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<?php
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/**
* Image_Barcode_upca class
*
* Renders UPC-A barcodes
*
* PHP versions 4
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Image
* @package Image_Barcode
* @author Jeffrey K. Brown <jkb@darkfantastic.net>
* @author Didier Fournout <didier.fournout@nyc.fr>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id$
* @link http://pear.php.net/package/Image_Barcode
*/
require_once 'Image/Barcode.php';
/**
* Image_Barcode_upca class
*
* Package which provides a method to create UPC-A barcode using GD library.
*
* Slightly Modified ean13.php to get upca.php I needed a way to print
* UPC-A bar codes on a PHP page. The Image_Barcode class seemed like
* the best way to do it, so I modified ean13 to print in the UPC-A format.
* Checked the bar code tables against some documentation below (no errors)
* and validated the changes with my trusty cue-cat.
* http://www.indiana.edu/~atmat/units/barcodes/bar_t4.htm
*
* @category Image
* @package Image_Barcode
* @author Jeffrey K. Brown <jkb@darkfantastic.net>
* @author Didier Fournout <didier.fournout@nyc.fr>
* @copyright 2005 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Barcode
*/
class Image_Barcode_upca extends Image_Barcode
{
/**
* Barcode type
* @var string
*/
var $_type = 'upca';
/**
* Barcode height
*
* @var integer
*/
var $_barcodeheight = 50;
/**
* Font use to display text
*
* @var integer
*/
var $_font = 2; // gd internal small font
/**
* Bar width
*
* @var integer
*/
var $_barwidth = 1;
/**
* Number set
* @var array
*/
var $_number_set = array(
'0' => array(
'L' => array(0,0,0,1,1,0,1),
'R' => array(1,1,1,0,0,1,0)
),
'1' => array(
'L' => array(0,0,1,1,0,0,1),
'R' => array(1,1,0,0,1,1,0)
),
'2' => array(
'L' => array(0,0,1,0,0,1,1),
'R' => array(1,1,0,1,1,0,0)
),
'3' => array(
'L' => array(0,1,1,1,1,0,1),
'R' => array(1,0,0,0,0,1,0)
),
'4' => array(
'L' => array(0,1,0,0,0,1,1),
'R' => array(1,0,1,1,1,0,0)
),
'5' => array(
'L' => array(0,1,1,0,0,0,1),
'R' => array(1,0,0,1,1,1,0)
),
'6' => array(
'L' => array(0,1,0,1,1,1,1),
'R' => array(1,0,1,0,0,0,0)
),
'7' => array(
'L' => array(0,1,1,1,0,1,1),
'R' => array(1,0,0,0,1,0,0)
),
'8' => array(
'L' => array(0,1,1,0,1,1,1),
'R' => array(1,0,0,1,0,0,0)
),
'9' => array(
'L' => array(0,0,0,1,0,1,1),
'R' => array(1,1,1,0,1,0,0)
)
);
/**
* Draws a UPC-A image barcode
*
* @param string $text A text that should be in the image barcode
* @param string $imgtype The image type that will be generated
*
* @return image The corresponding Interleaved 2 of 5 image barcode
*
* @access public
*
* @author Jeffrey K. Brown <jkb@darkfantastic.net>
* @author Didier Fournout <didier.fournout@nyc.fr>
*
*/
function &draw($text, $imgtype = 'png')
{
$error = false;
if ((is_numeric($text)==false) || (strlen($text)!=12)) {
$barcodewidth= (12 * 7 * $this->_barwidth) + 3 + 5 + 3 + 2 * (imagefontwidth($this->_font)+1);
$error = true;
} else {
// Calculate the barcode width
$barcodewidth = (strlen($text)) * (7 * $this->_barwidth)
+ 3 // left
+ 5 // center
+ 3 // right
+ imagefontwidth($this->_font)+1
+ imagefontwidth($this->_font)+1 // check digit's padding
;
}
$barcodelongheight = (int) (imagefontheight($this->_font)/2)+$this->_barcodeheight;
// Create the image
$img = ImageCreate($barcodewidth, $barcodelongheight+ imagefontheight($this->_font)+1);
// Alocate the black and white colors
$black = ImageColorAllocate($img, 0, 0, 0);
$white = ImageColorAllocate($img, 255, 255, 255);
// Fill image with white color
imagefill($img, 0, 0, $white);
if ($error) {
$imgerror = ImageCreate($barcodewidth, $barcodelongheight+imagefontheight($this->_font)+1);
$red = ImageColorAllocate($imgerror, 255, 0, 0);
$black = ImageColorAllocate($imgerror, 0, 0, 0);
imagefill($imgerror, 0, 0, $red);
imagestring(
$imgerror,
$this->_font,
$barcodewidth / 2 - (10/2 * imagefontwidth($this->_font)),
$this->_barcodeheight / 2,
'Code Error',
$black
);
}
// get the first digit which is the key for creating the first 6 bars
$key = substr($text,0,1);
// Initiate x position
$xpos = 0;
// print first digit
imagestring($img, $this->_font, $xpos, $this->_barcodeheight, $key, $black);
$xpos= imagefontwidth($this->_font) + 1;
// Draws the left guard pattern (bar-space-bar)
// bar
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
$xpos += $this->_barwidth;
// space
$xpos += $this->_barwidth;
// bar
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
$xpos += $this->_barwidth;
foreach ($this->_number_set[$key]['L'] as $bar) {
if ($bar) {
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
}
$xpos += $this->_barwidth;
}
// Draw left $text contents
for ($idx = 1; $idx < 6; $idx ++) {
$value=substr($text,$idx,1);
imagestring ($img, $this->_font, $xpos+1, $this->_barcodeheight, $value, $black);
foreach ($this->_number_set[$value]['L'] as $bar) {
if ($bar) {
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $this->_barcodeheight, $black);
}
$xpos += $this->_barwidth;
}
}
// Draws the center pattern (space-bar-space-bar-space)
// space
$xpos += $this->_barwidth;
// bar
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
$xpos += $this->_barwidth;
// space
$xpos += $this->_barwidth;
// bar
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
$xpos += $this->_barwidth;
// space
$xpos += $this->_barwidth;
// Draw right $text contents
for ($idx = 6; $idx < 11; $idx ++) {
$value=substr($text,$idx,1);
imagestring ($img, $this->_font, $xpos+1, $this->_barcodeheight, $value, $black);
foreach ($this->_number_set[$value]['R'] as $bar) {
if ($bar) {
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $this->_barcodeheight, $black);
}
$xpos += $this->_barwidth;
}
}
$value = substr($text,11,1);
foreach ($this->_number_set[$value]['R'] as $bar) {
if ($bar) {
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
}
$xpos += $this->_barwidth;
}
// Draws the right guard pattern (bar-space-bar)
// bar
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
$xpos += $this->_barwidth;
// space
$xpos += $this->_barwidth;
// bar
imagefilledrectangle($img, $xpos, 0, $xpos + $this->_barwidth - 1, $barcodelongheight, $black);
$xpos += $this->_barwidth;
// Print Check Digit
imagestring($img, $this->_font, $xpos+1, $this->_barcodeheight, $value, $black);
if ($error) {
return $imgerror;
} else {
return $img;
}
} // function create
} // class
?>
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