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1 <?php 2 //============================================================+ 3 // File name : qrcode.php 4 // Begin : 2010-03-22 5 // Last Update : 2010-03-30 6 // Version : 1.0.003 7 // License : GNU LGPL v.3 (http://www.gnu.org/copyleft/lesser.html) 8 // ---------------------------------------------------------------------------- 9 // 10 // This library is free software; you can redistribute it and/or 11 // modify it under the terms of the GNU Lesser General Public 12 // License as published by the Free Software Foundation; either 13 // version 3 of the License, or any later version. 14 // 15 // This library is distributed in the hope that it will be useful, 16 // but WITHOUT ANY WARRANTY; without even the implied warranty of 17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 // Lesser General Public License for more details. 19 // 20 // You should have received a copy of the GNU Lesser General Public 21 // License along with this library; if not, write to the Free Software 22 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 23 // or browse http://www.gnu.org/copyleft/lesser.html 24 // 25 // ---------------------------------------------------------------------------- 26 // 27 // DESCRIPTION : 28 // 29 // Class to create QR-code arrays for TCPDF class. 30 // QR Code symbol is a 2D barcode that can be scanned by 31 // handy terminals such as a mobile phone with CCD. 32 // The capacity of QR Code is up to 7000 digits or 4000 33 // characters, and has high robustness. 34 // This class supports QR Code model 2, described in 35 // JIS (Japanese Industrial Standards) X0510:2004 36 // or ISO/IEC 18004. 37 // Currently the following features are not supported: 38 // ECI and FNC1 mode, Micro QR Code, QR Code model 1, 39 // Structured mode. 40 // 41 // This class is derived from the following projects: 42 // --------------------------------------------------------- 43 // "PHP QR Code encoder" 44 // License: GNU-LGPLv3 45 // Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm> 46 // http://phpqrcode.sourceforge.net/ 47 // https://sourceforge.net/projects/phpqrcode/ 48 // 49 // The "PHP QR Code encoder" is based on 50 // "C libqrencode library" (ver. 3.1.1) 51 // License: GNU-LGPL 2.1 52 // Copyright (C) 2006-2010 by Kentaro Fukuchi 53 // http://megaui.net/fukuchi/works/qrencode/index.en.html 54 // 55 // Reed-Solomon code encoder is written by Phil Karn, KA9Q. 56 // Copyright (C) 2002-2006 Phil Karn, KA9Q 57 // 58 // QR Code is registered trademark of DENSO WAVE INCORPORATED 59 // http://www.denso-wave.com/qrcode/index-e.html 60 // --------------------------------------------------------- 61 // 62 // Author: Nicola Asuni 63 // 64 // (c) Copyright 2010: 65 // Nicola Asuni 66 // Tecnick.com S.r.l. 67 // Via della Pace, 11 68 // 09044 Quartucciu (CA) 69 // ITALY 70 // www.tecnick.com 71 // info@tecnick.com 72 //============================================================+ 73 74 /** 75 * Class to create QR-code arrays for TCPDF class. 76 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD. 77 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. 78 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. 79 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode. 80 * 81 * 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). 82 * Please read comments on this class source file for full copyright and license information. 83 * 84 * @package com.tecnick.tcpdf 85 * @abstract Class for generating QR-code array for TCPDF. 86 * @author Nicola Asuni 87 * @copyright 2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com 88 * @link http://www.tcpdf.org 89 * @license http://www.gnu.org/copyleft/lesser.html LGPL 90 * @version 1.0.003 91 */ 92 93 // definitions 94 if (!defined('QRCODEDEFS')) { 95 96 /** 97 * Indicate that definitions for this class are set 98 */ 99 define('QRCODEDEFS', true); 100 101 // ----------------------------------------------------- 102 103 // Encoding modes (characters which can be encoded in QRcode) 104 105 /** 106 * Encoding mode 107 */ 108 define('QR_MODE_NL', -1); 109 110 /** 111 * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode. 112 */ 113 define('QR_MODE_NM', 0); 114 115 /** 116 * 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. 117 */ 118 define('QR_MODE_AN', 1); 119 120 /** 121 * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode. 122 */ 123 define('QR_MODE_8B', 2); 124 125 /** 126 * 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. 127 */ 128 define('QR_MODE_KJ', 3); 129 130 /** 131 * Encoding mode STRUCTURED (currently unsupported) 132 */ 133 define('QR_MODE_ST', 4); 134 135 // ----------------------------------------------------- 136 137 // Levels of error correction. 138 // QRcode has a function of an error correcting for miss reading that white is black. 139 // Error correcting is defined in 4 level as below. 140 141 /** 142 * Error correction level L : About 7% or less errors can be corrected. 143 */ 144 define('QR_ECLEVEL_L', 0); 145 146 /** 147 * Error correction level M : About 15% or less errors can be corrected. 148 */ 149 define('QR_ECLEVEL_M', 1); 150 151 /** 152 * Error correction level Q : About 25% or less errors can be corrected. 153 */ 154 define('QR_ECLEVEL_Q', 2); 155 156 /** 157 * Error correction level H : About 30% or less errors can be corrected. 158 */ 159 define('QR_ECLEVEL_H', 3); 160 161 // ----------------------------------------------------- 162 163 // Version. Size of QRcode is defined as version. 164 // Version is from 1 to 40. 165 // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. 166 // So version 40 is 177*177 matrix. 167 168 /** 169 * Maximum QR Code version. 170 */ 171 define('QRSPEC_VERSION_MAX', 40); 172 173 /** 174 * Maximum matrix size for maximum version (version 40 is 177*177 matrix). 175 */ 176 define('QRSPEC_WIDTH_MAX', 177); 177 178 // ----------------------------------------------------- 179 180 /** 181 * Matrix index to get width from $capacity array. 182 */ 183 define('QRCAP_WIDTH', 0); 184 185 /** 186 * Matrix index to get number of words from $capacity array. 187 */ 188 define('QRCAP_WORDS', 1); 189 190 /** 191 * Matrix index to get remainder from $capacity array. 192 */ 193 define('QRCAP_REMINDER', 2); 194 195 /** 196 * Matrix index to get error correction level from $capacity array. 197 */ 198 define('QRCAP_EC', 3); 199 200 // ----------------------------------------------------- 201 202 // Structure (currently usupported) 203 204 /** 205 * Number of header bits for structured mode 206 */ 207 define('STRUCTURE_HEADER_BITS', 20); 208 209 /** 210 * Max number of symbols for structured mode 211 */ 212 define('MAX_STRUCTURED_SYMBOLS', 16); 213 214 // ----------------------------------------------------- 215 216 // Masks 217 218 /** 219 * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column) 220 */ 221 define('N1', 3); 222 223 /** 224 * Down point base value for case 2 mask pattern (module block of same color) 225 */ 226 define('N2', 3); 227 228 /** 229 * 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) 230 */ 231 define('N3', 40); 232 233 /** 234 * Down point base value for case 4 mask pattern (ration of dark modules in whole) 235 */ 236 define('N4', 10); 237 238 // ----------------------------------------------------- 239 240 // Optimization settings 241 242 /** 243 * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code 244 */ 245 define('QR_FIND_BEST_MASK', true); 246 247 /** 248 * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly 249 */ 250 define('QR_FIND_FROM_RANDOM', 2); 251 252 /** 253 * when QR_FIND_BEST_MASK === false 254 */ 255 define('QR_DEFAULT_MASK', 2); 256 257 // ----------------------------------------------------- 258 259 } // end of definitions 260 261 // #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*# 262 263 if (!class_exists('QRcode', false)) { 264 265 // for compaibility with PHP4 266 if (!function_exists('str_split')) { 267 /** 268 * Convert a string to an array (needed for PHP4 compatibility) 269 * @param string $string The input string. 270 * @param int $split_length Maximum length of the chunk. 271 * @return If the optional split_length parameter is specified, the returned array will be broken down into chunks with each being split_length in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element. 272 */ 273 function str_split($string, $split_length=1) { 274 if ((strlen($string) > $split_length) OR (!$split_length)) { 275 do { 276 $c = strlen($string); 277 $parts[] = substr($string, 0, $split_length); 278 $string = substr($string, $split_length); 279 } while ($string !== false); 280 } else { 281 $parts = array($string); 282 } 283 return $parts; 284 } 285 } 286 287 // ##################################################### 288 289 /** 290 * Class to create QR-code arrays for TCPDF class. 291 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD. 292 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. 293 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. 294 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode. 295 * 296 * 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). 297 * Please read comments on this class source file for full copyright and license information. 298 * 299 * @name QRcode 300 * @package com.tecnick.tcpdf 301 * @abstract Class for generating QR-code array for TCPDF. 302 * @author Nicola Asuni 303 * @copyright 2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com 304 * @link http://www.tcpdf.org 305 * @license http://www.gnu.org/copyleft/lesser.html LGPL 306 * @version 1.0.002 307 */ 308 class QRcode { 309 310 /** 311 * @var barcode array to be returned which is readable by TCPDF 312 * @access protected 313 */ 314 protected $barcode_array = array(); 315 316 /** 317 * @var QR code version. Size of QRcode is defined as version. Version is from 1 to 40. Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases. So version 40 is 177*177 matrix. 318 * @access protected 319 */ 320 protected $version = 0; 321 322 /** 323 * @var Levels of error correction. See definitions for possible values. 