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qrcode.php
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<?php
/****************************************************************************\
qrcode.php - Generate QR Codes. MIT license.
Copyright for portions of this project are held by Kreative Software, 2016-2018.
All other copyright for the project are held by Donald Becker, 2019
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'])) {
$generator = new QRCode($_REQUEST['d'], $_REQUEST);
$generator->output_image();
exit(0);
}
class QRCode {
private $data;
private $options;
public function __construct($data, $options) {
$this->data = $data;
$this->options = $options;
}
public function output_image() {
$image = $this->render_image();
header('Content-Type: image/png');
imagepng($image);
imagedestroy($image);
}
public function render_image() {
list($code, $widths, $width, $height, $x, $y, $w, $h) = $this->encode_and_calculate_size($this->data, $this->options);
$image = imagecreatetruecolor($width, $height);
imagesavealpha($image, true);
$bgcolor = (isset($this->options['bc']) ? $this->options['bc'] : 'FFFFFF');
$bgcolor = $this->allocate_color($image, $bgcolor);
imagefill($image, 0, 0, $bgcolor);
$fgcolor = (isset($this->options['fc']) ? $this->options['fc'] : '000000');
$fgcolor = $this->allocate_color($image, $fgcolor);
$colors = array($bgcolor, $fgcolor);
$density = (isset($this->options['md']) ? (float)$this->options['md'] : 1);
list($width, $height) = $this->calculate_size($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 ? 1 : 0];
$rx = floor($x1 + (1 - $density) * $wh / 2);
$ry = floor($y1 + (1 - $density) * $wh / 2);
$rw = ceil($wh * $density);
$rh = ceil($wh * $density);
imagefilledrectangle($image, $rx, $ry, $rx+$rw-1, $ry+$rh-1, $mc);
}
}
return $image;
}
/* - - - - INTERNAL FUNCTIONS - - - - */
private function encode_and_calculate_size($data, $options) {
$code = $this->dispatch_encode($data, $options);
$widths = array(
(isset($options['wq']) ? (int)$options['wq'] : 1),
(isset($options['wm']) ? (int)$options['wm'] : 1),
);
$size = $this->calculate_size($code, $widths);
$dscale = 4;
$scale = (isset($options['sf']) ? (float)$options['sf'] : $dscale);
$scalex = (isset($options['sx']) ? (float)$options['sx'] : $scale);
$scaley = (isset($options['sy']) ? (float)$options['sy'] : $scale);
$dpadding = 0;
$padding = (isset($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);
$r = hexdec(substr($color, 0, 2));
$g = hexdec(substr($color, 2, 2));
$b = hexdec(substr($color, 4, 2));
return imagecolorallocate($image, $r, $g, $b);
}
/* - - - - DISPATCH - - - - */
private function dispatch_encode($data, $options) {
switch (strtolower(preg_replace('/[^A-Za-z0-9]/', '', $options['s']))) {
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);
default: return $this->qr_encode($data, 0);
}
return null;
}
/* - - - - MATRIX BARCODE RENDERER - - - - */
private function 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, $height);
}
/* - - - - QR ENCODER - - - - */
private function qr_encode($data, $ecl) {
list($mode, $vers, $ec, $data) = $this->qr_encode_data($data, $ecl);
$data = $this->qr_encode_ec($data, $ec, $vers);
list($size, $mtx) = $this->qr_create_matrix($vers, $data);
list($mask, $mtx) = $this->qr_apply_best_mask($mtx, $size);
