source: trunk/client/inc/hpdf5/tecnickcom/tcpdf/include/barcodes/qrcode.php@ 418

Last change on this file since 418 was 347, checked in by roby, 4 years ago

Aggiornamento per compatibilità con php7.4
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1<?php
2//============================================================+
3// File name : qrcode.php
4// Version : 1.0.010
5// Begin : 2010-03-22
6// Last Update : 2012-07-25
7// Author : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
8// License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
9// -------------------------------------------------------------------
10// Copyright (C) 2010-2012 Nicola Asuni - Tecnick.com LTD
11//
12// This file is part of TCPDF software library.
13//
14// TCPDF is free software: you can redistribute it and/or modify it
15// under the terms of the GNU Lesser General Public License as
16// published by the Free Software Foundation, either version 3 of the
17// License, or (at your option) any later version.
18//
19// TCPDF is distributed in the hope that it will be useful, but
20// WITHOUT ANY WARRANTY; without even the implied warranty of
21// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
22// See the GNU Lesser General Public License for more details.
23//
24// You should have received a copy of the GNU Lesser General Public License
25// along with TCPDF. If not, see <http://www.gnu.org/licenses/>.
26//
27// See LICENSE.TXT file for more information.
28// -------------------------------------------------------------------
29//
30// DESCRIPTION :
31//
32// Class to create QR-code arrays for TCPDF class.
33// QR Code symbol is a 2D barcode that can be scanned by
34// handy terminals such as a mobile phone with CCD.
35// The capacity of QR Code is up to 7000 digits or 4000
36// characters, and has high robustness.
37// This class supports QR Code model 2, described in
38// JIS (Japanese Industrial Standards) X0510:2004
39// or ISO/IEC 18004.
40// Currently the following features are not supported:
41// ECI and FNC1 mode, Micro QR Code, QR Code model 1,
42// Structured mode.
43//
44// This class is derived from the following projects:
45// ---------------------------------------------------------
46// "PHP QR Code encoder"
47// License: GNU-LGPLv3
48// Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
49// http://phpqrcode.sourceforge.net/
50// https://sourceforge.net/projects/phpqrcode/
51//
52// The "PHP QR Code encoder" is based on
53// "C libqrencode library" (ver. 3.1.1)
54// License: GNU-LGPL 2.1
55// Copyright (C) 2006-2010 by Kentaro Fukuchi
56// http://megaui.net/fukuchi/works/qrencode/index.en.html
57//
58// Reed-Solomon code encoder is written by Phil Karn, KA9Q.
59// Copyright (C) 2002-2006 Phil Karn, KA9Q
60//
61// QR Code is registered trademark of DENSO WAVE INCORPORATED
62// http://www.denso-wave.com/qrcode/index-e.html
63// ---------------------------------------------------------
64//============================================================+
65
66/**
67 * @file
68 * Class to create QR-code arrays for TCPDF class.
69 * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
70 * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
71 * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
72 * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
73 *
74 * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
75 * Please read comments on this class source file for full copyright and license information.
76 *
77 * @package com.tecnick.tcpdf
78 * @author Nicola Asuni
79 * @version 1.0.010
80 */
81
82// definitions
83if (!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
253if (!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 */
291class 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 $run = $p;
1390 return $run;
1391 }
1392
1393 /**
1394 * eat8
1395 * @return int run
1396 */
1397 protected function eat8() {
1398 $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1399 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1400 $p = 1;
1401 $dataStrLen = strlen($this->dataStr);
1402 while($p < $dataStrLen) {
1403 $mode = $this->identifyMode($p);
1404 if ($mode == QR_MODE_KJ) {
1405 break;
1406 }
1407 if ($mode == QR_MODE_NM) {
1408 $q = $p;
1409 while($this->isdigitat($this->dataStr, $q)) {
1410 $q++;
1411 }
1412 $dif = $this->estimateBitsMode8($p) // + 4 + l8
1413 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1414 - $this->estimateBitsMode8($q); // - 4 - l8
1415 if ($dif < 0) {
1416 break;
1417 } else {
1418 $p = $q;
1419 }
1420 } elseif ($mode == QR_MODE_AN) {
1421 $q = $p;
1422 while($this->isalnumat($this->dataStr, $q)) {
1423 $q++;
1424 }
1425 $dif = $this->estimateBitsMode8($p) // + 4 + l8
1426 + $this->estimateBitsModeAn($q - $p) + 4 + $la
1427 - $this->estimateBitsMode8($q); // - 4 - l8
1428 if ($dif < 0) {
1429 break;
1430 } else {
1431 $p = $q;
1432 }
1433 } else {
1434 $p++;
1435 }
1436 }
1437 $run = $p;
1438 $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));
1439 return $run;
1440 }
1441
1442 /**
1443 * splitString
1444 * @return (int)
1445 */
1446 protected function splitString() {
1447 while (strlen($this->dataStr) > 0) {
1448 $mode = $this->identifyMode(0);
1449 switch ($mode) {
1450 case QR_MODE_NM: {
1451 $length = $this->eatNum();
1452 break;
1453 }
1454 case QR_MODE_AN: {
1455 $length = $this->eatAn();
1456 break;
1457 }
1458 case QR_MODE_KJ: {
1459 if ($this->hint == QR_MODE_KJ) {
1460 $length = $this->eatKanji();
1461 } else {
1462 $length = $this->eat8();
1463 }
1464 break;
1465 }
1466 default: {
1467 $length = $this->eat8();
1468 break;
1469 }
1470 }
1471 if ($length == 0) {
1472 return 0;
1473 }
1474 if ($length < 0) {
1475 return -1;
1476 }
1477 $this->dataStr = substr($this->dataStr, $length);
1478 }
1479 return 0;
1480 }
1481
1482 /**
1483 * toUpper
1484 */
1485 protected function toUpper() {
1486 $stringLen = strlen($this->dataStr);
1487 $p = 0;
1488 while ($p < $stringLen) {
1489 $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);
1490 if ($mode == QR_MODE_KJ) {
1491 $p += 2;
1492 } else {
1493 if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
1494 $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
