source-class-QRcode

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   1: <?php
   2: //============================================================+
   3: // File name   : qrcode.php
   4: // Version     : 1.0.010
   5: // Begin       : 2010-03-22
   6: // Last Update : 2012-07-25
   7: // Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
   8: // License     : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
   9: // -------------------------------------------------------------------
  10: // Copyright (C) 2010-2012 Nicola Asuni - Tecnick.com LTD
  11: //
  12: // This file is part of TCPDF software library.
  13: //
  14: // TCPDF is free software: you can redistribute it and/or modify it
  15: // under the terms of the GNU Lesser General Public License as
  16: // published by the Free Software Foundation, either version 3 of the
  17: // License, or (at your option) any later version.
  18: //
  19: // TCPDF is distributed in the hope that it will be useful, but
  20: // WITHOUT ANY WARRANTY; without even the implied warranty of
  21: // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  22: // See the GNU Lesser General Public License for more details.
  23: //
  24: // You should have received a copy of the GNU Lesser General Public License
  25: // along with TCPDF.  If not, see <http://www.gnu.org/licenses/>.
  26: //
  27: // See LICENSE.TXT file for more information.
  28: // -------------------------------------------------------------------
  29: //
  30: // DESCRIPTION :
  31: //
  32: // Class to create QR-code arrays for TCPDF class.
  33: // QR Code symbol is a 2D barcode that can be scanned by
  34: // handy terminals such as a mobile phone with CCD.
  35: // The capacity of QR Code is up to 7000 digits or 4000
  36: // characters, and has high robustness.
  37: // This class supports QR Code model 2, described in
  38: // JIS (Japanese Industrial Standards) X0510:2004
  39: // or ISO/IEC 18004.
  40: // Currently the following features are not supported:
  41: // ECI and FNC1 mode, Micro QR Code, QR Code model 1,
  42: // Structured mode.
  43: //
  44: // This class is derived from the following projects:
  45: // ---------------------------------------------------------
  46: // "PHP QR Code encoder"
  47: // License: GNU-LGPLv3
  48: // Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
  49: // http://phpqrcode.sourceforge.net/
  50: // https://sourceforge.net/projects/phpqrcode/
  51: //
  52: // The "PHP QR Code encoder" is based on
  53: // "C libqrencode library" (ver. 3.1.1)
  54: // License: GNU-LGPL 2.1
  55: // Copyright (C) 2006-2010 by Kentaro Fukuchi
  56: // http://megaui.net/fukuchi/works/qrencode/index.en.html
  57: //
  58: // Reed-Solomon code encoder is written by Phil Karn, KA9Q.
  59: // Copyright (C) 2002-2006 Phil Karn, KA9Q
  60: //
  61: // QR Code is registered trademark of DENSO WAVE INCORPORATED
  62: // http://www.denso-wave.com/qrcode/index-e.html
  63: // ---------------------------------------------------------
  64: //============================================================+
  65: 
  66: /**
  67:  * @file
  68:  * Class to create QR-code arrays for TCPDF class.
  69:  * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
  70:  * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
  71:  * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
  72:  * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
  73:  *
  74:  * 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).
  75:  * Please read comments on this class source file for full copyright and license information.
  76:  *
  77:  * @package com.tecnick.tcpdf
  78:  * @author Nicola Asuni
  79:  * @version 1.0.010
  80:  */
  81: 
  82: // definitions
  83: if (!defined('QRCODEDEFS')) {
  84: 
  85:     /**
  86:      * Indicate that definitions for this class are set
  87:      */
  88:     define('QRCODEDEFS', true);
  89: 
  90:     // -----------------------------------------------------
  91: 
  92:     // Encoding modes (characters which can be encoded in QRcode)
  93: 
  94:     /**
  95:      * Encoding mode
  96:      */
  97:     define('QR_MODE_NL', -1);
  98: 
  99:     /**
 100:      * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.
 101:      */
 102:     define('QR_MODE_NM', 0);
 103: 
 104:     /**
 105:      * 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.
 106:      */
 107:     define('QR_MODE_AN', 1);
 108: 
 109:     /**
 110:      * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.
 111:      */
 112:     define('QR_MODE_8B', 2);
 113: 
 114:     /**
 115:      * 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.
 116:      */
 117:     define('QR_MODE_KJ', 3);
 118: 
 119:     /**
 120:      * Encoding mode STRUCTURED (currently unsupported)
 121:      */
 122:     define('QR_MODE_ST', 4);
 123: 
 124:     // -----------------------------------------------------
 125: 
 126:     // Levels of error correction.
 127:     // QRcode has a function of an error correcting for miss reading that white is black.
 128:     // Error correcting is defined in 4 level as below.
 129: 
 130:     /**
 131:      * Error correction level L : About 7% or less errors can be corrected.
 132:      */
 133:     define('QR_ECLEVEL_L', 0);
 134: 
 135:     /**
 136:      * Error correction level M : About 15% or less errors can be corrected.
 137:      */
 138:     define('QR_ECLEVEL_M', 1);
 139: 
 140:     /**
 141:      * Error correction level Q : About 25% or less errors can be corrected.
 142:      */
 143:     define('QR_ECLEVEL_Q', 2);
 144: 
 145:     /**
 146:      * Error correction level H : About 30% or less errors can be corrected.
 147:      */
 148:     define('QR_ECLEVEL_H', 3);
 149: 
 150:     // -----------------------------------------------------
 151: 
 152:     // Version. Size of QRcode is defined as version.
 153:     // Version is from 1 to 40.
 154:     // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases.
 155:     // So version 40 is 177*177 matrix.
 156: 
 157:     /**
 158:      * Maximum QR Code version.
 159:      */
 160:     define('QRSPEC_VERSION_MAX', 40);
 161: 
 162:     /**
 163:      * Maximum matrix size for maximum version (version 40 is 177*177 matrix).
 164:      */
 165:     define('QRSPEC_WIDTH_MAX', 177);
 166: 
 167:     // -----------------------------------------------------
 168: 
 169:     /**
 170:      * Matrix index to get width from $capacity array.
 171:      */
 172:     define('QRCAP_WIDTH',    0);
 173: 
 174:     /**
 175:      * Matrix index to get number of words from $capacity array.
 176:      */
 177:     define('QRCAP_WORDS',    1);
 178: 
 179:     /**
 180:      * Matrix index to get remainder from $capacity array.
 181:      */
 182:     define('QRCAP_REMINDER', 2);
 183: 
 184:     /**
 185:      * Matrix index to get error correction level from $capacity array.
 186:      */
 187:     define('QRCAP_EC',       3);
 188: 
 189:     // -----------------------------------------------------
 190: 
 191:     // Structure (currently usupported)
 192: 
 193:     /**
 194:      * Number of header bits for structured mode
 195:      */
 196:     define('STRUCTURE_HEADER_BITS',  20);
 197: 
 198:     /**
 199:      * Max number of symbols for structured mode
 200:      */
 201:     define('MAX_STRUCTURED_SYMBOLS', 16);
 202: 
 203:     // -----------------------------------------------------
 204: 
 205:     // Masks
 206: 
 207:     /**
 208:      * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)
 209:      */
 210:     define('N1',  3);
 211: 
 212:     /**
 213:      * Down point base value for case 2 mask pattern (module block of same color)
 214:      */
 215:     define('N2',  3);
 216: 
 217:     /**
 218:      * 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)
 219:      */
 220:     define('N3', 40);
 221: 
 222:     /**
 223:      * Down point base value for case 4 mask pattern (ration of dark modules in whole)
 224:      */
 225:     define('N4', 10);
 226: 
 227:     // -----------------------------------------------------
 228: 
 229:     // Optimization settings
 230: 
 231:     /**
 232:      * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code
 233:      */
 234:     define('QR_FIND_BEST_MASK', true);
 235: 
 236:     /**
 237:      * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly
 238:      */
 239:     define('QR_FIND_FROM_RANDOM', 2);
 240: 
 241:     /**
 242:      * when QR_FIND_BEST_MASK === false
 243:      */
 244:     define('QR_DEFAULT_MASK', 2);
 245: 
 246:     // -----------------------------------------------------
 247: 
 248: } // end of definitions
 249: 
 250: // #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#
 251: 
 252: // for compatibility with PHP4
 253: if (!function_exists('str_split')) {
 254:     /**
 255:      * Convert a string to an array (needed for PHP4 compatibility)
 256:      * @param $string (string) The input string.
 257:      * @param $split_length (int) Maximum length of the chunk.
 258:      * @return  If the optional split_length  parameter is specified, the returned array will be broken down into chunks with each being split_length  in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element.
 259:      */
 260:     function str_split($string, $split_length=1) {
 261:         if ((strlen($string) > $split_length) OR (!$split_length)) {
 262:             do {
 263:                 $c = strlen($string);
 264:                 $parts[] = substr($string, 0, $split_length);
 265:                 $string = substr($string, $split_length);
 266:             } while ($string !== false);
 267:         } else {
 268:             $parts = array($string);
 269:         }
 270:         return $parts;
 271:     }
 272: }
 273: 
 274: // #####################################################
 275: 
 276: /**
 277:  * @class QRcode
 278:  * Class to create QR-code arrays for TCPDF class.
 279:  * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
 280:  * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
 281:  * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
 282:  * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
 283:  *
 284:  * 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).
 285:  * Please read comments on this class source file for full copyright and license information.
 286:  *
 287:  * @package com.tecnick.tcpdf
 288:  * @author Nicola Asuni
 289:  * @version 1.0.010
 290:  */
 291: class QRcode {
 292: 
 293:     /**
 294:      * Barcode array to be returned which is readable by TCPDF.
 295:      * @protected
 296:      */
 297:     protected $barcode_array = array();
 298: 
 299:     /**
 300:      * 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.
 301:      * @protected
 302:      */
 303:     protected $version = 0;
 304: 
 305:     /**
 306:      * Levels of error correction. See definitions for possible values.
 307:      * @protected
 308:      */
 309:     protected $level = QR_ECLEVEL_L;
 310: 
 311:     /**
 312:      * Encoding mode.
 313:      * @protected
 314:      */
 315:     protected $hint = QR_MODE_8B;
 316: 
 317:     /**
 318:      * Boolean flag, if true the input string will be converted to uppercase.
 319:      * @protected
 320:      */
 321:     protected $casesensitive = true;
 322: 
 323:     /**
 324:      * Structured QR code (not supported yet).
 325:      * @protected
 326:      */
 327:     protected $structured = 0;
 328: 
 329:     /**
 330:      * Mask data.
 331:      * @protected
 332:      */
 333:     protected $data;
 334: 
 335:     // FrameFiller
 336: 
 337:     /**
 338:      * Width.
 339:      * @protected
 340:      */
 341:     protected $width;
 342: 
 343:     /**
 344:      * Frame.
 345:      * @protected
 346:      */
 347:     protected $frame;
 348: 
 349:     /**
 350:      * X position of bit.
 351:      * @protected
 352:      */
 353:     protected $x;
 354: 
 355:     /**
 356:      * Y position of bit.
 357:      * @protected
 358:      */
 359:     protected $y;
 360: 
 361:     /**
 362:      * Direction.
 363:      * @protected
 364:      */
 365:     protected $dir;
 366: 
 367:     /**
 368:      * Single bit value.
 369:      * @protected
 370:      */
 371:     protected $bit;
 372: 
 373:     // ---- QRrawcode ----
 374: 
 375:     /**
 376:      * Data code.
 377:      * @protected
 378:      */
 379:     protected $datacode = array();
 380: 
 381:     /**
 382:      * Error correction code.
 383:      * @protected
 384:      */
 385:     protected $ecccode = array();
 386: 
 387:     /**
 388:      * Blocks.
 389:      * @protected
 390:      */
 391:     protected $blocks;
 392: 
 393:     /**
 394:      * Reed-Solomon blocks.
 395:      * @protected
 396:      */
 397:     protected $rsblocks = array(); //of RSblock
 398: 
 399:     /**
 400:      * Counter.
 401:      * @protected
 402:      */
 403:     protected $count;
 404: 
 405:     /**
 406:      * Data length.
 407:      * @protected
 408:      */
 409:     protected $dataLength;
 410: 
 411:     /**
 412:      * Error correction length.