$mtx = $this->qr_finalize_matrix($mtx, $size, $ecl, $mask, $vers);
return array(
'q' => array(4, 4, 4, 4),
's' => array($size, $size),
'b' => $mtx
);
}
private function qr_encode_data($data, $ecl) {
$mode = $this->qr_detect_mode($data);
$version = $this->qr_detect_version($data, $mode, $ecl);
$version_group = (($version < 10) ? 0 : (($version < 27) ? 1 : 2));
$ec_params = $this->qr_ec_params[($version - 1) * 4 + $ecl];
/* Don't cut off mid-character if exceeding capacity. */
$max_chars = $this->qr_capacity[$version - 1][$ecl][$mode];
if ($mode == 3) $max_chars <<= 1;
$data = substr($data, 0, $max_chars);
/* Convert from character level to bit level. */
switch ($mode) {
case 0:
$code = $this->qr_encode_numeric($data, $version_group);
break;
case 1:
$code = $this->qr_encode_alphanumeric($data, $version_group);
break;
case 2:
$code = $this->qr_encode_binary($data, $version_group);
break;
case 3:
$code = $this->qr_encode_kanji($data, $version_group);
break;
}
for ($i = 0; $i < 4; $i++) $code[] = 0;
while (count($code) % 8) $code[] = 0;
/* Convert from bit level to byte level. */
$data = array();
for ($i = 0, $n = count($code); $i < $n; $i += 8) {
$byte = 0;
if ($code[$i + 0]) $byte |= 0x80;
if ($code[$i + 1]) $byte |= 0x40;
if ($code[$i + 2]) $byte |= 0x20;
if ($code[$i + 3]) $byte |= 0x10;
if ($code[$i + 4]) $byte |= 0x08;
if ($code[$i + 5]) $byte |= 0x04;
if ($code[$i + 6]) $byte |= 0x02;
if ($code[$i + 7]) $byte |= 0x01;
$data[] = $byte;
}
for ($i = count($data), $a = 1, $n = $ec_params[0]; $i < $n; $i++, $a ^= 1) {
$data[] = $a ? 236 : 17;
}
/* Return. */
return array($mode, $version, $ec_params, $data);
}
private function qr_detect_mode($data) {
$numeric = '/^[0-9]*$/';
$alphanumeric = '/^[0-9A-Z .\/:$%*+-]*$/';
$kanji = '/^([\x81-\x9F\xE0-\xEA][\x40-\xFC]|[\xEB][\x40-\xBF])*$/';
if (preg_match($numeric, $data)) return 0;
if (preg_match($alphanumeric, $data)) return 1;
if (preg_match($kanji, $data)) return 3;
return 2;
}
private function qr_detect_version($data, $mode, $ecl) {
$length = strlen($data);
if ($mode == 3) $length >>= 1;
for ($v = 0; $v < 40; $v++) {
if ($length <= $this->qr_capacity[$v][$ecl][$mode]) {
return $v + 1;
}
}
return 40;
}
private function qr_encode_numeric($data, $version_group) {
$code = array(0, 0, 0, 1);
$length = strlen($data);
switch ($version_group) {
case 2: /* 27 - 40 */
$code[] = $length & 0x2000;
$code[] = $length & 0x1000;
case 1: /* 10 - 26 */
$code[] = $length & 0x0800;
$code[] = $length & 0x0400;
case 0: /* 1 - 9 */
$code[] = $length & 0x0200;
$code[] = $length & 0x0100;
$code[] = $length & 0x0080;
$code[] = $length & 0x0040;
$code[] = $length & 0x0020;
$code[] = $length & 0x0010;
$code[] = $length & 0x0008;
$code[] = $length & 0x0004;
$code[] = $length & 0x0002;
$code[] = $length & 0x0001;
}
for ($i = 0; $i < $length; $i += 3) {
$group = substr($data, $i, 3);
switch (strlen($group)) {
case 3:
$code[] = $group & 0x200;
$code[] = $group & 0x100;
$code[] = $group & 0x080;
case 2:
$code[] = $group & 0x040;
$code[] = $group & 0x020;
$code[] = $group & 0x010;
case 1:
$code[] = $group & 0x008;
$code[] = $group & 0x004;
$code[] = $group & 0x002;
$code[] = $group & 0x001;
}
}
return $code;
}
private function qr_encode_alphanumeric($data, $version_group) {
$alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:';