324 * @access protected 325 */ 326 protected $level = QR_ECLEVEL_L; 327 328 /** 329 * @var Encoding mode 330 * @access protected 331 */ 332 protected $hint = QR_MODE_8B; 333 334 /** 335 * @var if true the input string will be converted to uppercase 336 * @access protected 337 */ 338 protected $casesensitive = true; 339 340 /** 341 * @var structured QR code (not supported yet) 342 * @access protected 343 */ 344 protected $structured = 0; 345 346 /** 347 * @var mask data 348 * @access protected 349 */ 350 protected $data; 351 352 // FrameFiller 353 354 /** 355 * @var width 356 * @access protected 357 */ 358 protected $width; 359 360 /** 361 * @var frame 362 * @access protected 363 */ 364 protected $frame; 365 366 /** 367 * @var X position of bit 368 * @access protected 369 */ 370 protected $x; 371 372 /** 373 * @var Y position of bit 374 * @access protected 375 */ 376 protected $y; 377 378 /** 379 * @var direction 380 * @access protected 381 */ 382 protected $dir; 383 384 /** 385 * @var single bit 386 * @access protected 387 */ 388 protected $bit; 389 390 // ---- QRrawcode ---- 391 392 /** 393 * @var data code 394 * @access protected 395 */ 396 protected $datacode = array(); 397 398 /** 399 * @var error correction code 400 * @access protected 401 */ 402 protected $ecccode = array(); 403 404 /** 405 * @var blocks 406 * @access protected 407 */ 408 protected $blocks; 409 410 /** 411 * @var Reed-Solomon blocks 412 * @access protected 413 */ 414 protected $rsblocks = array(); //of RSblock 415 416 /** 417 * @var counter 418 * @access protected 419 */ 420 protected $count; 421 422 /** 423 * @var data length 424 * @access protected 425 */ 426 protected $dataLength; 427 428 /** 429 * @var error correction length 430 * @access protected 431 */ 432 protected $eccLength; 433 434 /** 435 * @var b1 436 * @access protected 437 */ 438 protected $b1; 439 440 // ---- QRmask ---- 441 442 /** 443 * @var run length 444 * @access protected 445 */ 446 protected $runLength = array(); 447 448 // ---- QRsplit ---- 449 450 /** 451 * @var input data string 452 * @access protected 453 */ 454 protected $dataStr = ''; 455 456 /** 457 * @var input items 458 * @access protected 459 */ 460 protected $items; 461 462 // Reed-Solomon items 463 464 /** 465 * @var Reed-Solomon items 466 * @access protected 467 */ 468 protected $rsitems = array(); 469 470 /** 471 * @var array of frames 472 * @access protected 473 */ 474 protected $frames = array(); 475 476 /** 477 * @var alphabet-numeric convesion table 478 * @access protected 479 */ 480 protected $anTable = array( 481 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 482 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 483 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, // 484 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, // 485 -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, // 486 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, // 487 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 488 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // 489 ); 490 491 /** 492 * @var array Table of the capacity of symbols 493 * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004. 494 * @access protected 495 */ 496 protected $capacity = array( 497 array( 0, 0, 0, array( 0, 0, 0, 0)), // 498 array( 21, 26, 0, array( 7, 10, 13, 17)), // 1 499 array( 25, 44, 7, array( 10, 16, 22, 28)), // 500 array( 29, 70, 7, array( 15, 26, 36, 44)), // 501 array( 33, 100, 7, array( 20, 36, 52, 64)), // 502 array( 37, 134, 7, array( 26, 48, 72, 88)), // 5 503 array( 41, 172, 7, array( 36, 64, 96, 112)), // 504 array( 45, 196, 0, array( 40, 72, 108, 130)), // 505 array( 49, 242, 0, array( 48, 88, 132, 156)), // 506 array( 53, 292, 0, array( 60, 110, 160, 192)), // 507 array( 57, 346, 0, array( 72, 130, 192, 224)), // 10 508 array( 61, 404, 0, array( 80, 150, 224, 264)), // 509 array( 65, 466, 0, array( 96, 176, 260, 308)), // 510 array( 69, 532, 0, array( 104, 198, 288, 352)), // 511 array( 73, 581, 3, array( 120, 216, 320, 384)), // 512 array( 77, 655, 3, array( 132, 240, 360, 432)), // 15 513 array( 81, 733, 3, array( 144, 280, 408, 480)), // 514 array( 85, 815, 3, array( 168, 308, 448, 532)), // 515 array( 89, 901, 3, array( 180, 338, 504, 588)), // 516 array( 93, 991, 3, array( 196, 364, 546, 650)), // 517 array( 97, 1085, 3, array( 224, 416, 600, 700)), // 20 518 array(101, 1156, 4, array( 224, 442, 644, 750)), // 519 array(105, 1258, 4, array( 252, 476, 690, 816)), // 520 array(109, 1364, 4, array( 270, 504, 750, 900)), // 521 array(113, 1474, 4, array( 300, 560, 810, 960)), // 522 array(117, 1588, 4, array( 312, 588, 870, 1050)), // 25 523 array(121, 1706, 4, array( 336, 644, 952, 1110)), // 524 array(125, 1828, 4, array( 360, 700, 1020, 1200)), // 525 array(129, 1921, 3, array( 390, 728, 1050, 1260)), // 526 array(133, 2051, 3, array( 420, 784, 1140, 1350)), // 527 array(137, 2185, 3, array( 450, 812, 1200, 1440)), // 30 528 array(141, 2323, 3, array( 480, 868, 1290, 1530)), // 529 array(145, 2465, 3, array( 510, 924, 1350, 1620)), // 530 array(149, 2611, 3, array( 540, 980, 1440, 1710)), // 531 array(153, 2761, 3, array( 570, 1036, 1530, 1800)), // 532 array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35 533 array(161, 3034, 0, array( 600, 1120, 1680, 1980)), // 534 array(165, 3196, 0, array( 630, 1204, 1770, 2100)), // 535 array(169, 3362, 0, array( 660, 1260, 1860, 2220)), // 536 array(173, 3532, 0, array( 720, 1316, 1950, 2310)), // 537 array(177, 3706, 0, array( 750, 1372, 2040, 2430)) // 40 538 ); 539 540 /** 541 * @var array Length indicator 542 * @access protected 543 */ 544 protected $lengthTableBits = array( 545 array(10, 12, 14), 546 array( 9, 11, 13), 547 array( 8, 16, 16), 548 array( 8, 10, 12) 549 ); 550 551 /** 552 * @var array Table of the error correction code (Reed-Solomon block) 553 * See Table 12-16 (pp.30-36), JIS X0510:2004. 554 * @access protected 555 */ 556 protected $eccTable = array( 557 array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)), // 558 array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1 559 array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 560 array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)), // 561 array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)), // 562 array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5 563 array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)), // 564 array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)), // 565 array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)), // 566 array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)), // 567 array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), // 10 568 array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)), // 569 array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)), // 570 array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)), // 571 array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)), // 572 array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), // 15 573 array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)), // 574 array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)), // 575 array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)), // 576 array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)), // 577 array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), // 20 578 array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)), // 579 array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)), // 580 array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)), // 581 array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)), // 582 array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), // 25 583 array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)), // 584 array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)), // 585 array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), // 586 array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)), // 587 array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30 588 array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)), // 589 array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)), // 590 array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)), // 591 array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)), // 592 array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), // 35 593 array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), // 594 array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)), // 595 array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), // 596 array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)), // 597 array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)) // 40 598 ); 599 600 /** 601 * @var array Positions of alignment patterns. 602 * 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. 603 * See Table 1 in Appendix E (pp.71) of JIS X0510:2004. 604 * @access protected 605 */ 606 protected $alignmentPattern = array( 607 array( 0, 0), 608 array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5 609 array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10 610 array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15 611 array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20 612 array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25 613 array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30 614 array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35 615 array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58) // 35-40 616 ); 617 618 /** 619 * @var array Version information pattern (BCH coded). 620 * See Table 1 in Appendix D (pp.68) of JIS X0510:2004. 621 * size: [QRSPEC_VERSION_MAX - 6] 622 * @access protected 623 */ 624 protected $versionPattern = array( 625 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, // 626 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, // 627 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, // 628 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, // 629 0x27541, 0x28c69 630 ); 631 632 /** 633 * @var array Format information 634 * @access protected 635 */ 636 protected $formatInfo = array( 637 array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), // 638 array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), // 639 array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), // 640 array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b) // 641 ); 642 643 644 // ------------------------------------------------- 645 // ------------------------------------------------- 646 647 648 /** 649 * This is the class constructor. 