com-tecnick-tcpdf

# Source for file qrcode.php Documentation is available at qrcode.php <?php //============================================================+ // File name : qrcode.php // Version : 1.0.006 // Begin : 2010-03-22 // Last Update : 2010-08-30 // Author : Nicola Asuni - Tecnick.com S.r.l - Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com // License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html) // ------------------------------------------------------------------- // Copyright (C) 2010-2010 Nicola Asuni - Tecnick.com S.r.l. // // This file is part of TCPDF software library. // // TCPDF is free software: you can redistribute it and/or modify it // under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation, either version 3 of the // License, or (at your option) any later version. // // TCPDF is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. // See the GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with TCPDF. If not, see <http://www.gnu.org/licenses/>. // // See LICENSE.TXT file for more information. // ------------------------------------------------------------------- // // DESCRIPTION : // // Class to create QR-code arrays for TCPDF class. // QR Code symbol is a 2D barcode that can be scanned by // handy terminals such as a mobile phone with CCD. // The capacity of QR Code is up to 7000 digits or 4000 // characters, and has high robustness. // This class supports QR Code model 2, described in // JIS (Japanese Industrial Standards) X0510:2004 // or ISO/IEC 18004. // Currently the following features are not supported: // ECI and FNC1 mode, Micro QR Code, QR Code model 1, // Structured mode. // // This class is derived from the following projects: // --------------------------------------------------------- // "PHP QR Code encoder" // License: GNU-LGPLv3 // Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm> // http://phpqrcode.sourceforge.net/ // https://sourceforge.net/projects/phpqrcode/ // // The "PHP QR Code encoder" is based on // "C libqrencode library" (ver. 3.1.1) // License: GNU-LGPL 2.1 // Copyright (C) 2006-2010 by Kentaro Fukuchi // http://megaui.net/fukuchi/works/qrencode/index.en.html // // Reed-Solomon code encoder is written by Phil Karn, KA9Q. // Copyright (C) 2002-2006 Phil Karn, KA9Q // // QR Code is registered trademark of DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/index-e.html // --------------------------------------------------------- //============================================================+ /** * Class to create QR-code arrays for TCPDF class. * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD. * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode. * * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html). * Please read comments on this class source file for full copyright and license information. * * @package com.tecnick.tcpdf * @abstract Class for generating QR-code array for TCPDF. * @author Nicola Asuni * @copyright 2010-2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com * @link http://www.tcpdf.org * @license http://www.gnu.org/copyleft/lesser.html LGPL * @version 1.0.006 */ // definitions if (!defined('QRCODEDEFS')) { /** * Indicate that definitions for this class are set */ define('QRCODEDEFS', true); // ----------------------------------------------------- // Encoding modes (characters which can be encoded in QRcode) /** * Encoding mode */ define('QR_MODE_NL', -1); /** * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode. */ define('QR_MODE_NM', 0); /** * Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode. */ define('QR_MODE_AN', 1); /** * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode. */ define('QR_MODE_8B', 2); /** * Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode. */ define('QR_MODE_KJ', 3); /** * Encoding mode STRUCTURED (currently unsupported) */ define('QR_MODE_ST', 4); // ----------------------------------------------------- // Levels of error correction. // QRcode has a function of an error correcting for miss reading that white is black. // Error correcting is defined in 4 level as below. /** * Error correction level L : About 7% or less errors can be corrected. */ define('QR_ECLEVEL_L', 0); /** * Error correction level M : About 15% or less errors can be corrected. */ define('QR_ECLEVEL_M', 1); /** * Error correction level Q : About 25% or less errors can be corrected. */ define('QR_ECLEVEL_Q', 2); /** * Error correction level H : About 30% or less errors can be corrected. */ define('QR_ECLEVEL_H', 3); // ----------------------------------------------------- // Version. Size of QRcode is defined as version. // Version is from 1 to 40. // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. // So version 40 is 177*177 matrix. /** * Maximum QR Code version. */ define('QRSPEC_VERSION_MAX', 40); /** * Maximum matrix size for maximum version (version 40 is 177*177 matrix). */ define('QRSPEC_WIDTH_MAX', 177); // ----------------------------------------------------- /** * Matrix index to get width from $capacity array. */ define('QRCAP_WIDTH', 0); /** * Matrix index to get number of words from $capacity array. */ define('QRCAP_WORDS', 1); /** * Matrix index to get remainder from $capacity array. */ define('QRCAP_REMINDER', 2); /** * Matrix index to get error correction level from $capacity array. */ define('QRCAP_EC', 3); // ----------------------------------------------------- // Structure (currently usupported) /** * Number of header bits for structured mode */ define('STRUCTURE_HEADER_BITS', 20); /** * Max number of symbols for structured mode */ define('MAX_STRUCTURED_SYMBOLS', 16); // ----------------------------------------------------- // Masks /** * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column) */ define('N1', 3); /** * Down point base value for case 2 mask pattern (module block of same color) */ define('N2', 3); /** * Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column) */ define('N3', 40); /** * Down point base value for case 4 mask pattern (ration of dark modules in whole) */ define('N4', 10); // ----------------------------------------------------- // Optimization settings /** * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code */ define('QR_FIND_BEST_MASK', true); /** * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly */ define('QR_FIND_FROM_RANDOM', 2); /** * when QR_FIND_BEST_MASK === false */ define('QR_DEFAULT_MASK', 2); // ----------------------------------------------------- } // end of definitions // #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*# if (!class_exists('QRcode', false)) { // for compatibility with PHP4 if (!function_exists('str_split')) { /** * Convert a string to an array (needed for PHP4 compatibility) * @param string $string The input string. * @param int $split_length Maximum length of the chunk. * @return If the optional split_length parameter is specified, the returned array will be broken down into chunks with each being split_length in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element. */ function str_split($string, $split_length=1) { if ((strlen($string) > $split_length) OR (!$split_length)) { do { $c = strlen($string); $parts[] = substr($string, 0, $split_length); $string = substr($string, $split_length); } while ($string !== false); } else { $parts = array($string); } return $parts; } } // ##################################################### /** * Class to create QR-code arrays for TCPDF class. * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD. * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode. * * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html). * Please read comments on this class source file for full copyright and license information. * * @name QRcode * @package com.tecnick.tcpdf * @abstract Class for generating QR-code array for TCPDF. * @author Nicola Asuni * @copyright 2010-2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com * @link http://www.tcpdf.org * @license http://www.gnu.org/copyleft/lesser.html LGPL * @version 1.0.006 */ class QRcode { /** * @var barcode array to be returned which is readable by TCPDF * @access protected */ protected $barcode_array = array(); /** * @var QR code version. Size of QRcode is defined as version. Version is from 1 to 40. Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. So version 40 is 177*177 matrix. * @access protected */ protected $version = 0; /** * @var Levels of error correction. See definitions for possible values. * @access protected */ protected $level = QR_ECLEVEL_L; /** * @var Encoding mode * @access protected */ protected $hint = QR_MODE_8B; /** * @var if true the input string will be converted to uppercase * @access protected */ protected $casesensitive = true; /** * @var structured QR code (not supported yet) * @access protected */ protected $structured = 0; /** * @var mask data * @access protected */ protected $data; // FrameFiller /** * @var width * @access protected */ protected $width; /** * @var frame * @access protected */ protected $frame; /** * @var X position of bit * @access protected */ protected $x; /** * @var Y position of bit * @access protected */ protected $y; /** * @var direction * @access protected */ protected $dir; /** * @var single bit * @access protected */ protected $bit; // ---- QRrawcode ---- /** * @var data code * @access protected */ protected $datacode = array(); /** * @var error correction code * @access protected */ protected $ecccode = array(); /** * @var blocks * @access protected */ protected $blocks; /** * @var Reed-Solomon blocks * @access protected */ protected $rsblocks = array(); //of RSblock /** * @var counter * @access protected */ protected $count; /** * @var data length * @access protected */ protected $dataLength; /** * @var error correction length * @access protected */ protected $eccLength; /** * @var b1 * @access protected */ protected $b1; // ---- QRmask ---- /** * @var run length * @access protected */ protected $runLength = array(); // ---- QRsplit ---- /** * @var input data string * @access protected */ protected $dataStr = ''; /** * @var input items * @access protected */ protected $items; // Reed-Solomon items /** * @var Reed-Solomon items * @access protected */ protected $rsitems = array(); /** * @var array of frames * @access protected */ protected $frames = array(); /** * @var alphabet-numeric convesion table * @access protected */ protected $anTable = array( -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, // -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, // 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, // -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // ); /** * @var array Table of the capacity of symbols * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004. * @access protected */ protected $capacity = array( array( 0, 0, 0, array( 0, 0, 0, 0)), // array( 21, 26, 0, array( 7, 10, 13, 17)), // 1 array( 25, 44, 7, array( 10, 16, 22, 28)), // array( 29, 70, 7, array( 15, 26, 36, 44)), // array( 33, 100, 7, array( 20, 36, 52, 64)), // array( 37, 134, 7, array( 26, 48, 72, 88)), // 5 array( 41, 172, 7, array( 36, 64, 96, 112)), // array( 45, 196, 0, array( 40, 72, 108, 130)), // array( 49, 242, 0, array( 48, 88, 132, 156)), // array( 53, 292, 0, array( 60, 110, 160, 192)), // array( 57, 346, 0, array( 72, 130, 192, 224)), // 10 array( 61, 404, 0, array( 80, 150, 224, 264)), // array( 65, 466, 0, array( 96, 176, 260, 308)), // array( 69, 532, 0, array( 104, 198, 288, 352)), // array( 73, 581, 3, array( 120, 216, 320, 384)), // array( 77, 655, 3, array( 132, 240, 360, 432)), // 15 array( 81, 733, 3, array( 144, 280, 408, 480)), // array( 85, 815, 3, array( 168, 308, 448, 532)), // array( 89, 901, 3, array( 180, 338, 504, 588)), // array( 93, 991, 3, array( 196, 364, 546, 650)), // array( 97, 1085, 3, array( 224, 416, 600, 700)), // 20 array(101, 1156, 4, array( 224, 442, 644, 750)), // array(105, 1258, 4, array( 252, 476, 690, 816)), // array(109, 1364, 4, array( 270, 504, 750, 900)), // array(113, 1474, 4, array( 300, 560, 810, 960)), // array(117, 1588, 4, array( 312, 588, 870, 1050)), // 25 array(121, 1706, 4, array( 336, 644, 952, 1110)), // array(125, 1828, 4, array( 360, 700, 1020, 1200)), // array(129, 1921, 3, array( 390, 728, 1050, 1260)), // array(133, 2051, 3, array( 420, 784, 1140, 1350)), // array(137, 2185, 3, array( 450, 812, 1200, 1440)), // 30 array(141, 2323, 3, array( 480, 868, 1290, 1530)), // array(145, 2465, 3, array( 510, 924, 1350, 1620)), // array(149, 2611, 3, array( 540, 980, 1440, 1710)), // array(153, 2761, 3, array( 570, 1036, 1530, 1800)), // array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35 array(161, 3034, 0, array( 600, 1120, 1680, 1980)), // array(165, 3196, 0, array( 630, 1204, 1770, 2100)), // array(169, 3362, 0, array( 660, 1260, 1860, 2220)), // array(173, 3532, 0, array( 720, 1316, 1950, 2310)), // array(177, 3706, 0, array( 750, 1372, 2040, 2430)) // 40 ); /** * @var array Length indicator * @access protected */ protected $lengthTableBits = array( array(10, 12, 14), array( 9, 11, 13), array( 8, 16, 16), array( 8, 10, 12) ); /** * @var array Table of the error correction code (Reed-Solomon block) * See Table 12-16 (pp.30-36), JIS X0510:2004. * @access protected */ protected $eccTable = array( array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)), // array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1 array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)), // array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)), // array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5 array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)), // array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)), // array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)), // array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)), // array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), // 10 array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)), // array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)), // array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)), // array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)), // array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), // 15 array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)), // array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)), // array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)), // array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)), // array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), // 20 array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)), // array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)), // array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)), // array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)), // array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), // 25 array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)), // array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)), // array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), // array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)), // array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30 array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)), // array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)), // array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)), // array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)), // array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), // 35 array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), // array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)), // array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), // array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)), // array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)) // 40 ); /** * @var array Positions of alignment patterns. * This array includes only the second and the third position of the alignment patterns. Rest of them can be calculated from the distance between them. * See Table 1 in Appendix E (pp.71) of JIS X0510:2004. * @access protected */ protected $alignmentPattern = array( array( 0, 0), array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5 array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10 array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15 array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20 array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25 array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30 array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35 array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58) // 35-40 ); /** * @var