$code = array(0, 0, 1, 0);
$length = strlen($data);
switch ($version_group) {
case 2: /* 27 - 40 */
$code[] = $length & 0x1000;
$code[] = $length & 0x0800;
case 1: /* 10 - 26 */
$code[] = $length & 0x0400;
$code[] = $length & 0x0200;
case 0: /* 1 - 9 */
$code[] = $length & 0x0100;
$code[] = $length & 0x0080;
$code[] = $length & 0x0040;
$code[] = $length & 0x0020;
$code[] = $length & 0x0010;
$code[] = $length & 0x0008;
$code[] = $length & 0x0004;
$code[] = $length & 0x0002;
$code[] = $length & 0x0001;
}
for ($i = 0; $i < $length; $i += 2) {
$group = substr($data, $i, 2);
if (strlen($group) > 1) {
$c1 = strpos($alphabet, substr($group, 0, 1));
$c2 = strpos($alphabet, substr($group, 1, 1));
$ch = $c1 * 45 + $c2;
$code[] = $ch & 0x400;
$code[] = $ch & 0x200;
$code[] = $ch & 0x100;
$code[] = $ch & 0x080;
$code[] = $ch & 0x040;
$code[] = $ch & 0x020;
$code[] = $ch & 0x010;
$code[] = $ch & 0x008;
$code[] = $ch & 0x004;
$code[] = $ch & 0x002;
$code[] = $ch & 0x001;
} else {
$ch = strpos($alphabet, $group);
$code[] = $ch & 0x020;
$code[] = $ch & 0x010;
$code[] = $ch & 0x008;
$code[] = $ch & 0x004;
$code[] = $ch & 0x002;
$code[] = $ch & 0x001;
}
}
return $code;
}
private function qr_encode_binary($data, $version_group) {
$code = array(0, 1, 0, 0);
$length = strlen($data);
switch ($version_group) {
case 2: /* 27 - 40 */
case 1: /* 10 - 26 */
$code[] = $length & 0x8000;
$code[] = $length & 0x4000;
$code[] = $length & 0x2000;
$code[] = $length & 0x1000;
$code[] = $length & 0x0800;
$code[] = $length & 0x0400;
$code[] = $length & 0x0200;
$code[] = $length & 0x0100;
case 0: /* 1 - 9 */
$code[] = $length & 0x0080;
$code[] = $length & 0x0040;
$code[] = $length & 0x0020;
$code[] = $length & 0x0010;
$code[] = $length & 0x0008;
$code[] = $length & 0x0004;
$code[] = $length & 0x0002;
$code[] = $length & 0x0001;
}
for ($i = 0; $i < $length; $i++) {
$ch = ord(substr($data, $i, 1));
$code[] = $ch & 0x80;
$code[] = $ch & 0x40;
$code[] = $ch & 0x20;
$code[] = $ch & 0x10;
$code[] = $ch & 0x08;
$code[] = $ch & 0x04;
$code[] = $ch & 0x02;
$code[] = $ch & 0x01;
}
return $code;
}
private function qr_encode_kanji($data, $version_group) {
$code = array(1, 0, 0, 0);
$length = strlen($data);
switch ($version_group) {
case 2: /* 27 - 40 */
$code[] = $length & 0x1000;
$code[] = $length & 0x0800;
case 1: /* 10 - 26 */
$code[] = $length & 0x0400;
$code[] = $length & 0x0200;
case 0: /* 1 - 9 */
$code[] = $length & 0x0100;
$code[] = $length & 0x0080;
$code[] = $length & 0x0040;
$code[] = $length & 0x0020;
$code[] = $length & 0x0010;
$code[] = $length & 0x0008;
$code[] = $length & 0x0004;
$code[] = $length & 0x0002;
}
for ($i = 0; $i < $length; $i += 2) {
$group = substr($data, $i, 2);
$c1 = ord(substr($group, 0, 1));
$c2 = ord(substr($group, 1, 1));
if ($c1 >= 0x81 && $c1 <= 0x9F && $c2 >= 0x40 && $c2 <= 0xFC) {
$ch = ($c1 - 0x81) * 0xC0 + ($c2 - 0x40);
} else if (
($c1 >= 0xE0 && $c1 <= 0xEA && $c2 >= 0x40 && $c2 <= 0xFC) ||
($c1 == 0xEB && $c2 >= 0x40 && $c2 <= 0xBF)
) {
$ch = ($c1 - 0xC1) * 0xC0 + ($c2 - 0x40);
} else {
$ch = 0;
}
$code[] = $ch & 0x1000;
$code[] = $ch & 0x0800;
$code[] = $ch & 0x0400;
$code[] = $ch & 0x0200;
$code[] = $ch & 0x0100;
$code[] = $ch & 0x0080;
$code[] = $ch & 0x0040;
$code[] = $ch & 0x0020;
$code[] = $ch & 0x0010;
