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barcode.php
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barcode.php
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<?php
/****************************************************************************\
barcode.php - Generate barcodes from a single PHP file. MIT license.
Copyright (c) 2016-2018 Kreative Software.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
\****************************************************************************/
if (realpath(__FILE__) == realpath($_SERVER['SCRIPT_FILENAME'])) {
if (isset($_POST['s']) && isset($_POST['d'])) {
$generator = new barcode_generator();
$format = (isset($_POST['f']) ? $_POST['f'] : 'png');
$generator->output_image($format, $_POST['s'], $_POST['d'], $_POST);
exit(0);
}
if (isset($_GET['s']) && isset($_GET['d'])) {
$generator = new barcode_generator();
$format = (isset($_GET['f']) ? $_GET['f'] : 'png');
$generator->output_image($format, $_GET['s'], $_GET['d'], $_GET);
exit(0);
}
}
class barcode_generator {
public function output_image($format, $symbology, $data, $options) {
switch (strtolower(preg_replace('/[^A-Za-z0-9]/', '', $format))) {
case 'png':
header('Content-Type: image/png');
$image = $this->render_image($symbology, $data, $options);
imagepng($image);
imagedestroy($image);
break;
case 'gif':
header('Content-Type: image/gif');
$image = $this->render_image($symbology, $data, $options);
imagegif($image);
imagedestroy($image);
break;
case 'jpg': case 'jpe': case 'jpeg':
header('Content-Type: image/jpeg');
$image = $this->render_image($symbology, $data, $options);
imagejpeg($image);
imagedestroy($image);
break;
case 'svg':
header('Content-Type: image/svg+xml');
echo $this->render_svg($symbology, $data, $options);
break;
}
}
public function render_image($symbology, $data, $options) {
list($code, $widths, $width, $height, $x, $y, $w, $h) =
$this->encode_and_calculate_size($symbology, $data, $options);
$image = imagecreatetruecolor($width, $height);
imagesavealpha($image, true);
$bgcolor = (isset($options['bc']) ? $options['bc'] : 'FFF');
$bgcolor = $this->allocate_color($image, $bgcolor);
imagefill($image, 0, 0, $bgcolor);
$colors = array(
(isset($options['cs']) ? $options['cs'] : ''),
(isset($options['cm']) ? $options['cm'] : '000'),
(isset($options['c2']) ? $options['c2'] : 'F00'),
(isset($options['c3']) ? $options['c3'] : 'FF0'),
(isset($options['c4']) ? $options['c4'] : '0F0'),
(isset($options['c5']) ? $options['c5'] : '0FF'),
(isset($options['c6']) ? $options['c6'] : '00F'),
(isset($options['c7']) ? $options['c7'] : 'F0F'),
(isset($options['c8']) ? $options['c8'] : 'FFF'),
(isset($options['c9']) ? $options['c9'] : '000'),
);
foreach ($colors as $i => $color) {
$colors[$i] = $this->allocate_color($image, $color);
}
$this->dispatch_render_image(
$image, $code, $x, $y, $w, $h, $colors, $widths, $options
);
return $image;
}
public function render_svg($symbology, $data, $options) {
list($code, $widths, $width, $height, $x, $y, $w, $h) =
$this->encode_and_calculate_size($symbology, $data, $options);
$svg = '<?xml version="1.0"?>';
$svg .= '<svg xmlns="http://www.w3.org/2000/svg" version="1.1"';
$svg .= ' width="' . $width . '" height="' . $height . '"';
$svg .= ' viewBox="0 0 ' . $width . ' ' . $height . '"><g>';
$bgcolor = (isset($options['bc']) ? $options['bc'] : 'white');
if ($bgcolor) {
$svg .= '<rect x="0" y="0"';
$svg .= ' width="' . $width . '" height="' . $height . '"';
$svg .= ' fill="' . htmlspecialchars($bgcolor) . '"/>';
}
$colors = array(