 413:      * @protected
 414:      */
 415:     protected $eccLength;
 416: 
 417:     /**
 418:      * Value b1.
 419:      * @protected
 420:      */
 421:     protected $b1;
 422: 
 423:     // ---- QRmask ----
 424: 
 425:     /**
 426:      * Run length.
 427:      * @protected
 428:      */
 429:     protected $runLength = array();
 430: 
 431:     // ---- QRsplit ----
 432: 
 433:     /**
 434:      * Input data string.
 435:      * @protected
 436:      */
 437:     protected $dataStr = '';
 438: 
 439:     /**
 440:      * Input items.
 441:      * @protected
 442:      */
 443:     protected $items;
 444: 
 445:     // Reed-Solomon items
 446: 
 447:     /**
 448:      * Reed-Solomon items.
 449:      * @protected
 450:      */
 451:     protected $rsitems = array();
 452: 
 453:     /**
 454:      * Array of frames.
 455:      * @protected
 456:      */
 457:     protected $frames = array();
 458: 
 459:     /**
 460:      * Alphabet-numeric convesion table.
 461:      * @protected
 462:      */
 463:     protected $anTable = array(
 464:         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
 465:         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
 466:         36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, //
 467:          0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 44, -1, -1, -1, -1, -1, //
 468:         -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, //
 469:         25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, //
 470:         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
 471:         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1  //
 472:         );
 473: 
 474:     /**
 475:      * Array Table of the capacity of symbols.
 476:      * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
 477:      * @protected
 478:      */
 479:     protected $capacity = array(
 480:         array(  0,    0, 0, array(   0,    0,    0,    0)), //
 481:         array( 21,   26, 0, array(   7,   10,   13,   17)), //  1
 482:         array( 25,   44, 7, array(  10,   16,   22,   28)), //
 483:         array( 29,   70, 7, array(  15,   26,   36,   44)), //
 484:         array( 33,  100, 7, array(  20,   36,   52,   64)), //
 485:         array( 37,  134, 7, array(  26,   48,   72,   88)), //  5
 486:         array( 41,  172, 7, array(  36,   64,   96,  112)), //
 487:         array( 45,  196, 0, array(  40,   72,  108,  130)), //
 488:         array( 49,  242, 0, array(  48,   88,  132,  156)), //
 489:         array( 53,  292, 0, array(  60,  110,  160,  192)), //
 490:         array( 57,  346, 0, array(  72,  130,  192,  224)), // 10
 491:         array( 61,  404, 0, array(  80,  150,  224,  264)), //
 492:         array( 65,  466, 0, array(  96,  176,  260,  308)), //
 493:         array( 69,  532, 0, array( 104,  198,  288,  352)), //
 494:         array( 73,  581, 3, array( 120,  216,  320,  384)), //
 495:         array( 77,  655, 3, array( 132,  240,  360,  432)), // 15
 496:         array( 81,  733, 3, array( 144,  280,  408,  480)), //
 497:         array( 85,  815, 3, array( 168,  308,  448,  532)), //
 498:         array( 89,  901, 3, array( 180,  338,  504,  588)), //
 499:         array( 93,  991, 3, array( 196,  364,  546,  650)), //
 500:         array( 97, 1085, 3, array( 224,  416,  600,  700)), // 20
 501:         array(101, 1156, 4, array( 224,  442,  644,  750)), //
 502:         array(105, 1258, 4, array( 252,  476,  690,  816)), //
 503:         array(109, 1364, 4, array( 270,  504,  750,  900)), //
 504:         array(113, 1474, 4, array( 300,  560,  810,  960)), //
 505:         array(117, 1588, 4, array( 312,  588,  870, 1050)), // 25
 506:         array(121, 1706, 4, array( 336,  644,  952, 1110)), //
 507:         array(125, 1828, 4, array( 360,  700, 1020, 1200)), //
 508:         array(129, 1921, 3, array( 390,  728, 1050, 1260)), //
 509:         array(133, 2051, 3, array( 420,  784, 1140, 1350)), //
 510:         array(137, 2185, 3, array( 450,  812, 1200, 1440)), // 30
 511:         array(141, 2323, 3, array( 480,  868, 1290, 1530)), //
 512:         array(145, 2465, 3, array( 510,  924, 1350, 1620)), //
 513:         array(149, 2611, 3, array( 540,  980, 1440, 1710)), //
 514:         array(153, 2761, 3, array( 570, 1036, 1530, 1800)), //
 515:         array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35
 516:         array(161, 3034, 0, array( 600, 1120, 1680, 1980)), //
 517:         array(165, 3196, 0, array( 630, 1204, 1770, 2100)), //
 518:         array(169, 3362, 0, array( 660, 1260, 1860, 2220)), //
 519:         array(173, 3532, 0, array( 720, 1316, 1950, 2310)), //
 520:         array(177, 3706, 0, array( 750, 1372, 2040, 2430))  // 40
 521:     );
 522: 
 523:     /**
 524:      * Array Length indicator.
 525:      * @protected
 526:      */
 527:     protected $lengthTableBits = array(
 528:         array(10, 12, 14),
 529:         array( 9, 11, 13),
 530:         array( 8, 16, 16),
 531:         array( 8, 10, 12)
 532:     );
 533: 
 534:     /**
 535:      * Array Table of the error correction code (Reed-Solomon block).
 536:      * See Table 12-16 (pp.30-36), JIS X0510:2004.
 537:      * @protected
 538:      */
 539:     protected $eccTable = array(
 540:         array(array( 0,  0), array( 0,  0), array( 0,  0), array( 0,  0)), //
 541:         array(array( 1,  0), array( 1,  0), array( 1,  0), array( 1,  0)), //  1
 542:         array(array( 1,  0), array( 1,  0), array( 1,  0), array( 1,  0)), //
 543:         array(array( 1,  0), array( 1,  0), array( 2,  0), array( 2,  0)), //
 544:         array(array( 1,  0), array( 2,  0), array( 2,  0), array( 4,  0)), //
 545:         array(array( 1,  0), array( 2,  0), array( 2,  2), array( 2,  2)), //  5
 546:         array(array( 2,  0), array( 4,  0), array( 4,  0), array( 4,  0)), //
 547:         array(array( 2,  0), array( 4,  0), array( 2,  4), array( 4,  1)), //
 548:         array(array( 2,  0), array( 2,  2), array( 4,  2), array( 4,  2)), //
 549:         array(array( 2,  0), array( 3,  2), array( 4,  4), array( 4,  4)), //
 550:         array(array( 2,  2), array( 4,  1), array( 6,  2), array( 6,  2)), // 10
 551:         array(array( 4,  0), array( 1,  4), array( 4,  4), array( 3,  8)), //
 552:         array(array( 2,  2), array( 6,  2), array( 4,  6), array( 7,  4)), //
 553:         array(array( 4,  0), array( 8,  1), array( 8,  4), array(12,  4)), //
 554:         array(array( 3,  1), array( 4,  5), array(11,  5), array(11,  5)), //
 555:         array(array( 5,  1), array( 5,  5), array( 5,  7), array(11,  7)), // 15
 556:         array(array( 5,  1), array( 7,  3), array(15,  2), array( 3, 13)), //
 557:         array(array( 1,  5), array(10,  1), array( 1, 15), array( 2, 17)), //
 558:         array(array( 5,  1), array( 9,  4), array(17,  1), array( 2, 19)), //
 559:         array(array( 3,  4), array( 3, 11), array(17,  4), array( 9, 16)), //
 560:         array(array( 3,  5), array( 3, 13), array(15,  5), array(15, 10)), // 20
 561:         array(array( 4,  4), array(17,  0), array(17,  6), array(19,  6)), //
 562:         array(array( 2,  7), array(17,  0), array( 7, 16), array(34,  0)), //
 563:         array(array( 4,  5), array( 4, 14), array(11, 14), array(16, 14)), //
 564:         array(array( 6,  4), array( 6, 14), array(11, 16), array(30,  2)), //
 565:         array(array( 8,  4), array( 8, 13), array( 7, 22), array(22, 13)), // 25
 566:         array(array(10,  2), array(19,  4), array(28,  6), array(33,  4)), //
 567:         array(array( 8,  4), array(22,  3), array( 8, 26), array(12, 28)), //
 568:         array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), //
 569:         array(array( 7,  7), array(21,  7), array( 1, 37), array(19, 26)), //
 570:         array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30
 571:         array(array(13,  3), array( 2, 29), array(42,  1), array(23, 28)), //
 572:         array(array(17,  0), array(10, 23), array(10, 35), array(19, 35)), //
 573:         array(array(17,  1), array(14, 21), array(29, 19), array(11, 46)), //
 574:         array(array(13,  6), array(14, 23), array(44,  7), array(59,  1)), //
 575:         array(array(12,  7), array(12, 26), array(39, 14), array(22, 41)), // 35
 576:         array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), //
 577:         array(array(17,  4), array(29, 14), array(49, 10), array(24, 46)), //
 578:         array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), //
 579:         array(array(20,  4), array(40,  7), array(43, 22), array(10, 67)), //
 580:         array(array(19,  6), array(18, 31), array(34, 34), array(20, 61))  // 40
 581:     );
 582: 
 583:     /**
 584:      * Array Positions of alignment patterns.
 585:      * 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.
 586:      * See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
 587:      * @protected
 588:      */
 589:     protected $alignmentPattern = array(
 590:         array( 0,  0),
 591:         array( 0,  0), array(18,  0), array(22,  0), array(26,  0), array(30,  0), //  1- 5
 592:         array(34,  0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), //  6-10
 593:         array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15
 594:         array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20
 595:         array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25
 596:         array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30
 597:         array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35
 598:         array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58)  // 35-40
 599:     );
 600: 
 601:     /**
 602:      * Array Version information pattern (BCH coded).
 603:      * See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
 604:      * size: [QRSPEC_VERSION_MAX - 6]
 605:      * @protected
 606:      */
 607:     protected $versionPattern = array(
 608:         0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, //
 609:         0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, //
 610:         0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, //
 611:         0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, //
 612:         0x27541, 0x28c69
 613:     );
 614: 
 615:     /**
 616:      * Array Format information
 617:      * @protected
 618:      */
 619:     protected $formatInfo = array(
 620:         array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), //
 621:         array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), //
 622:         array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), //
 623:         array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)  //
 624:     );
 625: 
 626: 
 627:     // -------------------------------------------------
 628:     // -------------------------------------------------
 629: 
 630: 
 631:     /**
 632:      * This is the class constructor.
