Search moodle.org's
Developer Documentation
Developer Documentation
- Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
- Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/lib/tcpdf/include/barcodes/ -> qrcode.php (source)
Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403]
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 //============================================================+
title
Description
Body
title
Description
Body
title
Description
Body
title
Body