(isset($options['cs']) ? $options['cs'] : ''),
(isset($options['cm']) ? $options['cm'] : 'black'),
(isset($options['c2']) ? $options['c2'] : '#FF0000'),
(isset($options['c3']) ? $options['c3'] : '#FFFF00'),
(isset($options['c4']) ? $options['c4'] : '#00FF00'),
(isset($options['c5']) ? $options['c5'] : '#00FFFF'),
(isset($options['c6']) ? $options['c6'] : '#0000FF'),
(isset($options['c7']) ? $options['c7'] : '#FF00FF'),
(isset($options['c8']) ? $options['c8'] : 'white'),
(isset($options['c9']) ? $options['c9'] : 'black'),
);
$svg .= $this->dispatch_render_svg(
$code, $x, $y, $w, $h, $colors, $widths, $options
);
$svg .= '</g></svg>';
return $svg;
}
/* - - - - INTERNAL FUNCTIONS - - - - */
private function encode_and_calculate_size($symbology, $data, $options) {
$code = $this->dispatch_encode($symbology, $data, $options);
$widths = array(
(isset($options['wq']) ? (int)$options['wq'] : 1),
(isset($options['wm']) ? (int)$options['wm'] : 1),
(isset($options['ww']) ? (int)$options['ww'] : 3),
(isset($options['wn']) ? (int)$options['wn'] : 1),
(isset($options['w4']) ? (int)$options['w4'] : 1),
(isset($options['w5']) ? (int)$options['w5'] : 1),
(isset($options['w6']) ? (int)$options['w6'] : 1),
(isset($options['w7']) ? (int)$options['w7'] : 1),
(isset($options['w8']) ? (int)$options['w8'] : 1),
(isset($options['w9']) ? (int)$options['w9'] : 1),
);
$size = $this->dispatch_calculate_size($code, $widths, $options);
$dscale = ($code && isset($code['g']) && $code['g'] == 'm') ? 4 : 1;
$scale = (isset($options['sf']) ? (float)$options['sf'] : $dscale);
$scalex = (isset($options['sx']) ? (float)$options['sx'] : $scale);
$scaley = (isset($options['sy']) ? (float)$options['sy'] : $scale);
$dpadding = ($code && isset($code['g']) && $code['g'] == 'm') ? 0 : 10;
$padding = (isset($options['p']) ? (int)$options['p'] : $dpadding);
$vert = (isset($options['pv']) ? (int)$options['pv'] : $padding);
$horiz = (isset($options['ph']) ? (int)$options['ph'] : $padding);
$top = (isset($options['pt']) ? (int)$options['pt'] : $vert);
$left = (isset($options['pl']) ? (int)$options['pl'] : $horiz);
$right = (isset($options['pr']) ? (int)$options['pr'] : $horiz);
$bottom = (isset($options['pb']) ? (int)$options['pb'] : $vert);
$dwidth = ceil($size[0] * $scalex) + $left + $right;
$dheight = ceil($size[1] * $scaley) + $top + $bottom;
$iwidth = (isset($options['w']) ? (int)$options['w'] : $dwidth);
$iheight = (isset($options['h']) ? (int)$options['h'] : $dheight);
$swidth = $iwidth - $left - $right;
$sheight = $iheight - $top - $bottom;
return array(
$code, $widths, $iwidth, $iheight,
$left, $top, $swidth, $sheight
);
}
private function allocate_color($image, $color) {
$color = preg_replace('/[^0-9A-Fa-f]/', '', $color);
switch (strlen($color)) {
case 1:
$v = hexdec($color) * 17;
return imagecolorallocate($image, $v, $v, $v);
case 2:
$v = hexdec($color);
return imagecolorallocate($image, $v, $v, $v);
case 3:
$r = hexdec(substr($color, 0, 1)) * 17;
$g = hexdec(substr($color, 1, 1)) * 17;
$b = hexdec(substr($color, 2, 1)) * 17;
return imagecolorallocate($image, $r, $g, $b);
case 4:
$a = hexdec(substr($color, 0, 1)) * 17;
$r = hexdec(substr($color, 1, 1)) * 17;
$g = hexdec(substr($color, 2, 1)) * 17;
$b = hexdec(substr($color, 3, 1)) * 17;
$a = round((255 - $a) * 127 / 255);
return imagecolorallocatealpha($image, $r, $g, $b, $a);
case 6:
$r = hexdec(substr($color, 0, 2));
$g = hexdec(substr($color, 2, 2));
$b = hexdec(substr($color, 4, 2));
return imagecolorallocate($image, $r, $g, $b);
case 8:
$a = hexdec(substr($color, 0, 2));
$r = hexdec(substr($color, 2, 2));