650 * Creates a QRcode object 651 * @param string $code code to represent using QRcode 652 * @param string $eclevel error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul> 653 * @access public 654 * @since 1.0.000 655 */ 656 public function __construct($code, $eclevel = 'L') { 657 $barcode_array = array(); 658 if ((is_null($code)) OR ($code == '\0') OR ($code == '')) { 659 return false; 660 } 661 // set error correction level 662 $this->level = array_search($eclevel, array('L', 'M', 'Q', 'H')); 663 if ($this->level === false) { 664 $this->level = QR_ECLEVEL_L; 665 } 666 if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) { 667 return false; 668 } 669 if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) { 670 return false; 671 } 672 $this->items = array(); 673 $this->encodeString($code); 674 $qrTab = $this->binarize($this->data); 675 $size = count($qrTab); 676 $barcode_array['num_rows'] = $size; 677 $barcode_array['num_cols'] = $size; 678 $barcode_array['bcode'] = array(); 679 foreach ($qrTab as $line) { 680 $arrAdd = array(); 681 foreach (str_split($line) as $char) { 682 $arrAdd[] = ($char=='1')?1:0; 683 } 684 $barcode_array['bcode'][] = $arrAdd; 685 } 686 $this->barcode_array = $barcode_array; 687 } 688 689 /** 690 * Returns a barcode array which is readable by TCPDF 691 * @return array barcode array readable by TCPDF; 692 * @access public 693 */ 694 public function getBarcodeArray() { 695 return $this->barcode_array; 696 } 697 698 /** 699 * Convert the frame in binary form 700 * @param array $frame array to binarize 701 * @return array frame in binary form 702 */ 703 protected function binarize($frame) { 704 $len = count($frame); 705 // the frame is square (width = height) 706 foreach ($frame as &$frameLine) { 707 for ($i=0; $i<$len; $i++) { 708 $frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0'; 709 } 710 } 711 return $frame; 712 } 713 714 /** 715 * Encode the input string to QR code 716 * @param string $string input string to encode 717 */ 718 protected function encodeString($string) { 719 $this->dataStr = $string; 720 if (!$this->casesensitive) { 721 $this->toUpper(); 722 } 723 $ret = $this->splitString(); 724 if ($ret < 0) { 725 return NULL; 726 } 727 $this->encodeMask(-1); 728 } 729 730 /** 731 * Encode mask 732 * @param int $mask masking mode 733 */ 734 protected function encodeMask($mask) { 735 $spec = array(0, 0, 0, 0, 0); 736 $this->datacode = $this->getByteStream($this->items); 737 if (is_null($this->datacode)) { 738 return NULL; 739 } 740 $spec = $this->getEccSpec($this->version, $this->level, $spec); 741 $this->b1 = $this->rsBlockNum1($spec); 742 $this->dataLength = $this->rsDataLength($spec); 743 $this->eccLength = $this->rsEccLength($spec); 744 $this->ecccode = array_fill(0, $this->eccLength, 0); 745 $this->blocks = $this->rsBlockNum($spec); 746 $ret = $this->init($spec); 747 if ($ret < 0) { 748 return NULL; 749 } 750 $this->count = 0; 751 $this->width = $this->getWidth($this->version); 752 $this->frame = $this->newFrame($this->version); 753 $this->x = $this->width - 1; 754 $this->y = $this->width - 1; 755 $this->dir = -1; 756 $this->bit = -1; 757 // inteleaved data and ecc codes 758 for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) { 759 $code = $this->getCode(); 760 $bit = 0x80; 761 for ($j=0; $j<8; $j++) { 762 $addr = $this->getNextPosition(); 763 $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0)); 764 $bit = $bit >> 1; 765 } 766 } 767 // remainder bits 768 $j = $this->getRemainder($this->version); 769 for ($i=0; $i<$j; $i++) { 770 $addr = $this->getNextPosition(); 771 $this->setFrameAt($addr, 0x02); 772 } 773 // masking 774 $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0); 775 if ($mask < 0) { 776 if (QR_FIND_BEST_MASK) { 777 $masked = $this->mask($this->width, $this->frame, $this->level); 778 } else { 779 $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level); 780 } 781 } else { 782 $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level); 783 } 784 if ($masked == NULL) { 785 return NULL; 786 } 787 $this->data = $masked; 788 } 789 790 // - - - - - - - - - - - - - - - - - - - - - - - - - 791 792 // FrameFiller 793 794 /** 795 * Set frame value at specified position 796 * @param array $at x,y position 797 * @param int $val value of the character to set 798 */ 799 protected function setFrameAt($at, $val) { 800 $this->frame[$at['y']][$at['x']] = chr($val); 801 } 802 803 /** 804 * Get frame value at specified position 805 * @param array $at x,y position 806 * @return value at specified position 807 */ 808 protected function getFrameAt($at) { 809 return ord($this->frame[$at['y']][$at['x']]); 810 } 811 812 /** 813 * Return the next frame position 814 * @return array of x,y coordinates 815 */ 816 protected function getNextPosition() { 817 do { 818 if ($this->bit == -1) { 819 $this->bit = 0; 820 return array('x'=>$this->x, 'y'=>$this->y); 821 } 822 $x = $this->x; 823 $y = $this->y; 824 $w = $this->width; 825 if ($this->bit == 0) { 826 $x--; 827 $this->bit++; 828 } else { 829 $x++; 830 $y += $this->dir; 831 $this->bit--; 832 } 833 if ($this->dir < 0) { 834 if ($y < 0) { 835 $y = 0; 836 $x -= 2; 837 $this->dir = 1; 838 if ($x == 6) { 839 $x--; 840 $y = 9; 841 } 842 } 843 } else { 844 if ($y == $w) { 845 $y = $w - 1; 846 $x -= 2; 847 $this->dir = -1; 848 if ($x == 6) { 849 $x--; 850 $y -= 8; 851 } 852 } 853 } 854 if (($x < 0) OR ($y < 0)) { 855 return NULL; 856 } 857 $this->x = $x; 858 $this->y = $y; 859 } while(ord($this->frame[$y][$x]) & 0x80); 860 return array('x'=>$x, 'y'=>$y); 861 } 862 863 // - - - - - - - - - - - - - - - - - - - - - - - - - 864 865 // QRrawcode 866 867 /** 868 * Initialize code. 869 * @param array $spec array of ECC specification 870 * @return 0 in case of success, -1 in case of error 871 */ 872 protected function init($spec) { 873 $dl = $this->rsDataCodes1($spec); 874 $el = $this->rsEccCodes1($spec); 875 $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el); 876 $blockNo = 0; 877 $dataPos = 0; 878 $eccPos = 0; 879 $endfor = $this->rsBlockNum1($spec); 880 for ($i=0; $i < $endfor; ++$i) { 881 $ecc = array_slice($this->ecccode, $eccPos); 882 $this->rsblocks[$blockNo] = array(); 883 $this->rsblocks[$blockNo]['dataLength'] = $dl; 884 $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos); 885 $this->rsblocks[$blockNo]['eccLength'] = $el; 886 $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc); 887 $this->rsblocks[$blockNo]['ecc'] = $ecc; 888 $this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc); 889 $dataPos += $dl; 890 $eccPos += $el; 891 $blockNo++; 892 } 893 if ($this->rsBlockNum2($spec) == 0) { 894 return 0; 895 } 896 $dl = $this->rsDataCodes2($spec); 897 $el = $this->rsEccCodes2($spec); 898 $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el); 899 if ($rs == NULL) { 900 return -1; 901 } 902 $endfor = $this->rsBlockNum2($spec); 903 for ($i=0; $i < $endfor; ++$i) { 904 $ecc = array_slice($this->ecccode, $eccPos); 905 $this->rsblocks[$blockNo] = array(); 906 $this->rsblocks[$blockNo]['dataLength'] = $dl; 907 $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos); 908 $this->rsblocks[$blockNo]['eccLength'] = $el; 909 $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc); 910 $this->rsblocks[$blockNo]['ecc'] = $ecc; 911 $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc); 912 $dataPos += $dl; 913 $eccPos += $el; 914 $blockNo++; 915 } 916 return 0; 917 } 918 919 /** 920 * Return Reed-Solomon block code. 921 * @return array rsblocks 922 */ 923 protected function getCode() { 924 if ($this->count < $this->dataLength) { 925 $row = $this->count % $this->blocks; 926 $col = $this->count / $this->blocks; 927 if ($col >= $this->rsblocks[0]['dataLength']) { 928 $row += $this->b1; 929 } 930 $ret = $this->rsblocks[$row]['data'][$col]; 931 } elseif ($this->count < $this->dataLength + $this->eccLength) { 932 $row = ($this->count - $this->dataLength) % $this->blocks; 933 $col = ($this->count - $this->dataLength) / $this->blocks; 934 $ret = $this->rsblocks[$row]['ecc'][$col]; 935 } else { 936 return 0; 937 } 938 $this->count++; 939 return $ret; 940 } 941 942 // - - - - - - - - - - - - - - - - - - - - - - - - - 943 944 // QRmask 945 946 /** 947 * Write Format Information on frame and returns the number of black bits 948 * @param int $width frame width 949 * @param array $frame frame 950 * @param array $mask masking mode 951 * @param int $level error correction level 952 * @return int blacks 953 */ 954 protected function writeFormatInformation($width, &$frame, $mask, $level) { 955 $blacks = 0; 956 $format = $this->getFormatInfo($mask, $level); 957 for ($i=0; $i<8; ++$i) { 958 if ($format & 1) { 959 $blacks += 2; 960 $v = 0x85; 961 } else { 962 $v = 0x84; 963 } 964 $frame[8][$width - 1 - $i] = chr($v); 965 if ($i < 6) { 966 $frame[$i][8] = chr($v); 967 } else { 968 $frame[$i + 1][8] = chr($v); 969 } 970 $format = $format >> 1; 971 } 972 for ($i=0; $i<7; ++$i) { 973 if ($format & 1) { 974 $blacks += 2; 975 $v = 0x85; 976 } else { 977 $v = 0x84; 978 } 979 $frame[$width - 7 + $i][8] = chr($v); 980 if ($i == 0) { 981 $frame[8][7] = chr($v); 982 } else { 983 $frame[8][6 - $i] = chr($v); 984 } 985 $format = $format >> 1; 986 } 987 return $blacks; 988 } 989 990 /** 991 * mask0 992 * @param int $x X position 993 * @param int $y Y position 994 * @return int mask 995 */ 996 protected function mask0($x, $y) { 997 return ($x + $y) & 1; 998 } 999 1000 /** 1001 * mask1 1002 * @param int $x X position 1003 * @param int $y Y position 1004 * @return int mask 1005 */ 1006 protected function mask1($x, $y) { 1007 return ($y & 1); 1008 } 1009 1010 /** 1011 * mask2 1012 * @param int $x X position 1013 * @param int $y Y position 1014 * @return