 633:      * Creates a QRcode object
 634:      * @param $code (string) code to represent using QRcode
 635:      * @param $eclevel (string) error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul>
 636:      * @public
 637:      * @since 1.0.000
 638:      */
 639:     public function __construct($code, $eclevel = 'L') {
 640:         $barcode_array = array();
 641:         if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
 642:             return false;
 643:         }
 644:         // set error correction level
 645:         $this->level = array_search($eclevel, array('L', 'M', 'Q', 'H'));
 646:         if ($this->level === false) {
 647:             $this->level = QR_ECLEVEL_L;
 648:         }
 649:         if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) {
 650:             return false;
 651:         }
 652:         if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) {
 653:             return false;
 654:         }
 655:         $this->items = array();
 656:         $this->encodeString($code);
 657:         if (is_null($this->data)) {
 658:             return false;
 659:         }
 660:         $qrTab = $this->binarize($this->data);
 661:         $size = count($qrTab);
 662:         $barcode_array['num_rows'] = $size;
 663:         $barcode_array['num_cols'] = $size;
 664:         $barcode_array['bcode'] = array();
 665:         foreach ($qrTab as $line) {
 666:             $arrAdd = array();
 667:             foreach (str_split($line) as $char) {
 668:                 $arrAdd[] = ($char=='1')?1:0;
 669:             }
 670:             $barcode_array['bcode'][] = $arrAdd;
 671:         }
 672:         $this->barcode_array = $barcode_array;
 673:     }
 674: 
 675:     /**
 676:      * Returns a barcode array which is readable by TCPDF
 677:      * @return array barcode array readable by TCPDF;
 678:      * @public
 679:      */
 680:     public function getBarcodeArray() {
 681:         return $this->barcode_array;
 682:     }
 683: 
 684:     /**
 685:      * Convert the frame in binary form
 686:      * @param $frame (array) array to binarize
 687:      * @return array frame in binary form
 688:      */
 689:     protected function binarize($frame) {
 690:         $len = count($frame);
 691:         // the frame is square (width = height)
 692:         foreach ($frame as &$frameLine) {
 693:             for ($i=0; $i<$len; $i++) {
 694:                 $frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0';
 695:             }
 696:         }
 697:         return $frame;
 698:     }
 699: 
 700:     /**
 701:      * Encode the input string to QR code
 702:      * @param $string (string) input string to encode
 703:      */
 704:     protected function encodeString($string) {
 705:         $this->dataStr = $string;
 706:         if (!$this->casesensitive) {
 707:             $this->toUpper();
 708:         }
 709:         $ret = $this->splitString();
 710:         if ($ret < 0) {
 711:             return NULL;
 712:         }
 713:         $this->encodeMask(-1);
 714:     }
 715: 
 716:     /**
 717:      * Encode mask
 718:      * @param $mask (int) masking mode
 719:      */
 720:     protected function encodeMask($mask) {
 721:         $spec = array(0, 0, 0, 0, 0);
 722:         $this->datacode = $this->getByteStream($this->items);
 723: 
 724:         if (is_null($this->datacode)) {
 725:             return NULL;
 726:         }
 727:         $spec = $this->getEccSpec($this->version, $this->level, $spec);
 728:         $this->b1 = $this->rsBlockNum1($spec);
 729:         $this->dataLength = $this->rsDataLength($spec);
 730:         $this->eccLength = $this->rsEccLength($spec);
 731:         $this->ecccode = array_fill(0, $this->eccLength, 0);
 732:         $this->blocks = $this->rsBlockNum($spec);
 733:         $ret = $this->init($spec);
 734:         if ($ret < 0) {
 735:             return NULL;
 736:         }
 737:         $this->count = 0;
 738:         $this->width = $this->getWidth($this->version);
 739:         $this->frame = $this->newFrame($this->version);
 740:         $this->x = $this->width - 1;
 741:         $this->y = $this->width - 1;
 742:         $this->dir = -1;
 743:         $this->bit = -1;
 744:         // inteleaved data and ecc codes
 745:         for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) {
 746:             $code = $this->getCode();
 747:             $bit = 0x80;
 748:             for ($j=0; $j<8; $j++) {
 749:                 $addr = $this->getNextPosition();
 750:                 $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0));
 751:                 $bit = $bit >> 1;
 752:             }
 753:         }
 754:         // remainder bits
 755:         $j = $this->getRemainder($this->version);
 756:         for ($i=0; $i<$j; $i++) {
 757:             $addr = $this->getNextPosition();
 758:             $this->setFrameAt($addr, 0x02);
 759:         }
 760:         // masking
 761:         $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
 762:         if ($mask < 0) {
 763:             if (QR_FIND_BEST_MASK) {
 764:                 $masked = $this->mask($this->width, $this->frame, $this->level);
 765:             } else {
 766:                 $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level);
 767:             }
 768:         } else {
 769:             $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
 770:         }
 771:         if ($masked == NULL) {
 772:             return NULL;
 773:         }
 774:         $this->data = $masked;
 775:     }
 776: 
 777:     // - - - - - - - - - - - - - - - - - - - - - - - - -
 778: 
 779:     // FrameFiller
 780: 
 781:     /**
 782:      * Set frame value at specified position
 783:      * @param $at (array) x,y position
 784:      * @param $val (int) value of the character to set
 785:      */
 786:     protected function setFrameAt($at, $val) {
 787:         $this->frame[$at['y']][$at['x']] = chr($val);
 788:     }
 789: 
 790:     /**
 791:      * Get frame value at specified position
 792:      * @param $at (array) x,y position
 793:      * @return value at specified position
 794:      */
 795:     protected function getFrameAt($at) {
 796:         return ord($this->frame[$at['y']][$at['x']]);
 797:     }
 798: 
 799:     /**
 800:      * Return the next frame position
 801:      * @return array of x,y coordinates
 802:      */
 803:     protected function getNextPosition() {
 804:         do {
 805:             if ($this->bit == -1) {
 806:                 $this->bit = 0;
 807:                 return array('x'=>$this->x, 'y'=>$this->y);
 808:             }
 809:             $x = $this->x;
 810:             $y = $this->y;
 811:             $w = $this->width;
 812:             if ($this->bit == 0) {
 813:                 $x--;
 814:                 $this->bit++;
 815:             } else {
 816:                 $x++;
 817:                 $y += $this->dir;
 818:                 $this->bit--;
 819:             }
 820:             if ($this->dir < 0) {
 821:                 if ($y < 0) {
 822:                     $y = 0;
 823:                     $x -= 2;
 824:                     $this->dir = 1;
 825:                     if ($x == 6) {
 826:                         $x--;
 827:                         $y = 9;
 828:                     }
 829:                 }
 830:             } else {
 831:                 if ($y == $w) {
 832:                     $y = $w - 1;
 833:                     $x -= 2;
 834:                     $this->dir = -1;
 835:                     if ($x == 6) {
 836:                         $x--;
 837:                         $y -= 8;
 838:                     }
 839:                 }
 840:             }
 841:             if (($x < 0) OR ($y < 0)) {
 842:                 return NULL;
 843:             }
 844:             $this->x = $x;
 845:             $this->y = $y;
 846:         } while(ord($this->frame[$y][$x]) & 0x80);
 847:         return array('x'=>$x, 'y'=>$y);
 848:     }
 849: 
 850:     // - - - - - - - - - - - - - - - - - - - - - - - - -
 851: 
 852:     // QRrawcode
 853: 
 854:     /**
 855:      * Initialize code.
 856:      * @param $spec (array) array of ECC specification
 857:      * @return 0 in case of success, -1 in case of error
 858:      */
 859:     protected function init($spec) {
 860:         $dl = $this->rsDataCodes1($spec);
 861:         $el = $this->rsEccCodes1($spec);
 862:         $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
 863:         $blockNo = 0;
 864:         $dataPos = 0;
 865:         $eccPos = 0;
 866:         $endfor = $this->rsBlockNum1($spec);
 867:         for ($i=0; $i < $endfor; ++$i) {
 868:             $ecc = array_slice($this->ecccode, $eccPos);
 869:             $this->rsblocks[$blockNo] = array();
 870:             $this->rsblocks[$blockNo]['dataLength'] = $dl;
 871:             $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
 872:             $this->rsblocks[$blockNo]['eccLength'] = $el;
 873:             $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
 874:             $this->rsblocks[$blockNo]['ecc'] = $ecc;
 875:             $this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc);
 876:             $dataPos += $dl;
 877:             $eccPos += $el;
 878:             $blockNo++;
 879:         }
 880:         if ($this->rsBlockNum2($spec) == 0) {
 881:             return 0;
 882:         }
 883:         $dl = $this->rsDataCodes2($spec);
 884:         $el = $this->rsEccCodes2($spec);
 885:         $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
 886:         if ($rs == NULL) {
 887:             return -1;
 888:         }
 889:         $endfor = $this->rsBlockNum2($spec);
 890:         for ($i=0; $i < $endfor; ++$i) {
 891:             $ecc = array_slice($this->ecccode, $eccPos);
 892:             $this->rsblocks[$blockNo] = array();
 893:             $this->rsblocks[$blockNo]['dataLength'] = $dl;
 894:             $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
 895:             $this->rsblocks[$blockNo]['eccLength'] = $el;
 896:             $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
 897:             $this->rsblocks[$blockNo]['ecc'] = $ecc;
 898:             $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
 899:             $dataPos += $dl;
 900:             $eccPos += $el;
 901:             $blockNo++;
 902:         }
 903:         return 0;
 904:     }
 905: 
 906:     /**
 907:      * Return Reed-Solomon block code.
 908:      * @return array rsblocks
 909:      */
 910:     protected function getCode() {
 911:         if ($this->count < $this->dataLength) {
 912:             $row = $this->count % $this->blocks;
 913:             $col = $this->count / $this->blocks;
 914:             if ($col >= $this->rsblocks[0]['dataLength']) {
 915:                 $row += $this->b1;
 916:             }
 917:             $ret = $this->rsblocks[$row]['data'][$col];
 918:         } elseif ($this->count < $this->dataLength + $this->eccLength) {
 919:             $row = ($this->count - $this->dataLength) % $this->blocks;
 920:             $col = ($this->count - $this->dataLength) / $this->blocks;
 921:             $ret = $this->rsblocks[$row]['ecc'][$col];
 922:         } else {
 923:             return 0;
 924:         }
 925:         $this->count++;
 926:         return $ret;
 927:     }
 928: 
 929:     // - - - - - - - - - - - - - - - - - - - - - - - - -
 930: 
 931:     // QRmask
 932: 
 933:     /**
 934:      * Write Format Information on frame and returns the number of black bits
 935:      * @param $width (int) frame width
 936:      * @param $frame (array) frame
 937:      * @param $mask (array) masking mode
 938:      * @param $level (int) error correction level
 939:      * @return int blacks
 940:      */
 941:      protected function writeFormatInformation($width, &$frame, $mask, $level) {
 942:         $blacks = 0;
 943:         $format =  $this->getFormatInfo($mask, $level);
 944:         for ($i=0; $i<8; ++$i) {
 945:             if ($format & 1) {
 946:                 $blacks += 2;
 947:                 $v = 0x85;
 948:             } else {
 949:                 $v = 0x84;
 950:             }
 951:             $frame[8][$width - 1 - $i] = chr($v);
 952:             if ($i < 6) {
 953:                 $frame[$i][8] = chr($v);
 954:             } else {
 955:                 $frame[$i + 1][8] = chr($v);
 956:             }
 957:             $format = $format >> 1;
 958:         }
 959:         for ($i=0; $i<7; ++$i) {
 960:         if ($format & 1) {
 961:             $blacks += 2;
 962:             $v = 0x85;
 963:         } else {
 964:             $v = 0x84;
 965:         }
 966:         $frame[$width - 7 + $i][8] = chr($v);
 967:         if ($i == 0) {
 968:             $frame[8][7] = chr($v);
 969:         } else {
 970:             $frame[8][6 - $i] = chr($v);
 971:         }
 972:         $format = $format >> 1;
 973:         }
 974:         return $blacks;
 975:     }
 976: 
 977:     /**
 978:      * mask0
 979:      * @param $x (int) X position
 980:      * @param $y (int) Y position
 981:      * @return int mask
 982:      */
 983:      protected function mask0($x, $y) {
 984:         return ($x + $y) & 1;
 985:     }
 986: 
 987:     /**
 988:      * mask1
 989:      * @param $x (int) X position
 990:      * @param $y (int) Y position
 991:      * @return int mask
 992:      */
 993:      protected function mask1($x, $y) {
 994:         return ($y & 1);
 995:     }
 996: 
 997:     /**
 998:      * mask2
 999:      * @param $x (int) X position
1000:      * @param $y (int) Y position
1001:      * @return int mask
1002:      */
1003:      protected function mask2($x, $y) {
1004:         return ($x % 3);
1005:     }
1006: 
1007:     /**
1008:      * mask3
1009:      * @param $x (int) X position
1010:      * @param $y (int) Y position
1011:      * @return int mask
1012:      */
1013:      protected function mask3($x, $y) {
1014:         return ($x + $y) % 3;
1015:     }
1016: 
1017:     /**
1018:      * mask4
1019:      * @param $x (int) X position
1020:      * @param $y (int) Y position
1021:      * @return int mask
1022:      */
1023:      protected function mask4($x, $y) {
1024:         return (((int)($y / 2)) + ((int)($x / 3))) & 1;
1025:     }
1026: 
1027:     /**
1028:      * mask5
1029:      * @param $x (int) X position
1030:      * @param $y (int) Y position
1031:      * @return int mask
1032:      */
1033:      protected function mask5($x, $y) {
1034:         return (($x * $y) & 1) + ($x * $y) % 3;
1035:     }
1036: 
1037:     /**
1038:      * mask6
1039:      * @param $x (int) X position
1040:      * @param $y (int) Y position
1041:      * @return int mask
1042:      */
1043:      protected function mask6($x, $y) {
1044:         return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
1045:     }
1046: 
1047:     /**
1048:      * mask7
1049:      * @param $x (int) X position