1495 }
1496 $p++;
1497 }
1498 }
1499 return $this->dataStr;
1500 }
1501
1502 // - - - - - - - - - - - - - - - - - - - - - - - - -
1503
1504 // QRinputItem
1505
1506 /**
1507 * newInputItem
1508 * @param $mode (int)
1509 * @param $size (int)
1510 * @param $data (array)
1511 * @param $bstream (array)
1512 * @return array input item
1513 */
1514 protected function newInputItem($mode, $size, $data, $bstream=null) {
1515 $setData = array_slice($data, 0, $size);
1516 if (count($setData) < $size) {
1517 $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
1518 }
1519 if (!$this->check($mode, $size, $setData)) {
1520 return NULL;
1521 }
1522 $inputitem = array();
1523 $inputitem['mode'] = $mode;
1524 $inputitem['size'] = $size;
1525 $inputitem['data'] = $setData;
1526 $inputitem['bstream'] = $bstream;
1527 return $inputitem;
1528 }
1529
1530 /**
1531 * encodeModeNum
1532 * @param $inputitem (array)
1533 * @param $version (int)
1534 * @return array input item
1535 */
1536 protected function encodeModeNum($inputitem, $version) {
1537 $words = (int)($inputitem['size'] / 3);
1538 $inputitem['bstream'] = array();
1539 $val = 0x1;
1540 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1541 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
1542 for ($i=0; $i < $words; ++$i) {
1543 $val = (ord($inputitem['data'][$i*3 ]) - ord('0')) * 100;
1544 $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10;
1545 $val += (ord($inputitem['data'][$i*3+2]) - ord('0'));
1546 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
1547 }
1548 if ($inputitem['size'] - $words * 3 == 1) {
1549 $val = ord($inputitem['data'][$words*3]) - ord('0');
1550 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1551 } elseif (($inputitem['size'] - ($words * 3)) == 2) {
1552 $val = (ord($inputitem['data'][$words*3 ]) - ord('0')) * 10;
1553 $val += (ord($inputitem['data'][$words*3+1]) - ord('0'));
1554 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
1555 }
1556 return $inputitem;
1557 }
1558
1559 /**
1560 * encodeModeAn
1561 * @param $inputitem (array)
1562 * @param $version (int)
1563 * @return array input item
1564 */
1565 protected function encodeModeAn($inputitem, $version) {
1566 $words = (int)($inputitem['size'] / 2);
1567 $inputitem['bstream'] = array();
1568 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
1569 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']);
1570 for ($i=0; $i < $words; ++$i) {
1571 $val = (int)($this->lookAnTable(ord($inputitem['data'][$i*2])) * 45);
1572 $val += (int)($this->lookAnTable(ord($inputitem['data'][($i*2)+1])));
1573 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
1574 }
1575 if ($inputitem['size'] & 1) {
1576 $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
1577 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
1578 }
1579 return $inputitem;
1580 }
1581
1582 /**
1583 * encodeMode8
1584 * @param $inputitem (array)
1585 * @param $version (int)
1586 * @return array input item
1587 */
1588 protected function encodeMode8($inputitem, $version) {
1589 $inputitem['bstream'] = array();
1590 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
1591 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
1592 for ($i=0; $i < $inputitem['size']; ++$i) {
1593 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
1594 }
1595 return $inputitem;
1596 }
1597
1598 /**
1599 * encodeModeKanji
1600 * @param $inputitem (array)
1601 * @param $version (int)
1602 * @return array input item
1603 */
1604 protected function encodeModeKanji($inputitem, $version) {
1605 $inputitem['bstream'] = array();
1606 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
1607 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2));
1608 for ($i=0; $i<$inputitem['size']; $i+=2) {
1609 $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]);
1610 if ($val <= 0x9ffc) {
1611 $val -= 0x8140;
1612 } else {
1613 $val -= 0xc140;
1614 }
1615 $h = ($val >> 8) * 0xc0;
1616 $val = ($val & 0xff) + $h;
1617 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
1618 }
1619 return $inputitem;
1620 }
1621
1622 /**
1623 * encodeModeStructure
1624 * @param $inputitem (array)
1625 * @return array input item
1626 */
1627 protected function encodeModeStructure($inputitem) {
1628 $inputitem['bstream'] = array();
1629 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
1630 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
1631 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
1632 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));
1633 return $inputitem;
1634 }
1635
1636 /**
1637 * encodeBitStream
1638 * @param $inputitem (array)
1639 * @param $version (int)
1640 * @return array input item
1641 */
1642 protected function encodeBitStream($inputitem, $version) {
1643 $inputitem['bstream'] = array();
1644 $words = $this->maximumWords($inputitem['mode'], $version);
1645 if ($inputitem['size'] > $words) {
1646 $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
1647 $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
1648 $st1 = $this->encodeBitStream($st1, $version);
1649 $st2 = $this->encodeBitStream($st2, $version);
1650 $inputitem['bstream'] = array();
1651 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
1652 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
1653 } else {
1654 switch($inputitem['mode']) {
1655 case QR_MODE_NM: {
1656 $inputitem = $this->encodeModeNum($inputitem, $version);
1657 break;
1658 }
1659 case QR_MODE_AN: {
1660 $inputitem = $this->encodeModeAn($inputitem, $version);
1661 break;
1662 }
1663 case QR_MODE_8B: {
1664 $inputitem = $this->encodeMode8($inputitem, $version);
1665 break;
1666 }
1667 case QR_MODE_KJ: {
1668 $inputitem = $this->encodeModeKanji($inputitem, $version);
1669 break;
1670 }
1671 case QR_MODE_ST: {
1672 $inputitem = $this->encodeModeStructure($inputitem);
1673 break;
1674 }
1675 default: {
1676 break;
1677 }
1678 }
1679 }
1680 return $inputitem;
1681 }
1682
1683 // - - - - - - - - - - - - - - - - - - - - - - - - -
1684
1685 // QRinput
1686
1687 /**
1688 * Append data to an input object.
1689 * The data is copied and appended to the input object.
1690 * @param $items (arrray) input items
1691 * @param $mode (int) encoding mode.