$code[] = $ch & 0x0008;
$code[] = $ch & 0x0004;
$code[] = $ch & 0x0002;
$code[] = $ch & 0x0001;
}
return $code;
}
private function qr_encode_ec($data, $ec_params, $version) {
$blocks = $this->qr_ec_split($data, $ec_params);
$ec_blocks = array();
for ($i = 0, $n = count($blocks); $i < $n; $i++) {
$ec_blocks[] = $this->qr_ec_divide($blocks[$i], $ec_params);
}
$data = $this->qr_ec_interleave($blocks);
$ec_data = $this->qr_ec_interleave($ec_blocks);
$code = array();
foreach ($data as $ch) {
$code[] = $ch & 0x80;
$code[] = $ch & 0x40;
$code[] = $ch & 0x20;
$code[] = $ch & 0x10;
$code[] = $ch & 0x08;
$code[] = $ch & 0x04;
$code[] = $ch & 0x02;
$code[] = $ch & 0x01;
}
foreach ($ec_data as $ch) {
$code[] = $ch & 0x80;
$code[] = $ch & 0x40;
$code[] = $ch & 0x20;
$code[] = $ch & 0x10;
$code[] = $ch & 0x08;
$code[] = $ch & 0x04;
$code[] = $ch & 0x02;
$code[] = $ch & 0x01;
}
for ($n = $this->qr_remainder_bits[$version - 1]; $n > 0; $n--) {
$code[] = 0;
}
return $code;
}
private function qr_ec_split($data, $ec_params) {
$blocks = array();
$offset = 0;
for ($i = $ec_params[2], $length = $ec_params[3]; $i > 0; $i--) {
$blocks[] = array_slice($data, $offset, $length);
$offset += $length;
}
for ($i = $ec_params[4], $length = $ec_params[5]; $i > 0; $i--) {
$blocks[] = array_slice($data, $offset, $length);
$offset += $length;
}
return $blocks;
}
private function qr_ec_divide($data, $ec_params) {
$num_data = count($data);
$num_error = $ec_params[1];
$generator = $this->qr_ec_polynomials[$num_error];
$message = $data;
for ($i = 0; $i < $num_error; $i++) {
$message[] = 0;
}
for ($i = 0; $i < $num_data; $i++) {
if ($message[$i]) {
$leadterm = $this->qr_log[$message[$i]];
for ($j = 0; $j <= $num_error; $j++) {
$term = ($generator[$j] + $leadterm) % 255;
$message[$i + $j] ^= $this->qr_exp[$term];
}
}
}
return array_slice($message, $num_data, $num_error);
}
private function qr_ec_interleave($blocks) {
$data = array();
$num_blocks = count($blocks);
for ($offset = 0; true; $offset++) {
$break = true;
for ($i = 0; $i < $num_blocks; $i++) {
if (isset($blocks[$i][$offset])) {
$data[] = $blocks[$i][$offset];
$break = false;
}
}
if ($break) break;
}
return $data;
}
private function qr_create_matrix($version, $data) {
$size = $version * 4 + 17;
$matrix = array();
for ($i = 0; $i < $size; $i++) {
$row = array();
for ($j = 0; $j < $size; $j++) {
$row[] = 0;
}
$matrix[] = $row;
}
/* Finder patterns. */
for ($i = 0; $i < 8; $i++) {
for ($j = 0; $j < 8; $j++) {
$m = (($i == 7 || $j == 7) ? 2 :
(($i == 0 || $j == 0 || $i == 6 || $j == 6) ? 3 :
(($i == 1 || $j == 1 || $i == 5 || $j == 5) ? 2 : 3)));
$matrix[$i][$j] = $m;
$matrix[$size - $i - 1][$j] = $m;
$matrix[$i][$size - $j - 1] = $m;
}
}
/* Alignment patterns. */
if ($version >= 2) {
$alignment = $this->qr_alignment_patterns[$version - 2];
foreach ($alignment as $i) {
foreach ($alignment as $j) {
if (!$matrix[$i][$j]) {
for ($ii = -2; $ii <= 2; $ii++) {
for ($jj = -2; $jj <= 2; $jj++) {
$m = (max(abs($ii), abs($jj)) & 1) ^ 3;
$matrix[$i + $ii][$j + $jj] = $m;
}
}
}
}
}
}
/* Timing patterns. */
for ($i = $size - 9; $i >= 8; $i--) {
$matrix[$i][6] = ($i & 1) ^ 3;
$matrix[6][$i] = ($i & 1) ^ 3;
}
/* Dark module. Such an ominous name for such an innocuous thing. */
$matrix[$size - 8][8] = 3;
/* Format information area. */
