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   1  <?php
   2  //============================================================+
   3  // File name   : qrcode.php
   4  // Version     : 1.0.010
   5  // Begin       : 2010-03-22
   6  // Last Update : 2012-07-25
   7  // Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
   8  // License     : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
   9  // -------------------------------------------------------------------
  10  // Copyright (C) 2010-2012 Nicola Asuni - Tecnick.com LTD
  11  //
  12  // This file is part of TCPDF software library.
  13  //
  14  // TCPDF is free software: you can redistribute it and/or modify it
  15  // under the terms of the GNU Lesser General Public License as
  16  // published by the Free Software Foundation, either version 3 of the
  17  // License, or (at your option) any later version.
  18  //
  19  // TCPDF is distributed in the hope that it will be useful, but
  20  // WITHOUT ANY WARRANTY; without even the implied warranty of
  21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  22  // See the GNU Lesser General Public License for more details.
  23  //
  24  // You should have received a copy of the GNU Lesser General Public License
  25  // along with TCPDF.  If not, see <http://www.gnu.org/licenses/>.
  26  //
  27  // See LICENSE.TXT file for more information.
  28  // -------------------------------------------------------------------
  29  //
  30  // DESCRIPTION :
  31  //
  32  // Class to create QR-code arrays for TCPDF class.
  33  // QR Code symbol is a 2D barcode that can be scanned by
  34  // handy terminals such as a mobile phone with CCD.
  35  // The capacity of QR Code is up to 7000 digits or 4000
  36  // characters, and has high robustness.
  37  // This class supports QR Code model 2, described in
  38  // JIS (Japanese Industrial Standards) X0510:2004
  39  // or ISO/IEC 18004.
  40  // Currently the following features are not supported:
  41  // ECI and FNC1 mode, Micro QR Code, QR Code model 1,
  42  // Structured mode.
  43  //
  44  // This class is derived from the following projects:
  45  // ---------------------------------------------------------
  46  // "PHP QR Code encoder"
  47  // License: GNU-LGPLv3
  48  // Copyright (C) 2010 by Dominik Dzienia <deltalab at poczta dot fm>
  49  // http://phpqrcode.sourceforge.net/
  50  // https://sourceforge.net/projects/phpqrcode/
  51  //
  52  // The "PHP QR Code encoder" is based on
  53  // "C libqrencode library" (ver. 3.1.1)
  54  // License: GNU-LGPL 2.1
  55  // Copyright (C) 2006-2010 by Kentaro Fukuchi
  56  // http://megaui.net/fukuchi/works/qrencode/index.en.html
  57  //
  58  // Reed-Solomon code encoder is written by Phil Karn, KA9Q.
  59  // Copyright (C) 2002-2006 Phil Karn, KA9Q
  60  //
  61  // QR Code is registered trademark of DENSO WAVE INCORPORATED
  62  // http://www.denso-wave.com/qrcode/index-e.html
  63  // ---------------------------------------------------------
  64  //============================================================+
  65  
  66  /**
  67   * @file
  68   * Class to create QR-code arrays for TCPDF class.
  69   * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
  70   * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
  71   * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
  72   * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
  73   *
  74   * This class is derived from "PHP QR Code encoder" by Dominik Dzienia (http://phpqrcode.sourceforge.net/) based on "libqrencode C library 3.1.1." by Kentaro Fukuchi (http://megaui.net/fukuchi/works/qrencode/index.en.html), contains Reed-Solomon code written by Phil Karn, KA9Q. QR Code is registered trademark of DENSO WAVE INCORPORATED (http://www.denso-wave.com/qrcode/index-e.html).
  75   * Please read comments on this class source file for full copyright and license information.
  76   *
  77   * @package com.tecnick.tcpdf
  78   * @author Nicola Asuni
  79   * @version 1.0.010
  80   */
  81  
  82  // definitions
  83  if (!defined('QRCODEDEFS')) {
  84  
  85  	 /**
  86  	  * Indicate that definitions for this class are set
  87  	  */
  88  	 define('QRCODEDEFS', true);
  89  
  90  	 // -----------------------------------------------------
  91  
  92  	 // Encoding modes (characters which can be encoded in QRcode)
  93  
  94  	 /**
  95  	  * Encoding mode
  96  	  */
  97  	 define('QR_MODE_NL', -1);
  98  
  99  	 /**
 100  	  * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.
 101  	  */
 102  	 define('QR_MODE_NM', 0);
 103  
 104  	 /**
 105  	  * Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode.
 106  	  */
 107  	 define('QR_MODE_AN', 1);
 108  
 109  	 /**
 110  	  * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.
 111  	  */
 112  	 define('QR_MODE_8B', 2);
 113  
 114  	 /**
 115  	  * Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode.
 116  	  */
 117  	 define('QR_MODE_KJ', 3);
 118  
 119  	 /**
 120  	  * Encoding mode STRUCTURED (currently unsupported)
 121  	  */
 122  	 define('QR_MODE_ST', 4);
 123  
 124  	 // -----------------------------------------------------
 125  
 126  	 // Levels of error correction.
 127  	 // QRcode has a function of an error correcting for miss reading that white is black.
 128  	 // Error correcting is defined in 4 level as below.
 129  
 130  	 /**
 131  	  * Error correction level L : About 7% or less errors can be corrected.
 132  	  */
 133  	 define('QR_ECLEVEL_L', 0);
 134  
 135  	 /**
 136  	  * Error correction level M : About 15% or less errors can be corrected.
 137  	  */
 138  	 define('QR_ECLEVEL_M', 1);
 139  
 140  	 /**
 141  	  * Error correction level Q : About 25% or less errors can be corrected.
 142  	  */
 143  	 define('QR_ECLEVEL_Q', 2);
 144  
 145  	 /**
 146  	  * Error correction level H : About 30% or less errors can be corrected.
 147  	  */
 148  	 define('QR_ECLEVEL_H', 3);
 149  
 150  	 // -----------------------------------------------------
 151  
 152  	 // Version. Size of QRcode is defined as version.
 153  	 // Version is from 1 to 40.
 154  	 // Version 1 is 21*21 matrix. And 4 modules increases whenever 1 version increases.
 155  	 // So version 40 is 177*177 matrix.
 156  
 157  	 /**
 158  	  * Maximum QR Code version.
 159  	  */
 160  	 define('QRSPEC_VERSION_MAX', 40);
 161  
 162  	 /**
 163  	  * Maximum matrix size for maximum version (version 40 is 177*177 matrix).
 164  	  */
 165      define('QRSPEC_WIDTH_MAX', 177);
 166  
 167  	 // -----------------------------------------------------
 168  
 169  	 /**
 170  	  * Matrix index to get width from $capacity array.
 171  	  */
 172      define('QRCAP_WIDTH',    0);
 173  
 174      /**
 175  	  * Matrix index to get number of words from $capacity array.
 176  	  */
 177      define('QRCAP_WORDS',    1);
 178  
 179      /**
 180  	  * Matrix index to get remainder from $capacity array.
 181  	  */
 182      define('QRCAP_REMINDER', 2);
 183  
 184      /**
 185  	  * Matrix index to get error correction level from $capacity array.
 186  	  */
 187      define('QRCAP_EC',       3);
 188  
 189  	 // -----------------------------------------------------
 190  
 191  	 // Structure (currently usupported)
 192  
 193  	 /**
 194  	  * Number of header bits for structured mode
 195  	  */
 196      define('STRUCTURE_HEADER_BITS',  20);
 197  
 198      /**
 199  	  * Max number of symbols for structured mode
 200  	  */
 201      define('MAX_STRUCTURED_SYMBOLS', 16);
 202  
 203  	 // -----------------------------------------------------
 204  
 205      // Masks
 206  
 207      /**
 208  	  * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)
 209  	  */
 210      define('N1',  3);
 211  
 212      /**
 213  	  * Down point base value for case 2 mask pattern (module block of same color)
 214  	  */
 215  	 define('N2',  3);
 216  
 217      /**
 218  	  * Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column)
 219  	  */
 220  	 define('N3', 40);
 221  
 222      /**
 223  	  * Down point base value for case 4 mask pattern (ration of dark modules in whole)
 224  	  */
 225  	 define('N4', 10);
 226  
 227  	 // -----------------------------------------------------
 228  
 229  	 // Optimization settings
 230  
 231  	 /**
 232  	  * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code
 233  	  */
 234  	 define('QR_FIND_BEST_MASK', true);
 235  
 236  	 /**
 237  	  * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly
 238  	  */
 239  	 define('QR_FIND_FROM_RANDOM', 2);
 240  
 241  	 /**
 242  	  * when QR_FIND_BEST_MASK === false
 243  	  */
 244  	 define('QR_DEFAULT_MASK', 2);
 245  
 246  	 // -----------------------------------------------------
 247  
 248  } // end of definitions
 249  
 250  /**
 251   * @class QRcode
 252   * Class to create QR-code arrays for TCPDF class.
 253   * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD.
 254   * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness.
 255   * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004.
 256   * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode.
 257   *
 258   * 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).
 259   * Please read comments on this class source file for full copyright and license information.
 260   *
 261   * @package com.tecnick.tcpdf
 262   * @author Nicola Asuni
 263   * @version 1.0.010
 264   */
 265  class QRcode {
 266  
 267  	 /**
 268  	  * Barcode array to be returned which is readable by TCPDF.
 269  	  * @protected
 270  	  */
 271  	 protected $barcode_array = array();
 272  
 273  	 /**
 274  	  * 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.
 275  	  * @protected
 276  	  */
 277  	 protected $version = 0;
 278  
 279  	 /**
 280  	  * Levels of error correction. See definitions for possible values.
 281  	  * @protected
 282  	  */
 283  	 protected $level = QR_ECLEVEL_L;
 284  
 285  	 /**
 286  	  * Encoding mode.
 287  	  * @protected
 288  	  */
 289  	 protected $hint = QR_MODE_8B;
 290  
 291  	 /**
 292  	  * Boolean flag, if true the input string will be converted to uppercase.
 293  	  * @protected
 294  	  */
 295  	 protected $casesensitive = true;
 296  
 297  	 /**
 298  	  * Structured QR code (not supported yet).
 299  	  * @protected
 300  	  */
 301  	 protected $structured = 0;
 302  
 303  	 /**
 304  	  * Mask data.
 305  	  * @protected
 306  	  */
 307  	 protected $data;
 308  
 309  	 // FrameFiller
 310  
 311  	 /**
 312  	  * Width.
 313  	  * @protected
 314  	  */
 315  	 protected $width;
 316  
 317  	 /**
 318  	  * Frame.
 319  	  * @protected
 320  	  */
 321  	 protected $frame;
 322  
 323  	 /**
 324  	  * X position of bit.
 325  	  * @protected
 326  	  */
 327  	 protected $x;
 328  
 329  	 /**
 330  	  * Y position of bit.
 331  	  * @protected
 332  	  */
 333  	 protected $y;
 334  
 335  	 /**
 336  	  * Direction.
 337  	  * @protected
 338  	  */
 339  	 protected $dir;
 340  
 341  	 /**
 342  	  * Single bit value.
 343  	  * @protected
 344  	  */
 345  	 protected $bit;
 346  
 347  	 // ---- QRrawcode ----
 348  
 349  	 /**
 350  	  * Data code.
 351  	  * @protected
 352  	  */
 353  	 protected $datacode = array();
 354  
 355  	 /**
 356  	  * Error correction code.
 357  	  * @protected
 358  	  */
 359  	 protected $ecccode = array();
 360  
 361  	 /**
 362  	  * Blocks.
 363  	  * @protected
 364  	  */
 365  	 protected $blocks;
 366  
 367  	 /**
 368  	  * Reed-Solomon blocks.
 369  	  * @protected
 370  	  */
 371  	 protected $rsblocks = array(); //of RSblock
 372  
 373  	 /**
 374  	  * Counter.
 375  	  * @protected
 376  	  */
 377  	 protected $count;
 378  
 379  	 /**
 380  	  * Data length.
 381  	  * @protected
 382  	  */
 383  	 protected $dataLength;
 384  
 385  	 /**
 386  	  * Error correction length.
 387  	  * @protected
 388  	  */
 389  	 protected $eccLength;
 390  
 391  	 /**
 392  	  * Value b1.
 393  	  * @protected
 394  	  */
 395  	 protected $b1;
 396  
 397  	 // ---- QRmask ----
 398  
 399  	 /**
 400  	  * Run length.
 401  	  * @protected
 402  	  */
 403  	 protected $runLength = array();
 404  
 405  	 // ---- QRsplit ----
 406  
 407  	 /**
 408  	  * Input data string.
 409  	  * @protected
 410  	  */
 411  	 protected $dataStr = '';
 412  
 413  	 /**
 414  	  * Input items.
 415  	  * @protected
 416  	  */
 417  	 protected $items;
 418  
 419  	 // Reed-Solomon items
 420  
 421  	 /**
 422  	  * Reed-Solomon items.
 423  	  * @protected
 424  	  */
 425  	 protected $rsitems = array();
 426  
 427  	 /**
 428  	  * Array of frames.
 429  	  * @protected
 430  	  */
 431  	 protected $frames = array();
 432  
 433  	 /**
 434  	  * Alphabet-numeric convesion table.
 435  	  * @protected
 436  	  */
 437  	 protected $anTable = array(
 438  	 	 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
 439  	 	 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
 440  	 	 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, //
 441  	 	  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 44, -1, -1, -1, -1, -1, //
 442  	 	 -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, //
 443  	 	 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, //
 444  	 	 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, //
 445  	 	 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1  //
 446  	 	 );
 447  
 448  	 /**
 449  	  * Array Table of the capacity of symbols.