1692 * @param $size (int) size of data (byte).
1693 * @param $data (array) array of input data.
1694 * @return items
1695 *
1696 */
1697 protected function appendNewInputItem($items, $mode, $size, $data) {
1698 $newitem = $this->newInputItem($mode, $size, $data);
1699 if (!empty($newitem)) {
1700 $items[] = $newitem;
1701 }
1702 return $items;
1703 }
1704
1705 /**
1706 * insertStructuredAppendHeader
1707 * @param $items (array)
1708 * @param $size (int)
1709 * @param $index (int)
1710 * @param $parity (int)
1711 * @return array items
1712 */
1713 protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
1714 if ($size > MAX_STRUCTURED_SYMBOLS) {
1715 return -1;
1716 }
1717 if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
1718 return -1;
1719 }
1720 $buf = array($size, $index, $parity);
1721 $entry = $this->newInputItem(QR_MODE_ST, 3, buf);
1722 array_unshift($items, $entry);
1723 return $items;
1724 }
1725
1726 /**
1727 * calcParity
1728 * @param $items (array)
1729 * @return int parity
1730 */
1731 protected function calcParity($items) {
1732 $parity = 0;
1733 foreach ($items as $item) {
1734 if ($item['mode'] != QR_MODE_ST) {
1735 for ($i=$item['size']-1; $i>=0; --$i) {
1736 $parity ^= $item['data'][$i];
1737 }
1738 }
1739 }
1740 return $parity;
1741 }
1742
1743 /**
1744 * checkModeNum
1745 * @param $size (int)
1746 * @param $data (array)
1747 * @return boolean true or false
1748 */
1749 protected function checkModeNum($size, $data) {
1750 for ($i=0; $i<$size; ++$i) {
1751 if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
1752 return false;
1753 }
1754 }
1755 return true;
1756 }
1757
1758 /**
1759 * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
1760 * @param $c (int) character value
1761 * @return value
1762 */
1763 protected function lookAnTable($c) {
1764 return (($c > 127)?-1:$this->anTable[$c]);
1765 }
1766
1767 /**
1768 * checkModeAn
1769 * @param $size (int)
1770 * @param $data (array)
1771 * @return boolean true or false
1772 */
1773 protected function checkModeAn($size, $data) {
1774 for ($i=0; $i<$size; ++$i) {
1775 if ($this->lookAnTable(ord($data[$i])) == -1) {
1776 return false;
1777 }
1778 }
1779 return true;
1780 }
1781
1782 /**
1783 * estimateBitsModeNum
1784 * @param $size (int)
1785 * @return int number of bits
1786 */
1787 protected function estimateBitsModeNum($size) {
1788 $w = (int)($size / 3);
1789 $bits = ($w * 10);
1790 switch($size - ($w * 3)) {
1791 case 1: {
1792 $bits += 4;
1793 break;
1794 }
1795 case 2: {
1796 $bits += 7;
1797 break;
1798 }
1799 }
1800 return $bits;
1801 }
1802
1803 /**
1804 * estimateBitsModeAn
1805 * @param $size (int)
1806 * @return int number of bits
1807 */
1808 protected function estimateBitsModeAn($size) {
1809 $bits = (int)($size * 5.5); // (size / 2 ) * 11
1810 if ($size & 1) {
1811 $bits += 6;
1812 }
1813 return $bits;
1814 }
1815
1816 /**
1817 * estimateBitsMode8
1818 * @param $size (int)
1819 * @return int number of bits
1820 */
1821 protected function estimateBitsMode8($size) {
1822 return (int)($size * 8);
1823 }
1824
1825 /**
1826 * estimateBitsModeKanji
1827 * @param $size (int)
1828 * @return int number of bits
1829 */
1830 protected function estimateBitsModeKanji($size) {
1831 return (int)($size * 6.5); // (size / 2 ) * 13
1832 }
1833
1834 /**
1835 * checkModeKanji
1836 * @param $size (int)
1837 * @param $data (array)
1838 * @return boolean true or false
1839 */
1840 protected function checkModeKanji($size, $data) {
1841 if ($size & 1) {
1842 return false;
1843 }
1844 for ($i=0; $i<$size; $i+=2) {
1845 $val = (ord($data[$i]) << 8) | ord($data[$i+1]);
1846 if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) {
1847 return false;
1848 }
1849 }
1850 return true;
1851 }
1852
1853 /**
1854 * Validate the input data.
1855 * @param $mode (int) encoding mode.
1856 * @param $size (int) size of data (byte).