for ($i = 0; $i <= 8; $i++) {
if (!$matrix[$i][8]) $matrix[$i][8] = 1;
if (!$matrix[8][$i]) $matrix[8][$i] = 1;
if ($i && !$matrix[$size - $i][8]) $matrix[$size - $i][8] = 1;
if ($i && !$matrix[8][$size - $i]) $matrix[8][$size - $i] = 1;
}
/* Version information area. */
if ($version >= 7) {
for ($i = 9; $i < 12; $i++) {
for ($j = 0; $j < 6; $j++) {
$matrix[$size - $i][$j] = 1;
$matrix[$j][$size - $i] = 1;
}
}
}
/* Data. */
$col = $size - 1;
$row = $size - 1;
$dir = -1;
$offset = 0;
$length = count($data);
while ($col > 0 && $offset < $length) {
if (!$matrix[$row][$col]) {
$matrix[$row][$col] = $data[$offset] ? 5 : 4;
$offset++;
}
if (!$matrix[$row][$col - 1]) {
$matrix[$row][$col - 1] = $data[$offset] ? 5 : 4;
$offset++;
}
$row += $dir;
if ($row < 0 || $row >= $size) {
$dir = -$dir;
$row += $dir;
$col -= 2;
if ($col == 6) $col--;
}
}
return array($size, $matrix);
}
private function qr_apply_best_mask($matrix, $size) {
$best_mask = 0;
$best_matrix = $this->qr_apply_mask($matrix, $size, $best_mask);
$best_penalty = $this->qr_penalty($best_matrix, $size);
for ($test_mask = 1; $test_mask < 8; $test_mask++) {
$test_matrix = $this->qr_apply_mask($matrix, $size, $test_mask);
$test_penalty = $this->qr_penalty($test_matrix, $size);
if ($test_penalty < $best_penalty) {
$best_mask = $test_mask;
$best_matrix = $test_matrix;
$best_penalty = $test_penalty;
}
}
return array($best_mask, $best_matrix);
}
private function qr_apply_mask($matrix, $size, $mask) {
for ($i = 0; $i < $size; $i++) {
for ($j = 0; $j < $size; $j++) {
if ($matrix[$i][$j] >= 4) {
if ($this->qr_mask($mask, $i, $j)) {
$matrix[$i][$j] ^= 1;
}
}
}
}
return $matrix;
}
private function qr_mask($mask, $r, $c) {
switch ($mask) {
case 0: return !( ($r + $c) % 2 );
case 1: return !( ($r ) % 2 );
case 2: return !( ( $c) % 3 );
case 3: return !( ($r + $c) % 3 );
case 4: return !( (floor(($r) / 2) + floor(($c) / 3)) % 2 );
case 5: return !( ((($r * $c) % 2) + (($r * $c) % 3)) );
case 6: return !( ((($r * $c) % 2) + (($r * $c) % 3)) % 2 );
case 7: return !( ((($r + $c) % 2) + (($r * $c) % 3)) % 2 );
}
}
private function qr_penalty(&$matrix, $size) {
$score = $this->qr_penalty_1($matrix, $size);
$score += $this->qr_penalty_2($matrix, $size);
$score += $this->qr_penalty_3($matrix, $size);
$score += $this->qr_penalty_4($matrix, $size);
return $score;
}
private function qr_penalty_1(&$matrix, $size) {
$score = 0;
for ($i = 0; $i < $size; $i++) {
$rowvalue = 0;
$rowcount = 0;
$colvalue = 0;
$colcount = 0;
for ($j = 0; $j < $size; $j++) {
$rv = ($matrix[$i][$j] == 5 || $matrix[$i][$j] == 3) ? 1 : 0;
$cv = ($matrix[$j][$i] == 5 || $matrix[$j][$i] == 3) ? 1 : 0;
if ($rv == $rowvalue) {
$rowcount++;
} else {
if ($rowcount >= 5) $score += $rowcount - 2;
$rowvalue = $rv;
$rowcount = 1;
}
if ($cv == $colvalue) {
$colcount++;
} else {
if ($colcount >= 5) $score += $colcount - 2;
$colvalue = $cv;
$colcount = 1;
}
}
if ($rowcount >= 5) $score += $rowcount - 2;
if ($colcount >= 5) $score += $colcount - 2;
}
return $score;
}
private function qr_penalty_2(&$matrix, $size) {
$score = 0;
for ($i = 1; $i < $size; $i++) {
for ($j = 1; $j < $size; $j++) {
$v1 = $matrix[$i - 1][$j - 1];
$v2 = $matrix[$i - 1][$j ];
$v3 = $matrix[$i ][$j - 1];
$v4 = $matrix[$i ][$j ];
$v1 = ($v1 == 5 || $v1 == 3) ? 1 : 0;
$v2 = ($v2 == 5 || $v2 == 3) ? 1 : 0;