1050:      * @param $y (int) Y position
1051:      * @return int mask
1052:      */
1053:      protected function mask7($x, $y) {
1054:         return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
1055:     }
1056: 
1057:     /**
1058:      * Return bitmask
1059:      * @param $maskNo (int) mask number
1060:      * @param $width (int) width
1061:      * @param $frame (array) frame
1062:      * @return array bitmask
1063:      */
1064:     protected function generateMaskNo($maskNo, $width, $frame) {
1065:         $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
1066:         for ($y=0; $y<$width; ++$y) {
1067:             for ($x=0; $x<$width; ++$x) {
1068:                 if (ord($frame[$y][$x]) & 0x80) {
1069:                     $bitMask[$y][$x] = 0;
1070:                 } else {
1071:                     $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
1072:                     $bitMask[$y][$x] = ($maskFunc == 0)?1:0;
1073:                 }
1074:             }
1075:         }
1076:         return $bitMask;
1077:     }
1078: 
1079:     /**
1080:      * makeMaskNo
1081:      * @param $maskNo (int)
1082:      * @param $width (int)
1083:      * @param $s (int)
1084:      * @param $d (int)
1085:      * @param $maskGenOnly (boolean)
1086:      * @return int b
1087:      */
1088:      protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) {
1089:         $b = 0;
1090:         $bitMask = array();
1091:         $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d);
1092:         if ($maskGenOnly) {
1093:             return;
1094:         }
1095:         $d = $s;
1096:         for ($y=0; $y<$width; ++$y) {
1097:             for ($x=0; $x<$width; ++$x) {
1098:                 if ($bitMask[$y][$x] == 1) {
1099:                     $d[$y][$x] = chr(ord($s[$y][$x]) ^ ((int)($bitMask[$y][$x])));
1100:                 }
1101:                 $b += (int)(ord($d[$y][$x]) & 1);
1102:             }
1103:         }
1104:         return $b;
1105:     }
1106: 
1107:     /**
1108:      * makeMask
1109:      * @param $width (int)
1110:      * @param $frame (array)
1111:      * @param $maskNo (int)
1112:      * @param $level (int)
1113:      * @return array mask
1114:      */
1115:      protected function makeMask($width, $frame, $maskNo, $level) {
1116:         $masked = array_fill(0, $width, str_repeat("\0", $width));
1117:         $this->makeMaskNo($maskNo, $width, $frame, $masked);
1118:         $this->writeFormatInformation($width, $masked, $maskNo, $level);
1119:         return $masked;
1120:     }
1121: 
1122:     /**
1123:      * calcN1N3
1124:      * @param $length (int)
1125:      * @return int demerit
1126:      */
1127:      protected function calcN1N3($length) {
1128:         $demerit = 0;
1129:         for ($i=0; $i<$length; ++$i) {
1130:             if ($this->runLength[$i] >= 5) {
1131:                 $demerit += (N1 + ($this->runLength[$i] - 5));
1132:             }
1133:             if ($i & 1) {
1134:                 if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) {
1135:                     $fact = (int)($this->runLength[$i] / 3);
1136:                     if (($this->runLength[$i-2] == $fact)
1137:                         AND ($this->runLength[$i-1] == $fact)
1138:                         AND ($this->runLength[$i+1] == $fact)
1139:                         AND ($this->runLength[$i+2] == $fact)) {
1140:                         if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) {
1141:                             $demerit += N3;
1142:                         } elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) {
1143:                             $demerit += N3;
1144:                         }
1145:                     }
1146:                 }
1147:             }
1148:         }
1149:         return $demerit;
1150:     }
1151: 
1152:     /**
1153:      * evaluateSymbol
1154:      * @param $width (int)
1155:      * @param $frame (array)
1156:      * @return int demerit
1157:      */
1158:      protected function evaluateSymbol($width, $frame) {
1159:         $head = 0;
1160:         $demerit = 0;
1161:         for ($y=0; $y<$width; ++$y) {
1162:             $head = 0;
1163:             $this->runLength[0] = 1;
1164:             $frameY = $frame[$y];
1165:             if ($y > 0) {
1166:                 $frameYM = $frame[$y-1];
1167:             }
1168:             for ($x=0; $x<$width; ++$x) {
1169:                 if (($x > 0) AND ($y > 0)) {
1170:                     $b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]);
1171:                     $w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]);
1172:                     if (($b22 | ($w22 ^ 1)) & 1) {
1173:                         $demerit += N2;
1174:                     }
1175:                 }
1176:                 if (($x == 0) AND (ord($frameY[$x]) & 1)) {
1177:                     $this->runLength[0] = -1;
1178:                     $head = 1;
1179:                     $this->runLength[$head] = 1;
1180:                 } elseif ($x > 0) {
1181:                     if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) {
1182:                         $head++;
1183:                         $this->runLength[$head] = 1;
1184:                     } else {
1185:                         $this->runLength[$head]++;
1186:                     }
1187:                 }
1188:             }
1189:             $demerit += $this->calcN1N3($head+1);
1190:         }
1191:         for ($x=0; $x<$width; ++$x) {
1192:             $head = 0;
1193:             $this->runLength[0] = 1;
1194:             for ($y=0; $y<$width; ++$y) {
1195:                 if (($y == 0) AND (ord($frame[$y][$x]) & 1)) {
1196:                     $this->runLength[0] = -1;
1197:                     $head = 1;
1198:                     $this->runLength[$head] = 1;
1199:                 } elseif ($y > 0) {
1200:                     if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) {
1201:                         $head++;
1202:                         $this->runLength[$head] = 1;
1203:                     } else {
1204:                         $this->runLength[$head]++;
1205:                     }
1206:                 }
1207:             }
1208:             $demerit += $this->calcN1N3($head+1);
1209:         }
1210:         return $demerit;
1211:     }
1212: 
1213:     /**
1214:      * mask
1215:      * @param $width (int)
1216:      * @param $frame (array)
1217:      * @param $level (int)
1218:      * @return array best mask
1219:      */
1220:      protected function mask($width, $frame, $level) {
1221:         $minDemerit = PHP_INT_MAX;
1222:         $bestMaskNum = 0;
1223:         $bestMask = array();
1224:         $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
1225:         if (QR_FIND_FROM_RANDOM !== false) {
1226:             $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
1227:             for ($i = 0; $i <  $howManuOut; ++$i) {
1228:                 $remPos = rand (0, count($checked_masks)-1);
1229:                 unset($checked_masks[$remPos]);
1230:                 $checked_masks = array_values($checked_masks);
1231:             }
1232:         }
1233:         $bestMask = $frame;
1234:         foreach ($checked_masks as $i) {
1235:             $mask = array_fill(0, $width, str_repeat("\0", $width));
1236:             $demerit = 0;
1237:             $blacks = 0;
1238:             $blacks  = $this->makeMaskNo($i, $width, $frame, $mask);
1239:             $blacks += $this->writeFormatInformation($width, $mask, $i, $level);
1240:             $blacks  = (int)(100 * $blacks / ($width * $width));
1241:             $demerit = (int)((int)(abs($blacks - 50) / 5) * N4);
1242:             $demerit += $this->evaluateSymbol($width, $mask);
1243:             if ($demerit < $minDemerit) {
1244:                 $minDemerit = $demerit;
1245:                 $bestMask = $mask;
1246:                 $bestMaskNum = $i;
1247:             }
1248:         }
1249:         return $bestMask;
1250:     }
1251: 
1252:     // - - - - - - - - - - - - - - - - - - - - - - - - -
1253: 
1254:     // QRsplit
1255: 
1256:     /**
1257:      * Return true if the character at specified position is a number
1258:      * @param $str (string) string
1259:      * @param $pos (int) characted position
1260:      * @return boolean true of false
1261:      */
1262:      protected function isdigitat($str, $pos) {
1263:         if ($pos >= strlen($str)) {
1264:             return false;
1265:         }
1266:         return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9')));
1267:     }
1268: 
1269:     /**
1270:      * Return true if the character at specified position is an alphanumeric character
1271:      * @param $str (string) string
1272:      * @param $pos (int) characted position
1273:      * @return boolean true of false
1274:      */
1275:      protected function isalnumat($str, $pos) {
1276:         if ($pos >= strlen($str)) {
1277:             return false;
1278:         }
1279:         return ($this->lookAnTable(ord($str[$pos])) >= 0);
1280:     }
1281: 
1282:     /**
1283:      * identifyMode
1284:      * @param $pos (int)
1285:      * @return int mode
1286:      */
1287:      protected function identifyMode($pos) {
1288:         if ($pos >= strlen($this->dataStr)) {
1289:             return QR_MODE_NL;
1290:         }
1291:         $c = $this->dataStr[$pos];
1292:         if ($this->isdigitat($this->dataStr, $pos)) {
1293:             return QR_MODE_NM;
1294:         } elseif ($this->isalnumat($this->dataStr, $pos)) {
1295:             return QR_MODE_AN;
1296:         } elseif ($this->hint == QR_MODE_KJ) {
1297:             if ($pos+1 < strlen($this->dataStr)) {
1298:                 $d = $this->dataStr[$pos+1];
1299:                 $word = (ord($c) << 8) | ord($d);
1300:                 if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) {
1301:                     return QR_MODE_KJ;
1302:                 }
1303:             }
1304:         }
1305:         return QR_MODE_8B;
1306:     }
1307: 
1308:     /**
1309:      * eatNum
1310:      * @return int run
1311:      */
1312:      protected function eatNum() {
1313:         $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1314:         $p = 0;
1315:         while($this->isdigitat($this->dataStr, $p)) {
1316:             $p++;
1317:         }
1318:         $run = $p;
1319:         $mode = $this->identifyMode($p);
1320:         if ($mode == QR_MODE_8B) {
1321:             $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1322:             + $this->estimateBitsMode8(1)         // + 4 + l8
1323:             - $this->estimateBitsMode8($run + 1); // - 4 - l8
1324:             if ($dif > 0) {
1325:                 return $this->eat8();
1326:             }
1327:         }
1328:         if ($mode == QR_MODE_AN) {
1329:             $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1330:             + $this->estimateBitsModeAn(1)        // + 4 + la
1331:             - $this->estimateBitsModeAn($run + 1);// - 4 - la
1332:             if ($dif > 0) {
1333:                 return $this->eatAn();
1334:             }
1335:         }
1336:         $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr));
1337:         return $run;
1338:     }
1339: 
1340:     /**
1341:      * eatAn
1342:      * @return int run
1343:      */
1344:      protected function eatAn() {
1345:         $la = $this->lengthIndicator(QR_MODE_AN,  $this->version);
1346:         $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1347:         $p =1 ;
1348:         while($this->isalnumat($this->dataStr, $p)) {
1349:             if ($this->isdigitat($this->dataStr, $p)) {
1350:                 $q = $p;
1351:                 while($this->isdigitat($this->dataStr, $q)) {
1352:                     $q++;
1353:                 }
1354:                 $dif = $this->estimateBitsModeAn($p) // + 4 + la
1355:                 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1356:                 - $this->estimateBitsModeAn($q); // - 4 - la
1357:                 if ($dif < 0) {
1358:                     break;
1359:                 } else {
1360:                     $p = $q;
1361:                 }
1362:             } else {
1363:                 $p++;
1364:             }
1365:         }
1366:         $run = $p;
1367:         if (!$this->isalnumat($this->dataStr, $p)) {
1368:             $dif = $this->estimateBitsModeAn($run) + 4 + $la
1369:             + $this->estimateBitsMode8(1) // + 4 + l8
1370:             - $this->estimateBitsMode8($run + 1); // - 4 - l8
1371:             if ($dif > 0) {
1372:                 return $this->eat8();
1373:             }
1374:         }
1375:         $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr));
1376:         return $run;
1377:     }
1378: 
1379:     /**
1380:      * eatKanji
1381:      * @return int run
1382:      */
1383:      protected function eatKanji() {
1384:         $p = 0;
1385:         while($this->identifyMode($p) == QR_MODE_KJ) {
1386:             $p += 2;
1387:         }
1388:         $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr));
1389:         return $run;
1390:     }
1391: 
1392:     /**
1393:      * eat8
1394:      * @return int run
1395:      */
1396:      protected function eat8() {
1397:         $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1398:         $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1399:         $p = 1;
1400:         $dataStrLen = strlen($this->dataStr);
1401:         while($p < $dataStrLen) {
1402:             $mode = $this->identifyMode($p);
1403:             if ($mode == QR_MODE_KJ) {
1404:                 break;
1405:             }
1406:             if ($mode == QR_MODE_NM) {
1407:                 $q = $p;
1408:                 while($this->isdigitat($this->dataStr, $q)) {
1409:                     $q++;
1410:                 }
1411:                 $dif = $this->estimateBitsMode8($p) // + 4 + l8
1412:                 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1413:                 - $this->estimateBitsMode8($q); // - 4 - l8
1414:                 if ($dif < 0) {
1415:                     break;
1416:                 } else {
1417:                     $p = $q;
1418:                 }
1419:             } elseif ($mode == QR_MODE_AN) {
1420:                 $q = $p;
1421:                 while($this->isalnumat($this->dataStr, $q)) {
1422:                     $q++;
1423:                 }
1424:                 $dif = $this->estimateBitsMode8($p)  // + 4 + l8
1425:                 + $this->estimateBitsModeAn($q - $p) + 4 + $la
1426:                 - $this->estimateBitsMode8($q); // - 4 - l8
1427:                 if ($dif < 0) {
1428:                     break;
1429:                 } else {
1430:                     $p = $q;
1431:                 }
1432:             } else {
1433:                 $p++;
1434:             }
1435:         }