array Version information pattern (BCH coded). * See Table 1 in Appendix D (pp.68) of JIS X0510:2004. * size: [QRSPEC_VERSION_MAX - 6] * @access protected */ protected $versionPattern = array( 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, // 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, // 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, // 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, // 0x27541, 0x28c69 ); /** * @var array Format information * @access protected */ protected $formatInfo = array( array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), // array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), // array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), // array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b) // ); // ------------------------------------------------- // ------------------------------------------------- /** * This is the class constructor. * Creates a QRcode object * @param string $code code to represent using QRcode * @param string $eclevel error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul> * @access public * @since 1.0.000 */ public function __construct($code, $eclevel = 'L') { $barcode_array = array(); if ((is_null($code)) OR ($code == '\0') OR ($code == '')) { return false; } // set error correction level $this->level = array_search($eclevel, array('L', 'M', 'Q', 'H')); if ($this->level === false) { $this->level = QR_ECLEVEL_L; } if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) { return false; } if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) { return false; } $this->items = array(); $this->encodeString($code); if (is_null($this->data)) { return false; } $qrTab = $this->binarize($this->data); $size = count($qrTab); $barcode_array['num_rows'] = $size; $barcode_array['num_cols'] = $size; $barcode_array['bcode'] = array(); foreach ($qrTab as $line) { $arrAdd = array(); foreach (str_split($line) as $char) { $arrAdd[] = ($char=='1')?1:0; } $barcode_array['bcode'][] = $arrAdd; } $this->barcode_array = $barcode_array; } /** * Returns a barcode array which is readable by TCPDF * @return array barcode array readable by TCPDF; * @access public */ public function getBarcodeArray() { return $this->barcode_array; } /** * Convert the frame in binary form * @param array $frame array to binarize * @return array frame in binary form */ protected function binarize($frame) { $len = count($frame); // the frame is square (width = height) foreach ($frame as &$frameLine) { for ($i=0; $i<$len; $i++) { $frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0'; } } return $frame; } /** * Encode the input string to QR code * @param string $string input string to encode */ protected function encodeString($string) { $this->dataStr = $string; if (!$this->casesensitive) { $this->toUpper(); } $ret = $this->splitString(); if ($ret < 0) { return NULL; } $this->encodeMask(-1); } /** * Encode mask * @param int $mask masking mode */ protected function encodeMask($mask) { $spec = array(0, 0, 0, 0, 0); $this->datacode = $this->getByteStream($this->items); if (is_null($this->datacode)) { return NULL; } $spec = $this->getEccSpec($this->version, $this->level, $spec); $this->b1 = $this->rsBlockNum1($spec); $this->dataLength = $this->rsDataLength($spec); $this->eccLength = $this->rsEccLength($spec); $this->ecccode = array_fill(0, $this->eccLength, 0); $this->blocks = $this->rsBlockNum($spec); $ret = $this->init($spec); if ($ret < 0) { return NULL; } $this->count = 0; $this->width = $this->getWidth($this->version); $this->frame = $this->newFrame($this->version); $this->x = $this->width - 1; $this->y = $this->width - 1; $this->dir = -1; $this->bit = -1; // inteleaved data and ecc codes for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) { $code = $this->getCode(); $bit = 0x80; for ($j=0; $j<8; $j++) { $addr = $this->getNextPosition(); $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0)); $bit = $bit >> 1; } } // remainder bits $j = $this->getRemainder($this->version); for ($i=0; $i<$j; $i++) { $addr = $this->getNextPosition(); $this->setFrameAt($addr, 0x02); } // masking $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0); if ($mask < 0) { if (QR_FIND_BEST_MASK) { $masked = $this->mask($this->width, $this->frame, $this->level); } else { $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level); } } else { $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level); } if ($masked == NULL) { return NULL; } $this->data = $masked; } // - - - - - - - - - - - - - - - - - - - - - - - - - // FrameFiller /** * Set frame value at specified position * @param array $at x,y position * @param int $val value of the character to set */ protected function setFrameAt($at, $val) { $this->frame[$at['y']][$at['x']] = chr($val); } /** * Get frame value at specified position * @param array $at x,y position * @return value at specified position */ protected function getFrameAt($at) { return ord($this->frame[$at['y']][$at['x']]); } /** * Return the next frame position * @return array of x,y coordinates */ protected function getNextPosition() { do { if ($this->bit == -1) { $this->bit = 0; return array('x'=>$this->x, 'y'=>$this->y); } $x = $this->x; $y = $this->y; $w = $this->width; if ($this->bit == 0) { $x--; $this->bit++; } else { $x++; $y += $this->dir; $this->bit--; } if ($this->dir < 0) { if ($y < 0) { $y = 0; $x -= 2; $this->dir = 1; if ($x == 6) { $x--; $y = 9; } } } else { if ($y == $w) { $y = $w - 1; $x -= 2; $this->dir = -1; if ($x == 6) { $x--; $y -= 8; } } } if (($x < 0) OR ($y < 0)) { return NULL; } $this->x = $x; $this->y = $y; } while(ord($this->frame[$y][$x]) & 0x80); return array('x'=>$x, 'y'=>$y); } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRrawcode /** * Initialize code. * @param array $spec array of ECC specification * @return 0 in case of success, -1 in case of error */ protected function init($spec) { $dl = $this->rsDataCodes1($spec); $el = $this->rsEccCodes1($spec); $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el); $blockNo = 0; $dataPos = 0; $eccPos = 0; $endfor = $this->rsBlockNum1($spec); for ($i=0; $i < $endfor; ++$i) { $ecc = array_slice($this->ecccode, $eccPos); $this->rsblocks[$blockNo] = array(); $this->rsblocks[$blockNo]['dataLength'] = $dl; $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos); $this->rsblocks[$blockNo]['eccLength'] = $el; $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc); $this->rsblocks[$blockNo]['ecc'] = $ecc; $this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc); $dataPos += $dl; $eccPos += $el; $blockNo++; } if ($this->rsBlockNum2($spec) == 0) { return 0; } $dl = $this->rsDataCodes2($spec); $el = $this->rsEccCodes2($spec); $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el); if ($rs == NULL) { return -1; } $endfor = $this->rsBlockNum2($spec); for ($i=0; $i < $endfor; ++$i) { $ecc = array_slice($this->ecccode, $eccPos); $this->rsblocks[$blockNo] = array(); $this->rsblocks[$blockNo]['dataLength'] = $dl; $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos); $this->rsblocks[$blockNo]['eccLength'] = $el; $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc); $this->rsblocks[$blockNo]['ecc'] = $ecc; $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc); $dataPos += $dl; $eccPos += $el; $blockNo++; } return 0; } /** * Return Reed-Solomon block code. * @return array rsblocks */ protected function getCode() { if ($this->count < $this->dataLength) { $row = $this->count % $this->blocks; $col = $this->count / $this->blocks; if ($col >= $this->rsblocks[0]['dataLength']) { $row += $this->b1; } $ret = $this->rsblocks[$row]['data'][$col]; } elseif ($this->count < $this->dataLength + $this->eccLength) { $row = ($this->count - $this->dataLength) % $this->blocks; $col = ($this->count - $this->dataLength) / $this->blocks; $ret = $this->rsblocks[$row]['ecc'][$col]; } else { return 0; } $this->count++; return $ret; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRmask /** * Write Format Information on frame and returns the number of black bits * @param int $width frame width * @param array $frame frame * @param array $mask masking mode * @param int $level error correction level * @return int blacks */ protected function writeFormatInformation($width, &$frame, $mask, $level) { $blacks = 0; $format = $this->getFormatInfo($mask, $level); for ($i=0; $i<8; ++$i) { if ($format & 1) { $blacks += 2; $v = 0x85; } else { $v = 0x84; } $frame[8][$width - 1 - $i] = chr($v); if ($i < 6) { $frame[$i][8] = chr($v); } else { $frame[$i + 1][8] = chr($v); } $format = $format >> 1; } for ($i=0; $i<7; ++$i) { if ($format & 1) { $blacks += 2; $v = 0x85; } else { $v = 0x84; } $frame[$width - 7 + $i][8] = chr($v); if ($i == 0) { $frame[8][7] = chr($v); } else { $frame[8][6 - $i] = chr($v); } $format = $format >> 1; } return $blacks; } /** * mask0 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask0($x, $y) { return ($x + $y) & 1; } /** * mask1 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask1($x, $y) { return ($y & 1); } /** * mask2 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask2($x, $y) { return ($x % 3); } /** * mask3 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask3($x, $y) { return ($x + $y) % 3; } /** * mask4 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask4($x, $y) { return (((int)($y / 2)) + ((int)($x / 3))) & 1; } /** * mask5 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask5($x, $y) { return (($x * $y) & 1) + ($x * $y) % 3; } /** * mask6 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask6($x, $y) { return ((($x * $y) & 1) + ($x * $y) % 3) & 1; } /** * mask7 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask7($x, $y) { return ((($x * $y) % 3) + (($x + $y) & 1)) & 1; } /** * Return bitmask * @param int $maskNo mask number * @param int $width width * @param array $frame frame * @return array bitmask */ protected function generateMaskNo($maskNo, $width, $frame) { $bitMask = array_fill(0, $width, array_fill(0, $width, 0)); for ($y=0; $y<$width; ++$y) { for ($x=0; $x<$width; ++$x) { if (ord($frame[$y][$x]) & 0x80) { $bitMask[$y][$x] = 0; } else { $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y); $bitMask[$y][$x] = ($maskFunc == 0)?1:0; } } } return $bitMask; } /** * makeMaskNo * @param int $maskNo * @param int $width * @param int $s * @param int $d * @param boolean $maskGenOnly * @return int b */ protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) { $b = 0; $bitMask = array(); $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d); if ($maskGenOnly) { return; } $d = $s; for ($y=0; $y<$width; ++$y) { for ($x=0; $x<$width; ++$x) { if ($bitMask[$y][$x] == 1) { $d[$y][$x] = chr(ord($s[$y][$x]) ^ (int)$bitMask[$y][$x]); } $b += (int)(ord($d[$y][$x]) & 1); } } return $b; } /** * makeMask * @param int $width * @param array $frame * @param int $maskNo * @param int $level * @return array mask */ protected function makeMask($width, $frame, $maskNo, $level) { $masked = array_fill(0, $width, str_repeat("\0", $width)); $this->makeMaskNo($maskNo, $width, $frame, $masked); $this->writeFormatInformation($width, $masked, $maskNo, $level); return $masked; } /** * calcN1N3 * @param int $length * @return int demerit */ protected function calcN1N3($length) { $demerit = 0; for ($i=0; $i<$length; ++$i) { if ($this->runLength[$i] >= 5) { $demerit += (N1 + ($this->runLength[$i] - 5)); } if ($i & 1) { if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) { $fact = (int)($this->runLength[$i] / 3); if (($this->runLength[$i-2] == $fact) AND ($this->runLength[$i-1] == $fact) AND ($this->runLength[$i+1] == $fact) AND ($this->runLength[$i+2] == $fact)) { if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) { $demerit += N3; } elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) { $demerit += N3; } } } } } return $demerit; } /** * evaluateSymbol * @param int $width * @param array $frame * @return int demerit */ protected function evaluateSymbol($width, $frame) { $head = 0; $demerit = 0; for ($y=0; $y<$width; ++$y) { $head = 0; $this->runLength[0] = 1; $frameY = $frame[$y]; if ($y > 0) { $frameYM = $frame[$y-1]; } for ($x=0; $x<$width; ++$x) { if (($x > 0) AND ($y > 0)) { $b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]); $w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]); if (($b22 | ($w22 ^ 1)) & 1) { $demerit += N2; } } if (($x == 0) AND (ord($frameY[$x]) & 1)) { $this->runLength[0] = -1; $head = 1; $this->runLength[$head] = 1; } elseif ($x > 0) { if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) { $head++; $this->runLength[$head] = 1; } else { $this->runLength[$head]++; } } } $demerit += $this->calcN1N3($head+1); } for ($x=0; $x<$width; ++$x) { $head = 0; $this->runLength[0] = 1; for ($y=0; $y<$width; ++$y) { if (($y == 0) AND (ord($frame[$y][$x]) & 1)) { $this->runLength[0] = -1; $head = 1; $this->runLength[$head] = 1; } elseif ($y > 0) { if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) { $head++; $this->runLength[$head] = 1; } else { $this->runLength[$head]++; } } } $demerit += $this->calcN1N3($head+1); } return $demerit; } /** * mask * @param int $width * @param array $frame * @param int $level * @return array best mask */ protected function mask($width, $frame, $level) { $minDemerit = PHP_INT_MAX; $bestMaskNum = 0; $bestMask = array(); $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7); if (QR_FIND_FROM_RANDOM !== false) { $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9); for ($i = 0; $i < $howManuOut; ++$i) { $remPos = rand (0, count($checked_masks)-1); unset($checked_masks[$remPos]); $checked_masks = array_values($checked_masks); } } $bestMask = $frame; foreach ($checked_masks as $i) { $mask = array_fill(0, $width, str_repeat("\0", $width)); $demerit = 0; $blacks = 0; $blacks = $this->makeMaskNo($i, $width, $frame, $mask); $blacks += $this->writeFormatInformation($width, $mask, $i, $level); $blacks = (int)(100 * $blacks / ($width * $width)); $demerit = (int)((int)(abs($blacks - 50) / 5) * N4); $demerit += $this->evaluateSymbol($width, $mask); if ($demerit < $minDemerit) { $minDemerit = $demerit; $bestMask = $mask; $bestMaskNum = $i; } } return $bestMask; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRsplit /** * Return true if the character at specified position is a number * @param string $str string * @param int $pos characted position * @return boolean true of false */ protected function isdigitat($str, $pos) { if ($pos >= strlen($str)) { return false; } return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9'))); } /** * Return true if the character at specified position is an alphanumeric character * @param string $str string * @param int $pos characted position * @return boolean true of false */ protected function isalnumat($str, $pos) { if ($pos >= strlen($str)) { return false; } return ($this->lookAnTable(ord($str[$pos])) >= 0); } /** * identifyMode * @param int $pos * @return int mode */ protected function identifyMode($pos) { if ($pos >= strlen($this->dataStr)) { return QR_MODE_NL; } $c = $this->dataStr[$pos]; if ($this->isdigitat($this->dataStr, $pos)) { return QR_MODE_NM; } elseif ($this->isalnumat($this->dataStr, $pos)) { return QR_MODE_AN; } elseif ($this->hint == QR_MODE_KJ) { if ($pos+1 < strlen($this->dataStr)) { $d = $this->dataStr[$pos+1]; $word = (ord($c) << 8) | ord($d); if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) { return QR_MODE_KJ; } } } return QR_MODE_8B; } /** * eatNum * @return int run */ protected function eatNum() { $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); $p = 0; while($this->isdigitat($this->dataStr, $p)) { $p++; } $run = $p; $mode = $this->identifyMode($p); if ($mode == QR_MODE_8B) { $dif = $this->estimateBitsModeNum($run) + 4 + $ln + $this->estimateBitsMode8(1) // + 4 + l8 - $this->estimateBitsMode8($run + 1); // - 4 - l8 if ($dif > 0) { return $this->eat8(); } } if ($mode == QR_MODE_AN) { $dif = $this->estimateBitsModeNum($run) + 4 + $ln + $this->estimateBitsModeAn(1) // + 4 + la - $this->estimateBitsModeAn($run + 1);// - 4 - la if ($dif > 0) { return $this->eatAn(); } } $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr)); return $run; } /** * eatAn * @return int run */ protected function eatAn() { $la = $this->lengthIndicator(QR_MODE_AN, $this->version); $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); $p = 0; while($this->isalnumat($this->dataStr, $p)) { if ($this->isdigitat($this->dataStr, $p)) { $q = $p; while($this->isdigitat($this->dataStr, $q)) { $q++; } $dif = $this->estimateBitsModeAn($p) // + 4 + la + $this->estimateBitsModeNum($q - $p) + 4 + $ln - $this->estimateBitsModeAn($q); // - 4 - la if ($dif < 0) { break; } else { $p = $q; } } else { $p++; } } $run = $p; if (!