 450  	  * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
 451  	  * @protected
 452  	  */
 453  	 protected $capacity = array(
 454  	 	 array(  0,    0, 0, array(   0,    0,    0,    0)), //
 455  	 	 array( 21,   26, 0, array(   7,   10,   13,   17)), //  1
 456  	 	 array( 25,   44, 7, array(  10,   16,   22,   28)), //
 457  	 	 array( 29,   70, 7, array(  15,   26,   36,   44)), //
 458  	 	 array( 33,  100, 7, array(  20,   36,   52,   64)), //
 459  	 	 array( 37,  134, 7, array(  26,   48,   72,   88)), //  5
 460  	 	 array( 41,  172, 7, array(  36,   64,   96,  112)), //
 461  	 	 array( 45,  196, 0, array(  40,   72,  108,  130)), //
 462  	 	 array( 49,  242, 0, array(  48,   88,  132,  156)), //
 463  	 	 array( 53,  292, 0, array(  60,  110,  160,  192)), //
 464  	 	 array( 57,  346, 0, array(  72,  130,  192,  224)), // 10
 465  	 	 array( 61,  404, 0, array(  80,  150,  224,  264)), //
 466  	 	 array( 65,  466, 0, array(  96,  176,  260,  308)), //
 467  	 	 array( 69,  532, 0, array( 104,  198,  288,  352)), //
 468  	 	 array( 73,  581, 3, array( 120,  216,  320,  384)), //
 469  	 	 array( 77,  655, 3, array( 132,  240,  360,  432)), // 15
 470  	 	 array( 81,  733, 3, array( 144,  280,  408,  480)), //
 471  	 	 array( 85,  815, 3, array( 168,  308,  448,  532)), //
 472  	 	 array( 89,  901, 3, array( 180,  338,  504,  588)), //
 473  	 	 array( 93,  991, 3, array( 196,  364,  546,  650)), //
 474  	 	 array( 97, 1085, 3, array( 224,  416,  600,  700)), // 20
 475  	 	 array(101, 1156, 4, array( 224,  442,  644,  750)), //
 476  	 	 array(105, 1258, 4, array( 252,  476,  690,  816)), //
 477  	 	 array(109, 1364, 4, array( 270,  504,  750,  900)), //
 478  	 	 array(113, 1474, 4, array( 300,  560,  810,  960)), //
 479  	 	 array(117, 1588, 4, array( 312,  588,  870, 1050)), // 25
 480  	 	 array(121, 1706, 4, array( 336,  644,  952, 1110)), //
 481  	 	 array(125, 1828, 4, array( 360,  700, 1020, 1200)), //
 482  	 	 array(129, 1921, 3, array( 390,  728, 1050, 1260)), //
 483  	 	 array(133, 2051, 3, array( 420,  784, 1140, 1350)), //
 484  	 	 array(137, 2185, 3, array( 450,  812, 1200, 1440)), // 30
 485  	 	 array(141, 2323, 3, array( 480,  868, 1290, 1530)), //
 486  	 	 array(145, 2465, 3, array( 510,  924, 1350, 1620)), //
 487  	 	 array(149, 2611, 3, array( 540,  980, 1440, 1710)), //
 488  	 	 array(153, 2761, 3, array( 570, 1036, 1530, 1800)), //
 489  	 	 array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35
 490  	 	 array(161, 3034, 0, array( 600, 1120, 1680, 1980)), //
 491  	 	 array(165, 3196, 0, array( 630, 1204, 1770, 2100)), //
 492  	 	 array(169, 3362, 0, array( 660, 1260, 1860, 2220)), //
 493  	 	 array(173, 3532, 0, array( 720, 1316, 1950, 2310)), //
 494  	 	 array(177, 3706, 0, array( 750, 1372, 2040, 2430))  // 40
 495  	 );
 496  
 497  	 /**
 498  	  * Array Length indicator.
 499  	  * @protected
 500  	  */
 501  	 protected $lengthTableBits = array(
 502  	 	 array(10, 12, 14),
 503  	 	 array( 9, 11, 13),
 504  	 	 array( 8, 16, 16),
 505  	 	 array( 8, 10, 12)
 506  	 );
 507  
 508  	 /**
 509  	  * Array Table of the error correction code (Reed-Solomon block).
 510  	  * See Table 12-16 (pp.30-36), JIS X0510:2004.
 511  	  * @protected
 512  	  */
 513  	 protected $eccTable = array(
 514  	 	 array(array( 0,  0), array( 0,  0), array( 0,  0), array( 0,  0)), //
 515  	 	 array(array( 1,  0), array( 1,  0), array( 1,  0), array( 1,  0)), //  1
 516  	 	 array(array( 1,  0), array( 1,  0), array( 1,  0), array( 1,  0)), //
 517  	 	 array(array( 1,  0), array( 1,  0), array( 2,  0), array( 2,  0)), //
 518  	 	 array(array( 1,  0), array( 2,  0), array( 2,  0), array( 4,  0)), //
 519  	 	 array(array( 1,  0), array( 2,  0), array( 2,  2), array( 2,  2)), //  5
 520  	 	 array(array( 2,  0), array( 4,  0), array( 4,  0), array( 4,  0)), //
 521  	 	 array(array( 2,  0), array( 4,  0), array( 2,  4), array( 4,  1)), //
 522  	 	 array(array( 2,  0), array( 2,  2), array( 4,  2), array( 4,  2)), //
 523  	 	 array(array( 2,  0), array( 3,  2), array( 4,  4), array( 4,  4)), //
 524  	 	 array(array( 2,  2), array( 4,  1), array( 6,  2), array( 6,  2)), // 10
 525  	 	 array(array( 4,  0), array( 1,  4), array( 4,  4), array( 3,  8)), //
 526  	 	 array(array( 2,  2), array( 6,  2), array( 4,  6), array( 7,  4)), //
 527  	 	 array(array( 4,  0), array( 8,  1), array( 8,  4), array(12,  4)), //
 528  	 	 array(array( 3,  1), array( 4,  5), array(11,  5), array(11,  5)), //
 529  	 	 array(array( 5,  1), array( 5,  5), array( 5,  7), array(11,  7)), // 15
 530  	 	 array(array( 5,  1), array( 7,  3), array(15,  2), array( 3, 13)), //
 531  	 	 array(array( 1,  5), array(10,  1), array( 1, 15), array( 2, 17)), //
 532  	 	 array(array( 5,  1), array( 9,  4), array(17,  1), array( 2, 19)), //
 533  	 	 array(array( 3,  4), array( 3, 11), array(17,  4), array( 9, 16)), //
 534  	 	 array(array( 3,  5), array( 3, 13), array(15,  5), array(15, 10)), // 20
 535  	 	 array(array( 4,  4), array(17,  0), array(17,  6), array(19,  6)), //
 536  	 	 array(array( 2,  7), array(17,  0), array( 7, 16), array(34,  0)), //
 537  	 	 array(array( 4,  5), array( 4, 14), array(11, 14), array(16, 14)), //
 538  	 	 array(array( 6,  4), array( 6, 14), array(11, 16), array(30,  2)), //
 539  	 	 array(array( 8,  4), array( 8, 13), array( 7, 22), array(22, 13)), // 25
 540  	 	 array(array(10,  2), array(19,  4), array(28,  6), array(33,  4)), //
 541  	 	 array(array( 8,  4), array(22,  3), array( 8, 26), array(12, 28)), //
 542  	 	 array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), //
 543  	 	 array(array( 7,  7), array(21,  7), array( 1, 37), array(19, 26)), //
 544  	 	 array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30
 545  	 	 array(array(13,  3), array( 2, 29), array(42,  1), array(23, 28)), //
 546  	 	 array(array(17,  0), array(10, 23), array(10, 35), array(19, 35)), //
 547  	 	 array(array(17,  1), array(14, 21), array(29, 19), array(11, 46)), //
 548  	 	 array(array(13,  6), array(14, 23), array(44,  7), array(59,  1)), //
 549  	 	 array(array(12,  7), array(12, 26), array(39, 14), array(22, 41)), // 35
 550  	 	 array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), //
 551  	 	 array(array(17,  4), array(29, 14), array(49, 10), array(24, 46)), //
 552  	 	 array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), //
 553  	 	 array(array(20,  4), array(40,  7), array(43, 22), array(10, 67)), //
 554  	 	 array(array(19,  6), array(18, 31), array(34, 34), array(20, 61))  // 40
 555  	 );
 556  
 557  	 /**
 558  	  * Array Positions of alignment patterns.
 559  	  * 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.
 560  	  * See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
 561  	  * @protected
 562  	  */
 563  	 protected $alignmentPattern = array(
 564  	 	 array( 0,  0),
 565  	 	 array( 0,  0), array(18,  0), array(22,  0), array(26,  0), array(30,  0), //  1- 5
 566  	 	 array(34,  0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), //  6-10
 567  	 	 array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15
 568  	 	 array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20
 569  	 	 array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25
 570  	 	 array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30
 571  	 	 array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35
 572  	 	 array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58)  // 35-40
 573  	 );
 574  
 575  	 /**
 576  	  * Array Version information pattern (BCH coded).
 577  	  * See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
 578  	  * size: [QRSPEC_VERSION_MAX - 6]
 579  	  * @protected
 580  	  */
 581  	 protected $versionPattern = array(
 582  	 	 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, //
 583  	 	 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, //
 584  	 	 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, //
 585  	 	 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, //
 586  	 	 0x27541, 0x28c69
 587  	 );
 588  
 589  	 /**
 590  	  * Array Format information
 591  	  * @protected
 592  	  */
 593  	 protected $formatInfo = array(
 594  	 	 array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), //
 595  	 	 array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), //
 596  	 	 array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), //
 597  	 	 array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)  //
 598  	 );
 599  
 600  
 601  	 // -------------------------------------------------
 602  	 // -------------------------------------------------
 603  
 604  
 605  	 /**
 606  	  * This is the class constructor.
 607  	  * Creates a QRcode object
 608  	  * @param string $code code to represent using QRcode
 609  	  * @param string $eclevel error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul>
 610  	  * @public
 611  	  * @since 1.0.000
 612  	  */
 613  	public function __construct($code, $eclevel = 'L') {
 614  	 	 $barcode_array = array();
 615  	 	 if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
 616  	 	 	 return false;
 617  	 	 }
 618  	 	 // set error correction level
 619  	 	 $this->level = array_search($eclevel, array('L', 'M', 'Q', 'H'));
 620  	 	 if ($this->level === false) {
 621  	 	 	 $this->level = QR_ECLEVEL_L;
 622  	 	 }
 623  	 	 if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) {
 624  	 	 	 return false;
 625  	 	 }
 626  	 	 if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) {
 627  	 	 	 return false;
 628  	 	 }
 629  	 	 $this->items = array();
 630  	 	 $this->encodeString($code);
 631  	 	 if (is_null($this->data)) {
 632  	 	 	 return false;
 633  	 	 }
 634  	 	 $qrTab = $this->binarize($this->data);
 635  	 	 $size = count($qrTab);
 636  	 	 $barcode_array['num_rows'] = $size;
 637  	 	 $barcode_array['num_cols'] = $size;
 638  	 	 $barcode_array['bcode'] = array();
 639  	 	 foreach ($qrTab as $line) {
 640  	 	 	 $arrAdd = array();
 641  	 	 	 foreach (str_split($line) as $char) {
 642  	 	 	 	 $arrAdd[] = ($char=='1')?1:0;
 643  	 	 	 }
 644  	 	 	 $barcode_array['bcode'][] = $arrAdd;
 645  	 	 }
 646  	 	 $this->barcode_array = $barcode_array;
 647  	 }
 648  
 649  	 /**
 650  	  * Returns a barcode array which is readable by TCPDF
 651  	  * @return array barcode array readable by TCPDF;
 652  	  * @public
 653  	  */
 654  	public function getBarcodeArray() {
 655  	 	 return $this->barcode_array;
 656  	 }
 657  
 658  	 /**
 659  	  * Convert the frame in binary form
 660  	  * @param array $frame array to binarize
 661  	  * @return array frame in binary form
 662  	  */
 663  	protected function binarize($frame) {
 664  	 	 $len = count($frame);
 665  	 	 // the frame is square (width = height)
 666  	 	 foreach ($frame as &$frameLine) {
 667  	 	 	 for ($i=0; $i<$len; $i++) {
 668  	 	 	 	 $frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0';
 669  	 	 	 }
 670  	 	 }
 671  	 	 return $frame;
 672  	 }
 673  
 674  	 /**
 675  	  * Encode the input string to QR code
 676  	  * @param string $string input string to encode
 677  	  */
 678  	protected function encodeString($string) {
 679  	 	 $this->dataStr = $string;
 680  	 	 if (!$this->casesensitive) {
 681  	 	 	 $this->toUpper();
 682  	 	 }
 683  	 	 $ret = $this->splitString();
 684  	 	 if ($ret < 0) {
 685  	 	 	 return NULL;
 686  	 	 }
 687  	 	 $this->encodeMask(-1);
 688  	 }
 689  
 690  	 /**
 691  	  * Encode mask
 692  	  * @param int $mask masking mode
 693  	  */
 694  	protected function encodeMask($mask) {
 695  	 	 $spec = array(0, 0, 0, 0, 0);
 696  	 	 $this->datacode = $this->getByteStream($this->items);
 697  
 698  	 	 if (is_null($this->datacode)) {
 699  	 	 	 return NULL;
 700  	 	 }
 701  	 	 $spec = $this->getEccSpec($this->version, $this->level, $spec);
 702  	 	 $this->b1 = $this->rsBlockNum1($spec);
 703  	 	 $this->dataLength = $this->rsDataLength($spec);
 704  	 	 $this->eccLength = $this->rsEccLength($spec);
 705  	 	 $this->ecccode = array_fill(0, $this->eccLength, 0);
 706  	 	 $this->blocks = $this->rsBlockNum($spec);
 707  	 	 $ret = $this->init($spec);
 708  	 	 if ($ret < 0) {
 709  	 	 	 return NULL;
 710  	 	 }
 711  	 	 $this->count = 0;
 712  	 	 $this->width = $this->getWidth($this->version);
 713  	 	 $this->frame = $this->newFrame($this->version);
 714  	 	 $this->x = $this->width - 1;
 715  	 	 $this->y = $this->width - 1;
 716  	 	 $this->dir = -1;
 717  	 	 $this->bit = -1;
 718  	 	 // inteleaved data and ecc codes
 719  	 	 for ($i=0; $i < ($this->dataLength + $this->eccLength); $i++) {
 720  	 	 	 $code = $this->getCode();
 721  	 	 	 $bit = 0x80;
 722  	 	 	 for ($j=0; $j<8; $j++) {
 723  	 	 	 	 $addr = $this->getNextPosition();
 724  	 	 	 	 $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0));
 725  	 	 	 	 $bit = $bit >> 1;
 726  	 	 	 }
 727  	 	 }
 728  	 	 // remainder bits
 729  	 	 $j = $this->getRemainder($this->version);
 730  	 	 for ($i=0; $i<$j; $i++) {
 731  	 	 	 $addr = $this->getNextPosition();
 732  	 	 	 $this->setFrameAt($addr, 0x02);
 733  	 	 }
 734  	 	 // masking
 735  	 	 $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
 736  	 	 if ($mask < 0) {
 737  	 	 	 if (QR_FIND_BEST_MASK) {
 738  	 	 	 	 $masked = $this->mask($this->width, $this->frame, $this->level);
 739  	 	 	 } else {
 740  	 	 	 	 $masked = $this->makeMask($this->width, $this->frame, (intval(QR_DEFAULT_MASK) % 8), $this->level);
 741  	 	 	 }
 742  	 	 } else {
 743  	 	 	 $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
 744  	 	 }
 745  	 	 if ($masked == NULL) {
 746  	 	 	 return NULL;
 747  	 	 }
 748  	 	 $this->data = $masked;
 749  	 }
 750  
 751  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
 752  
 753  	 // FrameFiller
 754  
 755  	 /**
 756  	  * Set frame value at specified position
 757  	  * @param array $at x,y position
 758  	  * @param int $val value of the character to set
 759  	  */
 760  	protected function setFrameAt($at, $val) {
 761  	 	 $this->frame[$at['y']][$at['x']] = chr($val);
 762  	 }
 763  
 764  	 /**
 765  	  * Get frame value at specified position
 766  	  * @param array $at x,y position
 767  	  * @return value at specified position
 768  	  */
 769  	protected function getFrameAt($at) {
 770  	 	 return ord($this->frame[$at['y']][$at['x']]);
 771  	 }
 772  
 773  	 /**
 774  	  * Return the next frame position
 775  	  * @return array of x,y coordinates
 776  	  */
 777  	protected function getNextPosition() {
 778  	 	 do {
 779  	 	 	 if ($this->bit == -1) {
 780  	 	 	 	 $this->bit = 0;
 781  	 	 	 	 return array('x'=>$this->x, 'y'=>$this->y);
 782  	 	 	 }
 783  	 	 	 $x = $this->x;
 784  	 	 	 $y = $this->y;
 785  	 	 	 $w = $this->width;
 786  	 	 	 if ($this->bit == 0) {
 787  	 	 	 	 $x--;
 788  	 	 	 	 $this->bit++;
 789  	 	 	 } else {
 790  	 	 	 	 $x++;
 791  	 	 	 	 $y += $this->dir;
 792  	 	 	 	 $this->bit--;
 793  	 	 	 }
 794  	 	 	 if ($this->dir < 0) {
 795  	 	 	 	 if ($y < 0) {
 796  	 	 	 	 	 $y = 0;
 797  	 	 	 	 	 $x -= 2;
 798  	 	 	 	 	 $this->dir = 1;
 799  	 	 	 	 	 if ($x == 6) {
 800  	 	 	 	 	 	 $x--;
 801  	 	 	 	 	 	 $y = 9;
 802  	 	 	 	 	 }
 803  	 	 	 	 }
 804  	 	 	 } else {
 805  	 	 	 	 if ($y == $w) {
 806  	 	 	 	 	 $y = $w - 1;
 807  	 	 	 	 	 $x -= 2;
 808  	 	 	 	 	 $this->dir = -1;
 809  	 	 	 	 	 if ($x == 6) {
 810  	 	 	 	 	 	 $x--;
 811  	 	 	 	 	 	 $y -= 8;
 812  	 	 	 	 	 }
 813  	 	 	 	 }
 814  	 	 	 }
 815  	 	 	 if (($x < 0) OR ($y < 0)) {
 816  	 	 	 	 return NULL;
 817  	 	 	 }
 818  	 	 	 $this->x = $x;
 819  	 	 	 $this->y = $y;
 820  	 	 } while(ord($this->frame[$y][$x]) & 0x80);
 821  	 	 return array('x'=>$x, 'y'=>$y);
 822  	 }
 823  
 824  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
 825  
 826  	 // QRrawcode
 827  
 828  	 /**
 829  	  * Initialize code.