$g = hexdec(substr($color, 4, 2));
$b = hexdec(substr($color, 6, 2));
$a = round((255 - $a) * 127 / 255);
return imagecolorallocatealpha($image, $r, $g, $b, $a);
default:
return imagecolorallocatealpha($image, 0, 0, 0, 127);
}
}
/* - - - - DISPATCH - - - - */
private function dispatch_encode($symbology, $data, $options) {
switch (strtolower(preg_replace('/[^A-Za-z0-9]/', '', $symbology))) {
case 'upca' : return $this->upc_a_encode($data);
case 'upce' : return $this->upc_e_encode($data);
case 'ean13nopad' : return $this->ean_13_encode($data, ' ');
case 'ean13pad' : return $this->ean_13_encode($data, '>');
case 'ean13' : return $this->ean_13_encode($data, '>');
case 'ean8' : return $this->ean_8_encode($data);
case 'code39' : return $this->code_39_encode($data);
case 'code39ascii': return $this->code_39_ascii_encode($data);
case 'code93' : return $this->code_93_encode($data);
case 'code93ascii': return $this->code_93_ascii_encode($data);
case 'code128' : return $this->code_128_encode($data, 0,false);
case 'code128a' : return $this->code_128_encode($data, 1,false);
case 'code128b' : return $this->code_128_encode($data, 2,false);
case 'code128c' : return $this->code_128_encode($data, 3,false);
case 'code128ac' : return $this->code_128_encode($data,-1,false);
case 'code128bc' : return $this->code_128_encode($data,-2,false);
case 'ean128' : return $this->code_128_encode($data, 0, true);
case 'ean128a' : return $this->code_128_encode($data, 1, true);
case 'ean128b' : return $this->code_128_encode($data, 2, true);
case 'ean128c' : return $this->code_128_encode($data, 3, true);
case 'ean128ac' : return $this->code_128_encode($data,-1, true);
case 'ean128bc' : return $this->code_128_encode($data,-2, true);
case 'codabar' : return $this->codabar_encode($data);
case 'itf' : return $this->itf_encode($data);
case 'itf14' : return $this->itf_encode($data);
case 'qr' : return $this->qr_encode($data, 0);
case 'qrl' : return $this->qr_encode($data, 0);
case 'qrm' : return $this->qr_encode($data, 1);
case 'qrq' : return $this->qr_encode($data, 2);
case 'qrh' : return $this->qr_encode($data, 3);
case 'dmtx' : return $this->dmtx_encode($data,false,false);
case 'dmtxs' : return $this->dmtx_encode($data,false,false);
case 'dmtxr' : return $this->dmtx_encode($data, true,false);
case 'gs1dmtx' : return $this->dmtx_encode($data,false, true);
case 'gs1dmtxs' : return $this->dmtx_encode($data,false, true);
case 'gs1dmtxr' : return $this->dmtx_encode($data, true, true);
}
return null;
}
private function dispatch_calculate_size($code, $widths, $options) {
if ($code && isset($code['g']) && $code['g']) {
switch ($code['g']) {
case 'l':
return $this->linear_calculate_size($code, $widths);
case 'm':
return $this->matrix_calculate_size($code, $widths);
}
}
return array(0, 0);
}
private function dispatch_render_image(
$image, $code, $x, $y, $w, $h, $colors, $widths, $options
) {
if ($code && isset($code['g']) && $code['g']) {
switch ($code['g']) {
case 'l':
$this->linear_render_image(
$image, $code, $x, $y, $w, $h,
$colors, $widths, $options
);
break;
case 'm':
$this->matrix_render_image(
$image, $code, $x, $y, $w, $h,
$colors, $widths, $options
);
break;
}
}
}
private function dispatch_render_svg(
$code, $x, $y, $w, $h, $colors, $widths, $options
) {
if ($code && isset($code['g']) && $code['g']) {
switch ($code['g']) {
case 'l':
return $this->linear_render_svg(
$code, $x, $y, $w, $h,
$colors, $widths, $options
);
case 'm':
return $this->matrix_render_svg(
$code, $x, $y, $w, $h,
$colors, $widths, $options
);
}
}