$this->isalnumat($this->dataStr, $p)) { $dif = $this->estimateBitsModeAn($run) + 4 + $la + $this->estimateBitsMode8(1) // + 4 + l8 - $this->estimateBitsMode8($run + 1); // - 4 - l8 if ($dif > 0) { return $this->eat8(); } } $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr)); return $run; } /** * eatKanji * @return int run */ protected function eatKanji() { $p = 0; while($this->identifyMode($p) == QR_MODE_KJ) { $p += 2; } $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr)); return $run; } /** * eat8 * @return int run */ protected function eat8() { $la = $this->lengthIndicator(QR_MODE_AN, $this->version); $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); $p = 1; $dataStrLen = strlen($this->dataStr); while($p < $dataStrLen) { $mode = $this->identifyMode($p); if ($mode == QR_MODE_KJ) { break; } if ($mode == QR_MODE_NM) { $q = $p; while($this->isdigitat($this->dataStr, $q)) { $q++; } $dif = $this->estimateBitsMode8($p) // + 4 + l8 + $this->estimateBitsModeNum($q - $p) + 4 + $ln - $this->estimateBitsMode8($q); // - 4 - l8 if ($dif < 0) { break; } else { $p = $q; } } elseif ($mode == QR_MODE_AN) { $q = $p; while($this->isalnumat($this->dataStr, $q)) { $q++; } $dif = $this->estimateBitsMode8($p) // + 4 + l8 + $this->estimateBitsModeAn($q - $p) + 4 + $la - $this->estimateBitsMode8($q); // - 4 - l8 if ($dif < 0) { break; } else { $p = $q; } } else { $p++; } } $run = $p; $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr)); return $run; } /** * splitString */ protected function splitString() { while (strlen($this->dataStr) > 0) { if ($this->dataStr == '') { return 0; } $mode = $this->identifyMode(0); switch ($mode) { case QR_MODE_NM: { $length = $this->eatNum(); break; } case QR_MODE_AN: { $length = $this->eatAn(); break; } case QR_MODE_KJ: { if ($hint == QR_MODE_KJ) { $length = $this->eatKanji(); } else { $length = $this->eat8(); } break; } default: { $length = $this->eat8(); break; } } if ($length == 0) { return 0; } if ($length < 0) { return -1; } $this->dataStr = substr($this->dataStr, $length); } } /** * toUpper */ protected function toUpper() { $stringLen = strlen($this->dataStr); $p = 0; while ($p < $stringLen) { $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint); if ($mode == QR_MODE_KJ) { $p += 2; } else { if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) { $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32); } $p++; } } return $this->dataStr; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRinputItem /** * newInputItem * @param int $mode * @param int $size * @param array $data * @param array $bstream * @return array input item */ protected function newInputItem($mode, $size, $data, $bstream=null) { $setData = array_slice($data, 0, $size); if (count($setData) < $size) { $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0)); } if (!$this->check($mode, $size, $setData)) { return NULL; } $inputitem = array(); $inputitem['mode'] = $mode; $inputitem['size'] = $size; $inputitem['data'] = $setData; $inputitem['bstream'] = $bstream; return $inputitem; } /** * encodeModeNum * @param array $inputitem * @param int $version * @return array input item */ protected function encodeModeNum($inputitem, $version) { $words = (int)($inputitem['size'] / 3); $inputitem['bstream'] = array(); $val = 0x1; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']); for ($i=0; $i < $words; ++$i) { $val = (ord($inputitem['data'][$i*3 ]) - ord('0')) * 100; $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10; $val += (ord($inputitem['data'][$i*3+2]) - ord('0')); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val); } if ($inputitem['size'] - $words * 3 == 1) { $val = ord($inputitem['data'][$words*3]) - ord('0'); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val); } elseif (($inputitem['size'] - ($words * 3)) == 2) { $val = (ord($inputitem['data'][$words*3 ]) - ord('0')) * 10; $val += (ord($inputitem['data'][$words*3+1]) - ord('0')); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val); } return $inputitem; } /** * encodeModeAn * @param array $inputitem * @param int $version * @return array input item */ protected function encodeModeAn($inputitem, $version) { $words = (int)($inputitem['size'] / 2); $inputitem['bstream'] = array(); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']); for ($i=0; $i < $words; ++$i) { $val = (int)$this->lookAnTable(ord($inputitem['data'][$i*2 ])) * 45; $val += (int)$this->lookAnTable(ord($inputitem['data'][$i*2+1])); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val); } if ($inputitem['size'] & 1) { $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)])); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val); } return $inputitem; } /** * encodeMode8 * @param array $inputitem * @param int $version * @return array input item */ protected function encodeMode8($inputitem, $version) { $inputitem['bstream'] = array(); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']); for ($i=0; $i < $inputitem['size']; ++$i) { $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i])); } return $inputitem; } /** * encodeModeKanji * @param array $inputitem * @param int $version * @return array input item */ protected function encodeModeKanji($inputitem, $version) { $inputitem['bstream'] = array(); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2)); for ($i=0; $i<$inputitem['size']; $i+=2) { $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]); if ($val <= 0x9ffc) { $val -= 0x8140; } else { $val -= 0xc140; } $h = ($val >> 8) * 0xc0; $val = ($val & 0xff) + $h; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val); } return $inputitem; } /** * encodeModeStructure * @param array $inputitem * @return array input item */ protected function encodeModeStructure($inputitem) { $inputitem['bstream'] = array(); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2])); return $inputitem; } /** * encodeBitStream * @param array $inputitem * @param int $version * @return array input item */ protected function encodeBitStream($inputitem, $version) { $inputitem['bstream'] = array(); $words = $this->maximumWords($inputitem['mode'], $version); if ($inputitem['size'] > $words) { $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']); $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words)); $st1 = $this->encodeBitStream($st1, $version); $st2 = $this->encodeBitStream($st2, $version); $inputitem['bstream'] = array(); $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']); $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']); } else { switch($inputitem['mode']) { case QR_MODE_NM: { $inputitem = $this->encodeModeNum($inputitem, $version); break; } case QR_MODE_AN: { $inputitem = $this->encodeModeAn($inputitem, $version); break; } case QR_MODE_8B: { $inputitem = $this->encodeMode8($inputitem, $version); break; } case QR_MODE_KJ: { $inputitem = $this->encodeModeKanji($inputitem, $version); break; } case QR_MODE_ST: { $inputitem = $this->encodeModeStructure($inputitem); break; } default: { break; } } } return $inputitem; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRinput /** * Append data to an input object. * The data is copied and appended to the input object. * @param array items input items * @param int $mode encoding mode. * @param int $size size of data (byte). * @param array $data array of input data. * @return items * */ protected function appendNewInputItem($items, $mode, $size, $data) { $items[] = $this->newInputItem($mode, $size, $data); return $items; } /** * insertStructuredAppendHeader * @param array $items * @param int $size * @param int $index * @param int $parity * @return array items */ protected function insertStructuredAppendHeader($items, $size, $index, $parity) { if ($size > MAX_STRUCTURED_SYMBOLS) { return -1; } if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) { return -1; } $buf = array($size, $index, $parity); $entry = $this->newInputItem(QR_MODE_ST, 3, buf); array_unshift($items, $entry); return $items; } /** * calcParity * @param array $items * @return int parity */ protected function calcParity($items) { $parity = 0; foreach ($items as $item) { if ($item['mode'] != QR_MODE_ST) { for ($i=$item['size']-1; $i>=0; --$i) { $parity ^= $item['data'][$i]; } } } return $parity; } /** * checkModeNum * @param int $size * @param array $data * @return boolean true or false */ protected function checkModeNum($size, $data) { for ($i=0; $i<$size; ++$i) { if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){ return false; } } return true; } /** * estimateBitsModeNum * @param int $size * @return int number of bits */ protected function estimateBitsModeNum($size) { $w = (int)$size / 3; $bits = $w * 10; switch($size - $w * 3) { case 1: { $bits += 4; break; } case 2: { $bits += 7; break; } default: { break; } } return $bits; } /** * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19). * @param int $c character value * @return value */ protected function lookAnTable($c) { return (($c > 127)?