->draw($im, $text_color, $xPosition2, $yPosition);
} elseif($this->textfont !== 0) {
$code1 = 0;
$code2 = 0;
$this->drawExtendedBars($im, 9, $code1, $code2);
$startPosition = 10;
$xPosition0 = $this->offsetX * $this->scale - imagefontwidth($this->textfont);
$yPosition0 = $this->thickness * $this->scale - imagefontheight($this->textfont) / 2 + $this->offsetY * $this->scale;
$xPosition1 = ($this->scale * 44 - imagefontwidth($this->textfont) * 6) / 2 + $code1 * $this->scale + $this->offsetX * $this->scale;
$xPosition2 = ($this->scale * 44 - imagefontwidth($this->textfont) * 6) / 2 + $code2 * $this->scale + $this->offsetX * $this->scale;
$yPosition = $this->thickness * $this->scale + 1 * $this->scale + $this->offsetY * $this->scale;
$text_color = $this->colorFg->allocate($im);
imagechar($im, $this->textfont, $xPosition0, $yPosition0, $temp_text[0], $text_color);
imagestring($im, $this->textfont, $xPosition1, $yPosition, substr($temp_text, 1, 6), $text_color);
imagestring($im, $this->textfont, $xPosition2, $yPosition, substr($temp_text, 7, 6), $text_color);
}
}
}
private function drawExtendedBars(&$im, $plus, &$code1, &$code2) {
$rememberX = $this->positionX;
$rememberH = $this->thickness;
// We increase the bars
$this->thickness = $this->thickness + ceil($plus / $this->scale);
$this->positionX = 0;
$this->drawSingleBar($im, BCGBarcode::COLOR_FG);
$this->positionX += 2;
$this->drawSingleBar($im, BCGBarcode::COLOR_FG);
$code1 = $this->positionX;
// Center Guard Bar
$this->positionX += 44;
$this->DrawSingleBar($im, BCGBarcode::COLOR_FG);
$this->positionX += 2;
$this->DrawSingleBar($im, BCGBarcode::COLOR_FG);
// Last Bars
$code2 = $this->positionX;
$this->positionX += 44;
$this->DrawSingleBar($im, BCGBarcode::COLOR_FG);
$this->positionX += 2;
$this->DrawSingleBar($im, BCGBarcode::COLOR_FG);
$this->positionX = $rememberX;
$this->thickness = $rememberH;
}
private static function inverse($text, $inverse = 1) {
if($inverse === 1) {
$text = strrev($text);
}
return $text;
}
};
?>
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