1436:         $run = $p;
1437:         $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));
1438:         return $run;
1439:     }
1440: 
1441:     /**
1442:      * splitString
1443:      * @return (int)
1444:      */
1445:      protected function splitString() {
1446:         while (strlen($this->dataStr) > 0) {
1447:             $mode = $this->identifyMode(0);
1448:             switch ($mode) {
1449:                 case QR_MODE_NM: {
1450:                     $length = $this->eatNum();
1451:                     break;
1452:                 }
1453:                 case QR_MODE_AN: {
1454:                     $length = $this->eatAn();
1455:                     break;
1456:                 }
1457:                 case QR_MODE_KJ: {
1458:                     if ($hint == QR_MODE_KJ) {
1459:                         $length = $this->eatKanji();
1460:                     } else {
1461:                         $length = $this->eat8();
1462:                     }
1463:                     break;
1464:                 }
1465:                 default: {
1466:                     $length = $this->eat8();
1467:                     break;
1468:                 }
1469:             }
1470:             if ($length == 0) {
1471:                 return 0;
1472:             }
1473:             if ($length < 0) {
1474:                 return -1;
1475:             }
1476:             $this->dataStr = substr($this->dataStr, $length);
1477:         }
1478:         return 0;
1479:     }
1480: 
1481:     /**
1482:      * toUpper
1483:      */
1484:      protected function toUpper() {
1485:         $stringLen = strlen($this->dataStr);
1486:         $p = 0;
1487:         while ($p < $stringLen) {
1488:             $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);
1489:             if ($mode == QR_MODE_KJ) {
1490:                 $p += 2;
1491:             } else {
1492:                 if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
1493:                     $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
1494:                 }
1495:                 $p++;
1496:             }
1497:         }
1498:         return $this->dataStr;
1499:     }
1500: 
1501:     // - - - - - - - - - - - - - - - - - - - - - - - - -
1502: 
1503:     // QRinputItem
1504: 
1505:     /**
1506:      * newInputItem
1507:      * @param $mode (int)
1508:      * @param $size (int)
1509:      * @param $data (array)
1510:      * @param $bstream (array)
1511:      * @return array input item
1512:      */
1513:      protected function newInputItem($mode, $size, $data, $bstream=null) {
1514:         $setData = array_slice($data, 0, $size);
1515:         if (count($setData) < $size) {
1516:             $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
1517:         }
1518:         if (!$this->check($mode, $size, $setData)) {
1519:             return NULL;
1520:         }
1521:         $inputitem = array();
1522:         $inputitem['mode'] = $mode;
1523:         $inputitem['size'] = $size;
1524:         $inputitem['data'] = $setData;
1525:         $inputitem['bstream'] = $bstream;
1526:         return $inputitem;
1527:     }
1528: 
1529:     /**
1530:      * encodeModeNum
1531:      * @param $inputitem (array)
1532:      * @param $version (int)
1533:      * @return array input item
1534:      */
1535:      protected function encodeModeNum($inputitem, $version) {
1536:         $words = (int)($inputitem['size'] / 3);
1537:         $inputitem['bstream'] = array();
1538:         $val = 0x1;
1539:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1540:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
1541:         for ($i=0; $i < $words; ++$i) {
1542:             $val  = (ord($inputitem['data'][$i*3  ]) - ord('0')) * 100;
1543:             $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10;
1544:             $val += (ord($inputitem['data'][$i*3+2]) - ord('0'));
1545:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
1546:         }
1547:         if ($inputitem['size'] - $words * 3 == 1) {
1548:             $val = ord($inputitem['data'][$words*3]) - ord('0');
1549:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1550:         } elseif (($inputitem['size'] - ($words * 3)) == 2) {
1551:             $val  = (ord($inputitem['data'][$words*3  ]) - ord('0')) * 10;
1552:             $val += (ord($inputitem['data'][$words*3+1]) - ord('0'));
1553:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
1554:         }
1555:         return $inputitem;
1556:     }
1557: 
1558:     /**
1559:      * encodeModeAn
1560:      * @param $inputitem (array)
1561:      * @param $version (int)
1562:      * @return array input item
1563:      */
1564:      protected function encodeModeAn($inputitem, $version) {
1565:         $words = (int)($inputitem['size'] / 2);
1566:         $inputitem['bstream'] = array();
1567:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
1568:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']);
1569:         for ($i=0; $i < $words; ++$i) {
1570:             $val  = (int)($this->lookAnTable(ord($inputitem['data'][$i*2])) * 45);
1571:             $val += (int)($this->lookAnTable(ord($inputitem['data'][($i*2)+1])));
1572:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
1573:         }
1574:         if ($inputitem['size'] & 1) {
1575:             $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
1576:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
1577:         }
1578:         return $inputitem;
1579:     }
1580: 
1581:     /**
1582:      * encodeMode8
1583:      * @param $inputitem (array)
1584:      * @param $version (int)
1585:      * @return array input item
1586:      */
1587:      protected function encodeMode8($inputitem, $version) {
1588:         $inputitem['bstream'] = array();
1589:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
1590:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
1591:         for ($i=0; $i < $inputitem['size']; ++$i) {
1592:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
1593:         }
1594:         return $inputitem;
1595:     }
1596: 
1597:     /**
1598:      * encodeModeKanji
1599:      * @param $inputitem (array)
1600:      * @param $version (int)
1601:      * @return array input item
1602:      */
1603:      protected function encodeModeKanji($inputitem, $version) {
1604:         $inputitem['bstream'] = array();
1605:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
1606:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2));
1607:         for ($i=0; $i<$inputitem['size']; $i+=2) {
1608:             $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]);
1609:             if ($val <= 0x9ffc) {
1610:                 $val -= 0x8140;
1611:             } else {
1612:                 $val -= 0xc140;
1613:             }
1614:             $h = ($val >> 8) * 0xc0;
1615:             $val = ($val & 0xff) + $h;
1616:             $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
1617:         }
1618:         return $inputitem;
1619:     }
1620: 
1621:     /**
1622:      * encodeModeStructure
1623:      * @param $inputitem (array)
1624:      * @return array input item
1625:      */
1626:      protected function encodeModeStructure($inputitem) {
1627:         $inputitem['bstream'] = array();
1628:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
1629:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
1630:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
1631:         $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));
1632:         return $inputitem;
1633:     }
1634: 
1635:     /**
1636:      * encodeBitStream
1637:      * @param $inputitem (array)
1638:      * @param $version (int)
1639:      * @return array input item
1640:      */
1641:      protected function encodeBitStream($inputitem, $version) {
1642:         $inputitem['bstream'] = array();
1643:         $words = $this->maximumWords($inputitem['mode'], $version);
1644:         if ($inputitem['size'] > $words) {
1645:             $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
1646:             $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
1647:             $st1 = $this->encodeBitStream($st1, $version);
1648:             $st2 = $this->encodeBitStream($st2, $version);
1649:             $inputitem['bstream'] = array();
1650:             $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
1651:             $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
1652:         } else {
1653:             switch($inputitem['mode']) {
1654:                 case QR_MODE_NM: {
1655:                     $inputitem = $this->encodeModeNum($inputitem, $version);
1656:                     break;
1657:                 }
1658:                 case QR_MODE_AN: {
1659:                     $inputitem = $this->encodeModeAn($inputitem, $version);
1660:                     break;
1661:                 }
1662:                 case QR_MODE_8B: {
1663:                     $inputitem = $this->encodeMode8($inputitem, $version);
1664:                     break;
1665:                 }
1666:                 case QR_MODE_KJ: {
1667:                     $inputitem = $this->encodeModeKanji($inputitem, $version);
1668:                     break;
1669:                 }
1670:                 case QR_MODE_ST: {
1671:                     $inputitem = $this->encodeModeStructure($inputitem);
1672:                     break;
1673:                 }
1674:                 default: {
1675:                     break;
1676:                 }
1677:             }
1678:         }
1679:         return $inputitem;
1680:     }
1681: 
1682:     // - - - - - - - - - - - - - - - - - - - - - - - - -
1683: 
1684:     // QRinput
1685: 
1686:     /**
1687:      * Append data to an input object.
1688:      * The data is copied and appended to the input object.
1689:      * @param $items (arrray) input items
1690:      * @param $mode (int) encoding mode.
1691:      * @param $size (int) size of data (byte).
1692:      * @param $data (array) array of input data.
1693:      * @return items
1694:      *
1695:      */
1696:     protected function appendNewInputItem($items, $mode, $size, $data) {
1697:         $newitem = $this->newInputItem($mode, $size, $data);
1698:         if (!empty($newitem)) {
1699:             $items[] = $newitem;
1700:         }
1701:         return $items;
1702:     }
1703: 
1704:     /**
1705:      * insertStructuredAppendHeader
1706:      * @param $items (array)
1707:      * @param $size (int)
1708:      * @param $index (int)
1709:      * @param $parity (int)
1710:      * @return array items
1711:      */
1712:      protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
1713:         if ($size > MAX_STRUCTURED_SYMBOLS) {
1714:             return -1;
1715:         }
1716:         if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
1717:             return -1;
1718:         }
1719:         $buf = array($size, $index, $parity);
1720:         $entry = $this->newInputItem(QR_MODE_ST, 3, buf);
1721:         array_unshift($items, $entry);
1722:         return $items;
1723:     }
1724: 
1725:     /**
1726:      * calcParity
1727:      * @param $items (array)
1728:      * @return int parity
1729:      */
1730:      protected function calcParity($items) {
1731:         $parity = 0;
1732:         foreach ($items as $item) {
1733:             if ($item['mode'] != QR_MODE_ST) {
1734:                 for ($i=$item['size']-1; $i>=0; --$i) {
1735:                     $parity ^= $item['data'][$i];
1736:                 }
1737:             }
1738:         }
1739:         return $parity;
1740:     }
1741: 
1742:     /**
1743:      * checkModeNum
1744:      * @param $size (int)
1745:      * @param $data (array)
1746:      * @return boolean true or false
1747:      */
1748:      protected function checkModeNum($size, $data) {
1749:         for ($i=0; $i<$size; ++$i) {
1750:             if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
1751:                 return false;
1752:             }
1753:         }
1754:         return true;
1755:     }
1756: 
1757:     /**
1758:      * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
1759:      * @param $c (int) character value
1760:      * @return value
1761:      */
1762:     protected function lookAnTable($c) {
1763:         return (($c > 127)?-1:$this->anTable[$c]);
1764:     }
1765: 
1766:     /**
1767:      * checkModeAn
1768:      * @param $size (int)
1769:      * @param $data (array)
1770:      * @return boolean true or false
1771:      */
1772:      protected function checkModeAn($size, $data) {
1773:         for ($i=0; $i<$size; ++$i) {
1774:             if ($this->lookAnTable(ord($data[$i])) == -1) {
1775:                 return false;
1776:             }
1777:         }
1778:         return true;
1779:     }
1780: 
1781:     /**
1782:      * estimateBitsModeNum
1783:      * @param $size (int)
1784:      * @return int number of bits
1785:      */
1786:      protected function estimateBitsModeNum($size) {
1787:         $w = (int)($size / 3);
1788:         $bits = ($w * 10);
1789:         switch($size - ($w * 3)) {
1790:             case 1: {
1791:                 $bits += 4;
1792:                 break;
1793:             }
1794:             case 2: {
1795:                 $bits += 7;
1796:                 break;
1797:             }
1798:         }
1799:         return $bits;
1800:     }
1801: 
1802:     /**
1803:      * estimateBitsModeAn
1804:      * @param $size (int)
1805:      * @return int number of bits
1806:      */
1807:      protected function estimateBitsModeAn($size) {
1808:         $bits = (int)($size * 5.5); // (size / 2 ) * 11
1809:         if ($size & 1) {
1810:             $bits += 6;
1811:         }
1812:         return $bits;
1813:     }
1814: 
1815:     /**
1816:      * estimateBitsMode8
1817:      * @param $size (int)
1818:      * @return int number of bits
1819:      */
1820:      protected function estimateBitsMode8($size) {
1821:         return (int)($size * 8);
1822:     }
1823: 
1824:     /**
1825:      * estimateBitsModeKanji
1826:      * @param $size (int)
1827:      * @return int number of bits
1828:      */
1829:      protected function estimateBitsModeKanji($size) {
1830:         return (int)($size * 6.5); // (size / 2 ) * 13
1831:     }
1832: 
1833:     /**
1834:      * checkModeKanji
1835:      * @param $size (int)
1836:      * @param $data (array)
1837:      * @return boolean true or false
1838:      */
1839:      protected function checkModeKanji($size, $data) {
1840:         if ($size & 1) {
1841:             return false;
1842:         }
1843:         for ($i=0; $i<$size; $i+=2) {
1844:             $val = (ord($data[$i]) << 8) | ord($data[$i+1]);
1845:             if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) {
1846:                 return false;
1847:             }
1848:         }
1849:         return true;
1850:     }
1851: 
1852:     /**
1853:      * Validate the input data.