return '';
}
/* - - - - LINEAR BARCODE RENDERER - - - - */
private function linear_calculate_size($code, $widths) {
$width = 0;
foreach ($code['b'] as $block) {
foreach ($block['m'] as $module) {
$width += $module[1] * $widths[$module[2]];
}
}
return array($width, 80);
}
private function linear_render_image(
$image, $code, $x, $y, $w, $h, $colors, $widths, $options
) {
$textheight = (isset($options['th']) ? (int)$options['th'] : 10);
$textsize = (isset($options['ts']) ? (int)$options['ts'] : 1);
$textcolor = (isset($options['tc']) ? $options['tc'] : '000');
$textcolor = $this->allocate_color($image, $textcolor);
$width = 0;
foreach ($code['b'] as $block) {
foreach ($block['m'] as $module) {
$width += $module[1] * $widths[$module[2]];
}
}
if ($width) {
$scale = $w / $width;
$scale = (($scale > 1) ? floor($scale) : 1);
$x = floor($x + ($w - $width * $scale) / 2);
} else {
$scale = 1;
$x = floor($x + $w / 2);
}
foreach ($code['b'] as $block) {
if (isset($block['l'])) {
$label = $block['l'][0];
$ly = (isset($block['l'][1]) ? (float)$block['l'][1] : 1);
$lx = (isset($block['l'][2]) ? (float)$block['l'][2] : 0.5);
$my = round($y + min($h, $h + ($ly - 1) * $textheight));
$ly = ($y + $h + $ly * $textheight);
$ly = round($ly - imagefontheight($textsize));
} else {
$label = null;
$my = $y + $h;
}
$mx = $x;
foreach ($block['m'] as $module) {
$mc = $colors[$module[0]];
$mw = $mx + $module[1] * $widths[$module[2]] * $scale;
imagefilledrectangle($image, $mx, $y, $mw - 1, $my - 1, $mc);
$mx = $mw;
}
if (!is_null($label)) {
$lx = ($x + ($mx - $x) * $lx);
$lw = imagefontwidth($textsize) * strlen($label);
$lx = round($lx - $lw / 2);
imagestring($image, $textsize, $lx, $ly, $label, $textcolor);
}
$x = $mx;
}
}
private function linear_render_svg(
$code, $x, $y, $w, $h, $colors, $widths, $options
) {
$textheight = (isset($options['th']) ? (int)$options['th'] : 10);
$textfont = (isset($options['tf']) ? $options['tf'] : 'monospace');
$textsize = (isset($options['ts']) ? (int)$options['ts'] : 10);
$textcolor = (isset($options['tc']) ? $options['tc'] : 'black');
$width = 0;
foreach ($code['b'] as $block) {
foreach ($block['m'] as $module) {
$width += $module[1] * $widths[$module[2]];
}
}
if ($width) {
$scale = $w / $width;
if ($scale > 1) {
$scale = floor($scale);
$x = floor($x + ($w - $width * $scale) / 2);
}
} else {
$scale = 1;
$x = floor($x + $w / 2);
}
$tx = 'translate(' . $x . ' ' . $y . ')';
if ($scale != 1) $tx .= ' scale(' . $scale . ' 1)';
$svg = '<g transform="' . htmlspecialchars($tx) . '">';
$x = 0;
foreach ($code['b'] as $block) {
if (isset($block['l'])) {
$label = $block['l'][0];
$ly = (isset($block['l'][1]) ? (float)$block['l'][1] : 1);
$lx = (isset($block['l'][2]) ? (float)$block['l'][2] : 0.5);
$mh = min($h, $h + ($ly - 1) * $textheight);
$ly = $h + $ly * $textheight;
} else {
$label = null;
$mh = $h;
}
$svg .= '<g>';
$mx = $x;
foreach ($block['m'] as $module) {
$mc = htmlspecialchars($colors[$module[0]]);
$mw = $module[1] * $widths[$module[2]];
if ($mc) {
$svg .= '<rect';
$svg .= ' x="' . $mx . '" y="0"';
$svg .= ' width="' . $mw . '"';
$svg .= ' height="' . $mh . '"';
$svg .= ' fill="' . $mc . '"/>';
}
$mx += $mw;
}
if (!is_null($label)) {
$lx = ($x + ($mx - $x) * $lx);
$svg .= '<text';
$svg .= ' x="' . $lx . '" y="' . $ly . '"';
$svg .= ' text-anchor="middle"';
$svg .= ' font-family="'.htmlspecialchars($textfont).'"';
$svg .= ' font-size="'.htmlspecialchars($textsize).'"';
$svg .= ' fill="'.htmlspecialchars($textcolor).'">';
$svg .= htmlspecialchars($label);
$svg .= '</text>';
}
$svg .= '</g>';