1857 * @param $data (array) data to validate
1858 * @return boolean true in case of valid data, false otherwise
1859 */
1860 protected function check($mode, $size, $data) {
1861 if ($size <= 0) {
1862 return false;
1863 }
1864 switch($mode) {
1865 case QR_MODE_NM: {
1866 return $this->checkModeNum($size, $data);
1867 }
1868 case QR_MODE_AN: {
1869 return $this->checkModeAn($size, $data);
1870 }
1871 case QR_MODE_KJ: {
1872 return $this->checkModeKanji($size, $data);
1873 }
1874 case QR_MODE_8B: {
1875 return true;
1876 }
1877 case QR_MODE_ST: {
1878 return true;
1879 }
1880 default: {
1881 break;
1882 }
1883 }
1884 return false;
1885 }
1886
1887 /**
1888 * estimateBitStreamSize
1889 * @param $items (array)
1890 * @param $version (int)
1891 * @return int bits
1892 */
1893 protected function estimateBitStreamSize($items, $version) {
1894 $bits = 0;
1895 if ($version == 0) {
1896 $version = 1;
1897 }
1898 foreach ($items as $item) {
1899 switch($item['mode']) {
1900 case QR_MODE_NM: {
1901 $bits = $this->estimateBitsModeNum($item['size']);
1902 break;
1903 }
1904 case QR_MODE_AN: {
1905 $bits = $this->estimateBitsModeAn($item['size']);
1906 break;
1907 }
1908 case QR_MODE_8B: {
1909 $bits = $this->estimateBitsMode8($item['size']);
1910 break;
1911 }
1912 case QR_MODE_KJ: {
1913 $bits = $this->estimateBitsModeKanji($item['size']);
1914 break;
1915 }
1916 case QR_MODE_ST: {
1917 return STRUCTURE_HEADER_BITS;
1918 }
1919 default: {
1920 return 0;
1921 }
1922 }
1923 $l = $this->lengthIndicator($item['mode'], $version);
1924 $m = 1 << $l;
1925 $num = (int)(($item['size'] + $m - 1) / $m);
1926 $bits += $num * (4 + $l);
1927 }
1928 return $bits;
1929 }
1930
1931 /**
1932 * estimateVersion
1933 * @param $items (array)
1934 * @return int version
1935 */
1936 protected function estimateVersion($items) {
1937 $version = 0;
1938 $prev = 0;
1939 do {
1940 $prev = $version;
1941 $bits = $this->estimateBitStreamSize($items, $prev);
1942 $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
1943 if ($version < 0) {
1944 return -1;
1945 }
1946 } while ($version > $prev);
1947 return $version;
1948 }
1949
1950 /**
1951 * lengthOfCode
1952 * @param $mode (int)
1953 * @param $version (int)
1954 * @param $bits (int)
1955 * @return int size
1956 */
1957 protected function lengthOfCode($mode, $version, $bits) {
1958 $payload = $bits - 4 - $this->lengthIndicator($mode, $version);
1959 switch($mode) {
1960 case QR_MODE_NM: {
1961 $chunks = (int)($payload / 10);
1962 $remain = $payload - $chunks * 10;
1963 $size = $chunks * 3;
1964 if ($remain >= 7) {
1965 $size += 2;
1966 } elseif ($remain >= 4) {
1967 $size += 1;
1968 }
1969 break;
1970 }
1971 case QR_MODE_AN: {
1972 $chunks = (int)($payload / 11);
1973 $remain = $payload - $chunks * 11;
1974 $size = $chunks * 2;
1975 if ($remain >= 6) {
1976 ++$size;
1977 }
1978 break;
1979 }
1980 case QR_MODE_8B: {
1981 $size = (int)($payload / 8);
1982 break;
1983 }
1984 case QR_MODE_KJ: {
1985 $size = (int)(($payload / 13) * 2);
1986 break;
1987 }
1988 case QR_MODE_ST: {
1989 $size = (int)($payload / 8);
1990 break;
1991 }
1992 default: {
1993 $size = 0;
1994 break;
1995 }
1996 }
1997 $maxsize = $this->maximumWords($mode, $version);
1998 if ($size < 0) {
1999 $size = 0;
2000 }
2001 if ($size > $maxsize) {
2002 $size = $maxsize;
2003 }
2004 return $size;
2005 }
2006
2007 /**
2008 * createBitStream
2009 * @param $items (array)
2010 * @return array of items and total bits
2011 */
2012 protected function createBitStream($items) {
2013 $total = 0;
2014 foreach ($items as $key => $item) {
2015 $items[$key] = $this->encodeBitStream($item, $this->version);
2016 $bits = count($items[$key]['bstream']);
2017 $total += $bits;
2018 }
2019 return array($items, $total);
2020 }
2021
2022 /**
2023 * convertData
2024 * @param $items (array)
2025 * @return array items
2026 */
2027 protected function convertData($items) {
2028 $ver = $this->estimateVersion($items);
2029 if ($ver > $this->version) {
2030 $this->version = $ver;
2031 }
2032 while (true) {
2033 $cbs = $this->createBitStream($items);
2034 $items = $cbs[0];
2035 $bits = $cbs[1];
2036 if ($bits < 0) {
2037 return -1;
2038 }
2039 $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
2040 if ($ver < 0) {
2041 return -1;
2042 } elseif ($ver > $this->version) {
2043 $this->version = $ver;
2044 } else {
2045 break;
2046 }
2047 }
2048 return $items;
2049 }
2050
2051 /**
2052 * Append Padding Bit to bitstream
2053 * @param $bstream (array)
2054 * @return array bitstream
2055 */
2056 protected function appendPaddingBit($bstream) {
2057 if (is_null($bstream)) {
2058 return null;
2059 }
2060 $bits = count($bstream);
2061 $maxwords = $this->getDataLength($this->version, $this->level);
2062 $maxbits = $maxwords * 8;
2063 if ($maxbits == $bits) {
2064 return $bstream;
2065 }
2066 if ($maxbits - $bits < 5) {
2067 return $this->appendNum($bstream, $maxbits - $bits, 0);
2068 }
2069 $bits += 4;
2070 $words = (int)(($bits + 7) / 8);
2071 $padding = array();
2072 $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
2073 $padlen = $maxwords - $words;
2074 if ($padlen > 0) {
2075 $padbuf = array();
2076 for ($i=0; $i<$padlen; ++$i) {
2077 $padbuf[$i] = ($i&1)?0x11:0xec;
2078 }
2079 $padding = $this->appendBytes($padding, $padlen, $padbuf);
2080 }
2081 return $this->appendBitstream($bstream, $padding);
2082 }
2083
2084 /**
2085 * mergeBitStream
2086 * @param $items (array) items
2087 * @return array bitstream
2088 */
2089 protected function mergeBitStream($items) {
2090 $items = $this->convertData($items);
2091 if (!is_array($items)) {
2092 return null;
2093 }
2094 $bstream = array();
2095 foreach ($items as $item) {
2096 $bstream = $this->appendBitstream($bstream, $item['bstream']);
2097 }
2098 return $bstream;
2099 }
2100
2101 /**
2102 * Returns a stream of bits.
2103 * @param $items (int)
2104 * @return array padded merged byte stream
2105 */
2106 protected function getBitStream($items) {
2107 $bstream = $this->mergeBitStream($items);
2108 return $this->appendPaddingBit($bstream);
2109 }
2110
2111 /**
2112 * Pack all bit streams padding bits into a byte array.