1854:      * @param $mode (int) encoding mode.
1855:      * @param $size (int) size of data (byte).
1856:      * @param $data (array) data to validate
1857:      * @return boolean true in case of valid data, false otherwise
1858:      */
1859:     protected function check($mode, $size, $data) {
1860:         if ($size <= 0) {
1861:             return false;
1862:         }
1863:         switch($mode) {
1864:             case QR_MODE_NM: {
1865:                 return $this->checkModeNum($size, $data);
1866:             }
1867:             case QR_MODE_AN: {
1868:                 return $this->checkModeAn($size, $data);
1869:             }
1870:             case QR_MODE_KJ: {
1871:                 return $this->checkModeKanji($size, $data);
1872:             }
1873:             case QR_MODE_8B: {
1874:                 return true;
1875:             }
1876:             case QR_MODE_ST: {
1877:                 return true;
1878:             }
1879:             default: {
1880:                 break;
1881:             }
1882:         }
1883:         return false;
1884:     }
1885: 
1886:     /**
1887:      * estimateBitStreamSize
1888:      * @param $items (array)
1889:      * @param $version (int)
1890:      * @return int bits
1891:      */
1892:      protected function estimateBitStreamSize($items, $version) {
1893:         $bits = 0;
1894:         if ($version == 0) {
1895:             $version = 1;
1896:         }
1897:         foreach ($items as $item) {
1898:             switch($item['mode']) {
1899:                 case QR_MODE_NM: {
1900:                     $bits = $this->estimateBitsModeNum($item['size']);
1901:                     break;
1902:                 }
1903:                 case QR_MODE_AN: {
1904:                     $bits = $this->estimateBitsModeAn($item['size']);
1905:                     break;
1906:                 }
1907:                 case QR_MODE_8B: {
1908:                     $bits = $this->estimateBitsMode8($item['size']);
1909:                     break;
1910:                 }
1911:                 case QR_MODE_KJ: {
1912:                     $bits = $this->estimateBitsModeKanji($item['size']);
1913:                     break;
1914:                 }
1915:                 case QR_MODE_ST: {
1916:                     return STRUCTURE_HEADER_BITS;
1917:                 }
1918:                 default: {
1919:                     return 0;
1920:                 }
1921:             }
1922:             $l = $this->lengthIndicator($item['mode'], $version);
1923:             $m = 1 << $l;
1924:             $num = (int)(($item['size'] + $m - 1) / $m);
1925:             $bits += $num * (4 + $l);
1926:         }
1927:         return $bits;
1928:     }
1929: 
1930:     /**
1931:      * estimateVersion
1932:      * @param $items (array)
1933:      * @return int version
1934:      */
1935:      protected function estimateVersion($items) {
1936:         $version = 0;
1937:         $prev = 0;
1938:         do {
1939:             $prev = $version;
1940:             $bits = $this->estimateBitStreamSize($items, $prev);
1941:             $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
1942:             if ($version < 0) {
1943:                 return -1;
1944:             }
1945:         } while ($version > $prev);
1946:         return $version;
1947:     }
1948: 
1949:     /**
1950:      * lengthOfCode
1951:      * @param $mode (int)
1952:      * @param $version (int)
1953:      * @param $bits (int)
1954:      * @return int size
1955:      */
1956:      protected function lengthOfCode($mode, $version, $bits) {
1957:         $payload = $bits - 4 - $this->lengthIndicator($mode, $version);
1958:         switch($mode) {
1959:             case QR_MODE_NM: {
1960:                 $chunks = (int)($payload / 10);
1961:                 $remain = $payload - $chunks * 10;
1962:                 $size = $chunks * 3;
1963:                 if ($remain >= 7) {
1964:                     $size += 2;
1965:                 } elseif ($remain >= 4) {
1966:                     $size += 1;
1967:                 }
1968:                 break;
1969:             }
1970:             case QR_MODE_AN: {
1971:                 $chunks = (int)($payload / 11);
1972:                 $remain = $payload - $chunks * 11;
1973:                 $size = $chunks * 2;
1974:                 if ($remain >= 6) {
1975:                     ++$size;
1976:                 }
1977:                 break;
1978:             }
1979:             case QR_MODE_8B: {
1980:                 $size = (int)($payload / 8);
1981:                 break;
1982:             }
1983:             case QR_MODE_KJ: {
1984:                 $size = (int)(($payload / 13) * 2);
1985:                 break;
1986:             }
1987:             case QR_MODE_ST: {
1988:                 $size = (int)($payload / 8);
1989:                 break;
1990:             }
1991:             default: {
1992:                 $size = 0;
1993:                 break;
1994:             }
1995:         }
1996:         $maxsize = $this->maximumWords($mode, $version);
1997:         if ($size < 0) {
1998:             $size = 0;
1999:         }
2000:         if ($size > $maxsize) {
2001:             $size = $maxsize;
2002:         }
2003:         return $size;
2004:     }
2005: 
2006:     /**
2007:      * createBitStream
2008:      * @param $items (array)
2009:      * @return array of items and total bits
2010:      */
2011:      protected function createBitStream($items) {
2012:         $total = 0;
2013:         foreach ($items as $key => $item) {
2014:             $items[$key] = $this->encodeBitStream($item, $this->version);
2015:             $bits = count($items[$key]['bstream']);
2016:             $total += $bits;
2017:         }
2018:         return array($items, $total);
2019:     }
2020: 
2021:     /**
2022:      * convertData
2023:      * @param $items (array)
2024:      * @return array items
2025:      */
2026:      protected function convertData($items) {
2027:         $ver = $this->estimateVersion($items);
2028:         if ($ver > $this->version) {
2029:             $this->version = $ver;
2030:         }
2031:         while (true) {
2032:             $cbs = $this->createBitStream($items);
2033:             $items = $cbs[0];
2034:             $bits = $cbs[1];
2035:             if ($bits < 0) {
2036:                 return -1;
2037:             }
2038:             $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
2039:             if ($ver < 0) {
2040:                 return -1;
2041:             } elseif ($ver > $this->version) {
2042:                 $this->version = $ver;
2043:             } else {
2044:                 break;
2045:             }
2046:         }
2047:         return $items;
2048:     }
2049: 
2050:     /**
2051:      * Append Padding Bit to bitstream
2052:      * @param $bstream (array)
2053:      * @return array bitstream
2054:      */
2055:      protected function appendPaddingBit($bstream) {
2056:         if (is_null($bstream)) {
2057:             return null;
2058:         }
2059:         $bits = count($bstream);
2060:         $maxwords = $this->getDataLength($this->version, $this->level);
2061:         $maxbits = $maxwords * 8;
2062:         if ($maxbits == $bits) {
2063:             return $bstream;
2064:         }
2065:         if ($maxbits - $bits < 5) {
2066:             return $this->appendNum($bstream, $maxbits - $bits, 0);
2067:         }
2068:         $bits += 4;
2069:         $words = (int)(($bits + 7) / 8);
2070:         $padding = array();
2071:         $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
2072:         $padlen = $maxwords - $words;
2073:         if ($padlen > 0) {
2074:             $padbuf = array();
2075:             for ($i=0; $i<$padlen; ++$i) {
2076:                 $padbuf[$i] = ($i&1)?0x11:0xec;
2077:             }
2078:             $padding = $this->appendBytes($padding, $padlen, $padbuf);
2079:         }
2080:         return $this->appendBitstream($bstream, $padding);
2081:     }
2082: 
2083:     /**
2084:      * mergeBitStream
2085:      * @param $items (array) items
2086:      * @return array bitstream
2087:      */
2088:      protected function mergeBitStream($items) {
2089:         $items = $this->convertData($items);
2090:         if (!is_array($items)) {
2091:             return null;
2092:         }
2093:         $bstream = array();
2094:         foreach ($items as $item) {
2095:             $bstream = $this->appendBitstream($bstream, $item['bstream']);
2096:         }
2097:         return $bstream;
2098:     }
2099: 
2100:     /**
2101:      * Returns a stream of bits.
2102:      * @param $items (int)
2103:      * @return array padded merged byte stream
2104:      */
2105:     protected function getBitStream($items) {
2106:         $bstream = $this->mergeBitStream($items);
2107:         return $this->appendPaddingBit($bstream);
2108:     }
2109: 
2110:     /**
2111:      * Pack all bit streams padding bits into a byte array.