int mask 1015 */ 1016 protected function mask2($x, $y) { 1017 return ($x % 3); 1018 } 1019 1020 /** 1021 * mask3 1022 * @param int $x X position 1023 * @param int $y Y position 1024 * @return int mask 1025 */ 1026 protected function mask3($x, $y) { 1027 return ($x + $y) % 3; 1028 } 1029 1030 /** 1031 * mask4 1032 * @param int $x X position 1033 * @param int $y Y position 1034 * @return int mask 1035 */ 1036 protected function mask4($x, $y) { 1037 return (((int)($y / 2)) + ((int)($x / 3))) & 1; 1038 } 1039 1040 /** 1041 * mask5 1042 * @param int $x X position 1043 * @param int $y Y position 1044 * @return int mask 1045 */ 1046 protected function mask5($x, $y) { 1047 return (($x * $y) & 1) + ($x * $y) % 3; 1048 } 1049 1050 /** 1051 * mask6 1052 * @param int $x X position 1053 * @param int $y Y position 1054 * @return int mask 1055 */ 1056 protected function mask6($x, $y) { 1057 return ((($x * $y) & 1) + ($x * $y) % 3) & 1; 1058 } 1059 1060 /** 1061 * mask7 1062 * @param int $x X position 1063 * @param int $y Y position 1064 * @return int mask 1065 */ 1066 protected function mask7($x, $y) { 1067 return ((($x * $y) % 3) + (($x + $y) & 1)) & 1; 1068 } 1069 1070 /** 1071 * Return bitmask 1072 * @param int $maskNo mask number 1073 * @param int $width width 1074 * @param array $frame frame 1075 * @return array bitmask 1076 */ 1077 protected function generateMaskNo($maskNo, $width, $frame) { 1078 $bitMask = array_fill(0, $width, array_fill(0, $width, 0)); 1079 for ($y=0; $y<$width; ++$y) { 1080 for ($x=0; $x<$width; ++$x) { 1081 if (ord($frame[$y][$x]) & 0x80) { 1082 $bitMask[$y][$x] = 0; 1083 } else { 1084 $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y); 1085 $bitMask[$y][$x] = ($maskFunc == 0)?1:0; 1086 } 1087 } 1088 } 1089 return $bitMask; 1090 } 1091 1092 /** 1093 * makeMaskNo 1094 * @param int $maskNo 1095 * @param int $width 1096 * @param int $s 1097 * @param int $d 1098 * @param boolean $maskGenOnly 1099 * @return int b 1100 */ 1101 protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) { 1102 $b = 0; 1103 $bitMask = array(); 1104 $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d); 1105 if ($maskGenOnly) { 1106 return; 1107 } 1108 $d = $s; 1109 for ($y=0; $y<$width; ++$y) { 1110 for ($x=0; $x<$width; ++$x) { 1111 if ($bitMask[$y][$x] == 1) { 1112 $d[$y][$x] = chr(ord($s[$y][$x]) ^ (int)$bitMask[$y][$x]); 1113 } 1114 $b += (int)(ord($d[$y][$x]) & 1); 1115 } 1116 } 1117 return $b; 1118 } 1119 1120 /** 1121 * makeMask 1122 * @param int $width 1123 * @param array $frame 1124 * @param int $maskNo 1125 * @param int $level 1126 * @return array mask 1127 */ 1128 protected function makeMask($width, $frame, $maskNo, $level) { 1129 $masked = array_fill(0, $width, str_repeat("\0", $width)); 1130 $this->makeMaskNo($maskNo, $width, $frame, $masked); 1131 $this->writeFormatInformation($width, $masked, $maskNo, $level); 1132 return $masked; 1133 } 1134 1135 /** 1136 * calcN1N3 1137 * @param int $length 1138 * @return int demerit 1139 */ 1140 protected function calcN1N3($length) { 1141 $demerit = 0; 1142 for ($i=0; $i<$length; ++$i) { 1143 if ($this->runLength[$i] >= 5) { 1144 $demerit += (N1 + ($this->runLength[$i] - 5)); 1145 } 1146 if ($i & 1) { 1147 if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) { 1148 $fact = (int)($this->runLength[$i] / 3); 1149 if (($this->runLength[$i-2] == $fact) 1150 AND ($this->runLength[$i-1] == $fact) 1151 AND ($this->runLength[$i+1] == $fact) 1152 AND ($this->runLength[$i+2] == $fact)) { 1153 if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) { 1154 $demerit += N3; 1155 } elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) { 1156 $demerit += N3; 1157 } 1158 } 1159 } 1160 } 1161 } 1162 return $demerit; 1163 } 1164 1165 /** 1166 * evaluateSymbol 1167 * @param int $width 1168 * @param array $frame 1169 * @return int demerit 1170 */ 1171 protected function evaluateSymbol($width, $frame) { 1172 $head = 0; 1173 $demerit = 0; 1174 for ($y=0; $y<$width; ++$y) { 1175 $head = 0; 1176 $this->runLength[0] = 1; 1177 $frameY = $frame[$y]; 1178 if ($y > 0) { 1179 $frameYM = $frame[$y-1]; 1180 } 1181 for ($x=0; $x<$width; ++$x) { 1182 if (($x > 0) AND ($y > 0)) { 1183 $b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]); 1184 $w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]); 1185 if (($b22 | ($w22 ^ 1)) & 1) { 1186 $demerit += N2; 1187 } 1188 } 1189 if (($x == 0) AND (ord($frameY[$x]) & 1)) { 1190 $this->runLength[0] = -1; 1191 $head = 1; 1192 $this->runLength[$head] = 1; 1193 } elseif ($x > 0) { 1194 if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) { 1195 $head++; 1196 $this->runLength[$head] = 1; 1197 } else { 1198 $this->runLength[$head]++; 1199 } 1200 } 1201 } 1202 $demerit += $this->calcN1N3($head+1); 1203 } 1204 for ($x=0; $x<$width; ++$x) { 1205 $head = 0; 1206 $this->runLength[0] = 1; 1207 for ($y=0; $y<$width; ++$y) { 1208 if (($y == 0) AND (ord($frame[$y][$x]) & 1)) { 1209 $this->runLength[0] = -1; 1210 $head = 1; 1211 $this->runLength[$head] = 1; 1212 } elseif ($y > 0) { 1213 if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) { 1214 $head++; 1215 $this->runLength[$head] = 1; 1216 } else { 1217 $this->runLength[$head]++; 1218 } 1219 } 1220 } 1221 $demerit += $this->calcN1N3($head+1); 1222 } 1223 return $demerit; 1224 } 1225 1226 /** 1227 * mask 1228 * @param int $width 1229 * @param array $frame 1230 * @param int $level 1231 * @return array best mask 1232 */ 1233 protected function mask($width, $frame, $level) { 1234 $minDemerit = PHP_INT_MAX; 1235 $bestMaskNum = 0; 1236 $bestMask = array(); 1237 $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7); 1238 if (QR_FIND_FROM_RANDOM !== false) { 1239 $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9); 1240 for ($i = 0; $i < $howManuOut; ++$i) { 1241 $remPos = rand (0, count($checked_masks)-1); 1242 unset($checked_masks[$remPos]); 1243 $checked_masks = array_values($checked_masks); 1244 } 1245 } 1246 $bestMask = $frame; 1247 foreach ($checked_masks as $i) { 1248 $mask = array_fill(0, $width, str_repeat("\0", $width)); 1249 $demerit = 0; 1250 $blacks = 0; 1251 $blacks = $this->makeMaskNo($i, $width, $frame, $mask); 1252 $blacks += $this->writeFormatInformation($width, $mask, $i, $level); 1253 $blacks = (int)(100 * $blacks / ($width * $width)); 1254 $demerit = (int)((int)(abs($blacks - 50) / 5) * N4); 1255 $demerit += $this->evaluateSymbol($width, $mask); 1256 if ($demerit < $minDemerit) { 1257 $minDemerit = $demerit; 1258 $bestMask = $mask; 1259 $bestMaskNum = $i; 1260 } 1261 } 1262 return $bestMask; 1263 } 1264 1265 // - - - - - - - - - - - - - - - - - - - - - - - - - 1266 1267 // QRsplit 1268 1269 /** 1270 * Return true if the character at specified position is a number 1271 * @param string $str string 1272 * @param int $pos characted position 1273 * @return boolean true of false 1274 */ 1275 protected function isdigitat($str, $pos) { 1276 if ($pos >= strlen($str)) { 1277 return false; 1278 } 1279 return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9'))); 1280 } 1281 1282 /** 1283 * Return true if the character at specified position is an alphanumeric character 1284 * @param string $str string 1285 * @param int $pos characted position 1286 * @return boolean true of false 1287 */ 1288 protected function isalnumat($str, $pos) { 1289 if ($pos >= strlen($str)) { 1290 return false; 1291 } 1292 return ($this->lookAnTable(ord($str[$pos])) >= 0); 1293 } 1294 1295 /** 1296 * identifyMode 1297 * @param int $pos 1298 * @return int mode 1299 */ 1300 protected function identifyMode($pos) { 1301 if ($pos >= strlen($this->dataStr)) { 1302 return QR_MODE_NL; 1303 } 1304 $c = $this->dataStr[$pos]; 1305 if ($this->isdigitat($this->dataStr, $pos)) { 1306 return QR_MODE_NM; 1307 } elseif ($this->isalnumat($this->dataStr, $pos)) { 1308 return QR_MODE_AN; 1309 } elseif ($this->hint == QR_MODE_KJ) { 1310 if ($pos+1 < strlen($this->dataStr)) { 1311 $d = $this->dataStr[$pos+1]; 1312 $word = (ord($c) << 8) | ord($d); 1313 if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) { 1314 return QR_MODE_KJ; 1315 } 1316 } 1317 } 1318 return QR_MODE_8B; 1319 } 1320 1321 /** 1322 * eatNum 1323 * @return int run 1324 */ 1325 protected function eatNum() { 1326 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); 1327 $p = 0; 1328 while($this->isdigitat($this->dataStr, $p)) { 1329 $p++; 1330 } 1331 $run = $p; 1332 $mode = $this->identifyMode($p); 1333 if ($mode == QR_MODE_8B) { 1334 $dif = $this->estimateBitsModeNum($run) + 4 + $ln 1335 + $this->estimateBitsMode8(1) // + 4 + l8 1336 - $this->estimateBitsMode8($run + 1); // - 4 - l8 1337 if ($dif > 0) { 1338 return $this->eat8(); 1339 } 1340 } 1341 if ($mode == QR_MODE_AN) { 1342 $dif = $this->estimateBitsModeNum($run) + 4 + $ln 1343 + $this->estimateBitsModeAn(1) // + 4 + la 1344 - $this->estimateBitsModeAn($run + 1);// - 4 - la 1345 if ($dif > 0) { 1346 return $this->eatAn(); 1347 } 1348 } 1349 $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr)); 1350 return $run; 1351 } 1352 1353 /** 1354 * eatAn 1355 * @return int run 1356 */ 1357 protected function eatAn() { 1358 $la = $this->lengthIndicator(QR_MODE_AN, $this->version); 1359 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); 1360 $p = 0; 1361 while($this->isalnumat($this->dataStr, $p)) { 1362 if ($this->isdigitat($this->dataStr, $p)) { 1363 $q = $p; 1364 while($this->isdigitat($this->dataStr, $q)) { 1365 $q++; 1366 } 1367 $dif = $this->estimateBitsModeAn($p) // + 4 + la 1368 + $this->estimateBitsModeNum($q - $p) + 4 + $ln 1369 - $this->estimateBitsModeAn($q); // - 4 - la 1370 if ($dif < 0) { 1371 break; 1372 } else { 1373 $p = $q; 1374 } 1375 } else { 1376 $p++; 1377 } 1378 } 1379 $run = $p; 1380 if (!