$x = $mx;
}
return $svg . '</g>';
}
/* - - - - MATRIX BARCODE RENDERER - - - - */
private function matrix_calculate_size($code, $widths) {
$width = (
$code['q'][3] * $widths[0] +
$code['s'][0] * $widths[1] +
$code['q'][1] * $widths[0]
);
$height = (
$code['q'][0] * $widths[0] +
$code['s'][1] * $widths[1] +
$code['q'][2] * $widths[0]
);
return array($width, $height);
}
private function matrix_render_image(
$image, $code, $x, $y, $w, $h, $colors, $widths, $options
) {
$shape = (isset($options['ms']) ? strtolower($options['ms']) : '');
$density = (isset($options['md']) ? (float)$options['md'] : 1);
list($width, $height) = $this->matrix_calculate_size($code, $widths);
if ($width && $height) {
$scale = min($w / $width, $h / $height);
$scale = (($scale > 1) ? floor($scale) : 1);
$x = floor($x + ($w - $width * $scale) / 2);
$y = floor($y + ($h - $height * $scale) / 2);
} else {
$scale = 1;
$x = floor($x + $w / 2);
$y = floor($y + $h / 2);
}
$x += $code['q'][3] * $widths[0] * $scale;
$y += $code['q'][0] * $widths[0] * $scale;
$wh = $widths[1] * $scale;
foreach ($code['b'] as $by => $row) {
$y1 = $y + $by * $wh;
foreach ($row as $bx => $color) {
$x1 = $x + $bx * $wh;
$mc = $colors[$color];
$this->matrix_dot_image(
$image, $x1, $y1, $wh, $wh, $mc, $shape, $density
);
}
}
}
private function matrix_render_svg(
$code, $x, $y, $w, $h, $colors, $widths, $options
) {
$shape = (isset($options['ms']) ? strtolower($options['ms']) : '');
$density = (isset($options['md']) ? (float)$options['md'] : 1);
list($width, $height) = $this->matrix_calculate_size($code, $widths);
if ($width && $height) {
$scale = min($w / $width, $h / $height);
if ($scale > 1) $scale = floor($scale);
$x = floor($x + ($w - $width * $scale) / 2);
$y = floor($y + ($h - $height * $scale) / 2);
} else {
$scale = 1;
$x = floor($x + $w / 2);
$y = floor($y + $h / 2);
}
$tx = 'translate(' . $x . ' ' . $y . ')';
if ($scale != 1) $tx .= ' scale(' . $scale . ' ' . $scale . ')';
$svg = '<g transform="' . htmlspecialchars($tx) . '">';
$x = $code['q'][3] * $widths[0];
$y = $code['q'][0] * $widths[0];
$wh = $widths[1];
foreach ($code['b'] as $by => $row) {
$y1 = $y + $by * $wh;
foreach ($row as $bx => $color) {
$x1 = $x + $bx * $wh;
$mc = $colors[$color];
if ($mc) {
$svg .= $this->matrix_dot_svg(
$x1, $y1, $wh, $wh, $mc, $shape, $density
);
}
}
}
return $svg . '</g>';
}
private function matrix_dot_image($image, $x, $y, $w, $h, $mc, $ms, $md) {
switch ($ms) {
default:
$x = floor($x + (1 - $md) * $w / 2);
$y = floor($y + (1 - $md) * $h / 2);
$w = ceil($w * $md);
$h = ceil($h * $md);
imagefilledrectangle($image, $x, $y, $x+$w-1, $y+$h-1, $mc);
break;
case 'r':
$cx = floor($x + $w / 2);
$cy = floor($y + $h / 2);
$dx = ceil($w * $md);
$dy = ceil($h * $md);
imagefilledellipse($image, $cx, $cy, $dx, $dy, $mc);
break;
case 'x':
$x = floor($x + (1 - $md) * $w / 2);
$y = floor($y + (1 - $md) * $h / 2);
$w = ceil($w * $md);
$h = ceil($h * $md);
imageline($image, $x, $y, $x+$w-1, $y+$h-1, $mc);
imageline($image, $x, $y+$h-1, $x+$w-1, $y, $mc);
break;
}
}
private function matrix_dot_svg($x, $y, $w, $h, $mc, $ms, $md) {
switch ($ms) {
default:
$x += (1 - $md) * $w / 2;
$y += (1 - $md) * $h / 2;
$w *= $md;
$h *= $md;
$svg = '<rect x="' . $x . '" y="' . $y . '"';
$svg .= ' width="' . $w . '" height="' . $h . '"';
$svg .= ' fill="' . $mc . '"/>';
return $svg;
case 'r':
$cx = $x + $w / 2;
$cy = $y + $h / 2;
$rx = $w * $md / 2;
$ry = $h * $md / 2;
$svg = '<ellipse cx="' . $cx . '" cy="' . $cy . '"';
$svg .= ' rx="' . $rx . '" ry="' . $ry . '"';
$svg .= ' fill="' . $mc . '"/>';