$v3 = ($v3 == 5 || $v3 == 3) ? 1 : 0;
$v4 = ($v4 == 5 || $v4 == 3) ? 1 : 0;
if ($v1 == $v2 && $v2 == $v3 && $v3 == $v4) $score += 3;
}
}
return $score;
}
private function qr_penalty_3(&$matrix, $size) {
$score = 0;
for ($i = 0; $i < $size; $i++) {
$rowvalue = 0;
$colvalue = 0;
for ($j = 0; $j < 11; $j++) {
$rv = ($matrix[$i][$j] == 5 || $matrix[$i][$j] == 3) ? 1 : 0;
$cv = ($matrix[$j][$i] == 5 || $matrix[$j][$i] == 3) ? 1 : 0;
$rowvalue = (($rowvalue << 1) & 0x7FF) | $rv;
$colvalue = (($colvalue << 1) & 0x7FF) | $cv;
}
if ($rowvalue == 0x5D0 || $rowvalue == 0x5D) $score += 40;
if ($colvalue == 0x5D0 || $colvalue == 0x5D) $score += 40;
for ($j = 11; $j < $size; $j++) {
$rv = ($matrix[$i][$j] == 5 || $matrix[$i][$j] == 3) ? 1 : 0;
$cv = ($matrix[$j][$i] == 5 || $matrix[$j][$i] == 3) ? 1 : 0;
$rowvalue = (($rowvalue << 1) & 0x7FF) | $rv;
$colvalue = (($colvalue << 1) & 0x7FF) | $cv;
if ($rowvalue == 0x5D0 || $rowvalue == 0x5D) $score += 40;
if ($colvalue == 0x5D0 || $colvalue == 0x5D) $score += 40;
}
}
return $score;
}
private function qr_penalty_4(&$matrix, $size) {
$dark = 0;
for ($i = 0; $i < $size; $i++) {
for ($j = 0; $j < $size; $j++) {
if ($matrix[$i][$j] == 5 || $matrix[$i][$j] == 3) {
$dark++;
}
}
}
$dark *= 20;
$dark /= $size * $size;
$a = abs(floor($dark) - 10);
$b = abs(ceil($dark) - 10);
return min($a, $b) * 10;
}
private function qr_finalize_matrix($matrix, $size, $ecl, $mask, $version) {
/* Format Info */
$format = $this->qr_format_info[$ecl * 8 + $mask];
$matrix[8][0] = $format[0];
$matrix[8][1] = $format[1];
$matrix[8][2] = $format[2];
$matrix[8][3] = $format[3];
$matrix[8][4] = $format[4];
$matrix[8][5] = $format[5];
$matrix[8][7] = $format[6];
$matrix[8][8] = $format[7];
$matrix[7][8] = $format[8];
$matrix[5][8] = $format[9];
$matrix[4][8] = $format[10];
$matrix[3][8] = $format[11];
$matrix[2][8] = $format[12];
$matrix[1][8] = $format[13];
$matrix[0][8] = $format[14];
$matrix[$size - 1][8] = $format[0];
$matrix[$size - 2][8] = $format[1];
$matrix[$size - 3][8] = $format[2];
$matrix[$size - 4][8] = $format[3];
$matrix[$size - 5][8] = $format[4];
$matrix[$size - 6][8] = $format[5];
$matrix[$size - 7][8] = $format[6];
$matrix[8][$size - 8] = $format[7];
$matrix[8][$size - 7] = $format[8];
$matrix[8][$size - 6] = $format[9];
$matrix[8][$size - 5] = $format[10];
$matrix[8][$size - 4] = $format[11];
$matrix[8][$size - 3] = $format[12];
$matrix[8][$size - 2] = $format[13];
$matrix[8][$size - 1] = $format[14];
/* Version Info */
if ($version >= 7) {
$version = $this->qr_version_info[$version - 7];
for ($i = 0; $i < 18; $i++) {
$r = $size - 9 - ($i % 3);
$c = 5 - floor($i / 3);
$matrix[$r][$c] = $version[$i];
$matrix[$c][$r] = $version[$i];
}
}
/* Patterns & Data */
for ($i = 0; $i < $size; $i++) {
for ($j = 0; $j < $size; $j++) {
$matrix[$i][$j] &= 1;
}
}
return $matrix;
}
/* maximum encodable characters = $qr_capacity [ (version - 1) ] */
/* [ (0 for L, 1 for M, 2 for Q, 3 for H) ] */
/* [ (0 for numeric, 1 for alpha, 2 for binary, 3 for kanji) ] */
private $qr_capacity = array(
array(array( 41, 25, 17, 10), array( 34, 20, 14, 8), array( 27, 16, 11, 7), array( 17, 10, 7, 4)),
array(array( 77, 47, 32, 20), array( 63, 38, 26, 16), array( 48, 29, 20, 12), array( 34, 20, 14, 8)),