$this->isalnumat($this->dataStr, $p)) { 1381 $dif = $this->estimateBitsModeAn($run) + 4 + $la 1382 + $this->estimateBitsMode8(1) // + 4 + l8 1383 - $this->estimateBitsMode8($run + 1); // - 4 - l8 1384 if ($dif > 0) { 1385 return $this->eat8(); 1386 } 1387 } 1388 $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr)); 1389 return $run; 1390 } 1391 1392 /** 1393 * eatKanji 1394 * @return int run 1395 */ 1396 protected function eatKanji() { 1397 $p = 0; 1398 while($this->identifyMode($p) == QR_MODE_KJ) { 1399 $p += 2; 1400 } 1401 $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr)); 1402 return $run; 1403 } 1404 1405 /** 1406 * eat8 1407 * @return int run 1408 */ 1409 protected function eat8() { 1410 $la = $this->lengthIndicator(QR_MODE_AN, $this->version); 1411 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); 1412 $p = 1; 1413 $dataStrLen = strlen($this->dataStr); 1414 while($p < $dataStrLen) { 1415 $mode = $this->identifyMode($p); 1416 if ($mode == QR_MODE_KJ) { 1417 break; 1418 } 1419 if ($mode == QR_MODE_NM) { 1420 $q = $p; 1421 while($this->isdigitat($this->dataStr, $q)) { 1422 $q++; 1423 } 1424 $dif = $this->estimateBitsMode8($p) // + 4 + l8 1425 + $this->estimateBitsModeNum($q - $p) + 4 + $ln 1426 - $this->estimateBitsMode8($q); // - 4 - l8 1427 if ($dif < 0) { 1428 break; 1429 } else { 1430 $p = $q; 1431 } 1432 } elseif ($mode == QR_MODE_AN) { 1433 $q = $p; 1434 while($this->isalnumat($this->dataStr, $q)) { 1435 $q++; 1436 } 1437 $dif = $this->estimateBitsMode8($p) // + 4 + l8 1438 + $this->estimateBitsModeAn($q - $p) + 4 + $la 1439 - $this->estimateBitsMode8($q); // - 4 - l8 1440 if ($dif < 0) { 1441 break; 1442 } else { 1443 $p = $q; 1444 } 1445 } else { 1446 $p++; 1447 } 1448 } 1449 $run = $p; 1450 $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr)); 1451 return $run; 1452 } 1453 1454 /** 1455 * splitString 1456 */ 1457 protected function splitString() { 1458 while (strlen($this->dataStr) > 0) { 1459 if ($this->dataStr == '') { 1460 return 0; 1461 } 1462 $mode = $this->identifyMode(0); 1463 switch ($mode) { 1464 case QR_MODE_NM: { 1465 $length = $this->eatNum(); 1466 break; 1467 } 1468 case QR_MODE_AN: { 1469 $length = $this->eatAn(); 1470 break; 1471 } 1472 case QR_MODE_KJ: { 1473 if ($hint == QR_MODE_KJ) { 1474 $length = $this->eatKanji(); 1475 } else { 1476 $length = $this->eat8(); 1477 } 1478 break; 1479 } 1480 default: { 1481 $length = $this->eat8(); 1482 break; 1483 } 1484 } 1485 if ($length == 0) { 1486 return 0; 1487 } 1488 if ($length < 0) { 1489 return -1; 1490 } 1491 $this->dataStr = substr($this->dataStr, $length); 1492 } 1493 } 1494 1495 /** 1496 * toUpper 1497 */ 1498 protected function toUpper() { 1499 $stringLen = strlen($this->dataStr); 1500 $p = 0; 1501 while ($p < $stringLen) { 1502 $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint); 1503 if ($mode == QR_MODE_KJ) { 1504 $p += 2; 1505 } else { 1506 if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) { 1507 $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32); 1508 } 1509 $p++; 1510 } 1511 } 1512 return $this->dataStr; 1513 } 1514 1515 // - - - - - - - - - - - - - - - - - - - - - - - - - 1516 1517 // QRinputItem 1518 1519 /** 1520 * newInputItem 1521 * @param int $mode 1522 * @param int $size 1523 * @param array $data 1524 * @param array $bstream 1525 * @return array input item 1526 */ 1527 protected function newInputItem($mode, $size, $data, $bstream=null) { 1528 $setData = array_slice($data, 0, $size); 1529 if (count($setData) < $size) { 1530 $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0)); 1531 } 1532 if (!$this->check($mode, $size, $setData)) { 1533 return NULL; 1534 } 1535 $inputitem = array(); 1536 $inputitem['mode'] = $mode; 1537 $inputitem['size'] = $size; 1538 $inputitem['data'] = $setData; 1539 $inputitem['bstream'] = $bstream; 1540 return $inputitem; 1541 } 1542 1543 /** 1544 * encodeModeNum 1545 * @param array $inputitem 1546 * @param int $version 1547 * @return array input item 1548 */ 1549 protected function encodeModeNum($inputitem, $version) { 1550 $words = (int)($inputitem['size'] / 3); 1551 $inputitem['bstream'] = array(); 1552 $val = 0x1; 1553 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val); 1554 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']); 1555 for ($i=0; $i < $words; ++$i) { 1556 $val = (ord($inputitem['data'][$i*3 ]) - ord('0')) * 100; 1557 $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10; 1558 $val += (ord($inputitem['data'][$i*3+2]) - ord('0')); 1559 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val); 1560 } 1561 if ($inputitem['size'] - $words * 3 == 1) { 1562 $val = ord($inputitem['data'][$words*3]) - ord('0'); 1563 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val); 1564 } elseif (($inputitem['size'] - ($words * 3)) == 2) { 1565 $val = (ord($inputitem['data'][$words*3 ]) - ord('0')) * 10; 1566 $val += (ord($inputitem['data'][$words*3+1]) - ord('0')); 1567 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val); 1568 } 1569 return $inputitem; 1570 } 1571 1572 /** 1573 * encodeModeAn 1574 * @param array $inputitem 1575 * @param int $version 1576 * @return array input item 1577 */ 1578 protected function encodeModeAn($inputitem, $version) { 1579 $words = (int)($inputitem['size'] / 2); 1580 $inputitem['bstream'] = array(); 1581 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02); 1582 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']); //DEBUG 1583 for ($i=0; $i < $words; ++$i) { 1584 $val = (int)$this->lookAnTable(ord($inputitem['data'][$i*2 ])) * 45; 1585 $val += (int)$this->lookAnTable(ord($inputitem['data'][$i*2+1])); 1586 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val); 1587 } 1588 if ($inputitem['size'] & 1) { 1589 $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)])); 1590 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val); 1591 } 1592 return $inputitem; 1593 } 1594 1595 /** 1596 * encodeMode8 1597 * @param array $inputitem 1598 * @param int $version 1599 * @return array input item 1600 */ 1601 protected function encodeMode8($inputitem, $version) { 1602 $inputitem['bstream'] = array(); 1603 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4); 1604 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']); 1605 for ($i=0; $i < $inputitem['size']; ++$i) { 1606 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i])); 1607 } 1608 return $inputitem; 1609 } 1610 1611 /** 1612 * encodeModeKanji 1613 * @param array $inputitem 1614 * @param int $version 1615 * @return array input item 1616 */ 1617 protected function encodeModeKanji($inputitem, $version) { 1618 $inputitem['bstream'] = array(); 1619 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8); 1620 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2)); 1621 for ($i=0; $i<$inputitem['size']; $i+=2) { 1622 $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]); 1623 if ($val <= 0x9ffc) { 1624 $val -= 0x8140; 1625 } else { 1626 $val -= 0xc140; 1627 } 1628 $h = ($val >> 8) * 0xc0; 1629 $val = ($val & 0xff) + $h; 1630 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val); 1631 } 1632 return $inputitem; 1633 } 1634 1635 /** 1636 * encodeModeStructure 1637 * @param array $inputitem 1638 * @return array input item 1639 */ 1640 protected function encodeModeStructure($inputitem) { 1641 $inputitem['bstream'] = array(); 1642 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03); 1643 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1); 1644 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1); 1645 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2])); 1646 return $inputitem; 1647 } 1648 1649 /** 1650 * encodeBitStream 1651 * @param array $inputitem 1652 * @param int $version 1653 * @return array input item 1654 */ 1655 protected function encodeBitStream($inputitem, $version) { 1656 $inputitem['bstream'] = array(); 1657 $words = $this->maximumWords($inputitem['mode'], $version); 1658 if ($inputitem['size'] > $words) { 1659 $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']); 1660 $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words)); 1661 $st1 = $this->encodeBitStream($st1, $version); 1662 $st2 = $this->encodeBitStream($st2, $version); 1663 $inputitem['bstream'] = array(); 1664 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']); 1665 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']); 1666 } else { 1667 switch($inputitem['mode']) { 1668 case QR_MODE_NM: { 1669 $inputitem = $this->encodeModeNum($inputitem, $version); 1670 break; 1671 } 1672 case QR_MODE_AN: { 1673 $inputitem = $this->encodeModeAn($inputitem, $version); 1674 break; 1675 } 1676 case QR_MODE_8B: { 1677 $inputitem = $this->encodeMode8($inputitem, $version); 1678 break; 1679 } 1680 case QR_MODE_KJ: { 1681 $inputitem = $this->encodeModeKanji($inputitem, $version); 1682 break; 1683 } 1684 case QR_MODE_ST: { 1685 $inputitem = $this->encodeModeStructure($inputitem); 1686 break; 1687 } 1688 default: { 1689 break; 1690 } 1691 } 1692 } 1693 return $inputitem; 1694 } 1695 1696 // - - - - - - - - - - - - - - - - - - - - - - - - - 1697 1698 // QRinput 1699 1700 /** 1701 * Append data to an input object. 1702 * The data is copied and appended to the input object. 1703 * @param array items input items 1704 * @param int $mode encoding mode. 1705 * @param int $size size of data (byte). 1706 * @param array $data array of input data. 1707 * @return items 1708 * 1709 */ 1710 protected function appendNewInputItem($items, $mode, $size, $data) { 1711 $items[] = $this->newInputItem($mode, $size, $data); 1712 return $items; 1713 } 1714 1715 /** 1716 * insertStructuredAppendHeader 1717 * @param array $items 1718 * @param int $size 1719 * @param int $index 1720 * @param int $parity 1721 * @return array items 1722 */ 1723 protected function insertStructuredAppendHeader($items, $size, $index, $parity) { 1724 if ($size > MAX_STRUCTURED_SYMBOLS) { 1725 return -1; 1726 } 1727 if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) { 1728 return -1; 1729 } 1730 $buf = array($size, $index, $parity); 1731 $entry = $this->newInputItem(QR_MODE_ST, 3, buf); 1732 array_unshift($items, $entry); 1733 return $items; 1734 } 1735 1736 /** 1737 * calcParity 1738 * @param array $items 1739 * @return int parity 1740 */ 1741 protected function calcParity($items) { 1742 $parity = 0; 1743 foreach ($items as $item) { 1744 if ($item['mode'] != QR_MODE_ST) { 1745 for ($i=$item['size']-1; $i>=0; --$i) { 1746 $parity ^= $item['data'][$i]; 1747 } 1748 } 1749 } 1750 return $parity; 1751 } 1752 1753 /** 1754 * checkModeNum 1755 * @param int $size 1756 * @param array $data 1757 * @return boolean true or false 1758 */ 1759 protected function checkModeNum($size, $data) { 1760 for ($i=0; $i<$size; ++$i) { 1761 if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){ 1762 return false; 1763 } 1764 } 1765 return true; 1766 } 1767 1768 /** 1769 * estimateBitsModeNum 1770 * @param int $size 1771 * @return int number of bits 1772 */ 1773 protected function estimateBitsModeNum($size) { 1774 $w = (int)$size / 3; 1775 $bits = $w * 10; 1776 switch($size - $w * 3) { 1777 case 1: { 1778 $bits += 4; 1779 break; 1780 } 1781 case 2: { 1782 $bits += 7; 1783 break; 1784 } 1785 default: { 1786 break; 1787 } 1788 } 1789 return $bits; 1790 } 1791 1792 /** 1793 * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19). 