return $svg;
case 'x':
$x1 = $x + (1 - $md) * $w / 2;
$y1 = $y + (1 - $md) * $h / 2;
$x2 = $x + $w - (1 - $md) * $w / 2;
$y2 = $y + $h - (1 - $md) * $h / 2;
$svg = '<line x1="' . $x1 . '" y1="' . $y1 . '"';
$svg .= ' x2="' . $x2 . '" y2="' . $y2 . '"';
$svg .= ' stroke="' . $mc . '"';
$svg .= ' stroke-width="' . ($md / 5) . '"/>';
$svg .= '<line x1="' . $x1 . '" y1="' . $y2 . '"';
$svg .= ' x2="' . $x2 . '" y2="' . $y1 . '"';
$svg .= ' stroke="' . $mc . '"';
$svg .= ' stroke-width="' . ($md / 5) . '"/>';
return '<g>' . $svg . '</g>';
}
}
/* - - - - UPC FAMILY ENCODER - - - - */
private function upc_a_encode($data) {
$data = $this->upc_a_normalize($data);
$blocks = array();
/* Quiet zone, start, first digit. */
$digit = substr($data, 0, 1);
$blocks[] = array(
'm' => array(array(0, 9, 0)),
'l' => array($digit, 0, 1/3)
);
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
$blocks[] = array(
'm' => array(
array(0, $this->upc_alphabet[$digit][0], 1),
array(1, $this->upc_alphabet[$digit][1], 1),
array(0, $this->upc_alphabet[$digit][2], 1),
array(1, $this->upc_alphabet[$digit][3], 1),
)
);
/* Left zone. */
for ($i = 1; $i < 6; $i++) {
$digit = substr($data, $i, 1);
$blocks[] = array(
'm' => array(
array(0, $this->upc_alphabet[$digit][0], 1),
array(1, $this->upc_alphabet[$digit][1], 1),
array(0, $this->upc_alphabet[$digit][2], 1),
array(1, $this->upc_alphabet[$digit][3], 1),
),
'l' => array($digit, 0.5, (6 - $i) / 6)
);
}
/* Middle. */
$blocks[] = array(
'm' => array(
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
)
);
/* Right zone. */
for ($i = 6; $i < 11; $i++) {
$digit = substr($data, $i, 1);
$blocks[] = array(
'm' => array(
array(1, $this->upc_alphabet[$digit][0], 1),
array(0, $this->upc_alphabet[$digit][1], 1),
array(1, $this->upc_alphabet[$digit][2], 1),
array(0, $this->upc_alphabet[$digit][3], 1),
),
'l' => array($digit, 0.5, (11 - $i) / 6)
);
}
/* Last digit, end, quiet zone. */
$digit = substr($data, 11, 1);
$blocks[] = array(
'm' => array(
array(1, $this->upc_alphabet[$digit][0], 1),
array(0, $this->upc_alphabet[$digit][1], 1),
array(1, $this->upc_alphabet[$digit][2], 1),
array(0, $this->upc_alphabet[$digit][3], 1),
)
);
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
$blocks[] = array(
'm' => array(array(0, 9, 0)),
'l' => array($digit, 0, 2/3)
);
/* Return code. */
return array('g' => 'l', 'b' => $blocks);
}
private function upc_e_encode($data) {
$data = $this->upc_e_normalize($data);
$blocks = array();
/* Quiet zone, start. */
$blocks[] = array(
'm' => array(array(0, 9, 0))
);
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
/* Digits */
$system = substr($data, 0, 1) & 1;
$check = substr($data, 7, 1);
$pbits = $this->upc_parity[$check];
for ($i = 1; $i < 7; $i++) {
$digit = substr($data, $i, 1);
$pbit = $pbits[$i - 1] ^ $system;
$blocks[] = array(
'm' => array(
array(0, $this->upc_alphabet[$digit][$pbit ? 3 : 0], 1),
array(1, $this->upc_alphabet[$digit][$pbit ? 2 : 1], 1),
array(0, $this->upc_alphabet[$digit][$pbit ? 1 : 2], 1),
array(1, $this->upc_alphabet[$digit][$pbit ? 0 : 3], 1),
),
'l' => array($digit, 0.5, (7 - $i) / 7)
);
}
/* End, quiet zone. */
$blocks[] = array(
'm' => array(
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
$blocks[] = array(
'm' => array(array(0, 9, 0))
);
/* Return code. */
return array('g' => 'l', 'b' => $blocks);
}
private function ean_13_encode($data, $pad) {
$data = $this->ean_13_normalize($data);
$blocks = array();
/* Quiet zone, start, first digit (as parity). */
$system = substr($data, 0, 1);
$pbits = (
(int)$system ?