2112:      * @param $items (int)
2113:      * @return array padded merged byte stream
2114:      */
2115:     protected function getByteStream($items) {
2116:         $bstream = $this->getBitStream($items);
2117:         return $this->bitstreamToByte($bstream);
2118:     }
2119: 
2120:     // - - - - - - - - - - - - - - - - - - - - - - - - -
2121: 
2122:     // QRbitstream
2123: 
2124:     /**
2125:      * Return an array with zeros
2126:      * @param $setLength (int) array size
2127:      * @return array
2128:      */
2129:      protected function allocate($setLength) {
2130:         return array_fill(0, $setLength, 0);
2131:     }
2132: 
2133:     /**
2134:      * Return new bitstream from number
2135:      * @param $bits (int) number of bits
2136:      * @param $num (int) number
2137:      * @return array bitstream
2138:      */
2139:      protected function newFromNum($bits, $num) {
2140:         $bstream = $this->allocate($bits);
2141:         $mask = 1 << ($bits - 1);
2142:         for ($i=0; $i<$bits; ++$i) {
2143:             if ($num & $mask) {
2144:                 $bstream[$i] = 1;
2145:             } else {
2146:                 $bstream[$i] = 0;
2147:             }
2148:             $mask = $mask >> 1;
2149:         }
2150:         return $bstream;
2151:     }
2152: 
2153:     /**
2154:      * Return new bitstream from bytes
2155:      * @param $size (int) size
2156:      * @param $data (array) bytes
2157:      * @return array bitstream
2158:      */
2159:      protected function newFromBytes($size, $data) {
2160:         $bstream = $this->allocate($size * 8);
2161:         $p=0;
2162:         for ($i=0; $i<$size; ++$i) {
2163:             $mask = 0x80;
2164:             for ($j=0; $j<8; ++$j) {
2165:                 if ($data[$i] & $mask) {
2166:                     $bstream[$p] = 1;
2167:                 } else {
2168:                     $bstream[$p] = 0;
2169:                 }
2170:                 $p++;
2171:                 $mask = $mask >> 1;
2172:             }
2173:         }
2174:         return $bstream;
2175:     }
2176: 
2177:     /**
2178:      * Append one bitstream to another
2179:      * @param $bitstream (array) original bitstream
2180:      * @param $append (array) bitstream to append
2181:      * @return array bitstream
2182:      */
2183:      protected function appendBitstream($bitstream, $append) {
2184:         if ((!is_array($append)) OR (count($append) == 0)) {
2185:             return $bitstream;
2186:         }
2187:         if (count($bitstream) == 0) {
2188:             return $append;
2189:         }
2190:         return array_values(array_merge($bitstream, $append));
2191:     }
2192: 
2193:     /**
2194:      * Append one bitstream created from number to another
2195:      * @param $bitstream (array) original bitstream
2196:      * @param $bits (int) number of bits
2197:      * @param $num (int) number
2198:      * @return array bitstream
2199:      */
2200:      protected function appendNum($bitstream, $bits, $num) {
2201:         if ($bits == 0) {
2202:             return 0;
2203:         }
2204:         $b = $this->newFromNum($bits, $num);
2205:         return $this->appendBitstream($bitstream, $b);
2206:     }
2207: 
2208:     /**
2209:      * Append one bitstream created from bytes to another
2210:      * @param $bitstream (array) original bitstream
2211:      * @param $size (int) size
2212:      * @param $data (array) bytes
2213:      * @return array bitstream
2214:      */
2215:      protected function appendBytes($bitstream, $size, $data) {
2216:         if ($size == 0) {
2217:             return 0;
2218:         }
2219:         $b = $this->newFromBytes($size, $data);
2220:         return $this->appendBitstream($bitstream, $b);
2221:     }
2222: 
2223:     /**
2224:      * Convert bitstream to bytes
2225:      * @param $bstream (array) original bitstream
2226:      * @return array of bytes
2227:      */
2228:      protected function bitstreamToByte($bstream) {
2229:         if (is_null($bstream)) {
2230:             return null;
2231:         }
2232:         $size = count($bstream);
2233:         if ($size == 0) {
2234:             return array();
2235:         }
2236:         $data = array_fill(0, (int)(($size + 7) / 8), 0);
2237:         $bytes = (int)($size / 8);
2238:         $p = 0;
2239:         for ($i=0; $i<$bytes; $i++) {
2240:             $v = 0;
2241:             for ($j=0; $j<8; $j++) {
2242:                 $v = $v << 1;
2243:                 $v |= $bstream[$p];
2244:                 $p++;
2245:             }
2246:             $data[$i] = $v;
2247:         }
2248:         if ($size & 7) {
2249:             $v = 0;
2250:             for ($j=0; $j<($size & 7); $j++) {
2251:                 $v = $v << 1;
2252:                 $v |= $bstream[$p];
2253:                 $p++;
2254:             }
2255:             $data[$bytes] = $v;
2256:         }
2257:         return $data;
2258:     }
2259: 
2260:     // - - - - - - - - - - - - - - - - - - - - - - - - -
2261: 
2262:     // QRspec
2263: 
2264:     /**
2265:      * Replace a value on the array at the specified position
2266:      * @param $srctab (array)
2267:      * @param $x (int) X position
2268:      * @param $y (int) Y position
2269:      * @param $repl (string) value to replace
2270:      * @param $replLen (int) length of the repl string
2271:      * @return array srctab
2272:      */
2273:      protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) {
2274:         $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
2275:         return $srctab;
2276:     }
2277: 
2278:     /**
2279:      * Return maximum data code length (bytes) for the version.
2280:      * @param $version (int) version
2281:      * @param $level (int) error correction level
2282:      * @return int maximum size (bytes)
2283:      */
2284:     protected function getDataLength($version, $level) {
2285:         return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level];
2286:     }
2287: 
2288:     /**
2289:      * Return maximum error correction code length (bytes) for the version.
2290:      * @param $version (int) version
2291:      * @param $level (int) error correction level
2292:      * @return int ECC size (bytes)
2293:      */
2294:     protected function getECCLength($version, $level){
2295:         return $this->capacity[$version][QRCAP_EC][$level];
2296:     }
2297: 
2298:     /**
2299:      * Return the width of the symbol for the version.
2300:      * @param $version (int) version
2301:      * @return int width
2302:      */
2303:     protected function getWidth($version) {
2304:         return $this->capacity[$version][QRCAP_WIDTH];
2305:     }
2306: 
2307:     /**
2308:      * Return the numer of remainder bits.
2309:      * @param $version (int) version
2310:      * @return int number of remainder bits
2311:      */
2312:     protected function getRemainder($version) {
2313:         return $this->capacity[$version][QRCAP_REMINDER];
2314:     }
2315: 
2316:     /**
2317:      * Return a version number that satisfies the input code length.
2318:      * @param $size (int) input code length (bytes)
2319:      * @param $level (int) error correction level
2320:      * @return int version number
2321:      */
2322:     protected function getMinimumVersion($size, $level) {
2323:         for ($i = 1; $i <= QRSPEC_VERSION_MAX; ++$i) {
2324:             $words = ($this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]);
2325:             if ($words >= $size) {
2326:                 return $i;
2327:             }
2328:         }
2329:         // the size of input data is greater than QR capacity, try to lover the error correction mode
2330:         return -1;
2331:     }
2332: 
2333:     /**
2334:      * Return the size of length indicator for the mode and version.
2335:      * @param $mode (int) encoding mode
2336:      * @param $version (int) version
2337:      * @return int the size of the appropriate length indicator (bits).
2338:      */
2339:     protected function lengthIndicator($mode, $version) {
2340:         if ($mode == QR_MODE_ST) {
2341:             return 0;
2342:         }
2343:         if ($version <= 9) {
2344:             $l = 0;
2345:         } elseif ($version <= 26) {
2346:             $l = 1;
2347:         } else {
2348:             $l = 2;
2349:         }
2350:         return $this->lengthTableBits[$mode][$l];
2351:     }
2352: 
2353:     /**
2354:      * Return the maximum length for the mode and version.
2355:      * @param $mode (int) encoding mode
2356:      * @param $version (int) version
2357:      * @return int the maximum length (bytes)
2358:      */
2359:     protected function maximumWords($mode, $version) {
2360:         if ($mode == QR_MODE_ST) {
2361:             return 3;
2362:         }
2363:         if ($version <= 9) {
2364:             $l = 0;
2365:         } else if ($version <= 26) {
2366:             $l = 1;
2367:         } else {
2368:             $l = 2;
2369:         }
2370:         $bits = $this->lengthTableBits[$mode][$l];
2371:         $words = (1 << $bits) - 1;
2372:         if ($mode == QR_MODE_KJ) {
2373:             $words *= 2; // the number of bytes is required
2374:         }
2375:         return $words;
2376:     }
2377: 
2378:     /**
2379:      * Return an array of ECC specification.
2380:      * @param $version (int) version
2381:      * @param $level (int) error correction level
2382:      * @param $spec (array) an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code}
2383:      * @return array spec
2384:      */
2385:     protected function getEccSpec($version, $level, $spec) {
2386:         if (count($spec) < 5) {
2387:             $spec = array(0, 0, 0, 0, 0);
2388:         }
2389:         $b1 = $this->eccTable[$version][$level][0];
2390:         $b2 = $this->eccTable[$version][$level][1];
2391:         $data = $this->getDataLength($version, $level);
2392:         $ecc = $this->getECCLength($version, $level);
2393:         if ($b2 == 0) {
2394:             $spec[0] = $b1;
2395:             $spec[1] = (int)($data / $b1);
2396:             $spec[2] = (int)($ecc / $b1);
2397:             $spec[3] = 0;
2398:             $spec[4] = 0;
2399:         } else {
2400:             $spec[0] = $b1;
2401:             $spec[1] = (int)($data / ($b1 + $b2));
2402:             $spec[2] = (int)($ecc  / ($b1 + $b2));
2403:             $spec[3] = $b2;
2404:             $spec[4] = $spec[1] + 1;
2405:         }
2406:         return $spec;
2407:     }
2408: 
2409:     /**
2410:      * Put an alignment marker.
2411:      * @param $frame (array) frame
2412:      * @param $ox (int) X center coordinate of the pattern
2413:      * @param $oy (int) Y center coordinate of the pattern
2414:      * @return array frame
2415:      */
2416:     protected function putAlignmentMarker($frame, $ox, $oy) {
2417:         $finder = array(
2418:             "\xa1\xa1\xa1\xa1\xa1",
2419:             "\xa1\xa0\xa0\xa0\xa1",
2420:             "\xa1\xa0\xa1\xa0\xa1",
2421:             "\xa1\xa0\xa0\xa0\xa1",
2422:             "\xa1\xa1\xa1\xa1\xa1"
2423:             );
2424:         $yStart = $oy - 2;
2425:         $xStart = $ox - 2;
2426:         for ($y=0; $y < 5; $y++) {
2427:             $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]);
2428:         }
2429:         return $frame;
2430:     }
2431: 
2432:     /**
2433:      * Put an alignment pattern.
2434:      * @param $version (int) version
2435:      * @param $frame (array) frame
2436:      * @param $width (int) width
2437:      * @return array frame
2438:      */
2439:      protected function putAlignmentPattern($version, $frame, $width) {
2440:         if ($version < 2) {
2441:             return $frame;
2442:         }
2443:         $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0];
2444:         if ($d < 0) {
2445:             $w = 2;
2446:         } else {
2447:             $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2);
2448:         }
2449:         if ($w * $w - 3 == 1) {
2450:             $x = $this->alignmentPattern[$version][0];
2451:             $y = $this->alignmentPattern[$version][0];
2452:             $frame = $this->putAlignmentMarker($frame, $x, $y);
2453:             return $frame;
2454:         }
2455:         $cx = $this->alignmentPattern[$version][0];
2456:         $wo = $w - 1;
2457:         for ($x=1; $x < $wo; ++$x) {
2458:             $frame = $this->putAlignmentMarker($frame, 6, $cx);
2459:             $frame = $this->putAlignmentMarker($frame, $cx,  6);
2460:             $cx += $d;
2461:         }
2462:         $cy = $this->alignmentPattern[$version][0];
2463:         for ($y=0; $y < $wo; ++$y) {
2464:             $cx = $this->alignmentPattern[$version][0];
2465:             for ($x=0; $x < $wo; ++$x) {
2466:                 $frame = $this->putAlignmentMarker($frame, $cx, $cy);
2467:                 $cx += $d;
2468:             }
2469:             $cy += $d;
2470:         }
2471:         return $frame;
2472:     }
2473: 
2474:     /**
2475:      * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits.
2476:      * @param $version (int) version
2477:      * @return BCH encoded version information pattern
2478:      */
2479:     protected function getVersionPattern($version) {
2480:         if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) {
2481:             return 0;
2482:         }
2483:         return $this->versionPattern[($version - 7)];
2484:     }
2485: 
2486:     /**
2487:      * Return BCH encoded format information pattern.
2488:      * @param $mask (array)
2489:      * @param $level (int) error correction level
2490:      * @return BCH encoded format information pattern
2491:      */
2492:     protected function getFormatInfo($mask, $level) {
2493:         if (($mask < 0) OR ($mask > 7)) {
2494:             return 0;
2495:         }
2496:         if (($level < 0) OR ($level > 3)) {
2497:             return 0;
2498:         }
2499:         return $this->formatInfo[$level][$mask];
2500:     }
2501: 
2502:     /**
2503:      * Put a finder pattern.
2504:      * @param $frame (array) frame
2505:      * @param $ox (int) X center coordinate of the pattern
2506:      * @param $oy (int) Y center coordinate of the pattern
2507:      * @return array frame
2508:      */
2509:     protected function putFinderPattern($frame, $ox, $oy) {
2510:         $finder = array(
2511:         "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
2512:         "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2513:         "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2514:         "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2515:         "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2516:         "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2517:         "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
2518:         );
2519:         for ($y=0; $y < 7; $y++) {
2520:             $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
2521:         }
2522:         return $frame;
2523:     }
2524: 
2525:     /**
2526:      * Return a copy of initialized frame.