 830  	  * @param array $spec array of ECC specification
 831  	  * @return int 0 in case of success, -1 in case of error
 832  	  */
 833  	protected function init($spec) {
 834  	 	 $dl = $this->rsDataCodes1($spec);
 835  	 	 $el = $this->rsEccCodes1($spec);
 836  	 	 $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
 837  	 	 $blockNo = 0;
 838  	 	 $dataPos = 0;
 839  	 	 $eccPos = 0;
 840  	 	 $endfor = $this->rsBlockNum1($spec);
 841  	 	 for ($i=0; $i < $endfor; ++$i) {
 842  	 	 	 $ecc = array_slice($this->ecccode, $eccPos);
 843  	 	 	 $this->rsblocks[$blockNo] = array();
 844  	 	 	 $this->rsblocks[$blockNo]['dataLength'] = $dl;
 845  	 	 	 $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
 846  	 	 	 $this->rsblocks[$blockNo]['eccLength'] = $el;
 847  	 	 	 $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
 848  	 	 	 $this->rsblocks[$blockNo]['ecc'] = $ecc;
 849  	 	 	 $this->ecccode = array_merge(array_slice($this->ecccode,0, $eccPos), $ecc);
 850  	 	 	 $dataPos += $dl;
 851  	 	 	 $eccPos += $el;
 852  	 	 	 $blockNo++;
 853  	 	 }
 854  	 	 if ($this->rsBlockNum2($spec) == 0) {
 855  	 	 	 return 0;
 856  	 	 }
 857  	 	 $dl = $this->rsDataCodes2($spec);
 858  	 	 $el = $this->rsEccCodes2($spec);
 859  	 	 $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
 860  	 	 if ($rs == NULL) {
 861  	 	 	 return -1;
 862  	 	 }
 863  	 	 $endfor = $this->rsBlockNum2($spec);
 864  	 	 for ($i=0; $i < $endfor; ++$i) {
 865  	 	 	 $ecc = array_slice($this->ecccode, $eccPos);
 866  	 	 	 $this->rsblocks[$blockNo] = array();
 867  	 	 	 $this->rsblocks[$blockNo]['dataLength'] = $dl;
 868  	 	 	 $this->rsblocks[$blockNo]['data'] = array_slice($this->datacode, $dataPos);
 869  	 	 	 $this->rsblocks[$blockNo]['eccLength'] = $el;
 870  	 	 	 $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
 871  	 	 	 $this->rsblocks[$blockNo]['ecc'] = $ecc;
 872  	 	 	 $this->ecccode = array_merge(array_slice($this->ecccode, 0, $eccPos), $ecc);
 873  	 	 	 $dataPos += $dl;
 874  	 	 	 $eccPos += $el;
 875  	 	 	 $blockNo++;
 876  	 	 }
 877  	 	 return 0;
 878  	 }
 879  
 880  	 /**
 881  	  * Return Reed-Solomon block code.
 882  	  * @return array rsblocks
 883  	  */
 884  	protected function getCode() {
 885  	 	 if ($this->count < $this->dataLength) {
 886  	 	 	 $row = $this->count % $this->blocks;
 887  	 	 	 $col = (int)($this->count / $this->blocks);
 888  	 	 	 if ($col >= $this->rsblocks[0]['dataLength']) {
 889  	 	 	 	 $row += $this->b1;
 890  	 	 	 }
 891  	 	 	 $ret = $this->rsblocks[$row]['data'][$col];
 892  	 	 } elseif ($this->count < $this->dataLength + $this->eccLength) {
 893  	 	 	 $row = ($this->count - $this->dataLength) % $this->blocks;
 894  	 	 	 $col = (int)(($this->count - $this->dataLength) / $this->blocks);
 895  	 	 	 $ret = $this->rsblocks[$row]['ecc'][$col];
 896  	 	 } else {
 897  	 	 	 return 0;
 898  	 	 }
 899  	 	 $this->count++;
 900  	 	 return $ret;
 901  	 }
 902  
 903  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
 904  
 905  	 // QRmask
 906  
 907  	 /**
 908  	  * Write Format Information on frame and returns the number of black bits
 909  	  * @param int $width frame width
 910  	  * @param array $frame frame
 911  	  * @param array $mask masking mode
 912  	  * @param int $level error correction level
 913  	  * @return int blacks
 914  	  */
 915  	 protected function writeFormatInformation($width, &$frame, $mask, $level) {
 916  	 	 $blacks = 0;
 917  	 	 $format =  $this->getFormatInfo($mask, $level);
 918  	 	 for ($i=0; $i<8; ++$i) {
 919  	 	 	 if ($format & 1) {
 920  	 	 	 	 $blacks += 2;
 921  	 	 	 	 $v = 0x85;
 922  	 	 	 } else {
 923  	 	 	 	 $v = 0x84;
 924  	 	 	 }
 925  	 	 	 $frame[8][$width - 1 - $i] = chr($v);
 926  	 	 	 if ($i < 6) {
 927  	 	 	 	 $frame[$i][8] = chr($v);
 928  	 	 	 } else {
 929  	 	 	 	 $frame[$i + 1][8] = chr($v);
 930  	 	 	 }
 931  	 	 	 $format = $format >> 1;
 932  	 	 }
 933  	 	 for ($i=0; $i<7; ++$i) {
 934  	 	 if ($format & 1) {
 935  	 	 	 $blacks += 2;
 936  	 	 	 $v = 0x85;
 937  	 	 } else {
 938  	 	 	 $v = 0x84;
 939  	 	 }
 940  	 	 $frame[$width - 7 + $i][8] = chr($v);
 941  	 	 if ($i == 0) {
 942  	 	 	 $frame[8][7] = chr($v);
 943  	 	 } else {
 944  	 	 	 $frame[8][6 - $i] = chr($v);
 945  	 	 }
 946  	 	 $format = $format >> 1;
 947  	 	 }
 948  	 	 return $blacks;
 949  	 }
 950  
 951  	 /**
 952  	  * mask0
 953  	  * @param int $x X position
 954  	  * @param int $y Y position
 955  	  * @return int mask
 956  	  */
 957  	 protected function mask0($x, $y) {
 958  	 	 return ($x + $y) & 1;
 959  	 }
 960  
 961  	 /**
 962  	  * mask1
 963  	  * @param int $x X position
 964  	  * @param int $y Y position
 965  	  * @return int mask
 966  	  */
 967  	 protected function mask1($x, $y) {
 968  	 	 return ($y & 1);
 969  	 }
 970  
 971  	 /**
 972  	  * mask2
 973  	  * @param int $x X position
 974  	  * @param int $y Y position
 975  	  * @return int mask
 976  	  */
 977  	 protected function mask2($x, $y) {
 978  	 	 return ($x % 3);
 979  	 }
 980  
 981  	 /**
 982  	  * mask3
 983  	  * @param int $x X position
 984  	  * @param int $y Y position
 985  	  * @return int mask
 986  	  */
 987  	 protected function mask3($x, $y) {
 988  	 	 return ($x + $y) % 3;
 989  	 }
 990  
 991  	 /**
 992  	  * mask4
 993  	  * @param int $x X position
 994  	  * @param int $y Y position
 995  	  * @return int mask
 996  	  */
 997  	 protected function mask4($x, $y) {
 998  	 	 return (((int)($y / 2)) + ((int)($x / 3))) & 1;
 999  	 }
1000  
1001  	 /**
1002  	  * mask5
1003  	  * @param int $x X position
1004  	  * @param int $y Y position
1005  	  * @return int mask
1006  	  */
1007  	 protected function mask5($x, $y) {
1008  	 	 return (($x * $y) & 1) + ($x * $y) % 3;
1009  	 }
1010  
1011  	 /**
1012  	  * mask6
1013  	  * @param int $x X position
1014  	  * @param int $y Y position
1015  	  * @return int mask
1016  	  */
1017  	 protected function mask6($x, $y) {
1018  	 	 return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
1019  	 }
1020  
1021  	 /**
1022  	  * mask7
1023  	  * @param int $x X position
1024  	  * @param int $y Y position
1025  	  * @return int mask
1026  	  */
1027  	 protected function mask7($x, $y) {
1028  	 	 return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
1029  	 }
1030  
1031  	 /**
1032  	  * Return bitmask
1033  	  * @param int $maskNo mask number
1034  	  * @param int $width width
1035  	  * @param array $frame frame
1036  	  * @return array bitmask
1037  	  */
1038  	protected function generateMaskNo($maskNo, $width, $frame) {
1039  	 	 $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
1040  	 	 for ($y=0; $y<$width; ++$y) {
1041  	 	 	 for ($x=0; $x<$width; ++$x) {
1042  	 	 	 	 if (ord($frame[$y][$x]) & 0x80) {
1043  	 	 	 	 	 $bitMask[$y][$x] = 0;
1044  	 	 	 	 } else {
1045  	 	 	 	 	 $maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
1046  	 	 	 	 	 $bitMask[$y][$x] = ($maskFunc == 0)?1:0;
1047  	 	 	 	 }
1048  	 	 	 }
1049  	 	 }
1050  	 	 return $bitMask;
1051  	 }
1052  
1053  	 /**
1054  	  * makeMaskNo
1055  	  * @param int $maskNo
1056  	  * @param int $width
1057  	  * @param int $s
1058  	  * @param int $d
1059  	  * @param boolean $maskGenOnly
1060  	  * @return int b
1061  	  */
1062  	 protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) {
1063  	 	 $b = 0;
1064  	 	 $bitMask = array();
1065  	 	 $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d);
1066  	 	 if ($maskGenOnly) {
1067  	 	 	 return;
1068  	 	 }
1069  	 	 $d = $s;
1070  	 	 for ($y=0; $y<$width; ++$y) {
1071  	 	 	 for ($x=0; $x<$width; ++$x) {
1072  	 	 	 	 if ($bitMask[$y][$x] == 1) {
1073  	 	 	 	 	 $d[$y][$x] = chr(ord($s[$y][$x]) ^ ((int)($bitMask[$y][$x])));
1074  	 	 	 	 }
1075  	 	 	 	 $b += (int)(ord($d[$y][$x]) & 1);
1076  	 	 	 }
1077  	 	 }
1078  	 	 return $b;
1079  	 }
1080  
1081  	 /**
1082  	  * makeMask
1083  	  * @param int $width
1084  	  * @param array $frame
1085  	  * @param int $maskNo
1086  	  * @param int $level
1087  	  * @return array mask
1088  	  */
1089  	 protected function makeMask($width, $frame, $maskNo, $level) {
1090  	 	 $masked = array_fill(0, $width, str_repeat("\0", $width));
1091  	 	 $this->makeMaskNo($maskNo, $width, $frame, $masked);
1092  	 	 $this->writeFormatInformation($width, $masked, $maskNo, $level);
1093  	 	 return $masked;
1094  	 }
1095  
1096  	 /**
1097  	  * calcN1N3
1098  	  * @param int $length
1099  	  * @return int demerit
1100  	  */
1101  	 protected function calcN1N3($length) {
1102  	 	 $demerit = 0;
1103  	 	 for ($i=0; $i<$length; ++$i) {
1104  	 	 	 if ($this->runLength[$i] >= 5) {
1105  	 	 	 	 $demerit += (N1 + ($this->runLength[$i] - 5));
1106  	 	 	 }
1107  	 	 	 if ($i & 1) {
1108  	 	 	 	 if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) {
1109  	 	 	 	 	 $fact = (int)($this->runLength[$i] / 3);
1110  	 	 	 	 	 if (($this->runLength[$i-2] == $fact)
1111  	 	 	 	 	 	 AND ($this->runLength[$i-1] == $fact)
1112  	 	 	 	 	 	 AND ($this->runLength[$i+1] == $fact)
1113  	 	 	 	 	 	 AND ($this->runLength[$i+2] == $fact)) {
1114  	 	 	 	 	 	 if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) {
1115  	 	 	 	 	 	 	 $demerit += N3;
1116  	 	 	 	 	 	 } elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) {
1117  	 	 	 	 	 	 	 $demerit += N3;
1118  	 	 	 	 	 	 }
1119  	 	 	 	 	 }
1120  	 	 	 	 }
1121  	 	 	 }
1122  	 	 }
1123  	 	 return $demerit;
1124  	 }
1125  
1126  	 /**
1127  	  * evaluateSymbol
1128  	  * @param int $width
1129  	  * @param array $frame
1130  	  * @return int demerit
1131  	  */
1132  	 protected function evaluateSymbol($width, $frame) {
1133  	 	 $head = 0;
1134  	 	 $demerit = 0;
1135  	 	 for ($y=0; $y<$width; ++$y) {
1136  	 	 	 $head = 0;
1137  	 	 	 $this->runLength[0] = 1;
1138  	 	 	 $frameY = $frame[$y];
1139  	 	 	 if ($y > 0) {
1140  	 	 	 	 $frameYM = $frame[$y-1];
1141  	 	 	 }
1142  	 	 	 for ($x=0; $x<$width; ++$x) {
1143  	 	 	 	 if (($x > 0) AND ($y > 0)) {
1144  	 	 	 	 	 $b22 = ord($frameY[$x]) & ord($frameY[$x-1]) & ord($frameYM[$x]) & ord($frameYM[$x-1]);