$this->upc_parity[$system] :
array(1, 1, 1, 1, 1, 1)
);
$blocks[] = array(
'm' => array(array(0, 9, 0)),
'l' => array($system, 0.5, 1/3)
);
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
/* Left zone. */
for ($i = 1; $i < 7; $i++) {
$digit = substr($data, $i, 1);
$pbit = $pbits[$i - 1];
$blocks[] = array(
'm' => array(
array(0, $this->upc_alphabet[$digit][$pbit ? 0 : 3], 1),
array(1, $this->upc_alphabet[$digit][$pbit ? 1 : 2], 1),
array(0, $this->upc_alphabet[$digit][$pbit ? 2 : 1], 1),
array(1, $this->upc_alphabet[$digit][$pbit ? 3 : 0], 1),
),
'l' => array($digit, 0.5, (7 - $i) / 7)
);
}
/* Middle. */
$blocks[] = array(
'm' => array(
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
)
);
/* Right zone. */
for ($i = 7; $i < 13; $i++) {
$digit = substr($data, $i, 1);
$blocks[] = array(
'm' => array(
array(1, $this->upc_alphabet[$digit][0], 1),
array(0, $this->upc_alphabet[$digit][1], 1),
array(1, $this->upc_alphabet[$digit][2], 1),
array(0, $this->upc_alphabet[$digit][3], 1),
),
'l' => array($digit, 0.5, (13 - $i) / 7)
);
}
/* End, quiet zone. */
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
$blocks[] = array(
'm' => array(array(0, 9, 0)),
'l' => array($pad, 0.5, 2/3)
);
/* Return code. */
return array('g' => 'l', 'b' => $blocks);
}
private function ean_8_encode($data) {
$data = $this->ean_8_normalize($data);
$blocks = array();
/* Quiet zone, start. */
$blocks[] = array(
'm' => array(array(0, 9, 0)),
'l' => array('<', 0.5, 1/3)
);
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
/* Left zone. */
for ($i = 0; $i < 4; $i++) {
$digit = substr($data, $i, 1);
$blocks[] = array(
'm' => array(
array(0, $this->upc_alphabet[$digit][0], 1),
array(1, $this->upc_alphabet[$digit][1], 1),
array(0, $this->upc_alphabet[$digit][2], 1),
array(1, $this->upc_alphabet[$digit][3], 1),
),
'l' => array($digit, 0.5, (4 - $i) / 5)
);
}
/* Middle. */
$blocks[] = array(
'm' => array(
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
array(0, 1, 1),
)
);
/* Right zone. */
for ($i = 4; $i < 8; $i++) {
$digit = substr($data, $i, 1);
$blocks[] = array(
'm' => array(
array(1, $this->upc_alphabet[$digit][0], 1),
array(0, $this->upc_alphabet[$digit][1], 1),
array(1, $this->upc_alphabet[$digit][2], 1),
array(0, $this->upc_alphabet[$digit][3], 1),
),
'l' => array($digit, 0.5, (8 - $i) / 5)
);
}
/* End, quiet zone. */
$blocks[] = array(
'm' => array(
array(1, 1, 1),
array(0, 1, 1),
array(1, 1, 1),
)
);
$blocks[] = array(
'm' => array(array(0, 9, 0)),
'l' => array('>', 0.5, 2/3)
);
/* Return code. */
return array('g' => 'l', 'b' => $blocks);
}
private function upc_a_normalize($data) {
$data = preg_replace('/[^0-9*]/', '', $data);
/* Set length to 12 digits. */
if (strlen($data) < 5) {
$data = str_repeat('0', 12);
} else if (strlen($data) < 12) {
$system = substr($data, 0, 1);
$edata = substr($data, 1, -2);
$epattern = (int)substr($data, -2, 1);
$check = substr($data, -1);
if ($epattern < 3) {
$left = $system . substr($edata, 0, 2) . $epattern;
$right = substr($edata, 2) . $check;
} else if ($epattern < strlen($edata)) {
$left = $system . substr($edata, 0, $epattern);
$right = substr($edata, $epattern) . $check;