2527:      * @param $version (int) version
2528:      * @return Array of unsigned char.
2529:      */
2530:     protected function createFrame($version) {
2531:         $width = $this->capacity[$version][QRCAP_WIDTH];
2532:         $frameLine = str_repeat ("\0", $width);
2533:         $frame = array_fill(0, $width, $frameLine);
2534:         // Finder pattern
2535:         $frame = $this->putFinderPattern($frame, 0, 0);
2536:         $frame = $this->putFinderPattern($frame, $width - 7, 0);
2537:         $frame = $this->putFinderPattern($frame, 0, $width - 7);
2538:         // Separator
2539:         $yOffset = $width - 7;
2540:         for ($y=0; $y < 7; ++$y) {
2541:             $frame[$y][7] = "\xc0";
2542:             $frame[$y][$width - 8] = "\xc0";
2543:             $frame[$yOffset][7] = "\xc0";
2544:             ++$yOffset;
2545:         }
2546:         $setPattern = str_repeat("\xc0", 8);
2547:         $frame = $this->qrstrset($frame, 0, 7, $setPattern);
2548:         $frame = $this->qrstrset($frame, $width-8, 7, $setPattern);
2549:         $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
2550:         // Format info
2551:         $setPattern = str_repeat("\x84", 9);
2552:         $frame = $this->qrstrset($frame, 0, 8, $setPattern);
2553:         $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8);
2554:         $yOffset = $width - 8;
2555:         for ($y=0; $y < 8; ++$y,++$yOffset) {
2556:             $frame[$y][8] = "\x84";
2557:             $frame[$yOffset][8] = "\x84";
2558:         }
2559:         // Timing pattern
2560:         $wo = $width - 15;
2561:         for ($i=1; $i < $wo; ++$i) {
2562:             $frame[6][7+$i] = chr(0x90 | ($i & 1));
2563:             $frame[7+$i][6] = chr(0x90 | ($i & 1));
2564:         }
2565:         // Alignment pattern
2566:         $frame = $this->putAlignmentPattern($version, $frame, $width);
2567:         // Version information
2568:         if ($version >= 7) {
2569:             $vinf = $this->getVersionPattern($version);
2570:             $v = $vinf;
2571:             for ($x=0; $x<6; ++$x) {
2572:                 for ($y=0; $y<3; ++$y) {
2573:                     $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
2574:                     $v = $v >> 1;
2575:                 }
2576:             }
2577:             $v = $vinf;
2578:             for ($y=0; $y<6; ++$y) {
2579:                 for ($x=0; $x<3; ++$x) {
2580:                     $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
2581:                     $v = $v >> 1;
2582:                 }
2583:             }
2584:         }
2585:         // and a little bit...
2586:         $frame[$width - 8][8] = "\x81";
2587:         return $frame;
2588:     }
2589: 
2590:     /**
2591:      * Set new frame for the specified version.
2592:      * @param $version (int) version
2593:      * @return Array of unsigned char.
2594:      */
2595:     protected function newFrame($version) {
2596:         if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) {
2597:             return NULL;
2598:         }
2599:         if (!isset($this->frames[$version])) {
2600:             $this->frames[$version] = $this->createFrame($version);
2601:         }
2602:         if (is_null($this->frames[$version])) {
2603:             return NULL;
2604:         }
2605:         return $this->frames[$version];
2606:     }
2607: 
2608:     /**
2609:      * Return block number 0
2610:      * @param $spec (array)
2611:      * @return int value
2612:      */
2613:      protected function rsBlockNum($spec) {
2614:         return ($spec[0] + $spec[3]);
2615:     }
2616: 
2617:     /**
2618:     * Return block number 1
2619:      * @param $spec (array)
2620:      * @return int value
2621:      */
2622:      protected function rsBlockNum1($spec) {
2623:         return $spec[0];
2624:     }
2625: 
2626:     /**
2627:      * Return data codes 1
2628:      * @param $spec (array)
2629:      * @return int value
2630:      */
2631:      protected function rsDataCodes1($spec) {
2632:         return $spec[1];
2633:     }
2634: 
2635:     /**
2636:      * Return ecc codes 1
2637:      * @param $spec (array)
2638:      * @return int value
2639:      */
2640:      protected function rsEccCodes1($spec) {
2641:         return $spec[2];
2642:     }
2643: 
2644:     /**
2645:      * Return block number 2
2646:      * @param $spec (array)
2647:      * @return int value
2648:      */
2649:      protected function rsBlockNum2($spec) {
2650:         return $spec[3];
2651:     }
2652: 
2653:     /**
2654:      * Return data codes 2
2655:      * @param $spec (array)
2656:      * @return int value
2657:      */
2658:      protected function rsDataCodes2($spec) {
2659:         return $spec[4];
2660:     }
2661: 
2662:     /**
2663:      * Return ecc codes 2
2664:      * @param $spec (array)
2665:      * @return int value
2666:      */
2667:      protected function rsEccCodes2($spec) {
2668:         return $spec[2];
2669:     }
2670: 
2671:     /**
2672:      * Return data length
2673:      * @param $spec (array)
2674:      * @return int value
2675:      */
2676:      protected function rsDataLength($spec) {
2677:         return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
2678:     }
2679: 
2680:     /**
2681:      * Return ecc length
2682:      * @param $spec (array)
2683:      * @return int value
2684:      */
2685:      protected function rsEccLength($spec) {
2686:         return ($spec[0] + $spec[3]) * $spec[2];
2687:     }
2688: 
2689:     // - - - - - - - - - - - - - - - - - - - - - - - - -
2690: 
2691:     // QRrs
2692: 
2693:     /**
2694:      * Initialize a Reed-Solomon codec and add it to existing rsitems
2695:      * @param $symsize (int) symbol size, bits
2696:      * @param $gfpoly (int)  Field generator polynomial coefficients
2697:      * @param $fcr (int)  first root of RS code generator polynomial, index form
2698:      * @param $prim (int)  primitive element to generate polynomial roots
2699:      * @param $nroots (int) RS code generator polynomial degree (number of roots)
2700:      * @param $pad (int)  padding bytes at front of shortened block
2701:      * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2702:      */
2703:      protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2704:         foreach ($this->rsitems as $rs) {
2705:             if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize)
2706:                 OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) {
2707:                 continue;
2708:             }
2709:             return $rs;
2710:         }
2711:         $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);
2712:         array_unshift($this->rsitems, $rs);
2713:         return $rs;
2714:     }
2715: 
2716:     // - - - - - - - - - - - - - - - - - - - - - - - - -
2717: 
2718:     // QRrsItem
2719: 
2720:     /**
2721:      * modnn
2722:      * @param $rs (array) RS values
2723:      * @param $x (int) X position
2724:      * @return int X osition
2725:      */
2726:      protected function modnn($rs, $x) {
2727:         while ($x >= $rs['nn']) {
2728:             $x -= $rs['nn'];
2729:             $x = ($x >> $rs['mm']) + ($x & $rs['nn']);
2730:         }
2731:         return $x;
2732:     }
2733: 
2734:     /**
2735:      * Initialize a Reed-Solomon codec and returns an array of values.
2736:      * @param $symsize (int) symbol size, bits
2737:      * @param $gfpoly (int)  Field generator polynomial coefficients
2738:      * @param $fcr (int)  first root of RS code generator polynomial, index form
2739:      * @param $prim (int)  primitive element to generate polynomial roots
2740:      * @param $nroots (int) RS code generator polynomial degree (number of roots)
2741:      * @param $pad (int)  padding bytes at front of shortened block
2742:      * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2743:      */
2744:     protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2745:         // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
2746:         $rs = null;
2747:         // Check parameter ranges
2748:         if (($symsize < 0) OR ($symsize > 8)) {
2749:             return $rs;
2750:         }
2751:         if (($fcr < 0) OR ($fcr >= (1<<$symsize))) {
2752:             return $rs;
2753:         }
2754:         if (($prim <= 0) OR ($prim >= (1<<$symsize))) {
2755:             return $rs;
2756:         }
2757:         if (($nroots < 0) OR ($nroots >= (1<<$symsize))) {
2758:             return $rs;
2759:         }
2760:         if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) {
2761:             return $rs;
2762:         }
2763:         $rs = array();
2764:         $rs['mm'] = $symsize;
2765:         $rs['nn'] = (1 << $symsize) - 1;
2766:         $rs['pad'] = $pad;
2767:         $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0);
2768:         $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0);
2769:         // PHP style macro replacement ;)
2770:         $NN =& $rs['nn'];
2771:         $A0 =& $NN;
2772:         // Generate Galois field lookup tables
2773:         $rs['index_of'][0] = $A0; // log(zero) = -inf
2774:         $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
2775:         $sr = 1;
2776:         for ($i=0; $i<$rs['nn']; ++$i) {
2777:             $rs['index_of'][$sr] = $i;
2778:             $rs['alpha_to'][$i] = $sr;
2779:             $sr <<= 1;
2780:             if ($sr & (1 << $symsize)) {
2781:                 $sr ^= $gfpoly;
2782:             }
2783:             $sr &= $rs['nn'];
2784:         }
2785:         if ($sr != 1) {
2786:             // field generator polynomial is not primitive!
2787:             return NULL;
2788:         }
2789:         // Form RS code generator polynomial from its roots
2790:         $rs['genpoly'] = array_fill(0, ($nroots + 1), 0);
2791:         $rs['fcr'] = $fcr;
2792:         $rs['prim'] = $prim;
2793:         $rs['nroots'] = $nroots;
2794:         $rs['gfpoly'] = $gfpoly;
2795:         // Find prim-th root of 1, used in decoding
2796:         for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) {
2797:             ; // intentional empty-body loop!
2798:         }
2799:         $rs['iprim'] = (int)($iprim / $prim);
2800:         $rs['genpoly'][0] = 1;
2801:         for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) {
2802:             $rs['genpoly'][$i+1] = 1;
2803:             // Multiply rs->genpoly[] by  @**(root + x)
2804:             for ($j = $i; $j > 0; --$j) {
2805:                 if ($rs['genpoly'][$j] != 0) {
2806:                     $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];
2807:                 } else {
2808:                     $rs['genpoly'][$j] = $rs['genpoly'][$j-1];
2809:                 }
2810:             }
2811:             // rs->genpoly[0] can never be zero
2812:             $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
2813:         }
2814:         // convert rs->genpoly[] to index form for quicker encoding
2815:         for ($i = 0; $i <= $nroots; ++$i) {
2816:             $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
2817:         }
2818:         return $rs;
2819:     }
2820: 
2821:     /**
2822:      * Encode a Reed-Solomon codec and returns the parity array
2823:      * @param $rs (array) RS values
2824:      * @param $data (array) data
2825:      * @param $parity (array) parity
2826:      * @return parity array
2827:      */
2828:      protected function encode_rs_char($rs, $data, $parity) {
2829:         $MM       =& $rs['mm']; // bits per symbol
2830:         $NN       =& $rs['nn']; // the total number of symbols in a RS block
2831:         $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
2832:         $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
2833:         $GENPOLY  =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
2834:         $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
2835:         $FCR      =& $rs['fcr']; // first consecutive root, index form
2836:         $PRIM     =& $rs['prim']; // primitive element, index form
2837:         $IPRIM    =& $rs['iprim']; // prim-th root of 1, index form
2838:         $PAD      =& $rs['pad']; // the number of pad symbols in a block
2839:         $A0       =& $NN;
2840:         $parity = array_fill(0, $NROOTS, 0);
2841:         for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) {
2842:             $feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
2843:             if ($feedback != $A0) {
2844:                 // feedback term is non-zero
2845:                 // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
2846:                 // always be for the polynomials constructed by init_rs()
2847:                 $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
2848:                 for ($j=1; $j < $NROOTS; ++$j) {
2849:                 $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
2850:                 }
2851:             }
2852:             // Shift
2853:             array_shift($parity);
2854:             if ($feedback != $A0) {
2855:                 array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]);
2856:             } else {
2857:                 array_push($parity, 0);
2858:             }
2859:         }
2860:         return $parity;
2861:     }
2862: 
2863: } // end QRcode class
2864: 
2865: //============================================================+
2866: // END OF FILE
2867: //============================================================+
2868: 
 

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