1145  	 	 	 	 	 $w22 = ord($frameY[$x]) | ord($frameY[$x-1]) | ord($frameYM[$x]) | ord($frameYM[$x-1]);
1146  	 	 	 	 	 if (($b22 | ($w22 ^ 1)) & 1) {
1147  	 	 	 	 	 	 $demerit += N2;
1148  	 	 	 	 	 }
1149  	 	 	 	 }
1150  	 	 	 	 if (($x == 0) AND (ord($frameY[$x]) & 1)) {
1151  	 	 	 	 	 $this->runLength[0] = -1;
1152  	 	 	 	 	 $head = 1;
1153  	 	 	 	 	 $this->runLength[$head] = 1;
1154  	 	 	 	 } elseif ($x > 0) {
1155  	 	 	 	 	 if ((ord($frameY[$x]) ^ ord($frameY[$x-1])) & 1) {
1156  	 	 	 	 	 	 $head++;
1157  	 	 	 	 	 	 $this->runLength[$head] = 1;
1158  	 	 	 	 	 } else {
1159  	 	 	 	 	 	 $this->runLength[$head]++;
1160  	 	 	 	 	 }
1161  	 	 	 	 }
1162  	 	 	 }
1163  	 	 	 $demerit += $this->calcN1N3($head+1);
1164  	 	 }
1165  	 	 for ($x=0; $x<$width; ++$x) {
1166  	 	 	 $head = 0;
1167  	 	 	 $this->runLength[0] = 1;
1168  	 	 	 for ($y=0; $y<$width; ++$y) {
1169  	 	 	 	 if (($y == 0) AND (ord($frame[$y][$x]) & 1)) {
1170  	 	 	 	 	 $this->runLength[0] = -1;
1171  	 	 	 	 	 $head = 1;
1172  	 	 	 	 	 $this->runLength[$head] = 1;
1173  	 	 	 	 } elseif ($y > 0) {
1174  	 	 	 	 	 if ((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) {
1175  	 	 	 	 	 	 $head++;
1176  	 	 	 	 	 	 $this->runLength[$head] = 1;
1177  	 	 	 	 	 } else {
1178  	 	 	 	 	 	 $this->runLength[$head]++;
1179  	 	 	 	 	 }
1180  	 	 	 	 }
1181  	 	 	 }
1182  	 	 	 $demerit += $this->calcN1N3($head+1);
1183  	 	 }
1184  	 	 return $demerit;
1185  	 }
1186  
1187  	 /**
1188  	  * mask
1189  	  * @param int $width
1190  	  * @param array $frame
1191  	  * @param int $level
1192  	  * @return array best mask
1193  	  */
1194  	 protected function mask($width, $frame, $level) {
1195  	 	 $minDemerit = PHP_INT_MAX;
1196  	 	 $bestMaskNum = 0;
1197  	 	 $bestMask = array();
1198  	 	 $checked_masks = array(0, 1, 2, 3, 4, 5, 6, 7);
1199  	 	 if (QR_FIND_FROM_RANDOM !== false) {
1200  	 	 	 $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9);
1201  	 	 	 for ($i = 0; $i <  $howManuOut; ++$i) {
1202  	 	 	 	 $remPos = rand (0, count($checked_masks)-1);
1203  	 	 	 	 unset($checked_masks[$remPos]);
1204  	 	 	 	 $checked_masks = array_values($checked_masks);
1205  	 	 	 }
1206  	 	 }
1207  	 	 $bestMask = $frame;
1208  	 	 foreach ($checked_masks as $i) {
1209  	 	 	 $mask = array_fill(0, $width, str_repeat("\0", $width));
1210  	 	 	 $demerit = 0;
1211  	 	 	 $blacks = 0;
1212  	 	 	 $blacks  = $this->makeMaskNo($i, $width, $frame, $mask);
1213  	 	 	 $blacks += $this->writeFormatInformation($width, $mask, $i, $level);
1214  	 	 	 $blacks  = (int)(100 * $blacks / ($width * $width));
1215  	 	 	 $demerit = (int)((int)(abs($blacks - 50) / 5) * N4);
1216  	 	 	 $demerit += $this->evaluateSymbol($width, $mask);
1217  	 	 	 if ($demerit < $minDemerit) {
1218  	 	 	 	 $minDemerit = $demerit;
1219  	 	 	 	 $bestMask = $mask;
1220  	 	 	 	 $bestMaskNum = $i;
1221  	 	 	 }
1222  	 	 }
1223  	 	 return $bestMask;
1224  	 }
1225  
1226  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
1227  
1228  	 // QRsplit
1229  
1230  	 /**
1231  	  * Return true if the character at specified position is a number
1232  	  * @param string $str string
1233  	  * @param int $pos characted position
1234  	  * @return boolean true of false
1235  	  */
1236  	 protected function isdigitat($str, $pos) {
1237  	 	 if ($pos >= strlen($str)) {
1238  	 	 	 return false;
1239  	 	 }
1240  	 	 return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9')));
1241  	 }
1242  
1243  	 /**
1244  	  * Return true if the character at specified position is an alphanumeric character
1245  	  * @param string $str string
1246  	  * @param int $pos characted position
1247  	  * @return boolean true of false
1248  	  */
1249  	 protected function isalnumat($str, $pos) {
1250  	 	 if ($pos >= strlen($str)) {
1251  	 	 	 return false;
1252  	 	 }
1253  	 	 return ($this->lookAnTable(ord($str[$pos])) >= 0);
1254  	 }
1255  
1256  	 /**
1257  	  * identifyMode
1258  	  * @param int $pos
1259  	  * @return int mode
1260  	  */
1261  	 protected function identifyMode($pos) {
1262  	 	 if ($pos >= strlen($this->dataStr)) {
1263  	 	 	 return QR_MODE_NL;
1264  	 	 }
1265  	 	 $c = $this->dataStr[$pos];
1266  	 	 if ($this->isdigitat($this->dataStr, $pos)) {
1267  	 	 	 return QR_MODE_NM;
1268  	 	 } elseif ($this->isalnumat($this->dataStr, $pos)) {
1269  	 	 	 return QR_MODE_AN;
1270  	 	 } elseif ($this->hint == QR_MODE_KJ) {
1271  	 	 	 if ($pos+1 < strlen($this->dataStr)) {
1272  	 	 	 	 $d = $this->dataStr[$pos+1];
1273  	 	 	 	 $word = (ord($c) << 8) | ord($d);
1274  	 	 	 	 if (($word >= 0x8140 && $word <= 0x9ffc) OR ($word >= 0xe040 && $word <= 0xebbf)) {
1275  	 	 	 	 	 return QR_MODE_KJ;
1276  	 	 	 	 }
1277  	 	 	 }
1278  	 	 }
1279  	 	 return QR_MODE_8B;
1280  	 }
1281  
1282  	 /**
1283  	  * eatNum
1284  	  * @return int run
1285  	  */
1286  	 protected function eatNum() {
1287  	 	 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1288  	 	 $p = 0;
1289  	 	 while($this->isdigitat($this->dataStr, $p)) {
1290  	 	 	 $p++;
1291  	 	 }
1292  	 	 $run = $p;
1293  	 	 $mode = $this->identifyMode($p);
1294  	 	 if ($mode == QR_MODE_8B) {
1295  	 	 	 $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1296  	 	 	 + $this->estimateBitsMode8(1)         // + 4 + l8
1297  	 	 	 - $this->estimateBitsMode8($run + 1); // - 4 - l8
1298  	 	 	 if ($dif > 0) {
1299  	 	 	 	 return $this->eat8();
1300  	 	 	 }
1301  	 	 }
1302  	 	 if ($mode == QR_MODE_AN) {
1303  	 	 	 $dif = $this->estimateBitsModeNum($run) + 4 + $ln
1304  	 	 	 + $this->estimateBitsModeAn(1)        // + 4 + la
1305  	 	 	 - $this->estimateBitsModeAn($run + 1);// - 4 - la
1306  	 	 	 if ($dif > 0) {
1307  	 	 	 	 return $this->eatAn();
1308  	 	 	 }
1309  	 	 }
1310  	 	 $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, str_split($this->dataStr));
1311  	 	 return $run;
1312  	 }
1313  
1314  	 /**
1315  	  * eatAn
1316  	  * @return int run
1317  	  */
1318  	 protected function eatAn() {
1319  	 	 $la = $this->lengthIndicator(QR_MODE_AN,  $this->version);
1320  	 	 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1321  	 	 $p =1 ;
1322  	 	 while($this->isalnumat($this->dataStr, $p)) {
1323  	 	 	 if ($this->isdigitat($this->dataStr, $p)) {
1324  	 	 	 	 $q = $p;
1325  	 	 	 	 while($this->isdigitat($this->dataStr, $q)) {
1326  	 	 	 	 	 $q++;
1327  	 	 	 	 }
1328  	 	 	 	 $dif = $this->estimateBitsModeAn($p) // + 4 + la
1329  	 	 	 	 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1330  	 	 	 	 - $this->estimateBitsModeAn($q); // - 4 - la
1331  	 	 	 	 if ($dif < 0) {
1332  	 	 	 	 	 break;
1333  	 	 	 	 } else {
1334  	 	 	 	 	 $p = $q;
1335  	 	 	 	 }
1336  	 	 	 } else {
1337  	 	 	 	 $p++;
1338  	 	 	 }
1339  	 	 }
1340  	 	 $run = $p;
1341  	 	 if (!$this->isalnumat($this->dataStr, $p)) {
1342  	 	 	 $dif = $this->estimateBitsModeAn($run) + 4 + $la
1343  	 	 	 + $this->estimateBitsMode8(1) // + 4 + l8
1344  	 	 	 - $this->estimateBitsMode8($run + 1); // - 4 - l8
1345  	 	 	 if ($dif > 0) {
1346  	 	 	 	 return $this->eat8();
1347  	 	 	 }
1348  	 	 }
1349  	 	 $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, str_split($this->dataStr));
1350  	 	 return $run;
1351  	 }
1352  
1353  	 /**
1354  	  * eatKanji
1355  	  * @return int run
1356  	  */
1357  	 protected function eatKanji() {
1358  	 	 $p = 0;
1359  	 	 while($this->identifyMode($p) == QR_MODE_KJ) {
1360  	 	 	 $p += 2;
1361  	 	 }
1362  	 	 $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, str_split($this->dataStr));
1363  	 	 $run = $p;
1364  	 	 return $run;
1365  	 }
1366  
1367  	 /**
1368  	  * eat8
1369  	  * @return int run
1370  	  */
1371  	 protected function eat8() {
1372  	 	 $la = $this->lengthIndicator(QR_MODE_AN, $this->version);
1373  	 	 $ln = $this->lengthIndicator(QR_MODE_NM, $this->version);
1374  	 	 $p = 1;
1375  	 	 $dataStrLen = strlen($this->dataStr);
1376  	 	 while($p < $dataStrLen) {
1377  	 	 	 $mode = $this->identifyMode($p);
1378  	 	 	 if ($mode == QR_MODE_KJ) {
1379  	 	 	 	 break;
1380  	 	 	 }
1381  	 	 	 if ($mode == QR_MODE_NM) {
1382  	 	 	 	 $q = $p;
1383  	 	 	 	 while($this->isdigitat($this->dataStr, $q)) {
1384  	 	 	 	 	 $q++;
1385  	 	 	 	 }
1386  	 	 	 	 $dif = $this->estimateBitsMode8($p) // + 4 + l8
1387  	 	 	 	 + $this->estimateBitsModeNum($q - $p) + 4 + $ln
1388  	 	 	 	 - $this->estimateBitsMode8($q); // - 4 - l8
1389  	 	 	 	 if ($dif < 0) {
1390  	 	 	 	 	 break;
1391  	 	 	 	 } else {
1392  	 	 	 	 	 $p = $q;
1393  	 	 	 	 }
1394  	 	 	 } elseif ($mode == QR_MODE_AN) {
1395  	 	 	 	 $q = $p;
1396  	 	 	 	 while($this->isalnumat($this->dataStr, $q)) {
1397  	 	 	 	 	 $q++;
1398  	 	 	 	 }
1399  	 	 	 	 $dif = $this->estimateBitsMode8($p)  // + 4 + l8
1400  	 	 	 	 + $this->estimateBitsModeAn($q - $p) + 4 + $la
1401  	 	 	 	 - $this->estimateBitsMode8($q); // - 4 - l8
1402  	 	 	 	 if ($dif < 0) {
1403  	 	 	 	 	 break;
1404  	 	 	 	 } else {
1405  	 	 	 	 	 $p = $q;
1406  	 	 	 	 }
1407  	 	 	 } else {
1408  	 	 	 	 $p++;
1409  	 	 	 }
1410  	 	 }
1411  	 	 $run = $p;
1412  	 	 $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, str_split($this->dataStr));
1413  	 	 return $run;
1414  	 }
1415  
1416  	 /**
1417  	  * splitString
1418  	  * @return int
1419  	  */
1420  	 protected function splitString() {
1421  	 	 while (strlen($this->dataStr) > 0) {
1422  	 	 	 $mode = $this->identifyMode(0);
1423  	 	 	 switch ($mode) {
1424  	 	 	 	 case QR_MODE_NM: {
1425  	 	 	 	 	 $length = $this->eatNum();
1426  	 	 	 	 	 break;
1427  	 	 	 	 }
1428  	 	 	 	 case QR_MODE_AN: {
1429  	 	 	 	 	 $length = $this->eatAn();
1430  	 	 	 	 	 break;
1431  	 	 	 	 }
1432  	 	 	 	 case QR_MODE_KJ: {
1433  	 	 	 	 	 if ($this->hint == QR_MODE_KJ) {
1434  	 	 	 	 	 	 $length = $this->eatKanji();
1435  	 	 	 	 	 } else {
1436  	 	 	 	 	 	 $length = $this->eat8();
1437  	 	 	 	 	 }
1438  	 	 	 	 	 break;
1439  	 	 	 	 }
1440  	 	 	 	 default: {
1441  	 	 	 	 	 $length = $this->eat8();
1442  	 	 	 	 	 break;
1443  	 	 	 	 }
1444  	 	 	 }