array(array( 127, 77, 53, 32), array( 101, 61, 42, 26), array( 77, 47, 32, 20), array( 58, 35, 24, 15)),
array(array( 187, 114, 78, 48), array( 149, 90, 62, 38), array( 111, 67, 46, 28), array( 82, 50, 34, 21)),
array(array( 255, 154, 106, 65), array( 202, 122, 84, 52), array( 144, 87, 60, 37), array( 106, 64, 44, 27)),
array(array( 322, 195, 134, 82), array( 255, 154, 106, 65), array( 178, 108, 74, 45), array( 139, 84, 58, 36)),
array(array( 370, 224, 154, 95), array( 293, 178, 122, 75), array( 207, 125, 86, 53), array( 154, 93, 64, 39)),
array(array( 461, 279, 192, 118), array( 365, 221, 152, 93), array( 259, 157, 108, 66), array( 202, 122, 84, 52)),
array(array( 552, 335, 230, 141), array( 432, 262, 180, 111), array( 312, 189, 130, 80), array( 235, 143, 98, 60)),
array(array( 652, 395, 271, 167), array( 513, 311, 213, 131), array( 364, 221, 151, 93), array( 288, 174, 119, 74)),
array(array( 772, 468, 321, 198), array( 604, 366, 251, 155), array( 427, 259, 177, 109), array( 331, 200, 137, 85)),
array(array( 883, 535, 367, 226), array( 691, 419, 287, 177), array( 489, 296, 203, 125), array( 374, 227, 155, 96)),
array(array(1022, 619, 425, 262), array( 796, 483, 331, 204), array( 580, 352, 241, 149), array( 427, 259, 177, 109)),
array(array(1101, 667, 458, 282), array( 871, 528, 362, 223), array( 621, 376, 258, 159), array( 468, 283, 194, 120)),
array(array(1250, 758, 520, 320), array( 991, 600, 412, 254), array( 703, 426, 292, 180), array( 530, 321, 220, 136)),
array(array(1408, 854, 586, 361), array(1082, 656, 450, 277), array( 775, 470, 322, 198), array( 602, 365, 250, 154)),
array(array(1548, 938, 644, 397), array(1212, 734, 504, 310), array( 876, 531, 364, 224), array( 674, 408, 280, 173)),
array(array(1725, 1046, 718, 442), array(1346, 816, 560, 345), array( 948, 574, 394, 243), array( 746, 452, 310, 191)),
array(array(1903, 1153, 792, 488), array(1500, 909, 624, 384), array(1063, 644, 442, 272), array( 813, 493, 338, 208)),
array(array(2061, 1249, 858, 528), array(1600, 970, 666, 410), array(1159, 702, 482, 297), array( 919, 557, 382, 235)),
array(array(2232, 1352, 929, 572), array(1708, 1035, 711, 438), array(1224, 742, 509, 314), array( 969, 587, 403, 248)),
array(array(2409, 1460, 1003, 618), array(1872, 1134, 779, 480), array(1358, 823, 565, 348), array(1056, 640, 439, 270)),
array(array(2620, 1588, 1091, 672), array(2059, 1248, 857, 528), array(1468, 890, 611, 376), array(1108, 672, 461, 284)),
array(array(2812, 1704, 1171, 721), array(2188, 1326, 911, 561), array(1588, 963, 661, 407), array(1228, 744, 511, 315)),
array(array(3057, 1853, 1273, 784), array(2395, 1451, 997, 614), array(1718, 1041, 715, 440), array(1286, 779, 535, 330)),
array(array(3283, 1990, 1367, 842), array(2544, 1542, 1059, 652), array(1804, 1094, 751, 462), array(1425, 864, 593, 365)),
array(array(3517, 2132, 1465, 902), array(2701, 1637, 1125, 692), array(1933, 1172, 805, 496), array(1501, 910, 625, 385)),
array(array(3669, 2223, 1528, 940), array(2857, 1732, 1190, 732), array(2085, 1263, 868, 534), array(1581, 958, 658, 405)),
array(array(3909, 2369, 1628, 1002), array(3035, 1839, 1264, 778), array(2181, 1322, 908, 559), array(1677, 1016, 698, 430)),
array(array(4158, 2520, 1732, 1066), array(3289, 1994, 1370, 843), array(2358, 1429, 982, 604), array(1782, 1080, 742, 457)),