2113 * @param $items (int)
2114 * @return array padded merged byte stream
2115 */
2116 protected function getByteStream($items) {
2117 $bstream = $this->getBitStream($items);
2118 return $this->bitstreamToByte($bstream);
2119 }
2120
2121 // - - - - - - - - - - - - - - - - - - - - - - - - -
2122
2123 // QRbitstream
2124
2125 /**
2126 * Return an array with zeros
2127 * @param $setLength (int) array size
2128 * @return array
2129 */
2130 protected function allocate($setLength) {
2131 return array_fill(0, $setLength, 0);
2132 }
2133
2134 /**
2135 * Return new bitstream from number
2136 * @param $bits (int) number of bits
2137 * @param $num (int) number
2138 * @return array bitstream
2139 */
2140 protected function newFromNum($bits, $num) {
2141 $bstream = $this->allocate($bits);
2142 $mask = 1 << ($bits - 1);
2143 for ($i=0; $i<$bits; ++$i) {
2144 if ($num & $mask) {
2145 $bstream[$i] = 1;
2146 } else {
2147 $bstream[$i] = 0;
2148 }
2149 $mask = $mask >> 1;
2150 }
2151 return $bstream;
2152 }
2153
2154 /**
2155 * Return new bitstream from bytes
2156 * @param $size (int) size
2157 * @param $data (array) bytes
2158 * @return array bitstream
2159 */
2160 protected function newFromBytes($size, $data) {
2161 $bstream = $this->allocate($size * 8);
2162 $p=0;
2163 for ($i=0; $i<$size; ++$i) {
2164 $mask = 0x80;
2165 for ($j=0; $j<8; ++$j) {
2166 if ($data[$i] & $mask) {
2167 $bstream[$p] = 1;
2168 } else {
2169 $bstream[$p] = 0;
2170 }
2171 $p++;
2172 $mask = $mask >> 1;
2173 }
2174 }
2175 return $bstream;
2176 }
2177
2178 /**
2179 * Append one bitstream to another
2180 * @param $bitstream (array) original bitstream
2181 * @param $append (array) bitstream to append
2182 * @return array bitstream
2183 */
2184 protected function appendBitstream($bitstream, $append) {
2185 if ((!is_array($append)) OR (count($append) == 0)) {
2186 return $bitstream;
2187 }
2188 if (count($bitstream) == 0) {
2189 return $append;
2190 }
2191 return array_values(array_merge($bitstream, $append));
2192 }
2193
2194 /**
2195 * Append one bitstream created from number to another
2196 * @param $bitstream (array) original bitstream
2197 * @param $bits (int) number of bits
2198 * @param $num (int) number
2199 * @return array bitstream
2200 */
2201 protected function appendNum($bitstream, $bits, $num) {
2202 if ($bits == 0) {
2203 return 0;
2204 }
2205 $b = $this->newFromNum($bits, $num);
2206 return $this->appendBitstream($bitstream, $b);
2207 }
2208
2209 /**
2210 * Append one bitstream created from bytes to another
2211 * @param $bitstream (array) original bitstream
2212 * @param $size (int) size
2213 * @param $data (array) bytes
2214 * @return array bitstream
2215 */
2216 protected function appendBytes($bitstream, $size, $data) {
2217 if ($size == 0) {
2218 return 0;
2219 }
2220 $b = $this->newFromBytes($size, $data);
2221 return $this->appendBitstream($bitstream, $b);
2222 }
2223
2224 /**
2225 * Convert bitstream to bytes
2226 * @param $bstream (array) original bitstream
2227 * @return array of bytes
2228 */
2229 protected function bitstreamToByte($bstream) {
2230 if (is_null($bstream)) {
2231 return null;
2232 }
2233 $size = count($bstream);
2234 if ($size == 0) {
2235 return array();
2236 }
2237 $data = array_fill(0, (int)(($size + 7) / 8), 0);
2238 $bytes = (int)($size / 8);
2239 $p = 0;
2240 for ($i=0; $i<$bytes; $i++) {
2241 $v = 0;
2242 for ($j=0; $j<8; $j++) {
2243 $v = $v << 1;
2244 $v |= $bstream[$p];
2245 $p++;
2246 }
2247 $data[$i] = $v;
2248 }
2249 if ($size & 7) {
2250 $v = 0;
2251 for ($j=0; $j<($size & 7); $j++) {
2252 $v = $v << 1;
2253 $v |= $bstream[$p];
2254 $p++;
2255 }
2256 $data[$bytes] = $v;
2257 }
2258 return $data;
2259 }
2260
2261 // - - - - - - - - - - - - - - - - - - - - - - - - -
2262
2263 // QRspec
2264
2265 /**
2266 * Replace a value on the array at the specified position
2267 * @param $srctab (array)
2268 * @param $x (int) X position
2269 * @param $y (int) Y position
2270 * @param $repl (string) value to replace
2271 * @param $replLen (int) length of the repl string
2272 * @return array srctab
2273 */
2274 protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) {
2275 $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
2276 return $srctab;
2277 }
2278
2279 /**
2280 * Return maximum data code length (bytes) for the version.
2281 * @param $version (int) version
2282 * @param $level (int) error correction level
2283 * @return int maximum size (bytes)
2284 */
2285 protected function getDataLength($version, $level) {
2286 return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level];
2287 }
2288
2289 /**
2290 * Return maximum error correction code length (bytes) for the version.
2291 * @param $version (int) version
2292 * @param $level (int) error correction level
2293 * @return int ECC size (bytes)
2294 */
2295 protected function getECCLength($version, $level){
2296 return $this->capacity[$version][QRCAP_EC][$level];
2297 }
2298
2299 /**
2300 * Return the width of the symbol for the version.
2301 * @param $version (int) version
2302 * @return int width
2303 */
2304 protected function getWidth($version) {
2305 return $this->capacity[$version][QRCAP_WIDTH];
2306 }
2307
2308 /**
2309 * Return the numer of remainder bits.
2310 * @param $version (int) version
2311 * @return int number of remainder bits
2312 */
2313 protected function getRemainder($version) {
2314 return $this->capacity[$version][QRCAP_REMINDER];
2315 }
2316
2317 /**
2318 * Return a version number that satisfies the input code length.