1445  	 	 	 if ($length == 0) {
1446  	 	 	 	 return 0;
1447  	 	 	 }
1448  	 	 	 if ($length < 0) {
1449  	 	 	 	 return -1;
1450  	 	 	 }
1451  	 	 	 $this->dataStr = substr($this->dataStr, $length);
1452  	 	 }
1453  	 	 return 0;
1454  	 }
1455  
1456  	 /**
1457  	  * toUpper
1458  	  */
1459  	 protected function toUpper() {
1460  	 	 $stringLen = strlen($this->dataStr);
1461  	 	 $p = 0;
1462  	 	 while ($p < $stringLen) {
1463  	 	 	 $mode = $this->identifyMode(substr($this->dataStr, $p), $this->hint);
1464  	 	 	 if ($mode == QR_MODE_KJ) {
1465  	 	 	 	 $p += 2;
1466  	 	 	 } else {
1467  	 	 	 	 if ((ord($this->dataStr[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
1468  	 	 	 	 	 $this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
1469  	 	 	 	 }
1470  	 	 	 	 $p++;
1471  	 	 	 }
1472  	 	 }
1473  	 	 return $this->dataStr;
1474  	 }
1475  
1476  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
1477  
1478  	 // QRinputItem
1479  
1480  	 /**
1481  	  * newInputItem
1482  	  * @param int $mode
1483  	  * @param int $size
1484  	  * @param array $data
1485  	  * @param array $bstream
1486  	  * @return array input item
1487  	  */
1488  	 protected function newInputItem($mode, $size, $data, $bstream=null) {
1489  	 	 $setData = array_slice($data, 0, $size);
1490  	 	 if (count($setData) < $size) {
1491  	 	 	 $setData = array_merge($setData, array_fill(0, ($size - count($setData)), 0));
1492  	 	 }
1493  	 	 if (!$this->check($mode, $size, $setData)) {
1494  	 	 	 return NULL;
1495  	 	 }
1496  	 	 $inputitem = array();
1497  	 	 $inputitem['mode'] = $mode;
1498  	 	 $inputitem['size'] = $size;
1499  	 	 $inputitem['data'] = $setData;
1500  	 	 $inputitem['bstream'] = $bstream;
1501  	 	 return $inputitem;
1502  	 }
1503  
1504  	 /**
1505  	  * encodeModeNum
1506  	  * @param array $inputitem
1507  	  * @param int $version
1508  	  * @return array input item
1509  	  */
1510  	 protected function encodeModeNum($inputitem, $version) {
1511  	 	 $words = (int)($inputitem['size'] / 3);
1512  	 	 $inputitem['bstream'] = array();
1513  	 	 $val = 0x1;
1514  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1515  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']);
1516  	 	 for ($i=0; $i < $words; ++$i) {
1517  	 	 	 $val  = (ord($inputitem['data'][$i*3  ]) - ord('0')) * 100;
1518  	 	 	 $val += (ord($inputitem['data'][$i*3+1]) - ord('0')) * 10;
1519  	 	 	 $val += (ord($inputitem['data'][$i*3+2]) - ord('0'));
1520  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
1521  	 	 }
1522  	 	 if ($inputitem['size'] - $words * 3 == 1) {
1523  	 	 	 $val = ord($inputitem['data'][$words*3]) - ord('0');
1524  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
1525  	 	 } elseif (($inputitem['size'] - ($words * 3)) == 2) {
1526  	 	 	 $val  = (ord($inputitem['data'][$words*3  ]) - ord('0')) * 10;
1527  	 	 	 $val += (ord($inputitem['data'][$words*3+1]) - ord('0'));
1528  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
1529  	 	 }
1530  	 	 return $inputitem;
1531  	 }
1532  
1533  	 /**
1534  	  * encodeModeAn
1535  	  * @param array $inputitem
1536  	  * @param int $version
1537  	  * @return array input item
1538  	  */
1539  	 protected function encodeModeAn($inputitem, $version) {
1540  	 	 $words = (int)($inputitem['size'] / 2);
1541  	 	 $inputitem['bstream'] = array();
1542  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
1543  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']);
1544  	 	 for ($i=0; $i < $words; ++$i) {
1545  	 	 	 $val  = (int)($this->lookAnTable(ord($inputitem['data'][$i*2])) * 45);
1546  	 	 	 $val += (int)($this->lookAnTable(ord($inputitem['data'][($i*2)+1])));
1547  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
1548  	 	 }
1549  	 	 if ($inputitem['size'] & 1) {
1550  	 	 	 $val = $this->lookAnTable(ord($inputitem['data'][($words * 2)]));
1551  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
1552  	 	 }
1553  	 	 return $inputitem;
1554  	 }
1555  
1556  	 /**
1557  	  * encodeMode8
1558  	  * @param array $inputitem
1559  	  * @param int $version
1560  	  * @return array input item
1561  	  */
1562  	 protected function encodeMode8($inputitem, $version) {
1563  	 	 $inputitem['bstream'] = array();
1564  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
1565  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']);
1566  	 	 for ($i=0; $i < $inputitem['size']; ++$i) {
1567  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][$i]));
1568  	 	 }
1569  	 	 return $inputitem;
1570  	 }
1571  
1572  	 /**
1573  	  * encodeModeKanji
1574  	  * @param array $inputitem
1575  	  * @param int $version
1576  	  * @return array input item
1577  	  */
1578  	 protected function encodeModeKanji($inputitem, $version) {
1579  	 	 $inputitem['bstream'] = array();
1580  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
1581  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int)($inputitem['size'] / 2));
1582  	 	 for ($i=0; $i<$inputitem['size']; $i+=2) {
1583  	 	 	 $val = (ord($inputitem['data'][$i]) << 8) | ord($inputitem['data'][$i+1]);
1584  	 	 	 if ($val <= 0x9ffc) {
1585  	 	 	 	 $val -= 0x8140;
1586  	 	 	 } else {
1587  	 	 	 	 $val -= 0xc140;
1588  	 	 	 }
1589  	 	 	 $h = ($val >> 8) * 0xc0;
1590  	 	 	 $val = ($val & 0xff) + $h;
1591  	 	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
1592  	 	 }
1593  	 	 return $inputitem;
1594  	 }
1595  
1596  	 /**
1597  	  * encodeModeStructure
1598  	  * @param array $inputitem
1599  	  * @return array input item
1600  	  */
1601  	 protected function encodeModeStructure($inputitem) {
1602  	 	 $inputitem['bstream'] = array();
1603  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
1604  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][1]) - 1);
1605  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, ord($inputitem['data'][0]) - 1);
1606  	 	 $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, ord($inputitem['data'][2]));
1607  	 	 return $inputitem;
1608  	 }
1609  
1610  	 /**
1611  	  * encodeBitStream
1612  	  * @param array $inputitem
1613  	  * @param int $version
1614  	  * @return array input item
1615  	  */
1616  	 protected function encodeBitStream($inputitem, $version) {
1617  	 	 $inputitem['bstream'] = array();
1618  	 	 $words = $this->maximumWords($inputitem['mode'], $version);
1619  	 	 if ($inputitem['size'] > $words) {
1620  	 	 	 $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
1621  	 	 	 $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, array_slice($inputitem['data'], $words));
1622  	 	 	 $st1 = $this->encodeBitStream($st1, $version);
1623  	 	 	 $st2 = $this->encodeBitStream($st2, $version);
1624  	 	 	 $inputitem['bstream'] = array();
1625  	 	 	 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
1626  	 	 	 $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
1627  	 	 } else {
1628  	 	 	 switch($inputitem['mode']) {
1629  	 	 	 	 case QR_MODE_NM: {
1630  	 	 	 	 	 $inputitem = $this->encodeModeNum($inputitem, $version);
1631  	 	 	 	 	 break;
1632  	 	 	 	 }
1633  	 	 	 	 case QR_MODE_AN: {
1634  	 	 	 	 	 $inputitem = $this->encodeModeAn($inputitem, $version);
1635  	 	 	 	 	 break;
1636  	 	 	 	 }
1637  	 	 	 	 case QR_MODE_8B: {
1638  	 	 	 	 	 $inputitem = $this->encodeMode8($inputitem, $version);
1639  	 	 	 	 	 break;
1640  	 	 	 	 }
1641  	 	 	 	 case QR_MODE_KJ: {
1642  	 	 	 	 	 $inputitem = $this->encodeModeKanji($inputitem, $version);
1643  	 	 	 	 	 break;
1644  	 	 	 	 }
1645  	 	 	 	 case QR_MODE_ST: {
1646  	 	 	 	 	 $inputitem = $this->encodeModeStructure($inputitem);
1647  	 	 	 	 	 break;
1648  	 	 	 	 }
1649  	 	 	 	 default: {
1650  	 	 	 	 	 break;
1651  	 	 	 	 }
1652  	 	 	 }
1653  	 	 }
1654  	 	 return $inputitem;
1655  	 }
1656  
1657  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
1658  
1659  	 // QRinput
1660  
1661  	 /**
1662  	  * Append data to an input object.
1663  	  * The data is copied and appended to the input object.
1664  	  * @param array $items input items
1665  	  * @param int $mode encoding mode.
1666  	  * @param int $size size of data (byte).
1667  	  * @param array $data array of input data.
1668  	  * @return array items
1669  	  *
1670  	  */
1671  	protected function appendNewInputItem($items, $mode, $size, $data) {
1672  	 	 $newitem = $this->newInputItem($mode, $size, $data);
1673  	 	 if (!empty($newitem)) {
1674  	 	 	 $items[] = $newitem;
1675  	 	 }
1676  	 	 return $items;
1677  	 }
1678  
1679  	 /**
1680  	  * insertStructuredAppendHeader
1681  	  * @param array $items
1682  	  * @param int $size
1683  	  * @param int $index
1684  	  * @param int $parity
1685  	  * @return array items
1686  	  */
1687  	 protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
1688  	 	 if ($size > MAX_STRUCTURED_SYMBOLS) {
1689  	 	 	 return -1;
1690  	 	 }
1691  	 	 if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
1692  	 	 	 return -1;
1693  	 	 }
1694  	 	 $buf = array($size, $index, $parity);
1695  	 	 $entry = $this->newInputItem(QR_MODE_ST, 3, buf);
1696  	 	 array_unshift($items, $entry);
1697  	 	 return $items;
1698  	 }
1699  
1700  	 /**
1701  	  * calcParity
1702  	  * @param array $items
1703  	  * @return int parity
1704  	  */
1705  	 protected function calcParity($items) {
1706  	 	 $parity = 0;
1707  	 	 foreach ($items as $item) {
1708  	 	 	 if ($item['mode'] != QR_MODE_ST) {
1709  	 	 	 	 for ($i=$item['size']-1; $i>=0; --$i) {
1710  	 	 	 	 	 $parity ^= $item['data'][$i];
1711  	 	 	 	 }
1712  	 	 	 }
1713  	 	 }
1714  	 	 return $parity;
1715  	 }
1716  
1717  	 /**
1718  	  * checkModeNum
1719  	  * @param int $size
1720  	  * @param array $data
1721  	  * @return boolean true or false
1722  	  */
1723  	 protected function checkModeNum($size, $data) {
1724  	 	 for ($i=0; $i<$size; ++$i) {
1725  	 	 	 if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
1726  	 	 	 	 return false;
1727  	 	 	 }
1728  	 	 }
1729  	 	 return true;
1730  	 }
1731  
1732  	 /**
1733  	  * Look up the alphabet-numeric conversion table (see JIS X0510:2004, pp.19).