1794 * @param int $c character value 1795 * @return value 1796 */ 1797 protected function lookAnTable($c) { 1798 return (($c > 127)?-1:$this->anTable[$c]); 1799 } 1800 1801 /** 1802 * checkModeAn 1803 * @param int $size 1804 * @param array $data 1805 * @return boolean true or false 1806 */ 1807 protected function checkModeAn($size, $data) { 1808 for ($i=0; $i<$size; ++$i) { 1809 if ($this->lookAnTable(ord($data[$i])) == -1) { 1810 return false; 1811 } 1812 } 1813 return true; 1814 } 1815 1816 /** 1817 * estimateBitsModeAn 1818 * @param int $size 1819 * @return int number of bits 1820 */ 1821 protected function estimateBitsModeAn($size) { 1822 $w = (int)($size / 2); 1823 $bits = $w * 11; 1824 if ($size & 1) { 1825 $bits += 6; 1826 } 1827 return $bits; 1828 } 1829 1830 /** 1831 * estimateBitsMode8 1832 * @param int $size 1833 * @return int number of bits 1834 */ 1835 protected function estimateBitsMode8($size) { 1836 return $size * 8; 1837 } 1838 1839 /** 1840 * estimateBitsModeKanji 1841 * @param int $size 1842 * @return int number of bits 1843 */ 1844 protected function estimateBitsModeKanji($size) { 1845 return (int)(($size / 2) * 13); 1846 } 1847 1848 /** 1849 * checkModeKanji 1850 * @param int $size 1851 * @param array $data 1852 * @return boolean true or false 1853 */ 1854 protected function checkModeKanji($size, $data) { 1855 if ($size & 1) { 1856 return false; 1857 } 1858 for ($i=0; $i<$size; $i+=2) { 1859 $val = (ord($data[$i]) << 8) | ord($data[$i+1]); 1860 if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) { 1861 return false; 1862 } 1863 } 1864 return true; 1865 } 1866 1867 /** 1868 * Validate the input data. 1869 * @param int $mode encoding mode. 1870 * @param int $size size of data (byte). 1871 * @param array data data to validate 1872 * @return boolean true in case of valid data, false otherwise 1873 */ 1874 protected function check($mode, $size, $data) { 1875 if ($size <= 0) { 1876 return false; 1877 } 1878 switch($mode) { 1879 case QR_MODE_NM: { 1880 return $this->checkModeNum($size, $data); 1881 } 1882 case QR_MODE_AN: { 1883 return $this->checkModeAn($size, $data); 1884 } 1885 case QR_MODE_KJ: { 1886 return $this->checkModeKanji($size, $data); 1887 } 1888 case QR_MODE_8B: { 1889 return true; 1890 } 1891 case QR_MODE_ST: { 1892 return true; 1893 } 1894 default: { 1895 break; 1896 } 1897 } 1898 return false; 1899 } 1900 1901 /** 1902 * estimateBitStreamSize 1903 * @param array $items 1904 * @param int $version 1905 * @return int bits 1906 */ 1907 protected function estimateBitStreamSize($items, $version) { 1908 $bits = 0; 1909 if ($version == 0) { 1910 $version = 1; 1911 } 1912 foreach ($items as $item) { 1913 switch($item['mode']) { 1914 case QR_MODE_NM: { 1915 $bits = $this->estimateBitsModeNum($item['size']); 1916 break; 1917 } 1918 case QR_MODE_AN: { 1919 $bits = $this->estimateBitsModeAn($item['size']); 1920 break; 1921 } 1922 case QR_MODE_8B: { 1923 $bits = $this->estimateBitsMode8($item['size']); 1924 break; 1925 } 1926 case QR_MODE_KJ: { 1927 $bits = $this->estimateBitsModeKanji($item['size']); 1928 break; 1929 } 1930 case QR_MODE_ST: { 1931 return STRUCTURE_HEADER_BITS; 1932 } 1933 default: { 1934 return 0; 1935 } 1936 } 1937 $l = $this->lengthIndicator($item['mode'], $version); 1938 $m = 1 << $l; 1939 $num = (int)(($item['size'] + $m - 1) / $m); 1940 $bits += $num * (4 + $l); 1941 } 1942 return $bits; 1943 } 1944 1945 /** 1946 * estimateVersion 1947 * @param array $items 1948 * @return int version 1949 */ 1950 protected function estimateVersion($items) { 1951 $version = 0; 1952 $prev = 0; 1953 do { 1954 $prev = $version; 1955 $bits = $this->estimateBitStreamSize($items, $prev); 1956 $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level); 1957 if ($version < 0) { 1958 return -1; 1959 } 1960 } while ($version > $prev); 1961 return $version; 1962 } 1963 1964 /** 1965 * lengthOfCode 1966 * @param int $mode 1967 * @param int $version 1968 * @param int $bits 1969 * @return int size 1970 */ 1971 protected function lengthOfCode($mode, $version, $bits) { 1972 $payload = $bits - 4 - $this->lengthIndicator($mode, $version); 1973 switch($mode) { 1974 case QR_MODE_NM: { 1975 $chunks = (int)($payload / 10); 1976 $remain = $payload - $chunks * 10; 1977 $size = $chunks * 3; 1978 if ($remain >= 7) { 1979 $size += 2; 1980 } elseif ($remain >= 4) { 1981 $size += 1; 1982 } 1983 break; 1984 } 1985 case QR_MODE_AN: { 1986 $chunks = (int)($payload / 11); 1987 $remain = $payload - $chunks * 11; 1988 $size = $chunks * 2; 1989 if ($remain >= 6) { 1990 ++$size; 1991 } 1992 break; 1993 } 1994 case QR_MODE_8B: { 1995 $size = (int)($payload / 8); 1996 break; 1997 } 1998 case QR_MODE_KJ: { 1999 $size = (int)(($payload / 13) * 2); 2000 break; 2001 } 2002 case QR_MODE_ST: { 2003 $size = (int)($payload / 8); 2004 break; 2005 } 2006 default: { 2007 $size = 0; 2008 break; 2009 } 2010 } 2011 $maxsize = $this->maximumWords($mode, $version); 2012 if ($size < 0) { 2013 $size = 0; 2014 } 2015 if ($size > $maxsize) { 2016 $size = $maxsize; 2017 } 2018 return $size; 2019 } 2020 2021 /** 2022 * createBitStream 2023 * @param array $items 2024 * @return array of items and total bits 2025 */ 2026 protected function createBitStream($items) { 2027 $total = 0; 2028 foreach ($items as $key => $item) { 2029 $items[$key] = $this->encodeBitStream($item, $this->version); 2030 $bits = count($items[$key]['bstream']); 2031 $total += $bits; 2032 } 2033 return array($items, $total); 2034 } 2035 2036 /** 2037 * convertData 2038 * @param array $items 2039 * @return array items 2040 */ 2041 protected function convertData($items) { 2042 $ver = $this->estimateVersion($items); 2043 if ($ver > $this->version) { 2044 $this->version = $ver; 2045 } 2046 for (;;) { 2047 $cbs = $this->createBitStream($items); 2048 $items = $cbs[0]; 2049 $bits = $cbs[1]; 2050 if ($bits < 0) { 2051 return -1; 2052 } 2053 $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level); 2054 if ($ver < 0) { 2055 return -1; 2056 } elseif ($ver > $this->version) { 2057 $this->version = $ver; 2058 } else { 2059 break; 2060 } 2061 } 2062 return $items; 2063 } 2064 2065 /** 2066 * Append Padding Bit to bitstream 2067 * @param array $bstream 2068 * @return array bitstream 2069 */ 2070 protected function appendPaddingBit($bstream) { 2071 $bits = count($bstream); 2072 $maxwords = $this->getDataLength($this->version, $this->level); 2073 $maxbits = $maxwords * 8; 2074 if ($maxbits == $bits) { 2075 return 0; 2076 } 2077 if ($maxbits - $bits < 5) { 2078 return $this->appendNum($bstream, $maxbits - $bits, 0); 2079 } 2080 $bits += 4; 2081 $words = (int)(($bits + 7) / 8); 2082 $padding = array(); 2083 $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0); 2084 $padlen = $maxwords - $words; 2085 if ($padlen > 0) { 2086 $padbuf = array(); 2087 for ($i=0; $i<$padlen; ++$i) { 2088 $padbuf[$i] = ($i&1)?0x11:0xec; 2089 } 2090 $padding = $this->appendBytes($padding, $padlen, $padbuf); 2091 } 2092 return $this->appendBitstream($bstream, $padding); 2093 } 2094 2095 /** 2096 * mergeBitStream 2097 * @param array $bstream 2098 * @return array bitstream 2099 */ 2100 protected function mergeBitStream($items) { 2101 $items = $this->convertData($items); 2102 $bstream = array(); 2103 foreach ($items as $item) { 2104 $bstream = $this->appendBitstream($bstream, $item['bstream']); 2105 } 2106 return $bstream; 2107 } 2108 2109 /** 2110 * Returns a stream of bits. 2111 * @param int $items 2112 * @return array padded merged byte stream 2113 */ 2114 protected function getBitStream($items) { 2115 $bstream = $this->mergeBitStream($items); 2116 return $this->appendPaddingBit($bstream); 2117 } 2118 2119 /** 2120 * Pack all bit streams padding bits into a byte array. 2121 * @param int $items 2122 * @return array padded merged byte stream 2123 */ 2124 protected function getByteStream($items) { 2125 $bstream = $this->getBitStream($items); 2126 return $this->bitstreamToByte($bstream); 2127 } 2128 2129 // - - - - - - - - - - - - - - - - - - - - - - - - - 2130 2131 // QRbitstream 2132 2133 /** 2134 * Return an array with zeros 2135 * @param int $setLength array size 2136 * @return array 2137 */ 2138 protected function allocate($setLength) { 2139 return array_fill(0, $setLength, 0); 2140 } 2141 2142 /** 2143 * Return new bitstream from number 2144 * @param int $bits number of bits 2145 * @param int $num number 2146 * @return array bitstream 2147 */ 2148 protected function newFromNum($bits, $num) { 2149 $bstream = $this->allocate($bits); 2150 $mask = 1 << ($bits - 1); 2151 for ($i=0; $i<$bits; ++$i) { 2152 if ($num & $mask) { 2153 $bstream[$i] = 1; 2154 } else { 2155 $bstream[$i] = 0; 2156 } 2157 $mask = $mask >> 1; 2158 } 2159 return $bstream; 2160 } 2161 2162 /** 2163 * Return new bitstream from bytes 2164 * @param int $size size 2165 * @param array $data bytes 2166 * @return array bitstream 2167 */ 2168 protected function newFromBytes($size, $data) { 2169 $bstream = $this->allocate($size * 8); 2170 $p=0; 2171 for ($i=0; $i<$size; ++$i) { 2172 $mask = 0x80; 2173 for ($j=0; $j<8; ++$j) { 2174 if ($data[$i] & $mask) { 2175 $bstream[$p] = 1; 2176 } else { 2177 $bstream[$p] = 0; 2178 } 2179 $p++; 2180 $mask = $mask >> 1; 2181 } 2182 } 2183 return $bstream; 2184 } 2185 2186 /** 2187 * Append one bitstream to another 2188 * @param array $bitstream original bitstream 2189 * @param array $append bitstream to append 2190 * @return array bitstream 2191 */ 2192 protected function