2319 * @param $size (int) input code length (bytes)
2320 * @param $level (int) error correction level
2321 * @return int version number
2322 */
2323 protected function getMinimumVersion($size, $level) {
2324 for ($i = 1; $i <= QRSPEC_VERSION_MAX; ++$i) {
2325 $words = ($this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]);
2326 if ($words >= $size) {
2327 return $i;
2328 }
2329 }
2330 // the size of input data is greater than QR capacity, try to lover the error correction mode
2331 return -1;
2332 }
2333
2334 /**
2335 * Return the size of length indicator for the mode and version.
2336 * @param $mode (int) encoding mode
2337 * @param $version (int) version
2338 * @return int the size of the appropriate length indicator (bits).
2339 */
2340 protected function lengthIndicator($mode, $version) {
2341 if ($mode == QR_MODE_ST) {
2342 return 0;
2343 }
2344 if ($version <= 9) {
2345 $l = 0;
2346 } elseif ($version <= 26) {
2347 $l = 1;
2348 } else {
2349 $l = 2;
2350 }
2351 return $this->lengthTableBits[$mode][$l];
2352 }
2353
2354 /**
2355 * Return the maximum length for the mode and version.
2356 * @param $mode (int) encoding mode
2357 * @param $version (int) version
2358 * @return int the maximum length (bytes)
2359 */
2360 protected function maximumWords($mode, $version) {
2361 if ($mode == QR_MODE_ST) {
2362 return 3;
2363 }
2364 if ($version <= 9) {
2365 $l = 0;
2366 } else if ($version <= 26) {
2367 $l = 1;
2368 } else {
2369 $l = 2;
2370 }
2371 $bits = $this->lengthTableBits[$mode][$l];
2372 $words = (1 << $bits) - 1;
2373 if ($mode == QR_MODE_KJ) {
2374 $words *= 2; // the number of bytes is required
2375 }
2376 return $words;
2377 }
2378
2379 /**
2380 * Return an array of ECC specification.
2381 * @param $version (int) version
2382 * @param $level (int) error correction level
2383 * @param $spec (array) an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code}
2384 * @return array spec
2385 */
2386 protected function getEccSpec($version, $level, $spec) {
2387 if (count($spec) < 5) {
2388 $spec = array(0, 0, 0, 0, 0);
2389 }
2390 $b1 = $this->eccTable[$version][$level][0];
2391 $b2 = $this->eccTable[$version][$level][1];
2392 $data = $this->getDataLength($version, $level);
2393 $ecc = $this->getECCLength($version, $level);
2394 if ($b2 == 0) {
2395 $spec[0] = $b1;
2396 $spec[1] = (int)($data / $b1);
2397 $spec[2] = (int)($ecc / $b1);
2398 $spec[3] = 0;
2399 $spec[4] = 0;
2400 } else {
2401 $spec[0] = $b1;
2402 $spec[1] = (int)($data / ($b1 + $b2));
2403 $spec[2] = (int)($ecc / ($b1 + $b2));
2404 $spec[3] = $b2;
2405 $spec[4] = $spec[1] + 1;
2406 }
2407 return $spec;
2408 }
2409
2410 /**
2411 * Put an alignment marker.
2412 * @param $frame (array) frame
2413 * @param $ox (int) X center coordinate of the pattern
2414 * @param $oy (int) Y center coordinate of the pattern
2415 * @return array frame
2416 */
2417 protected function putAlignmentMarker($frame, $ox, $oy) {
2418 $finder = array(
2419 "\xa1\xa1\xa1\xa1\xa1",
2420 "\xa1\xa0\xa0\xa0\xa1",
2421 "\xa1\xa0\xa1\xa0\xa1",
2422 "\xa1\xa0\xa0\xa0\xa1",
2423 "\xa1\xa1\xa1\xa1\xa1"
2424 );
2425 $yStart = $oy - 2;
2426 $xStart = $ox - 2;
2427 for ($y=0; $y < 5; $y++) {
2428 $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]);
2429 }
2430 return $frame;
2431 }
2432
2433 /**
2434 * Put an alignment pattern.
2435 * @param $version (int) version
2436 * @param $frame (array) frame
2437 * @param $width (int) width
2438 * @return array frame
2439 */
2440 protected function putAlignmentPattern($version, $frame, $width) {
2441 if ($version < 2) {
2442 return $frame;
2443 }
2444 $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0];
2445 if ($d < 0) {
2446 $w = 2;
2447 } else {
2448 $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2);
2449 }
2450 if ($w * $w - 3 == 1) {
2451 $x = $this->alignmentPattern[$version][0];
2452 $y = $this->alignmentPattern[$version][0];
2453 $frame = $this->putAlignmentMarker($frame, $x, $y);
2454 return $frame;
2455 }
2456 $cx = $this->alignmentPattern[$version][0];
2457 $wo = $w - 1;
2458 for ($x=1; $x < $wo; ++$x) {
2459 $frame = $this->putAlignmentMarker($frame, 6, $cx);
2460 $frame = $this->putAlignmentMarker($frame, $cx, 6);
2461 $cx += $d;
2462 }
2463 $cy = $this->alignmentPattern[$version][0];
2464 for ($y=0; $y < $wo; ++$y) {
2465 $cx = $this->alignmentPattern[$version][0];
2466 for ($x=0; $x < $wo; ++$x) {
2467 $frame = $this->putAlignmentMarker($frame, $cx, $cy);
2468 $cx += $d;
2469 }
2470 $cy += $d;
2471 }
2472 return $frame;
2473 }
2474
2475 /**
2476 * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits.
2477 * @param $version (int) version
2478 * @return BCH encoded version information pattern
2479 */
2480 protected function getVersionPattern($version) {
2481 if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) {
2482 return 0;
2483 }
2484 return $this->versionPattern[($version - 7)];
2485 }
2486
2487 /**
2488 * Return BCH encoded format information pattern.
2489 * @param $mask (array)
2490 * @param $level (int) error correction level
2491 * @return BCH encoded format information pattern
2492 */
2493 protected function getFormatInfo($mask, $level) {
2494 if (($mask < 0) OR ($mask > 7)) {
2495 return 0;
2496 }
2497 if (($level < 0) OR ($level > 3)) {
2498 return 0;
2499 }
2500 return $this->formatInfo[$level][$mask];
2501 }
2502
2503 /**
2504 * Put a finder pattern.