1734  	  * @param int $c character value
1735  	  * @return int value
1736  	  */
1737  	protected function lookAnTable($c) {
1738  	 	 return (($c > 127)?-1:$this->anTable[$c]);
1739  	 }
1740  
1741  	 /**
1742  	  * checkModeAn
1743  	  * @param int $size
1744  	  * @param array $data
1745  	  * @return boolean true or false
1746  	  */
1747  	 protected function checkModeAn($size, $data) {
1748  	 	 for ($i=0; $i<$size; ++$i) {
1749  	 	 	 if ($this->lookAnTable(ord($data[$i])) == -1) {
1750  	 	 	 	 return false;
1751  	 	 	 }
1752  	 	 }
1753  	 	 return true;
1754  	 }
1755  
1756  	 /**
1757  	  * estimateBitsModeNum
1758  	  * @param int $size
1759  	  * @return int number of bits
1760  	  */
1761  	 protected function estimateBitsModeNum($size) {
1762  	 	 $w = (int)($size / 3);
1763  	 	 $bits = ($w * 10);
1764  	 	 switch($size - ($w * 3)) {
1765  	 	 	 case 1: {
1766  	 	 	 	 $bits += 4;
1767  	 	 	 	 break;
1768  	 	 	 }
1769  	 	 	 case 2: {
1770  	 	 	 	 $bits += 7;
1771  	 	 	 	 break;
1772  	 	 	 }
1773  	 	 }
1774  	 	 return $bits;
1775  	 }
1776  
1777  	 /**
1778  	  * estimateBitsModeAn
1779  	  * @param int $size
1780  	  * @return int number of bits
1781  	  */
1782  	 protected function estimateBitsModeAn($size) {
1783  	 	 $bits = (int)($size * 5.5); // (size / 2 ) * 11
1784  	 	 if ($size & 1) {
1785  	 	 	 $bits += 6;
1786  	 	 }
1787  	 	 return $bits;
1788  	 }
1789  
1790  	 /**
1791  	  * estimateBitsMode8
1792  	  * @param int $size
1793  	  * @return int number of bits
1794  	  */
1795  	 protected function estimateBitsMode8($size) {
1796  	 	 return (int)($size * 8);
1797  	 }
1798  
1799  	 /**
1800  	  * estimateBitsModeKanji
1801  	  * @param int $size
1802  	  * @return int number of bits
1803  	  */
1804  	 protected function estimateBitsModeKanji($size) {
1805  	 	 return (int)($size * 6.5); // (size / 2 ) * 13
1806  	 }
1807  
1808  	 /**
1809  	  * checkModeKanji
1810  	  * @param int $size
1811  	  * @param array $data
1812  	  * @return boolean true or false
1813  	  */
1814  	 protected function checkModeKanji($size, $data) {
1815  	 	 if ($size & 1) {
1816  	 	 	 return false;
1817  	 	 }
1818  	 	 for ($i=0; $i<$size; $i+=2) {
1819  	 	 	 $val = (ord($data[$i]) << 8) | ord($data[$i+1]);
1820  	 	 	 if (($val < 0x8140) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) {
1821  	 	 	 	 return false;
1822  	 	 	 }
1823  	 	 }
1824  	 	 return true;
1825  	 }
1826  
1827  	 /**
1828  	  * Validate the input data.
1829  	  * @param int $mode encoding mode.
1830  	  * @param int $size size of data (byte).
1831  	  * @param array $data data to validate
1832  	  * @return boolean true in case of valid data, false otherwise
1833  	  */
1834  	protected function check($mode, $size, $data) {
1835  	 	 if ($size <= 0) {
1836  	 	 	 return false;
1837  	 	 }
1838  	 	 switch($mode) {
1839  	 	 	 case QR_MODE_NM: {
1840  	 	 	 	 return $this->checkModeNum($size, $data);
1841  	 	 	 }
1842  	 	 	 case QR_MODE_AN: {
1843  	 	 	 	 return $this->checkModeAn($size, $data);
1844  	 	 	 }
1845  	 	 	 case QR_MODE_KJ: {
1846  	 	 	 	 return $this->checkModeKanji($size, $data);
1847  	 	 	 }
1848  	 	 	 case QR_MODE_8B: {
1849  	 	 	 	 return true;
1850  	 	 	 }
1851  	 	 	 case QR_MODE_ST: {
1852  	 	 	 	 return true;
1853  	 	 	 }
1854  	 	 	 default: {
1855  	 	 	 	 break;
1856  	 	 	 }
1857  	 	 }
1858  	 	 return false;
1859  	 }
1860  
1861  	 /**
1862  	  * estimateBitStreamSize
1863  	  * @param array $items
1864  	  * @param int $version
1865  	  * @return int bits
1866  	  */
1867  	 protected function estimateBitStreamSize($items, $version) {
1868  	 	 $bits = 0;
1869  	 	 if ($version == 0) {
1870  	 	 	 $version = 1;
1871  	 	 }
1872  	 	 foreach ($items as $item) {
1873  	 	 	 switch($item['mode']) {
1874  	 	 	 	 case QR_MODE_NM: {
1875  	 	 	 	 	 $bits = $this->estimateBitsModeNum($item['size']);
1876  	 	 	 	 	 break;
1877  	 	 	 	 }
1878  	 	 	 	 case QR_MODE_AN: {
1879  	 	 	 	 	 $bits = $this->estimateBitsModeAn($item['size']);
1880  	 	 	 	 	 break;
1881  	 	 	 	 }
1882  	 	 	 	 case QR_MODE_8B: {
1883  	 	 	 	 	 $bits = $this->estimateBitsMode8($item['size']);
1884  	 	 	 	 	 break;
1885  	 	 	 	 }
1886  	 	 	 	 case QR_MODE_KJ: {
1887  	 	 	 	 	 $bits = $this->estimateBitsModeKanji($item['size']);
1888  	 	 	 	 	 break;
1889  	 	 	 	 }
1890  	 	 	 	 case QR_MODE_ST: {
1891  	 	 	 	 	 return STRUCTURE_HEADER_BITS;
1892  	 	 	 	 }
1893  	 	 	 	 default: {
1894  	 	 	 	 	 return 0;
1895  	 	 	 	 }
1896  	 	 	 }
1897  	 	 	 $l = $this->lengthIndicator($item['mode'], $version);
1898  	 	 	 $m = 1 << $l;
1899  	 	 	 $num = (int)(($item['size'] + $m - 1) / $m);
1900  	 	 	 $bits += $num * (4 + $l);
1901  	 	 }
1902  	 	 return $bits;
1903  	 }
1904  
1905  	 /**
1906  	  * estimateVersion
1907  	  * @param array $items
1908  	  * @return int version
1909  	  */
1910  	 protected function estimateVersion($items) {
1911  	 	 $version = 0;
1912  	 	 $prev = 0;
1913  	 	 do {
1914  	 	 	 $prev = $version;
1915  	 	 	 $bits = $this->estimateBitStreamSize($items, $prev);
1916  	 	 	 $version = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
1917  	 	 	 if ($version < 0) {
1918  	 	 	 	 return -1;
1919  	 	 	 }
1920  	 	 } while ($version > $prev);
1921  	 	 return $version;
1922  	 }
1923  
1924  	 /**
1925  	  * lengthOfCode
1926  	  * @param int $mode
1927  	  * @param int $version
1928  	  * @param int $bits
1929  	  * @return int size
1930  	  */
1931  	 protected function lengthOfCode($mode, $version, $bits) {
1932  	 	 $payload = $bits - 4 - $this->lengthIndicator($mode, $version);
1933  	 	 switch($mode) {
1934  	 	 	 case QR_MODE_NM: {
1935  	 	 	 	 $chunks = (int)($payload / 10);
1936  	 	 	 	 $remain = $payload - $chunks * 10;
1937  	 	 	 	 $size = $chunks * 3;
1938  	 	 	 	 if ($remain >= 7) {
1939  	 	 	 	 	 $size += 2;
1940  	 	 	 	 } elseif ($remain >= 4) {
1941  	 	 	 	 	 $size += 1;
1942  	 	 	 	 }
1943  	 	 	 	 break;
1944  	 	 	 }
1945  	 	 	 case QR_MODE_AN: {
1946  	 	 	 	 $chunks = (int)($payload / 11);
1947  	 	 	 	 $remain = $payload - $chunks * 11;
1948  	 	 	 	 $size = $chunks * 2;
1949  	 	 	 	 if ($remain >= 6) {
1950  	 	 	 	 	 ++$size;
1951  	 	 	 	 }
1952  	 	 	 	 break;
1953  	 	 	 }
1954  	 	 	 case QR_MODE_8B: {
1955  	 	 	 	 $size = (int)($payload / 8);
1956  	 	 	 	 break;
1957  	 	 	 }
1958  	 	 	 case QR_MODE_KJ: {
1959  	 	 	 	 $size = (int)(($payload / 13) * 2);
1960  	 	 	 	 break;
1961  	 	 	 }
1962  	 	 	 case QR_MODE_ST: {
1963  	 	 	 	 $size = (int)($payload / 8);
1964  	 	 	 	 break;
1965  	 	 	 }
1966  	 	 	 default: {
1967  	 	 	 	 $size = 0;
1968  	 	 	 	 break;
1969  	 	 	 }
1970  	 	 }
1971  	 	 $maxsize = $this->maximumWords($mode, $version);
1972  	 	 if ($size < 0) {
1973  	 	 	 $size = 0;
1974  	 	 }
1975  	 	 if ($size > $maxsize) {
1976  	 	 	 $size = $maxsize;
1977  	 	 }
1978  	 	 return $size;
1979  	 }
1980  
1981  	 /**
1982  	  * createBitStream
1983  	  * @param array $items
1984  	  * @return array of items and total bits
1985  	  */
1986  	 protected function createBitStream($items) {
1987  	 	 $total = 0;
1988  	 	 foreach ($items as $key => $item) {
1989  	 	 	 $items[$key] = $this->encodeBitStream($item, $this->version);
1990  	 	 	 $bits = count($items[$key]['bstream']);
1991  	 	 	 $total += $bits;
1992  	 	 }
1993  	 	 return array($items, $total);
1994  	 }
1995  
1996  	 /**
1997  	  * convertData
1998  	  * @param array $items
1999  	  * @return array items
2000  	  */
2001  	 protected function convertData($items) {
2002  	 	 $ver = $this->estimateVersion($items);
2003  	 	 if ($ver > $this->version) {
2004  	 	 	 $this->version = $ver;
2005  	 	 }
2006  	 	 while (true) {
2007  	 	 	 $cbs = $this->createBitStream($items);
2008  	 	 	 $items = $cbs[0];
2009  	 	 	 $bits = $cbs[1];
2010  	 	 	 if ($bits < 0) {
2011  	 	 	 	 return -1;
2012  	 	 	 }
2013  	 	 	 $ver = $this->getMinimumVersion((int)(($bits + 7) / 8), $this->level);
2014  	 	 	 if ($ver < 0) {
2015  	 	 	 	 return -1;
2016  	 	 	 } elseif ($ver > $this->version) {
2017  	 	 	 	 $this->version = $ver;
2018  	 	 	 } else {
2019  	 	 	 	 break;
2020  	 	 	 }
2021  	 	 }
2022  	 	 return $items;
2023  	 }
2024  
2025  	 /**
2026  	  * Append Padding Bit to bitstream
2027  	  * @param array $bstream
2028  	  * @return array bitstream
2029  	  */
2030  	 protected function appendPaddingBit($bstream) {
2031  	  	 if (is_null($bstream)) {
2032  	  	 	 return null;
2033  	  	 }
2034  	 	 $bits = count($bstream);
2035  	 	 $maxwords = $this->getDataLength($this->version, $this->level);
2036  	 	 $maxbits = $maxwords * 8;
2037  	 	 if ($maxbits == $bits) {
2038  	 	 	 return $bstream;
2039  	 	 }
2040  	 	 if ($maxbits - $bits < 5) {
2041  	 	 	 return $this->appendNum($bstream, $maxbits - $bits, 0);
2042  	 	 }
2043  	 	 $bits += 4;
2044  	 	 $words = (int)(($bits + 7) / 8);
2045  	 	 $padding = array();
2046  	 	 $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
2047  	 	 $padlen = $maxwords - $words;
2048  	 	 if ($padlen > 0) {
2049  	 	 	 $padbuf = array();
2050  	 	 	 for ($i=0; $i<$padlen; ++$i) {
2051  	 	 	 	 $padbuf[$i] = ($i&1)?0x11:0xec;
2052  	 	 	 }
2053  	 	 	 $padding = $this->appendBytes($padding, $padlen, $padbuf);
2054  	 	 }
2055  	 	 return $this->appendBitstream($bstream, $padding);
2056  	 }
2057  
2058  	 /**
2059  	  * mergeBitStream
2060  	  * @param array $items items
2061  	  * @return array bitstream
2062  	  */
2063  	 protected function mergeBitStream($items) {
2064  	 	 $items = $this->convertData($items);
2065  	 	 if (!is_array($items)) {
2066  	 	 	 return null;
2067  	 	 }
2068  	 	 $bstream = array();
2069  	 	 foreach ($items as $item) {
2070  	 	 	 $bstream = $this->appendBitstream($bstream, $item['bstream']);
2071  	 	 }
2072  	 	 return $bstream;
2073  	 }
2074  
2075  	 /**
2076  	  * Returns a stream of bits.
2077  	  * @param int $items
2078  	  * @return array padded merged byte stream
2079  	  */
2080  	protected function getBitStream($items) {
2081  	 	 $bstream = $this->mergeBitStream($items);
2082  	 	 return $this->appendPaddingBit($bstream);
2083  	 }
2084  
2085  	 /**
2086  	  * Pack all bit streams padding bits into a byte array.