-1:$this->anTable[$c]); } /** * checkModeAn * @param int $size * @param array $data * @return boolean true or false */ protected function checkModeAn($size, $data) { for ($i=0; $i<$size; ++$i) { if ($this->lookAnTable(ord($data[$i])) == -1) { return false; } } return true; } /** * estimateBitsModeAn * @param int $size * @return int number of bits */ protected function estimateBitsModeAn($size) { $w = (int)($size / 2); $bits = $w * 11; if ($size & 1) { $bits += 6; } return $bits; } /** * estimateBitsMode8 * @param int $size * @return int number of bits */ protected function estimateBitsMode8($size) { return $size * 8; } /** * estimateBitsModeKanji * @param int $size * @return int number of bits */ protected function estimateBitsModeKanji($size) { return (int)(($size / 2) * 13); } /** * checkModeKanji * @param int $size * @param array $data * @return boolean true or false */ protected function checkModeKanji($size, $data) { if ($size & 1) { return false; } for ($i=0; $i<$size; $i+=2) { $val = (ord($data[$i]) << 8) | ord($data[$i+1]); if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) { return false; } } return true; } /** * Validate the input data. * @param int $mode encoding mode. * @param int $size size of data (byte). * @param array data data to validate * @return boolean true in case of valid data, false otherwise */ protected function check($mode, $size, $data) { if ($size <= 0) { return false; } switch($mode) { case QR_MODE_NM: { return $this->checkModeNum($size, $data); } case QR_MODE_AN: { return $this->checkModeAn($size, $data); } case QR_MODE_KJ: { return $this->checkModeKanji($size, $data); } case QR_MODE_8B: { return true; } case QR_MODE_ST: { return true; } default: { break; } } return false; } /** * estimateBitStreamSize * @param array $items * @param int $version * @return int bits */ protected function estimateBitStreamSize($items, $version) { $bits = 0; if ($version == 0) { $version = 1; } foreach ($items as $item) { switch($item['mode']) { case QR_MODE_NM: { $bits = $this->estimateBitsModeNum($item['size']); break; } case QR_MODE_AN: { $bits = $this->estimateBitsModeAn($item['size']); break; } case QR_MODE_8B: { $bits = $this->estimateBitsMode8($item['size']); break; } case QR_MODE_KJ: { $bits = $this->estimateBitsModeKanji($item['size']); break; } case QR_MODE_ST: { return STRUCTURE_HEADER_BITS; } default: { return 0; } } $l = $this->lengthIndicator($item['mode'], $version); $m = 1 << $l; $num = (int)(($item['size'] + $m - 1) / $m); $bits += $num * (4 + $l); } return $bits; } /** * estimateVersion * @param array $items * @return int version */ protected function estimateVersion($items) { $version = 0; $prev = 0; do { $prev = $version; $bits = $this->estimateBitStreamSize($items, $prev); $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level); if ($version < 0) { return -1; } } while ($version > $prev); return $version; } /** * lengthOfCode * @param int $mode * @param int $version * @param int $bits * @return int size */ protected function lengthOfCode($mode, $version, $bits) { $payload = $bits - 4 - $this->lengthIndicator($mode, $version); switch($mode) { case QR_MODE_NM: { $chunks = (int)($payload / 10); $remain = $payload - $chunks * 10; $size = $chunks * 3; if ($remain >= 7) { $size += 2; } elseif ($remain >= 4) { $size += 1; } break; } case QR_MODE_AN: { $chunks = (int)($payload / 11); $remain = $payload - $chunks * 11; $size = $chunks * 2; if ($remain >= 6) { ++$size; } break; } case QR_MODE_8B: { $size = (int)($payload / 8); break; } case QR_MODE_KJ: { $size = (int)(($payload / 13) * 2); break; } case QR_MODE_ST: { $size = (int)($payload / 8); break; } default: { $size = 0; break; } } $maxsize = $this->maximumWords($mode, $version); if ($size < 0) { $size = 0; } if ($size > $maxsize) { $size = $maxsize; } return $size; } /** * createBitStream * @param array $items * @return array of items and total bits */ protected function createBitStream($items) { $total = 0; foreach ($items as $key => $item) { $items[$key] = $this->encodeBitStream($item, $this->version); $bits = count($items[$key]['bstream']); $total += $bits; } return array($items, $total); } /** * convertData * @param array $items * @return array items */ protected function convertData($items) { $ver = $this->estimateVersion($items); if ($ver > $this->version) { $this->version = $ver; } for (;;) { $cbs = $this->createBitStream($items); $items = $cbs[0]; $bits = $cbs[1]; if ($bits < 0) { return -1; } $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level); if ($ver < 0) { return -1; } elseif ($ver > $this->version) { $this->version = $ver; } else { break; } } return $items; } /** * Append Padding Bit to bitstream * @param array $bstream * @return array bitstream */ protected function appendPaddingBit($bstream) { if (is_null($bstream)) { return null; } $bits = count($bstream); $maxwords = $this->getDataLength($this->version, $this->level); $maxbits = $maxwords * 8; if ($maxbits == $bits) { return 0; } if ($maxbits - $bits < 5) { return $this->appendNum($bstream, $maxbits - $bits, 0); } $bits += 4; $words = (int)(($bits + 7) / 8); $padding = array(); $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0); $padlen = $maxwords - $words; if ($padlen > 0) { $padbuf = array(); for ($i=0; $i<$padlen; ++$i) { $padbuf[$i] = ($i&1)?0x11:0xec; } $padding = $this->appendBytes($padding, $padlen, $padbuf); } return $this->appendBitstream($bstream, $padding); } /** * mergeBitStream * @param array $bstream * @return array bitstream */ protected function mergeBitStream($items) { $items = $this->convertData($items); if (!is_array($items)) { return null; } $bstream = array(); foreach ($items as $item) { $bstream = $this->appendBitstream($bstream, $item['bstream']); } return $bstream; } /** * Returns a stream of bits. * @param int $items * @return array padded merged byte stream */ protected function getBitStream($items) { $bstream = $this->mergeBitStream($items); return $this->appendPaddingBit($bstream); } /** * Pack all bit streams padding bits into a byte array. * @param int $items * @return array padded merged byte stream */ protected function getByteStream($items) { $bstream = $this->getBitStream($items); return $this->bitstreamToByte($bstream); } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRbitstream /** * Return an array with zeros * @param int $setLength array size * @return array */ protected function allocate($setLength) { return array_fill(0, $setLength, 0); } /** * Return new bitstream from number * @param int $bits number of bits * @param int $num number * @return array bitstream */ protected function newFromNum($bits, $num) { $bstream = $this->allocate($bits); $mask = 1 << ($bits - 1); for ($i=0; $i<$bits; ++$i) { if ($num & $mask) { $bstream[$i] = 1; } else { $bstream[$i] = 0; } $mask = $mask >> 1; } return $bstream; } /** * Return new bitstream from bytes * @param int $size size * @param array $data bytes * @return array bitstream */ protected function newFromBytes($size, $data) { $bstream = $this->allocate($size * 8); $p=0; for ($i=0; $i<$size; ++$i) { $mask = 0x80; for ($j=0; $j<8; ++$j) { if ($data[$i] & $mask) { $bstream[$p] = 1; } else { $bstream[$p] = 0; } $p++; $mask = $mask >> 1; } } return $bstream; } /** * Append one bitstream to another * @param array $bitstream original bitstream * @param array $append bitstream to append * @return array bitstream */ protected function appendBitstream($bitstream, $append) { if ((!is_array($append)) OR (count($append) == 0)) { return $bitstream; } if (count($bitstream) == 0) { return $append; } return array_values(array_merge($bitstream, $append)); } /** * Append one bitstream created from number to another * @param array $bitstream original bitstream * @param int $bits number of bits * @param int $num number * @return array bitstream */ protected function appendNum($bitstream, $bits, $num) { if ($bits == 0) { return 0; } $b = $this->newFromNum($bits, $num); return $this->appendBitstream($bitstream, $b); } /** * Append one bitstream created from bytes to another * @param array $bitstream original bitstream * @param int $size size * @param array $data bytes * @return array bitstream */ protected function appendBytes($bitstream, $size, $data) { if ($size == 0) { return 0; } $b = $this->newFromBytes($size, $data); return $this->appendBitstream($bitstream, $b); } /** * Convert bitstream to bytes * @param array $bitstream original bitstream * @return array of bytes */ protected function bitstreamToByte($bstream) { if (is_null($bstream)) { return null; } $size = count($bstream); if ($size == 0) { return array(); } $data = array_fill(0, (int)(($size + 7) / 8), 0); $bytes = (int)($size / 8); $p = 0; for ($i=0; $i<$bytes; $i++) { $v = 0; for ($j=0; $j<8; $j++) { $v = $v << 1; $v |= $bstream[$p]; $p++; } $data[$i] = $v; } if ($size & 7) { $v = 0; for ($j=0; $j<($size & 7); $j++) { $v = $v << 1; $v |= $bstream[$p]; $p++; } $data[$bytes] = $v; } return $data; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRspec /** * Replace a value on the array at the specified position * @param array $srctab * @param int $x X position * @param int $y Y position * @param string $repl value to replace * @param int $replLen length of the repl string * @return array srctab */ protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) { $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl)); return $srctab; } /** * Return maximum data code length (bytes) for the version. * @param int $version version * @param int $level error correction level * @return int maximum size (bytes) */ protected function getDataLength($version, $level) { return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level]; } /** * Return maximum error correction code length (bytes) for the version. * @param int $version version * @param int $level error correction level * @return int ECC size (bytes) */ protected function getECCLength($version, $level){ return $this->capacity[$version][QRCAP_EC][$level]; } /** * Return the width of the symbol for the version. * @param int $version version * @return int width */ protected function getWidth($version) { return $this->capacity[$version][QRCAP_WIDTH]; } /** * Return the numer of remainder bits. * @param int $version version * @return int number of remainder bits */ protected function getRemainder($version) { return $this->capacity[$version][QRCAP_REMINDER]; } /** * Return a version number that satisfies the input code length. * @param int $size input code length (byte) * @param int $level error correction level * @return int version number */ protected function getMinimumVersion($size, $level) { for ($i=1; $i <= QRSPEC_VERSION_MAX; ++$i) { $words = $this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]; if ($words >= $size) { return $i; } } return -1; } /** * Return the size of length indicator for the mode and version. * @param int $mode encoding mode * @param int $version version * @return int the size of the appropriate length indicator (bits). */ protected function lengthIndicator($mode, $version) { if ($mode == QR_MODE_ST) { return 0; } if ($version <= 9) { $l = 0; } elseif ($version <= 26) { $l = 1; } else { $l = 2; } return $this->lengthTableBits[$mode][$l]; } /** * Return the maximum length for the mode and version. * @param int $mode encoding mode * @param int $version version * @return int the maximum length (bytes) */ protected function maximumWords($mode, $version) { if ($mode == QR_MODE_ST) { return 3; } if ($version <= 9) { $l = 0; } else if ($version <= 26) { $l = 1; } else { $l = 2; } $bits = $this->lengthTableBits[$mode][$l]; $words = (1 << $bits) - 1; if ($mode == QR_MODE_KJ) { $words *= 2; // the number of bytes is required } return $words; } /** * Return an array of ECC specification. * @param int $version version * @param int $level error correction level * @param array $spec an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code} * @return array spec */ protected function getEccSpec($version, $level, $spec) { if (count($spec) < 5) { $spec = array(0, 0, 0, 0, 0); } $b1 = $this->eccTable[$version][$level][0]; $b2 = $this->eccTable[$version][$level][1]; $data = $this->getDataLength($version, $level); $ecc = $this->getECCLength($version, $level); if ($b2 == 0) { $spec[0] = $b1; $spec[1] = (int)($data / $b1); $spec[2] = (int)($ecc / $b1); $spec[3] = 0; $spec[4] = 0; } else { $spec[0] = $b1; $spec[1] = (int)($data / ($b1 + $b2)); $spec[2] = (int)($ecc / ($b1 + $b2)); $spec[3] = $b2; $spec[4] = $spec[1] + 1; } return $spec; } /** * Put an alignment marker. * @param array $frame frame * @param int $width width * @param int $ox X center coordinate of the pattern * @param int $oy Y center coordinate of the pattern * @return array frame */ protected function putAlignmentMarker($frame, $ox, $oy) { $finder = array( "\xa1\xa1\xa1\xa1\xa1", "\xa1\xa0\xa0\xa0\xa1", "\xa1\xa0\xa1\xa0\xa1", "\xa1\xa0\xa0\xa0\xa1", "\xa1\xa1\xa1\xa1\xa1" ); $yStart = $oy - 2; $xStart = $ox - 2; for ($y=0; $y < 5; $y++) { $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]); } return $frame; } /** * Put an alignment pattern. * @param int $version version * @param array $fram frame * @param int $width width * @return array frame */ protected function putAlignmentPattern($version, $frame, $width) { if ($version < 2) { return $frame; } $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0]; if ($d < 0) { $w = 2; } else { $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2); } if ($w * $w - 3 == 1) { $x = $this->alignmentPattern[$version][0]; $y = $this->alignmentPattern[$version][0]; $frame = $this->putAlignmentMarker($frame, $x, $y); return $frame; } $cx = $this->alignmentPattern[$version][0]; $wo = $w - 1; for ($x=1; $x < $wo; ++$x) { $frame = $this->putAlignmentMarker($frame, 6, $cx); $frame = $this->putAlignmentMarker($frame, $cx, 6); $cx += $d; } $cy = $this->alignmentPattern[$version][0]; for ($y=0; $y < $wo; ++$y) { $cx = $this->alignmentPattern[$version][0]; for ($x=0; $x < $wo; ++$x) { $frame = $this->putAlignmentMarker($frame, $cx, $cy); $cx += $d; } $cy += $d; } return $frame; } /** * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits. * @param int $version version * @return BCH encoded version information pattern */ protected function getVersionPattern($version) { if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) { return 0; } return $this->versionPattern[($version - 7)]; } /** * Return BCH encoded format information pattern. * @param array $mask * @param int $level error correction level * @return BCH encoded format information pattern */ protected function getFormatInfo($mask, $level) { if (($mask < 0) OR ($mask > 7)) { return 0; } if (($level < 0) OR ($level > 3)) { return 0; } return $this->formatInfo[$level][$mask]; } /** * Put a finder pattern. * @param array $frame frame * @param int $width width * @param int $ox X center coordinate of the pattern * @param int $oy Y center coordinate of the pattern * @return array frame */ protected function putFinderPattern($frame, $ox, $oy) { $finder = array( "\xc1\xc1\xc1\xc1\xc1\xc1\xc1", "\xc1\xc0\xc0\xc0\xc0\xc0\xc1", "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", "\xc1\xc0\xc0\xc0\xc0\xc0\xc1", "\xc1\xc1\xc1\xc1\xc1\xc1\xc1" ); for ($y=0; $y < 7; $y++) { $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]); } return $frame; } /** * Return a copy of initialized frame. * @param int $version version * @return Array of unsigned char. */ protected function createFrame($version) { $width = $this->capacity[$version][QRCAP_WIDTH]; $frameLine = str_repeat ("\0", $width); $frame = array_fill(0, $width, $frameLine); // Finder pattern $frame = $this->putFinderPattern($frame, 0, 0); $frame = $this->putFinderPattern($frame, $width - 7, 0); $frame = $this->putFinderPattern($frame, 0, $width - 7); // Separator $yOffset = $width - 7; for ($y=0; $y < 7; ++$y) { $frame[$y][7] = "\xc0"; $frame[$y][$width - 8] = "\xc0"; $frame[$yOffset][7] = "\xc0"; ++$yOffset; } $setPattern = str_repeat("\xc0", 8); $frame = $this->qrstrset($frame, 0, 7, $setPattern); $frame = $this->qrstrset($frame, $width-8, 7, $setPattern); $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern); // Format info $setPattern = str_repeat("\x84", 9); $frame = $this->qrstrset($frame, 0, 8, $setPattern); $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8); $yOffset = $width - 8; for ($y=0; $y < 8; ++$y,++$yOffset) { $frame[$y][8] = "\x84"; $frame[$yOffset][8] = "\x84"; } // Timing pattern $wo = $width - 15; for ($i=1; $i < $wo; ++$i) { $frame[6][7+$i] = chr(0x90 | ($i & 1)); $frame[7+$i][6] = chr(0x90 | ($i & 1)); } // Alignment pattern $frame = $this->putAlignmentPattern($version, $frame, $width); // Version information if ($version >= 7) { $vinf = $this->getVersionPattern($version); $v = $vinf; for ($x=0; $x<6; ++$x) { for ($y=0; $y<3; ++$y) { $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1)); $v = $v >> 1; } } $v = $vinf; for ($y=0; $y<6; ++$y) { for ($x=0; $x<3; ++$x) { $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1)); $v = $v >> 1; } } } // and a little bit... $frame[$width - 8][8] = "\x81"; return $frame; } /** * Set new frame for the specified version. * @param int $version version * @return Array of unsigned char. */ protected function newFrame($version) { if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) { return NULL; } if (!isset($this->frames[$version])) { $this->frames[$version] = $this->createFrame($version); } if (is_null($this->frames[$version])) { return NULL; } return $this->frames[$version]; } /** * Return block number 0 * @param array $spec * @return int value */ protected function rsBlockNum($spec) { return ($spec[0] + $spec[3]); } /** * Return block number 1 * @param array $spec * @return int value */ protected function rsBlockNum1($spec) { return $spec[0]; } /** * Return data codes 1 * @param array $spec * @return int value */ protected function rsDataCodes1($spec) { return $spec[1]; } /** * Return ecc codes 1 * @param array $spec * @return int value */ protected function rsEccCodes1($spec) { return $spec[2]; } /** * Return block number 2 * @param array $spec * @return int value */ protected function rsBlockNum2($spec) { return $spec[3]; } /** * Return data codes 2 * @param array $spec * @return int value */ protected function rsDataCodes2($spec) { return $spec[4]; } /** * Return ecc codes 2 * @param array $spec * @return int value */ protected function rsEccCodes2($spec) { return $spec[2]; } /** * Return data length * @param array $spec * @return int value */ protected function rsDataLength($spec) { return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); } /** * Return ecc length * @param array $spec * @return int value */ protected function rsEccLength($spec) { return ($spec[0] + $spec[3]) * $spec[2]; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRrs /** * Initialize a Reed-Solomon codec and add it to existing rsitems * @param int $symsize symbol size, bits * @param int $gfpoly Field generator polynomial coefficients * @param int $fcr first root of RS code generator polynomial, index form * @param int $prim primitive element to generate polynomial roots * @param int $nroots RS code generator polynomial degree (number of roots) * @param int $pad padding bytes at front of shortened block * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>. */ protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) { foreach ($this->rsitems as $rs) { if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize) OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) { continue; } return $rs; } $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad); array_unshift($this->rsitems, $rs); return $rs; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRrsItem /** * modnn * @param array RS values * @param int $x X position * @return int X osition */ protected function modnn($rs, $x) { while ($x >= $rs['nn']) { $x -= $rs['nn']; $x = ($x >> $rs['mm']) + ($x & $rs['nn']); } return $x; } /** * Initialize a Reed-Solomon codec and returns an array of values. * @param int $symsize symbol size, bits * @param int $gfpoly Field generator polynomial coefficients * @param int $fcr first root of RS code generator polynomial, index form * @param int $prim primitive element to generate polynomial roots * @param int $nroots RS code generator polynomial degree (number of roots) * @param int $pad padding bytes at front of shortened block * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>. */ protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) { // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2) $rs = null; // Check parameter ranges if (($symsize < 0) OR ($symsize > 8)) { return $rs; } if (($fcr < 0) OR ($fcr >= (1<<$symsize))) { return $rs; } if (($prim <= 0) OR ($prim >= (1<<$symsize))) { return $rs; } if (($nroots < 0) OR ($nroots >= (1<<$symsize))) { return $rs; } if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) { return $rs; } $rs = array(); $rs['mm'] = $symsize; $rs['nn'] = (1 << $symsize) - 1; $rs['pad'] = $pad; $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0); $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0); // PHP style macro replacement ;) $NN =& $rs['nn']; $A0 =& $NN; // Generate Galois field lookup tables $rs['index_of'][0] = $A0; // log(zero) = -inf $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0 $sr = 1; for ($i=0; $i<$rs['nn']; ++$i) { $rs['index_of'][$sr] = $i; $rs['alpha_to'][$i] = $sr; $sr <<= 1; if ($sr & (1 << $symsize)) { $sr ^= $gfpoly; } $sr &= $rs['nn']; } if ($sr != 1) { // field generator polynomial is not primitive! return NULL; } // Form RS code generator polynomial from its roots $rs['genpoly'] = array_fill(0, ($nroots + 1), 0); $rs['fcr'] = $fcr; $rs['prim'] = $prim; $rs['nroots'] = $nroots; $rs['gfpoly'] = $gfpoly; // Find prim-th root of 1, used in decoding for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) { ; // intentional empty-body loop! } $rs['iprim'] = (int)($iprim / $prim); $rs['genpoly'][0] = 1; for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) { $rs['genpoly'][$i+1] = 1; // Multiply rs->genpoly[] by @**(root + x) for ($j = $i; $j > 0; --$j) { if ($rs['genpoly'][$j] != 0) { $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)]; } else { $rs['genpoly'][$j] = $rs['genpoly'][$j-1]; } } // rs->genpoly[0] can never be zero $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)]; } // convert rs->genpoly[] to index form for quicker encoding for ($i = 0; $i <= $nroots; ++$i) { $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]]; } return $rs; } /** * Encode a Reed-Solomon codec and returns the parity array * @param array $rs RS values * @param array $data data * @param array $parity parity * @return parity array */ protected function encode_rs_char($rs, $data, $parity) { $MM =& $rs['mm']; // bits per symbol $NN =& $rs['nn']; // the total number of symbols in a RS block $ALPHA_TO =& $rs['alpha_to']; // the address of an array of NN elements to convert Galois field elements in index (log) form to polynomial form $INDEX_OF =& $rs['index_of']; // the address of an array of NN elements to convert Galois field elements in polynomial form to index (log) form $GENPOLY =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form $NROOTS =& $rs['nroots']; // the number of roots in the RS code generator polynomial, which is the same as the number of parity symbols in a block $FCR =& $rs['fcr']; // first consecutive root, index form $PRIM =& $rs['prim']; // primitive element, index form $IPRIM =& $rs['iprim']; // prim-th root of 1, index form $PAD =& $rs['pad']; // the number of pad symbols in a block $A0 =& $NN; $parity = array_fill(0, $NROOTS, 0); for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) { $feedback = $INDEX_OF[$data[$i] ^ $parity[0]]; if ($feedback != $A0) { // feedback term is non-zero // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must // always be for the polynomials constructed by init_rs() $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback); for ($j=1; $j < $NROOTS; ++$j) { $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])]; } } // Shift array_shift($parity); if ($feedback != $A0) { array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]); } else { array_push($parity, 0); } } return $parity; } } // end QRcode class } // END OF "class_exists QRcode" //============================================================+ // END OF FILE //============================================================+ Documentation generated on Sun, 27 Feb 2011 16:33:37 -0800 by phpDocumentor 1.4.3