2505 * @param $frame (array) frame
2506 * @param $ox (int) X center coordinate of the pattern
2507 * @param $oy (int) Y center coordinate of the pattern
2508 * @return array frame
2509 */
2510 protected function putFinderPattern($frame, $ox, $oy) {
2511 $finder = array(
2512 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
2513 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2514 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2515 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2516 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2517 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2518 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
2519 );
2520 for ($y=0; $y < 7; $y++) {
2521 $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
2522 }
2523 return $frame;
2524 }
2525
2526 /**
2527 * Return a copy of initialized frame.
2528 * @param $version (int) version
2529 * @return Array of unsigned char.
2530 */
2531 protected function createFrame($version) {
2532 $width = $this->capacity[$version][QRCAP_WIDTH];
2533 $frameLine = str_repeat ("\0", $width);
2534 $frame = array_fill(0, $width, $frameLine);
2535 // Finder pattern
2536 $frame = $this->putFinderPattern($frame, 0, 0);
2537 $frame = $this->putFinderPattern($frame, $width - 7, 0);
2538 $frame = $this->putFinderPattern($frame, 0, $width - 7);
2539 // Separator
2540 $yOffset = $width - 7;
2541 for ($y=0; $y < 7; ++$y) {
2542 $frame[$y][7] = "\xc0";
2543 $frame[$y][$width - 8] = "\xc0";
2544 $frame[$yOffset][7] = "\xc0";
2545 ++$yOffset;
2546 }
2547 $setPattern = str_repeat("\xc0", 8);
2548 $frame = $this->qrstrset($frame, 0, 7, $setPattern);
2549 $frame = $this->qrstrset($frame, $width-8, 7, $setPattern);
2550 $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
2551 // Format info
2552 $setPattern = str_repeat("\x84", 9);
2553 $frame = $this->qrstrset($frame, 0, 8, $setPattern);
2554 $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8);
2555 $yOffset = $width - 8;
2556 for ($y=0; $y < 8; ++$y,++$yOffset) {
2557 $frame[$y][8] = "\x84";
2558 $frame[$yOffset][8] = "\x84";
2559 }
2560 // Timing pattern
2561 $wo = $width - 15;
2562 for ($i=1; $i < $wo; ++$i) {
2563 $frame[6][7+$i] = chr(0x90 | ($i & 1));
2564 $frame[7+$i][6] = chr(0x90 | ($i & 1));
2565 }
2566 // Alignment pattern
2567 $frame = $this->putAlignmentPattern($version, $frame, $width);
2568 // Version information
2569 if ($version >= 7) {
2570 $vinf = $this->getVersionPattern($version);
2571 $v = $vinf;
2572 for ($x=0; $x<6; ++$x) {
2573 for ($y=0; $y<3; ++$y) {
2574 $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
2575 $v = $v >> 1;
2576 }
2577 }
2578 $v = $vinf;
2579 for ($y=0; $y<6; ++$y) {
2580 for ($x=0; $x<3; ++$x) {
2581 $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
2582 $v = $v >> 1;
2583 }
2584 }
2585 }
2586 // and a little bit...
2587 $frame[$width - 8][8] = "\x81";
2588 return $frame;
2589 }
2590
2591 /**
2592 * Set new frame for the specified version.
2593 * @param $version (int) version
2594 * @return Array of unsigned char.
2595 */
2596 protected function newFrame($version) {
2597 if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) {
2598 return NULL;
2599 }
2600 if (!isset($this->frames[$version])) {
2601 $this->frames[$version] = $this->createFrame($version);
2602 }
2603 if (is_null($this->frames[$version])) {
2604 return NULL;
2605 }
2606 return $this->frames[$version];
2607 }
2608
2609 /**
2610 * Return block number 0
2611 * @param $spec (array)
2612 * @return int value
2613 */
2614 protected function rsBlockNum($spec) {
2615 return ($spec[0] + $spec[3]);
2616 }
2617
2618 /**
2619 * Return block number 1
2620 * @param $spec (array)
2621 * @return int value
2622 */
2623 protected function rsBlockNum1($spec) {
2624 return $spec[0];
2625 }
2626
2627 /**
2628 * Return data codes 1
2629 * @param $spec (array)
2630 * @return int value
2631 */
2632 protected function rsDataCodes1($spec) {
2633 return $spec[1];
2634 }
2635
2636 /**
2637 * Return ecc codes 1
2638 * @param $spec (array)
2639 * @return int value
2640 */
2641 protected function rsEccCodes1($spec) {
2642 return $spec[2];
2643 }
2644
2645 /**
2646 * Return block number 2
2647 * @param $spec (array)
2648 * @return int value
2649 */
2650 protected function rsBlockNum2($spec) {
2651 return $spec[3];
2652 }
2653
2654 /**
2655 * Return data codes 2
2656 * @param $spec (array)
2657 * @return int value
2658 */
2659 protected function rsDataCodes2($spec) {
2660 return $spec[4];
2661 }
2662
2663 /**
2664 * Return ecc codes 2
2665 * @param $spec (array)
2666 * @return int value
2667 */
2668 protected function rsEccCodes2($spec) {
2669 return $spec[2];
2670 }
2671
2672 /**
2673 * Return data length
2674 * @param $spec (array)
2675 * @return int value
2676 */
2677 protected function rsDataLength($spec) {
2678 return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
2679 }
2680
2681 /**
2682 * Return ecc length
2683 * @param $spec (array)
2684 * @return int value
2685 */
2686 protected function rsEccLength($spec) {
2687 return ($spec[0] + $spec[3]) * $spec[2];
2688 }
2689
2690 // - - - - - - - - - - - - - - - - - - - - - - - - -
2691
2692 // QRrs
2693
2694 /**
2695 * Initialize a Reed-Solomon codec and add it to existing rsitems
2696 * @param $symsize (int) symbol size, bits
2697 * @param $gfpoly (int) Field generator polynomial coefficients
2698 * @param $fcr (int) first root of RS code generator polynomial, index form
2699 * @param $prim (int) primitive element to generate polynomial roots
2700 * @param $nroots (int) RS code generator polynomial degree (number of roots)
2701 * @param $pad (int) padding bytes at front of shortened block
2702 * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2703 */
2704 protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2705 foreach ($this->rsitems as $rs) {
2706 if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize)
2707 OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) {
2708 continue;
2709 }
2710 return $rs;
2711 }
2712 $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);
2713 array_unshift($this->rsitems, $rs);
2714 return $rs;
2715 }
2716
2717 // - - - - - - - - - - - - - - - - - - - - - - - - -
2718
2719 // QRrsItem
2720
2721 /**
2722 * modnn
2723 * @param $rs (array) RS values
2724 * @param $x (int) X position
2725 * @return int X osition
2726 */
2727 protected function modnn($rs, $x) {
2728 while ($x >= $rs['nn']) {
2729 $x -= $rs['nn'];
2730 $x = ($x >> $rs['mm']) + ($x & $rs['nn']);
2731 }
2732 return $x;
2733 }
2734
2735 /**
2736 * Initialize a Reed-Solomon codec and returns an array of values.