appendBitstream($bitstream, $append) { 2193 if ((!is_array($append)) OR (count($append) == 0)) { 2194 return $bitstream; 2195 } 2196 if (count($bitstream) == 0) { 2197 return $append; 2198 } 2199 return array_values(array_merge($bitstream, $append)); 2200 } 2201 2202 /** 2203 * Append one bitstream created from number to another 2204 * @param array $bitstream original bitstream 2205 * @param int $bits number of bits 2206 * @param int $num number 2207 * @return array bitstream 2208 */ 2209 protected function appendNum($bitstream, $bits, $num) { 2210 if ($bits == 0) { 2211 return 0; 2212 } 2213 $b = $this->newFromNum($bits, $num); 2214 return $this->appendBitstream($bitstream, $b); 2215 } 2216 2217 /** 2218 * Append one bitstream created from bytes to another 2219 * @param array $bitstream original bitstream 2220 * @param int $size size 2221 * @param array $data bytes 2222 * @return array bitstream 2223 */ 2224 protected function appendBytes($bitstream, $size, $data) { 2225 if ($size == 0) { 2226 return 0; 2227 } 2228 $b = $this->newFromBytes($size, $data); 2229 return $this->appendBitstream($bitstream, $b); 2230 } 2231 2232 /** 2233 * Convert bitstream to bytes 2234 * @param array $bitstream original bitstream 2235 * @return array of bytes 2236 */ 2237 protected function bitstreamToByte($bstream) { 2238 $size = count($bstream); 2239 if ($size == 0) { 2240 return array(); 2241 } 2242 $data = array_fill(0, (int)(($size + 7) / 8), 0); 2243 $bytes = (int)($size / 8); 2244 $p = 0; 2245 for ($i=0; $i<$bytes; $i++) { 2246 $v = 0; 2247 for ($j=0; $j<8; $j++) { 2248 $v = $v << 1; 2249 $v |= $bstream[$p]; 2250 $p++; 2251 } 2252 $data[$i] = $v; 2253 } 2254 if ($size & 7) { 2255 $v = 0; 2256 for ($j=0; $j<($size & 7); $j++) { 2257 $v = $v << 1; 2258 $v |= $bstream[$p]; 2259 $p++; 2260 } 2261 $data[$bytes] = $v; 2262 } 2263 return $data; 2264 } 2265 2266 // - - - - - - - - - - - - - - - - - - - - - - - - - 2267 2268 // QRspec 2269 2270 /** 2271 * Replace a value on the array at the specified position 2272 * @param array $srctab 2273 * @param int $x X position 2274 * @param int $y Y position 2275 * @param string $repl value to replace 2276 * @param int $replLen length of the repl string 2277 * @return array srctab 2278 */ 2279 protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) { 2280 $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl)); 2281 return $srctab; 2282 } 2283 2284 /** 2285 * Return maximum data code length (bytes) for the version. 2286 * @param int $version version 2287 * @param int $level error correction level 2288 * @return int maximum size (bytes) 2289 */ 2290 protected function getDataLength($version, $level) { 2291 return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level]; 2292 } 2293 2294 /** 2295 * Return maximum error correction code length (bytes) for the version. 2296 * @param int $version version 2297 * @param int $level error correction level 2298 * @return int ECC size (bytes) 2299 */ 2300 protected function getECCLength($version, $level){ 2301 return $this->capacity[$version][QRCAP_EC][$level]; 2302 } 2303 2304 /** 2305 * Return the width of the symbol for the version. 2306 * @param int $version version 2307 * @return int width 2308 */ 2309 protected function getWidth($version) { 2310 return $this->capacity[$version][QRCAP_WIDTH]; 2311 } 2312 2313 /** 2314 * Return the numer of remainder bits. 2315 * @param int $version version 2316 * @return int number of remainder bits 2317 */ 2318 protected function getRemainder($version) { 2319 return $this->capacity[$version][QRCAP_REMINDER]; 2320 } 2321 2322 /** 2323 * Return a version number that satisfies the input code length. 2324 * @param int $size input code length (byte) 2325 * @param int $level error correction level 2326 * @return int version number 2327 */ 2328 protected function getMinimumVersion($size, $level) { 2329 for ($i=1; $i <= QRSPEC_VERSION_MAX; ++$i) { 2330 $words = $this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]; 2331 if ($words >= $size) { 2332 return $i; 2333 } 2334 } 2335 return -1; 2336 } 2337 2338 /** 2339 * Return the size of length indicator for the mode and version. 2340 * @param int $mode encoding mode 2341 * @param int $version version 2342 * @return int the size of the appropriate length indicator (bits). 2343 */ 2344 protected function lengthIndicator($mode, $version) { 2345 if ($mode == QR_MODE_ST) { 2346 return 0; 2347 } 2348 if ($version <= 9) { 2349 $l = 0; 2350 } elseif ($version <= 26) { 2351 $l = 1; 2352 } else { 2353 $l = 2; 2354 } 2355 return $this->lengthTableBits[$mode][$l]; 2356 } 2357 2358 /** 2359 * Return the maximum length for the mode and version. 2360 * @param int $mode encoding mode 2361 * @param int $version version 2362 * @return int the maximum length (bytes) 2363 */ 2364 protected function maximumWords($mode, $version) { 2365 if ($mode == QR_MODE_ST) { 2366 return 3; 2367 } 2368 if ($version <= 9) { 2369 $l = 0; 2370 } else if ($version <= 26) { 2371 $l = 1; 2372 } else { 2373 $l = 2; 2374 } 2375 $bits = $this->lengthTableBits[$mode][$l]; 2376 $words = (1 << $bits) - 1; 2377 if ($mode == QR_MODE_KJ) { 2378 $words *= 2; // the number of bytes is required 2379 } 2380 return $words; 2381 } 2382 2383 /** 2384 * Return an array of ECC specification. 2385 * @param int $version version 2386 * @param int $level error correction level 2387 * @param array $spec an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code} 2388 * @return array spec 2389 */ 2390 protected function getEccSpec($version, $level, $spec) { 2391 if (count($spec) < 5) { 2392 $spec = array(0, 0, 0, 0, 0); 2393 } 2394 $b1 = $this->eccTable[$version][$level][0]; 2395 $b2 = $this->eccTable[$version][$level][1]; 2396 $data = $this->getDataLength($version, $level); 2397 $ecc = $this->getECCLength($version, $level); 2398 if ($b2 == 0) { 2399 $spec[0] = $b1; 2400 $spec[1] = (int)($data / $b1); 2401 $spec[2] = (int)($ecc / $b1); 2402 $spec[3] = 0; 2403 $spec[4] = 0; 2404 } else { 2405 $spec[0] = $b1; 2406 $spec[1] = (int)($data / ($b1 + $b2)); 2407 $spec[2] = (int)($ecc / ($b1 + $b2)); 2408 $spec[3] = $b2; 2409 $spec[4] = $spec[1] + 1; 2410 } 2411 return $spec; 2412 } 2413 2414 /** 2415 * Put an alignment marker. 2416 * @param array $frame frame 2417 * @param int $width width 2418 * @param int $ox X center coordinate of the pattern 2419 * @param int $oy Y center coordinate of the pattern 2420 * @return array frame 2421 */ 2422 protected function putAlignmentMarker($frame, $ox, $oy) { 2423 $finder = array( 2424 "\xa1\xa1\xa1\xa1\xa1", 2425 "\xa1\xa0\xa0\xa0\xa1", 2426 "\xa1\xa0\xa1\xa0\xa1", 2427 "\xa1\xa0\xa0\xa0\xa1", 2428 "\xa1\xa1\xa1\xa1\xa1" 2429 ); 2430 $yStart = $oy - 2; 2431 $xStart = $ox - 2; 2432 for ($y=0; $y < 5; $y++) { 2433 $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]); 2434 } 2435 return $frame; 2436 } 2437 2438 /** 2439 * Put an alignment pattern. 2440 * @param int $version version 2441 * @param array $fram frame 2442 * @param int $width width 2443 * @return array frame 2444 */ 2445 protected function putAlignmentPattern($version, $frame, $width) { 2446 if ($version < 2) { 2447 return $frame; 2448 } 2449 $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0]; 2450 if ($d < 0) { 2451 $w = 2; 2452 } else { 2453 $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2); 2454 } 2455 if ($w * $w - 3 == 1) { 2456 $x = $this->alignmentPattern[$version][0]; 2457 $y = $this->alignmentPattern[$version][0]; 2458 $frame = $this->putAlignmentMarker($frame, $x, $y); 2459 return $frame; 2460 } 2461 $cx = $this->alignmentPattern[$version][0]; 2462 $wo = $w - 1; 2463 for ($x=1; $x < $wo; ++$x) { 2464 $frame = $this->putAlignmentMarker($frame, 6, $cx); 2465 $frame = $this->putAlignmentMarker($frame, $cx, 6); 2466 $cx += $d; 2467 } 2468 $cy = $this->alignmentPattern[$version][0]; 2469 for ($y=0; $y < $wo; ++$y) { 2470 $cx = $this->alignmentPattern[$version][0]; 2471 for ($x=0; $x < $wo; ++$x) { 2472 $frame = $this->putAlignmentMarker($frame, $cx, $cy); 2473 $cx += $d; 2474 } 2475 $cy += $d; 2476 } 2477 return $frame; 2478 } 2479 2480 /** 2481 * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits. 2482 * @param int $version version 2483 * @return BCH encoded version information pattern 2484 */ 2485 protected function getVersionPattern($version) { 2486 if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) { 2487 return 0; 2488 } 2489 return $this->versionPattern[($version - 7)]; 2490 } 2491 2492 /** 2493 * Return BCH encoded format information pattern. 2494 * @param array $mask 2495 * @param int $level error correction level 2496 * @return BCH encoded format information pattern 2497 */ 2498 protected function getFormatInfo($mask, $level) { 2499 if (($mask < 0) OR ($mask > 7)) { 2500 return 0; 2501 } 2502 if (($level < 0) OR ($level > 3)) { 2503 return 0; 2504 } 2505 return $this->formatInfo[$level][$mask]; 2506 } 2507 2508 /** 2509 * Put a finder pattern. 2510 * @param array $frame frame 2511 * @param int $width width 2512 * @param int $ox X center coordinate of the pattern 2513 * @param int $oy Y center coordinate of the pattern 2514 * @return array frame 2515 */ 2516 protected function putFinderPattern($frame, $ox, $oy) { 2517 $finder = array( 2518 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1", 2519 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1", 2520 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", 2521 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", 2522 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", 2523 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1", 2524 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1" 2525 ); 2526 for ($y=0; $y < 7; $y++) { 2527 $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]); 2528 } 2529 return $frame; 2530 } 2531 2532 /** 2533 * Return a copy of initialized frame. 