2087  	  * @param int $items
2088  	  * @return array padded merged byte stream
2089  	  */
2090  	protected function getByteStream($items) {
2091  	 	 $bstream = $this->getBitStream($items);
2092  	 	 return $this->bitstreamToByte($bstream);
2093  	 }
2094  
2095  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
2096  
2097  	 // QRbitstream
2098  
2099  	 /**
2100  	  * Return an array with zeros
2101  	  * @param int $setLength array size
2102  	  * @return array
2103  	  */
2104  	 protected function allocate($setLength) {
2105  	 	 return array_fill(0, $setLength, 0);
2106  	 }
2107  
2108  	 /**
2109  	  * Return new bitstream from number
2110  	  * @param int $bits number of bits
2111  	  * @param int $num number
2112  	  * @return array bitstream
2113  	  */
2114  	 protected function newFromNum($bits, $num) {
2115  	 	 $bstream = $this->allocate($bits);
2116  	 	 $mask = 1 << ($bits - 1);
2117  	 	 for ($i=0; $i<$bits; ++$i) {
2118  	 	 	 if ($num & $mask) {
2119  	 	 	 	 $bstream[$i] = 1;
2120  	 	 	 } else {
2121  	 	 	 	 $bstream[$i] = 0;
2122  	 	 	 }
2123  	 	 	 $mask = $mask >> 1;
2124  	 	 }
2125  	 	 return $bstream;
2126  	 }
2127  
2128  	 /**
2129  	  * Return new bitstream from bytes
2130  	  * @param int $size size
2131  	  * @param array $data bytes
2132  	  * @return array bitstream
2133  	  */
2134  	 protected function newFromBytes($size, $data) {
2135  	 	 $bstream = $this->allocate($size * 8);
2136  	 	 $p=0;
2137  	 	 for ($i=0; $i<$size; ++$i) {
2138  	 	 	 $mask = 0x80;
2139  	 	 	 for ($j=0; $j<8; ++$j) {
2140  	 	 	 	 if ($data[$i] & $mask) {
2141  	 	 	 	 	 $bstream[$p] = 1;
2142  	 	 	 	 } else {
2143  	 	 	 	 	 $bstream[$p] = 0;
2144  	 	 	 	 }
2145  	 	 	 	 $p++;
2146  	 	 	 	 $mask = $mask >> 1;
2147  	 	 	 }
2148  	 	 }
2149  	 	 return $bstream;
2150  	 }
2151  
2152  	 /**
2153  	  * Append one bitstream to another
2154  	  * @param array $bitstream original bitstream
2155  	  * @param array $append bitstream to append
2156  	  * @return array bitstream
2157  	  */
2158  	 protected function appendBitstream($bitstream, $append) {
2159  	 	 if ((!is_array($append)) OR (count($append) == 0)) {
2160  	 	 	 return $bitstream;
2161  	 	 }
2162  	 	 if (count($bitstream) == 0) {
2163  	 	 	 return $append;
2164  	 	 }
2165  	 	 return array_values(array_merge($bitstream, $append));
2166  	 }
2167  
2168  	 /**
2169  	  * Append one bitstream created from number to another
2170  	  * @param array $bitstream original bitstream
2171  	  * @param int $bits number of bits
2172  	  * @param int $num number
2173  	  * @return array bitstream
2174  	  */
2175  	 protected function appendNum($bitstream, $bits, $num) {
2176  	 	 if ($bits == 0) {
2177  	 	 	 return 0;
2178  	 	 }
2179  	 	 $b = $this->newFromNum($bits, $num);
2180  	 	 return $this->appendBitstream($bitstream, $b);
2181  	 }
2182  
2183  	 /**
2184  	  * Append one bitstream created from bytes to another
2185  	  * @param array $bitstream original bitstream
2186  	  * @param int $size size
2187  	  * @param array $data bytes
2188  	  * @return array bitstream
2189  	  */
2190  	 protected function appendBytes($bitstream, $size, $data) {
2191  	 	 if ($size == 0) {
2192  	 	 	 return 0;
2193  	 	 }
2194  	 	 $b = $this->newFromBytes($size, $data);
2195  	 	 return $this->appendBitstream($bitstream, $b);
2196  	 }
2197  
2198  	 /**
2199  	  * Convert bitstream to bytes
2200  	  * @param array $bstream original bitstream
2201  	  * @return array of bytes
2202  	  */
2203  	 protected function bitstreamToByte($bstream) {
2204  	 	 if (is_null($bstream)) {
2205  	  	 	 return null;
2206  	  	 }
2207  	 	 $size = count($bstream);
2208  	 	 if ($size == 0) {
2209  	 	 	 return array();
2210  	 	 }
2211  	 	 $data = array_fill(0, (int)(($size + 7) / 8), 0);
2212  	 	 $bytes = (int)($size / 8);
2213  	 	 $p = 0;
2214  	 	 for ($i=0; $i<$bytes; $i++) {
2215  	 	 	 $v = 0;
2216  	 	 	 for ($j=0; $j<8; $j++) {
2217  	 	 	 	 $v = $v << 1;
2218  	 	 	 	 $v |= $bstream[$p];
2219  	 	 	 	 $p++;
2220  	 	 	 }
2221  	 	 	 $data[$i] = $v;
2222  	 	 }
2223  	 	 if ($size & 7) {
2224  	 	 	 $v = 0;
2225  	 	 	 for ($j=0; $j<($size & 7); $j++) {
2226  	 	 	 	 $v = $v << 1;
2227  	 	 	 	 $v |= $bstream[$p];
2228  	 	 	 	 $p++;
2229  	 	 	 }
2230  	 	 	 $data[$bytes] = $v;
2231  	 	 }
2232  	 	 return $data;
2233  	 }
2234  
2235  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
2236  
2237  	 // QRspec
2238  
2239  	 /**
2240  	  * Replace a value on the array at the specified position
2241  	  * @param array $srctab
2242  	  * @param int $x X position
2243  	  * @param int $y Y position
2244  	  * @param string $repl value to replace
2245  	  * @param int $replLen length of the repl string
2246  	  * @return array srctab
2247  	  */
2248  	 protected function qrstrset($srctab, $x, $y, $repl, $replLen=false) {
2249  	 	 $srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
2250  	 	 return $srctab;
2251  	 }
2252  
2253  	 /**
2254  	  * Return maximum data code length (bytes) for the version.
2255  	  * @param int $version version
2256  	  * @param int $level error correction level
2257  	  * @return int maximum size (bytes)
2258  	  */
2259  	protected function getDataLength($version, $level) {
2260  	 	 return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level];
2261  	 }
2262  
2263  	 /**
2264  	  * Return maximum error correction code length (bytes) for the version.
2265  	  * @param int $version version
2266  	  * @param int $level error correction level
2267  	  * @return int ECC size (bytes)
2268  	  */
2269  	protected function getECCLength($version, $level){
2270  	 	 return $this->capacity[$version][QRCAP_EC][$level];
2271  	 }
2272  
2273  	 /**
2274  	  * Return the width of the symbol for the version.
2275  	  * @param int $version version
2276  	  * @return int width
2277  	  */
2278  	protected function getWidth($version) {
2279  	 	 return $this->capacity[$version][QRCAP_WIDTH];
2280  	 }
2281  
2282  	 /**
2283  	  * Return the numer of remainder bits.
2284  	  * @param int $version version
2285  	  * @return int number of remainder bits
2286  	  */
2287  	protected function getRemainder($version) {
2288  	 	 return $this->capacity[$version][QRCAP_REMINDER];
2289  	 }
2290  
2291  	 /**
2292  	  * Return a version number that satisfies the input code length.
2293  	  * @param int $size input code length (bytes)
2294  	  * @param int $level error correction level
2295  	  * @return int version number
2296  	  */
2297  	protected function getMinimumVersion($size, $level) {
2298  	 	 for ($i = 1; $i <= QRSPEC_VERSION_MAX; ++$i) {
2299  	 	 	 $words = ($this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]);
2300  	 	 	 if ($words >= $size) {
2301  	 	 	 	 return $i;
2302  	 	 	 }
2303  	 	 }
2304  	 	 // the size of input data is greater than QR capacity, try to lover the error correction mode
2305  	 	 return -1;
2306  	 }
2307  
2308  	 /**
2309  	  * Return the size of length indicator for the mode and version.
2310  	  * @param int $mode encoding mode
2311  	  * @param int $version version
2312  	  * @return int the size of the appropriate length indicator (bits).
2313  	  */
2314  	protected function lengthIndicator($mode, $version) {
2315  	 	 if ($mode == QR_MODE_ST) {
2316  	 	 	 return 0;
2317  	 	 }
2318  	 	 if ($version <= 9) {
2319  	 	 	 $l = 0;
2320  	 	 } elseif ($version <= 26) {
2321  	 	 	 $l = 1;
2322  	 	 } else {
2323  	 	 	 $l = 2;
2324  	 	 }
2325  	 	 return $this->lengthTableBits[$mode][$l];
2326  	 }
2327  
2328  	 /**
2329  	  * Return the maximum length for the mode and version.
2330  	  * @param int $mode encoding mode
2331  	  * @param int $version version
2332  	  * @return int the maximum length (bytes)
2333  	  */
2334  	protected function maximumWords($mode, $version) {
2335  	 	 if ($mode == QR_MODE_ST) {
2336  	 	 	 return 3;
2337  	 	 }
2338  	 	 if ($version <= 9) {
2339  	 	 	 $l = 0;
2340  	 	 } else if ($version <= 26) {
2341  	 	 	 $l = 1;
2342  	 	 } else {
2343  	 	 	 $l = 2;
2344  	 	 }
2345  	 	 $bits = $this->lengthTableBits[$mode][$l];
2346  	 	 $words = (1 << $bits) - 1;
2347  	 	 if ($mode == QR_MODE_KJ) {
2348  	 	 	 $words *= 2; // the number of bytes is required
2349  	 	 }
2350  	 	 return $words;
2351  	 }
2352  
2353  	 /**
2354  	  * Return an array of ECC specification.
2355  	  * @param int $version version
2356  	  * @param int $level error correction level
2357  	  * @param array $spec an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code}
2358  	  * @return array spec
2359  	  */
2360  	protected function getEccSpec($version, $level, $spec) {
2361  	 	 if (count($spec) < 5) {
2362  	 	 	 $spec = array(0, 0, 0, 0, 0);
2363  	 	 }
2364  	 	 $b1 = $this->eccTable[$version][$level][0];
2365  	 	 $b2 = $this->eccTable[$version][$level][1];
2366  	 	 $data = $this->getDataLength($version, $level);
2367  	 	 $ecc = $this->getECCLength($version, $level);
2368  	 	 if ($b2 == 0) {
2369  	 	 	 $spec[0] = $b1;
2370  	 	 	 $spec[1] = (int)($data / $b1);
2371  	 	 	 $spec[2] = (int)($ecc / $b1);
2372  	 	 	 $spec[3] = 0;
2373  	 	 	 $spec[4] = 0;
2374  	 	 } else {
2375  	 	 	 $spec[0] = $b1;
2376  	 	 	 $spec[1] = (int)($data / ($b1 + $b2));
2377  	 	 	 $spec[2] = (int)($ecc  / ($b1 + $b2));
2378  	 	 	 $spec[3] = $b2;
2379  	 	 	 $spec[4] = $spec[1] + 1;
2380  	 	 }
2381  	 	 return $spec;
2382  	 }
2383  
2384  	 /**
2385  	  * Put an alignment marker.
2386  	  * @param array $frame frame
2387  	  * @param int $ox X center coordinate of the pattern
2388  	  * @param int $oy Y center coordinate of the pattern
2389  	  * @return array frame
2390  	  */
2391  	protected function putAlignmentMarker($frame, $ox, $oy) {
2392  	 	 $finder = array(
2393  	 	 	 "\xa1\xa1\xa1\xa1\xa1",
2394  	 	 	 "\xa1\xa0\xa0\xa0\xa1",
2395  	 	 	 "\xa1\xa0\xa1\xa0\xa1",
2396  	 	 	 "\xa1\xa0\xa0\xa0\xa1",
2397  	 	 	 "\xa1\xa1\xa1\xa1\xa1"
2398  	 	 	 );
2399  	 	 $yStart = $oy - 2;
2400  	 	 $xStart = $ox - 2;
2401  	 	 for ($y=0; $y < 5; $y++) {
2402  	 	 	 $frame = $this->qrstrset($frame, $xStart, $yStart+$y, $finder[$y]);
2403  	 	 }
2404  	 	 return $frame;
2405  	 }
2406  
2407  	 /**
2408  	  * Put an alignment pattern.
2409  	  * @param int $version version
2410  	  * @param array $frame frame
2411  	  * @param int $width width
2412  	  * @return array frame
2413  	  */
2414  	 protected function putAlignmentPattern($version, $frame, $width) {
2415  	 	 if ($version < 2) {
2416  	 	 	 return $frame;
2417  	 	 }
2418  	 	 $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0];
2419  	 	 if ($d < 0) {
2420  	 	 	 $w = 2;
2421  	 	 } else {
2422  	 	 	 $w = (int)(($width - $this->alignmentPattern[$version][0]) / $d + 2);
2423  	 	 }
2424  	 	 if ($w * $w - 3 == 1) {
2425  	 	 	 $x = $this->alignmentPattern[$version][0];
2426  	 	 	 $y = $this->alignmentPattern[$version][0];
2427  	 	 	 $frame = $this->putAlignmentMarker($frame, $x, $y);
2428  	 	 	 return $frame;
2429  	 	 }
2430  	 	 $cx = $this->alignmentPattern[$version][0];
2431  	 	 $wo = $w - 1;
2432  	 	 for ($x=1; $x < $wo; ++$x) {
2433  	 	 	 $frame = $this->putAlignmentMarker($frame, 6, $cx);
2434  	 	 	 $frame = $this->putAlignmentMarker($frame, $cx,  6);
2435  	 	 	 $cx += $d;
2436  	 	 }
2437  	 	 $cy = $this->alignmentPattern[$version][0];
2438  	 	 for ($y=0; $y < $wo; ++$y) {
2439  	 	 	 $cx = $this->alignmentPattern[$version][0];
2440  	 	 	 for ($x=0; $x < $wo; ++$x) {
2441  	 	 	 	 $frame = $this->putAlignmentMarker($frame, $cx, $cy);
2442  	 	 	 	 $cx += $d;
2443  	 	 	 }
2444  	 	 	 $cy += $d;
2445  	 	 }
2446  	 	 return $frame;
2447  	 }
2448  
2449  	 /**
2450  	  * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits.
2451  	  * @param int $version version
2452  	  * @return string BCH encoded version information pattern
2453  	  */
2454  	protected function getVersionPattern($version) {
2455  	 	 if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) {
2456  	 	 	 return 0;
2457  	 	 }
2458  	 	 return $this->versionPattern[($version - 7)];
2459  	 }
2460  
2461  	 /**
2462  	  * Return BCH encoded format information pattern.
2463  	  * @param array $mask
2464  	  * @param int $level error correction level
2465  	  * @return string BCH encoded format information pattern
2466  	  */
2467  	protected function getFormatInfo($mask, $level) {
2468  	 	 if (($mask < 0) OR ($mask > 7)) {
2469  	 	 	 return 0;
2470  	 	 }
2471  	 	 if (($level < 0) OR ($level > 3)) {
2472  	 	 	 return 0;
2473  	 	 }
2474  	 	 return $this->formatInfo[$level][$mask];
2475  	 }
2476  
2477  	 /**
2478  	  * Put a finder pattern.
2479  	  * @param array $frame frame
2480  	  * @param int $ox X center coordinate of the pattern
2481  	  * @param int $oy Y center coordinate of the pattern
2482  	  * @return array frame
2483  	  */
2484  	protected function putFinderPattern($frame, $ox, $oy) {
2485  	 	 $finder = array(
2486  	 	 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
2487  	 	 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2488  	 	 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2489  	 	 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2490  	 	 "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
2491  	 	 "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
2492  	 	 "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
2493  	 	 );
2494  	 	 for ($y=0; $y < 7; $y++) {
2495  	 	 	 $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
2496  	 	 }
2497  	 	 return $frame;
2498  	 }
2499  
2500  	 /**
2501  	  * Return a copy of initialized frame.
2502  	  * @param int $version version
2503  	  * @return array array of unsigned char.