2737 * @param $symsize (int) symbol size, bits
2738 * @param $gfpoly (int) Field generator polynomial coefficients
2739 * @param $fcr (int) first root of RS code generator polynomial, index form
2740 * @param $prim (int) primitive element to generate polynomial roots
2741 * @param $nroots (int) RS code generator polynomial degree (number of roots)
2742 * @param $pad (int) padding bytes at front of shortened block
2743 * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2744 */
2745 protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2746 // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
2747 $rs = null;
2748 // Check parameter ranges
2749 if (($symsize < 0) OR ($symsize > 8)) {
2750 return $rs;
2751 }
2752 if (($fcr < 0) OR ($fcr >= (1<<$symsize))) {
2753 return $rs;
2754 }
2755 if (($prim <= 0) OR ($prim >= (1<<$symsize))) {
2756 return $rs;
2757 }
2758 if (($nroots < 0) OR ($nroots >= (1<<$symsize))) {
2759 return $rs;
2760 }
2761 if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) {
2762 return $rs;
2763 }
2764 $rs = array();
2765 $rs['mm'] = $symsize;
2766 $rs['nn'] = (1 << $symsize) - 1;
2767 $rs['pad'] = $pad;
2768 $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0);
2769 $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0);
2770 // PHP style macro replacement ;)
2771 $NN =& $rs['nn'];
2772 $A0 =& $NN;
2773 // Generate Galois field lookup tables
2774 $rs['index_of'][0] = $A0; // log(zero) = -inf
2775 $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
2776 $sr = 1;
2777 for ($i=0; $i<$rs['nn']; ++$i) {
2778 $rs['index_of'][$sr] = $i;
2779 $rs['alpha_to'][$i] = $sr;
2780 $sr <<= 1;
2781 if ($sr & (1 << $symsize)) {
2782 $sr ^= $gfpoly;
2783 }
2784 $sr &= $rs['nn'];
2785 }
2786 if ($sr != 1) {
2787 // field generator polynomial is not primitive!
2788 return NULL;
2789 }
2790 // Form RS code generator polynomial from its roots
2791 $rs['genpoly'] = array_fill(0, ($nroots + 1), 0);
2792 $rs['fcr'] = $fcr;
2793 $rs['prim'] = $prim;
2794 $rs['nroots'] = $nroots;
2795 $rs['gfpoly'] = $gfpoly;
2796 // Find prim-th root of 1, used in decoding
2797 for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) {
2798 ; // intentional empty-body loop!
2799 }
2800 $rs['iprim'] = (int)($iprim / $prim);
2801 $rs['genpoly'][0] = 1;
2802 for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) {
2803 $rs['genpoly'][$i+1] = 1;
2804 // Multiply rs->genpoly[] by @**(root + x)
2805 for ($j = $i; $j > 0; --$j) {
2806 if ($rs['genpoly'][$j] != 0) {
2807 $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];
2808 } else {
2809 $rs['genpoly'][$j] = $rs['genpoly'][$j-1];
2810 }
2811 }
2812 // rs->genpoly[0] can never be zero
2813 $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
2814 }
2815 // convert rs->genpoly[] to index form for quicker encoding
2816 for ($i = 0; $i <= $nroots; ++$i) {
2817 $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
2818 }
2819 return $rs;
2820 }
2821
2822 /**
2823 * Encode a Reed-Solomon codec and returns the parity array
2824 * @param $rs (array) RS values
2825 * @param $data (array) data
2826 * @param $parity (array) parity
2827 * @return parity array
2828 */
2829 protected function encode_rs_char($rs, $data, $parity) {
2830 $MM =& $rs['mm']; // bits per symbol
2831 $NN =& $rs['nn']; // the total number of symbols in a RS block
2832 $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
2833 $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
2834 $GENPOLY =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
2835 $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
2836 $FCR =& $rs['fcr']; // first consecutive root, index form
2837 $PRIM =& $rs['prim']; // primitive element, index form
2838 $IPRIM =& $rs['iprim']; // prim-th root of 1, index form
2839 $PAD =& $rs['pad']; // the number of pad symbols in a block
2840 $A0 =& $NN;
2841 $parity = array_fill(0, $NROOTS, 0);
2842 for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) {
2843 $feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
2844 if ($feedback != $A0) {
2845 // feedback term is non-zero
2846 // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
2847 // always be for the polynomials constructed by init_rs()
2848 $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
2849 for ($j=1; $j < $NROOTS; ++$j) {
2850 $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
2851 }
2852 }
2853 // Shift
2854 array_shift($parity);
2855 if ($feedback != $A0) {
2856 array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]);
2857 } else {
2858 array_push($parity, 0);
2859 }
2860 }
2861 return $parity;
2862 }
2863
2864} // end QRcode class
2865
2866//============================================================+
2867// END OF FILE
2868//============================================================+
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