} else {
$left = $system . $edata;
$right = $epattern . $check;
}
$center = str_repeat('0', 12 - strlen($left . $right));
$data = $left . $center . $right;
} else if (strlen($data) > 12) {
$left = substr($data, 0, 6);
$right = substr($data, -6);
$data = $left . $right;
}
/* Replace * with missing or check digit. */
while (($o = strrpos($data, '*')) !== false) {
$checksum = 0;
for ($i = 0; $i < 12; $i++) {
$digit = substr($data, $i, 1);
$checksum += (($i % 2) ? 1 : 3) * $digit;
}
$checksum *= (($o % 2) ? 9 : 3);
$left = substr($data, 0, $o);
$center = substr($checksum, -1);
$right = substr($data, $o + 1);
$data = $left . $center . $right;
}
return $data;
}
private function upc_e_normalize($data) {
$data = preg_replace('/[^0-9*]/', '', $data);
/* If exactly 8 digits, use verbatim even if check digit is wrong. */
if (preg_match(
'/^([01])([0-9][0-9][0-9][0-9][0-9][0-9])([0-9])$/',
$data, $m
)) {
return $data;
}
/* If unknown check digit, use verbatim but calculate check digit. */
if (preg_match(
'/^([01])([0-9][0-9][0-9][0-9][0-9][0-9])([*])$/',
$data, $m
)) {
$data = $this->upc_a_normalize($data);
return $m[1] . $m[2] . substr($data, -1);
}
/* Otherwise normalize to UPC-A and convert back. */
$data = $this->upc_a_normalize($data);
if (preg_match(
'/^([01])([0-9][0-9])([0-2])0000([0-9][0-9][0-9])([0-9])$/',
$data, $m
)) {
return $m[1] . $m[2] . $m[4] . $m[3] . $m[5];
}
if (preg_match(
'/^([01])([0-9][0-9][0-9])00000([0-9][0-9])([0-9])$/',
$data, $m
)) {
return $m[1] . $m[2] . $m[3] . '3' . $m[4];
}
if (preg_match(
'/^([01])([0-9][0-9][0-9][0-9])00000([0-9])([0-9])$/',
$data, $m
)) {
return $m[1] . $m[2] . $m[3] . '4' . $m[4];
}
if (preg_match(
'/^([01])([0-9][0-9][0-9][0-9][0-9])0000([5-9])([0-9])$/',
$data, $m
)) {
return $m[1] . $m[2] . $m[3] . $m[4];
}
return str_repeat('0', 8);
}
private function ean_13_normalize($data) {
$data = preg_replace('/[^0-9*]/', '', $data);
/* Set length to 13 digits. */
if (strlen($data) < 13) {
return '0' . $this->upc_a_normalize($data);
} else if (strlen($data) > 13) {
$left = substr($data, 0, 7);
$right = substr($data, -6);
$data = $left . $right;
}
/* Replace * with missing or check digit. */
while (($o = strrpos($data, '*')) !== false) {
$checksum = 0;
for ($i = 0; $i < 13; $i++) {
$digit = substr($data, $i, 1);
$checksum += (($i % 2) ? 3 : 1) * $digit;
}
$checksum *= (($o % 2) ? 3 : 9);
$left = substr($data, 0, $o);
$center = substr($checksum, -1);
$right = substr($data, $o + 1);
$data = $left . $center . $right;
}
return $data;
}
private function ean_8_normalize($data) {
$data = preg_replace('/[^0-9*]/', '', $data);
/* Set length to 8 digits. */
if (strlen($data) < 8) {
$midpoint = floor(strlen($data) / 2);
$left = substr($data, 0, $midpoint);
$center = str_repeat('0', 8 - strlen($data));
$right = substr($data, $midpoint);
$data = $left . $center . $right;
} else if (strlen($data) > 8) {
$left = substr($data, 0, 4);
$right = substr($data, -4);
$data = $left . $right;
}
/* Replace * with missing or check digit. */
while (($o = strrpos($data, '*')) !== false) {
$checksum = 0;
for ($i = 0; $i < 8; $i++) {
$digit = substr($data, $i, 1);
$checksum += (($i % 2) ? 1 : 3) * $digit;