2504  	  */
2505  	protected function createFrame($version) {
2506  	 	 $width = $this->capacity[$version][QRCAP_WIDTH];
2507  	 	 $frameLine = str_repeat ("\0", $width);
2508  	 	 $frame = array_fill(0, $width, $frameLine);
2509  	 	 // Finder pattern
2510  	 	 $frame = $this->putFinderPattern($frame, 0, 0);
2511  	 	 $frame = $this->putFinderPattern($frame, $width - 7, 0);
2512  	 	 $frame = $this->putFinderPattern($frame, 0, $width - 7);
2513  	 	 // Separator
2514  	 	 $yOffset = $width - 7;
2515  	 	 for ($y=0; $y < 7; ++$y) {
2516  	 	 	 $frame[$y][7] = "\xc0";
2517  	 	 	 $frame[$y][$width - 8] = "\xc0";
2518  	 	 	 $frame[$yOffset][7] = "\xc0";
2519  	 	 	 ++$yOffset;
2520  	 	 }
2521  	 	 $setPattern = str_repeat("\xc0", 8);
2522  	 	 $frame = $this->qrstrset($frame, 0, 7, $setPattern);
2523  	 	 $frame = $this->qrstrset($frame, $width-8, 7, $setPattern);
2524  	 	 $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
2525  	 	 // Format info
2526  	 	 $setPattern = str_repeat("\x84", 9);
2527  	 	 $frame = $this->qrstrset($frame, 0, 8, $setPattern);
2528  	 	 $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8);
2529  	 	 $yOffset = $width - 8;
2530  	 	 for ($y=0; $y < 8; ++$y,++$yOffset) {
2531  	 	 	 $frame[$y][8] = "\x84";
2532  	 	 	 $frame[$yOffset][8] = "\x84";
2533  	 	 }
2534  	 	 // Timing pattern
2535  	 	 $wo = $width - 15;
2536  	 	 for ($i=1; $i < $wo; ++$i) {
2537  	 	 	 $frame[6][7+$i] = chr(0x90 | ($i & 1));
2538  	 	 	 $frame[7+$i][6] = chr(0x90 | ($i & 1));
2539  	 	 }
2540  	 	 // Alignment pattern
2541  	 	 $frame = $this->putAlignmentPattern($version, $frame, $width);
2542  	 	 // Version information
2543  	 	 if ($version >= 7) {
2544  	 	 	 $vinf = $this->getVersionPattern($version);
2545  	 	 	 $v = $vinf;
2546  	 	 	 for ($x=0; $x<6; ++$x) {
2547  	 	 	 	 for ($y=0; $y<3; ++$y) {
2548  	 	 	 	 	 $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
2549  	 	 	 	 	 $v = $v >> 1;
2550  	 	 	 	 }
2551  	 	 	 }
2552  	 	 	 $v = $vinf;
2553  	 	 	 for ($y=0; $y<6; ++$y) {
2554  	 	 	 	 for ($x=0; $x<3; ++$x) {
2555  	 	 	 	 	 $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
2556  	 	 	 	 	 $v = $v >> 1;
2557  	 	 	 	 }
2558  	 	 	 }
2559  	 	 }
2560  	 	 // and a little bit...
2561  	 	 $frame[$width - 8][8] = "\x81";
2562  	 	 return $frame;
2563  	 }
2564  
2565  	 /**
2566  	  * Set new frame for the specified version.
2567  	  * @param int $version version
2568  	  * @return array array of unsigned char.
2569  	  */
2570  	protected function newFrame($version) {
2571  	 	 if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) {
2572  	 	 	 return NULL;
2573  	 	 }
2574  	 	 if (!isset($this->frames[$version])) {
2575  	 	 	 $this->frames[$version] = $this->createFrame($version);
2576  	 	 }
2577  	 	 if (is_null($this->frames[$version])) {
2578  	 	 	 return NULL;
2579  	 	 }
2580  	 	 return $this->frames[$version];
2581  	 }
2582  
2583  	 /**
2584  	  * Return block number 0
2585  	  * @param array $spec
2586  	  * @return int value
2587  	  */
2588  	 protected function rsBlockNum($spec) {
2589  	 	 return ($spec[0] + $spec[3]);
2590  	 }
2591  
2592  	 /**
2593  	 * Return block number 1
2594  	  * @param array $spec
2595  	  * @return int value
2596  	  */
2597  	 protected function rsBlockNum1($spec) {
2598  	 	 return $spec[0];
2599  	 }
2600  
2601  	 /**
2602  	  * Return data codes 1
2603  	  * @param array $spec
2604  	  * @return int value
2605  	  */
2606  	 protected function rsDataCodes1($spec) {
2607  	 	 return $spec[1];
2608  	 }
2609  
2610  	 /**
2611  	  * Return ecc codes 1
2612  	  * @param array $spec
2613  	  * @return int value
2614  	  */
2615  	 protected function rsEccCodes1($spec) {
2616  	 	 return $spec[2];
2617  	 }
2618  
2619  	 /**
2620  	  * Return block number 2
2621  	  * @param array $spec
2622  	  * @return int value
2623  	  */
2624  	 protected function rsBlockNum2($spec) {
2625  	 	 return $spec[3];
2626  	 }
2627  
2628  	 /**
2629  	  * Return data codes 2
2630  	  * @param array $spec
2631  	  * @return int value
2632  	  */
2633  	 protected function rsDataCodes2($spec) {
2634  	 	 return $spec[4];
2635  	 }
2636  
2637  	 /**
2638  	  * Return ecc codes 2
2639  	  * @param array $spec
2640  	  * @return int value
2641  	  */
2642  	 protected function rsEccCodes2($spec) {
2643  	 	 return $spec[2];
2644  	 }
2645  
2646  	 /**
2647  	  * Return data length
2648  	  * @param array $spec
2649  	  * @return int value
2650  	  */
2651  	 protected function rsDataLength($spec) {
2652  	 	 return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
2653  	 }
2654  
2655  	 /**
2656  	  * Return ecc length
2657  	  * @param array $spec
2658  	  * @return int value
2659  	  */
2660  	 protected function rsEccLength($spec) {
2661  	 	 return ($spec[0] + $spec[3]) * $spec[2];
2662  	 }
2663  
2664  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
2665  
2666  	 // QRrs
2667  
2668  	 /**
2669  	  * Initialize a Reed-Solomon codec and add it to existing rsitems
2670  	  * @param int $symsize symbol size, bits
2671  	  * @param int $gfpoly  Field generator polynomial coefficients
2672  	  * @param int $fcr  first root of RS code generator polynomial, index form
2673  	  * @param int $prim  primitive element to generate polynomial roots
2674  	  * @param int $nroots RS code generator polynomial degree (number of roots)
2675  	  * @param int $pad  padding bytes at front of shortened block
2676  	  * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2677  	  */
2678  	 protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2679  	 	 foreach ($this->rsitems as $rs) {
2680  	 	 	 if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize)
2681  	 	 	 	 OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($rs['prim'] != $prim)) {
2682  	 	 	 	 continue;
2683  	 	 	 }
2684  	 	 	 return $rs;
2685  	 	 }
2686  	 	 $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);
2687  	 	 array_unshift($this->rsitems, $rs);
2688  	 	 return $rs;
2689  	 }
2690  
2691  	 // - - - - - - - - - - - - - - - - - - - - - - - - -
2692  
2693  	 // QRrsItem
2694  
2695  	 /**
2696  	  * modnn
2697  	  * @param array $rs RS values
2698  	  * @param int $x X position
2699  	  * @return int X osition
2700  	  */
2701  	 protected function modnn($rs, $x) {
2702  	 	 while ($x >= $rs['nn']) {
2703  	 	 	 $x -= $rs['nn'];
2704  	 	 	 $x = ($x >> $rs['mm']) + ($x & $rs['nn']);
2705  	 	 }
2706  	 	 return $x;
2707  	 }
2708  
2709  	 /**
2710  	  * Initialize a Reed-Solomon codec and returns an array of values.
2711  	  * @param int $symsize symbol size, bits
2712  	  * @param int $gfpoly  Field generator polynomial coefficients
2713  	  * @param int $fcr  first root of RS code generator polynomial, index form
2714  	  * @param int $prim  primitive element to generate polynomial roots
2715  	  * @param int $nroots RS code generator polynomial degree (number of roots)
2716  	  * @param int $pad  padding bytes at front of shortened block
2717  	  * @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
2718  	  */
2719  	protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
2720  	 	 // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
2721  	 	 $rs = null;
2722  	 	 // Check parameter ranges
2723  	 	 if (($symsize < 0) OR ($symsize > 8)) {
2724  	 	 	 return $rs;
2725  	 	 }
2726  	 	 if (($fcr < 0) OR ($fcr >= (1<<$symsize))) {
2727  	 	 	 return $rs;
2728  	 	 }
2729  	 	 if (($prim <= 0) OR ($prim >= (1<<$symsize))) {
2730  	 	 	 return $rs;
2731  	 	 }
2732  	 	 if (($nroots < 0) OR ($nroots >= (1<<$symsize))) {
2733  	 	 	 return $rs;
2734  	 	 }
2735  	 	 if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) {
2736  	 	 	 return $rs;
2737  	 	 }
2738  	 	 $rs = array();
2739  	 	 $rs['mm'] = $symsize;
2740  	 	 $rs['nn'] = (1 << $symsize) - 1;
2741  	 	 $rs['pad'] = $pad;
2742  	 	 $rs['alpha_to'] = array_fill(0, ($rs['nn'] + 1), 0);
2743  	 	 $rs['index_of'] = array_fill(0, ($rs['nn'] + 1), 0);
2744  	 	 // PHP style macro replacement ;)
2745  	 	 $NN =& $rs['nn'];
2746  	 	 $A0 =& $NN;
2747  	 	 // Generate Galois field lookup tables
2748  	 	 $rs['index_of'][0] = $A0; // log(zero) = -inf
2749  	 	 $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
2750  	 	 $sr = 1;
2751  	 	 for ($i=0; $i<$rs['nn']; ++$i) {
2752  	 	 	 $rs['index_of'][$sr] = $i;
2753  	 	 	 $rs['alpha_to'][$i] = $sr;
2754  	 	 	 $sr <<= 1;
2755  	 	 	 if ($sr & (1 << $symsize)) {
2756  	 	 	 	 $sr ^= $gfpoly;
2757  	 	 	 }
2758  	 	 	 $sr &= $rs['nn'];
2759  	 	 }
2760  	 	 if ($sr != 1) {
2761  	 	 	 // field generator polynomial is not primitive!
2762  	 	 	 return NULL;
2763  	 	 }
2764  	 	 // Form RS code generator polynomial from its roots
2765  	 	 $rs['genpoly'] = array_fill(0, ($nroots + 1), 0);
2766  	 	 $rs['fcr'] = $fcr;
2767  	 	 $rs['prim'] = $prim;
2768  	 	 $rs['nroots'] = $nroots;
2769  	 	 $rs['gfpoly'] = $gfpoly;
2770  	 	 // Find prim-th root of 1, used in decoding
2771  	 	 for ($iprim=1; ($iprim % $prim) != 0; $iprim += $rs['nn']) {
2772  	 	 	 ; // intentional empty-body loop!
2773  	 	 }
2774  	 	 $rs['iprim'] = (int)($iprim / $prim);
2775  	 	 $rs['genpoly'][0] = 1;
2776  	 	 for ($i = 0,$root=$fcr*$prim; $i < $nroots; $i++, $root += $prim) {
2777  	 	 	 $rs['genpoly'][$i+1] = 1;
2778  	 	 	 // Multiply rs->genpoly[] by  @**(root + x)
2779  	 	 	 for ($j = $i; $j > 0; --$j) {
2780  	 	 	 	 if ($rs['genpoly'][$j] != 0) {
2781  	 	 	 	 	 $rs['genpoly'][$j] = $rs['genpoly'][$j-1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];
2782  	 	 	 	 } else {
2783  	 	 	 	 	 $rs['genpoly'][$j] = $rs['genpoly'][$j-1];
2784  	 	 	 	 }
2785  	 	 	 }
2786  	 	 	 // rs->genpoly[0] can never be zero
2787  	 	 	 $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
2788  	 	 }
2789  	 	 // convert rs->genpoly[] to index form for quicker encoding
2790  	 	 for ($i = 0; $i <= $nroots; ++$i) {
2791  	 	 	 $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
2792  	 	 }
2793  	 	 return $rs;
2794  	 }
2795  
2796  	 /**
2797  	  * Encode a Reed-Solomon codec and returns the parity array
2798  	  * @param array $rs RS values
2799  	  * @param array $data data
2800  	  * @param array $parity parity
2801  	  * @return parity array
2802  	  */
2803  	 protected function encode_rs_char($rs, $data, $parity) {
2804  	 	 $MM       =& $rs['mm']; // bits per symbol
2805  	 	 $NN       =& $rs['nn']; // the total number of symbols in a RS block
2806  	 	 $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
2807  	 	 $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
2808  	 	 $GENPOLY  =& $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
2809  	 	 $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
2810  	 	 $FCR      =& $rs['fcr']; // first consecutive root, index form
2811  	 	 $PRIM     =& $rs['prim']; // primitive element, index form
2812  	 	 $IPRIM    =& $rs['iprim']; // prim-th root of 1, index form
2813  	 	 $PAD      =& $rs['pad']; // the number of pad symbols in a block
2814  	 	 $A0       =& $NN;
2815  	 	 $parity = array_fill(0, $NROOTS, 0);
2816  	 	 for ($i=0; $i < ($NN - $NROOTS - $PAD); $i++) {
2817  	 	 	 $feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
2818  	 	 	 if ($feedback != $A0) {
2819  	 	 	 	 // feedback term is non-zero
2820  	 	 	 	 // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
2821  	 	 	 	 // always be for the polynomials constructed by init_rs()
2822  	 	 	 	 $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
2823  	 	 	 	 for ($j=1; $j < $NROOTS; ++$j) {
2824  	 	 	 	 $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
2825  	 	 	 	 }
2826  	 	 	 }
2827  	 	 	 // Shift
2828  	 	 	 array_shift($parity);
2829  	 	 	 if ($feedback != $A0) {
2830  	 	 	 	 array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]);
2831  	 	 	 } else {
2832  	 	 	 	 array_push($parity, 0);
2833  	 	 	 }
2834  	 	 }
2835  	 	 return $parity;
2836  	 }
2837  
2838  } // end QRcode class
2839  
2840  //============================================================+
2841  // END OF FILE
2842  //============================================================+