2534 * @param int $version version 2535 * @return Array of unsigned char. 2536 */ 2537 protected function createFrame($version) { 2538 $width = $this->capacity[$version][QRCAP_WIDTH]; 2539 $frameLine = str_repeat ("\0", $width); 2540 $frame = array_fill(0, $width, $frameLine); 2541 // Finder pattern 2542 $frame = $this->putFinderPattern($frame, 0, 0); 2543 $frame = $this->putFinderPattern($frame, $width - 7, 0); 2544 $frame = $this->putFinderPattern($frame, 0, $width - 7); 2545 // Separator 2546 $yOffset = $width - 7; 2547 for ($y=0; $y < 7; ++$y) { 2548 $frame[$y][7] = "\xc0"; 2549 $frame[$y][$width - 8] = "\xc0"; 2550 $frame[$yOffset][7] = "\xc0"; 2551 ++$yOffset; 2552 } 2553 $setPattern = str_repeat("\xc0", 8); 2554 $frame = $this->qrstrset($frame, 0, 7, $setPattern); 2555 $frame = $this->qrstrset($frame, $width-8, 7, $setPattern); 2556 $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern); 2557 // Format info 2558 $setPattern = str_repeat("\x84", 9); 2559 $frame = $this->qrstrset($frame, 0, 8, $setPattern); 2560 $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8); 2561 $yOffset = $width - 8; 2562 for ($y=0; $y < 8; ++$y,++$yOffset) { 2563 $frame[$y][8] = "\x84"; 2564 $frame[$yOffset][8] = "\x84"; 2565 } 2566 // Timing pattern 2567 $wo = $width - 15; 2568 for ($i=1; $i < $wo; ++$i) { 2569 $frame[6][7+$i] = chr(0x90 | ($i & 1)); 2570 $frame[7+$i][6] = chr(0x90 | ($i & 1)); 2571 } 2572 // Alignment pattern 2573 $frame = $this->putAlignmentPattern($version, $frame, $width); 2574 // Version information 2575 if ($version >= 7) { 2576 $vinf = $this->getVersionPattern($version); 2577 $v = $vinf; 2578 for ($x=0; $x<6; ++$x) { 2579 for ($y=0; $y<3; ++$y) { 2580 $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1)); 2581 $v = $v >> 1; 2582 } 2583 } 2584 $v = $vinf; 2585 for ($y=0; $y<6; ++$y) { 2586 for ($x=0; $x<3; ++$x) { 2587 $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1)); 2588 $v = $v >> 1; 2589 } 2590 } 2591 } 2592 // and a little bit... 2593 $frame[$width - 8][8] = "\x81"; 2594 return $frame; 2595 } 2596 2597 /** 2598 * Set new frame for the specified version. 2599 * @param int $version version 2600 * @return Array of unsigned char. 2601 */ 2602 protected function newFrame($version) { 2603 if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) { 2604 return NULL; 2605 } 2606 if (!isset($this->frames[$version])) { 2607 $this->frames[$version] = $this->createFrame($version); 2608 } 2609 if (is_null($this->frames[$version])) { 2610 return NULL; 2611 } 2612 return $this->frames[$version]; 2613 } 2614 2615 /** 2616 * Return block number 0 2617 * @param array $spec 2618 * @return int value 2619 */ 2620 protected function rsBlockNum($spec) { 2621 return ($spec[0] + $spec[3]); 2622 } 2623 2624 /** 2625 * Return block number 1 2626 * @param array $spec 2627 * @return int value 2628 */ 2629 protected function rsBlockNum1($spec) { 2630 return $spec[0]; 2631 } 2632 2633 /** 2634 * Return data codes 1 2635 * @param array $spec 2636 * @return int value 2637 */ 2638 protected function rsDataCodes1($spec) { 2639 return $spec[1]; 2640 } 2641 2642 /** 2643 * Return ecc codes 1 2644 * @param array $spec 2645 * @return int value 2646 */ 2647 protected function rsEccCodes1($spec) { 2648 return $spec[2]; 2649 } 2650 2651 /** 2652 * Return block number 2 2653 * @param array $spec 2654 * @return int value 2655 */ 2656 protected function rsBlockNum2($spec) { 2657 return $spec[3]; 2658 } 2659 2660 /** 2661 * Return data codes 2 2662 * @param array $spec 2663 * @return int value 2664 */ 2665 protected function rsDataCodes2($spec) { 2666 return $spec[4]; 2667 } 2668 2669 /** 2670 * Return ecc codes 2 2671 * @param array $spec 2672 * @return int value 2673 */ 2674 protected function rsEccCodes2($spec) { 2675 return $spec[2]; 2676 } 2677 2678 /** 2679 * Return data length 2680 * @param array $spec 2681 * @return int value 2682 */ 2683 protected function rsDataLength($spec) { 2684 return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); 2685 } 2686 2687 /** 2688 * Return ecc length 2689 * @param array $spec 2690 * @return int value 2691 */ 2692 protected function rsEccLength($spec) { 2693 return ($spec[0] + $spec[3]) * $spec[2]; 2694 } 2695 2696 // - - - - - - - - - - - - - - - - - - - - - - - - - 2697 2698 // QRrs 2699 2700 /** 2701 * Initialize a Reed-Solomon codec and add it to existing rsitems 2702 * @param int $symsize symbol size, bits 2703 * @param int $gfpoly Field generator polynomial coefficients 2704 * @param int $fcr first root of RS code generator polynomial, index form 2705 * @param int $prim primitive element to generate polynomial roots 2706 * @param int $nroots RS code generator polynomial degree (number of roots) 2707 * @param int $pad padding bytes at front of shortened block 2708 * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>. 2709 */ 2710 protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) { 2711 foreach ($this->rsitems as $rs) { 2712 if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize) 2713 OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) { 2714 continue; 2715 } 2716 return $rs; 2717 } 2718 $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad); 2719 array_unshift($this->rsitems, $rs); 2720 return $rs; 2721 } 2722 2723 // - - - - - - - - - - - - - - - - - - - - - - - - - 2724 2725 // QRrsItem 2726 2727 /** 2728 * modnn 2729 * @param array RS values 2730 * @param int $x X position 2731 * @return int X osition 2732 */ 2733 protected function modnn($rs, $x) { 2734 while ($x >= $rs['nn']) { 2735 $x -= $rs['nn']; 2736 $x = ($x >> $rs['mm']) + ($x & $rs['nn']); 2737 } 2738 return $x; 2739 } 2740 2741 /** 2742 * Initialize a Reed-Solomon codec and returns an array of values. 2743 * @param int $symsize symbol size, bits 2744 * @param int $gfpoly Field generator polynomial coefficients 2745 * @param int $fcr first root of RS code generator polynomial, index form 2746 * @param int $prim primitive element to generate polynomial roots 2747 * @param int $nroots RS code generator polynomial degree (number of roots) 2748 * @param int $pad padding bytes at front of shortened block 2749 * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>. 2750 */ 2751 protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) { 2752 // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2) 2753 $rs = null; 2754 // Check parameter ranges 2755 if (($symsize < 0) OR ($symsize > 8)) { 2756 return $rs; 2757 } 2758 if (($fcr < 0) OR ($fcr >= (1<<$symsize))) { 2759 return $rs; 2760 } 2761 if (($prim <= 0) OR ($prim >= (1<<$symsize))) { 2762 return $rs; 2763 } 2764 if (($nroots < 0) OR ($nroots >= (1<<$symsize))) { 2765 return $rs; 2766 } 2767 if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) { 2768 return $rs; 2769 } 2770 $rs = array(); 2771 $rs['mm'] = $symsize; 2772 $rs['nn'] = (1 << $symsize) - 1; 2773 $rs['pad'] = $pad; 2774 $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0); 2775 $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0); 2776 // PHP style macro replacement ;) 2777 $NN =& $rs['nn']; 2778 $A0 =& $NN; 2779 // Generate Galois field lookup tables 2780 $rs['index_of'][0] = $A0; // log(zero) = -inf 2781 $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0 2782 $sr = 1; 2783 for ($i=0; $i<$rs['nn']; ++$i) { 2784 $rs['index_of'][$sr] = $i; 2785 $rs['alpha_to'][$i] = $sr; 2786 $sr <<= 1; 2787 if ($sr & (1 << $symsize)) { 2788 $sr ^= $gfpoly; 2789 } 2790 $sr &= $rs['nn']; 2791 } 2792 if ($sr != 1) { 2793 // field generator polynomial is not primitive! 2794 return NULL; 2795 } 2796 // Form RS code generator polynomial from its roots 2797 $rs['genpoly'] = array_fill(0, ($nroots + 1), 0); 2798 $rs['fcr'] = $fcr; 2799 $rs['prim'] = $prim; 2800 $rs['nroots'] = $nroots; 2801 $rs['gfpoly'] = $gfpoly; 2802 // Find prim-th root of 1, used in decoding 2803 for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) { 2804 ; // intentional empty-body loop! 2805 } 2806 $rs['iprim'] = (int)($iprim / $prim); 2807 $rs['genpoly'][0] = 1; 2808 2809 2810 for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) { 2811 $rs['genpoly'][$i+1] = 1; 2812 // Multiply rs->genpoly[] by @**(root + x) 2813 for ($j = $i; $j > 0; --$j) { 2814 if ($rs['genpoly'][$j] != 0) { 2815 $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)]; 2816 } else { 2817 $rs['genpoly'][$j] = $rs['genpoly'][$j-1]; 2818 } 2819 } 2820 // rs->genpoly[0] can never be zero 2821 $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)]; 2822 } 2823 // convert rs->genpoly[] to index form for quicker encoding 2824 for ($i = 0; $i <= $nroots; ++$i) { 2825 $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]]; 2826 } 2827 return $rs; 2828 } 2829 2830 /** 2831 * Encode a Reed-Solomon codec and returns the parity array 2832 * @param array $rs RS values 2833 * @param array $data data 2834 * @param array $parity parity 2835 * @return parity array 2836 */ 2837 protected function encode_rs_char($rs, $data, $parity) { 2838 $MM =& $rs['mm']; // bits per symbol 2839 $NN =& $rs['nn']; // the total number of symbols in a RS block 2840 $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 2841 $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 2842 $GENPOLY =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form 2843 $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 2844 $FCR =& $rs['fcr']; // first consecutive root, index form 2845 $PRIM =& $rs['prim']; // primitive element, index form 2846 $IPRIM =& $rs['iprim']; // prim-th root of 1, index form 2847 $PAD =& $rs['pad']; // the number of pad symbols in a block 2848 $A0 =& $NN; 2849 $parity = array_fill(0, $NROOTS, 0); 2850 for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) { 2851 $feedback = $INDEX_OF[$data[$i] ^ $parity[0]]; 2852 if ($feedback != $A0) { 2853 // feedback term is non-zero 2854 // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must 2855 // always be for the polynomials constructed by init_rs() 2856 $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback); 2857 for ($j=1; $j < $NROOTS; ++$j) { 2858 $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])]; 2859 } 2860 } 2861 // Shift 2862 array_shift($parity); 2863 if ($feedback != $A0) { 2864 array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]); 2865 } else { 2866 array_push($parity, 0); 2867 } 2868 } 2869 return $parity; 2870 } 2871 2872 } // end QRcode class 2873 2874 } // END OF "class_exists QRcode" 2875 ?>
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