array(array(4417, 2677, 1840, 1132), array(3486, 2113, 1452, 894), array(2473, 1499, 1030, 634), array(1897, 1150, 790, 486)),
array(array(4686, 2840, 1952, 1201), array(3693, 2238, 1538, 947), array(2670, 1618, 1112, 684), array(2022, 1226, 842, 518)),
array(array(4965, 3009, 2068, 1273), array(3909, 2369, 1628, 1002), array(2805, 1700, 1168, 719), array(2157, 1307, 898, 553)),
array(array(5253, 3183, 2188, 1347), array(4134, 2506, 1722, 1060), array(2949, 1787, 1228, 756), array(2301, 1394, 958, 590)),
array(array(5529, 3351, 2303, 1417), array(4343, 2632, 1809, 1113), array(3081, 1867, 1283, 790), array(2361, 1431, 983, 605)),
array(array(5836, 3537, 2431, 1496), array(4588, 2780, 1911, 1176), array(3244, 1966, 1351, 832), array(2524, 1530, 1051, 647)),
array(array(6153, 3729, 2563, 1577), array(4775, 2894, 1989, 1224), array(3417, 2071, 1423, 876), array(2625, 1591, 1093, 673)),
array(array(6479, 3927, 2699, 1661), array(5039, 3054, 2099, 1292), array(3599, 2181, 1499, 923), array(2735, 1658, 1139, 701)),
array(array(6743, 4087, 2809, 1729), array(5313, 3220, 2213, 1362), array(3791, 2298, 1579, 972), array(2927, 1774, 1219, 750)),
array(array(7089, 4296, 2953, 1817), array(5596, 3391, 2331, 1435), array(3993, 2420, 1663, 1024), array(3057, 1852, 1273, 784)),
);
/* $qr_ec_params[ */
/* 4 * (version - 1) + (0 for L, 1 for M, 2 for Q, 3 for H) */
/* ] = array( */
/* total number of data codewords, */
/* number of error correction codewords per block, */
/* number of blocks in first group, */
/* number of data codewords per block in first group, */
/* number of blocks in second group, */
/* number of data codewords per block in second group */
/* ); */
private $qr_ec_params = array(
array( 19, 7, 1, 19, 0, 0 ),
array( 16, 10, 1, 16, 0, 0 ),
array( 13, 13, 1, 13, 0, 0 ),
array( 9, 17, 1, 9, 0, 0 ),
array( 34, 10, 1, 34, 0, 0 ),
array( 28, 16, 1, 28, 0, 0 ),
array( 22, 22, 1, 22, 0, 0 ),
array( 16, 28, 1, 16, 0, 0 ),
array( 55, 15, 1, 55, 0, 0 ),
array( 44, 26, 1, 44, 0, 0 ),
array( 34, 18, 2, 17, 0, 0 ),
array( 26, 22, 2, 13, 0, 0 ),
array( 80, 20, 1, 80, 0, 0 ),
array( 64, 18, 2, 32, 0, 0 ),
array( 48, 26, 2, 24, 0, 0 ),
array( 36, 16, 4, 9, 0, 0 ),
array( 108, 26, 1, 108, 0, 0 ),
array( 86, 24, 2, 43, 0, 0 ),
array( 62, 18, 2, 15, 2, 16 ),
array( 46, 22, 2, 11, 2, 12 ),
array( 136, 18, 2, 68, 0, 0 ),
array( 108, 16, 4, 27, 0, 0 ),
array( 76, 24, 4, 19, 0, 0 ),
array( 60, 28, 4, 15, 0, 0 ),
array( 156, 20, 2, 78, 0, 0 ),
array( 124, 18, 4, 31, 0, 0 ),
array( 88, 18, 2, 14, 4, 15 ),
array( 66, 26, 4, 13, 1, 14 ),
array( 194, 24, 2, 97, 0, 0 ),
array( 154, 22, 2, 38, 2, 39 ),
array( 110, 22, 4, 18, 2, 19 ),
array( 86, 26, 4, 14, 2, 15 ),
array( 232, 30, 2, 116, 0, 0 ),
array( 182, 22, 3, 36, 2, 37 ),
array( 132, 20, 4, 16, 4, 17 ),
array( 100, 24, 4, 12, 4, 13 ),
array( 274, 18, 2, 68, 2, 69 ),
array( 216, 26, 4, 43, 1, 44 ),
array( 154, 24, 6, 19, 2, 20 ),
array( 122, 28, 6, 15, 2, 16 ),
array( 324, 20, 4, 81, 0, 0 ),
array( 254, 30, 1, 50, 4, 51 ),
array( 180, 28, 4, 22, 4, 23 ),
array( 140, 24, 3, 12, 8, 13 ),
array( 370, 24, 2, 92, 2, 93 ),
array( 290, 22, 6, 36, 2, 37 ),
array( 206, 26, 4, 20, 6, 21 ),
array( 158, 28, 7, 14, 4, 15 ),
array( 428, 26, 4, 107, 0, 0 ),
array( 334, 22, 8, 37, 1, 38 ),
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