. // // See LICENSE.TXT file for more information. // ------------------------------------------------------------------- // // DESCRIPTION : // // Class to create QR-code arrays for TCPDF class. // QR Code symbol is a 2D barcode that can be scanned by // handy terminals such as a mobile phone with CCD. // The capacity of QR Code is up to 7000 digits or 4000 // characters, and has high robustness. // This class supports QR Code model 2, described in // JIS (Japanese Industrial Standards) X0510:2004 // or ISO/IEC 18004. // Currently the following features are not supported: // ECI and FNC1 mode, Micro QR Code, QR Code model 1, // Structured mode. // // This class is derived from the following projects: // --------------------------------------------------------- // "PHP QR Code encoder" // License: GNU-LGPLv3 // Copyright (C) 2010 by Dominik Dzienia // http://phpqrcode.sourceforge.net/ // https://sourceforge.net/projects/phpqrcode/ // // The "PHP QR Code encoder" is based on // "C libqrencode library" (ver. 3.1.1) // License: GNU-LGPL 2.1 // Copyright (C) 2006-2010 by Kentaro Fukuchi // http://megaui.net/fukuchi/works/qrencode/index.en.html // // Reed-Solomon code encoder is written by Phil Karn, KA9Q. // Copyright (C) 2002-2006 Phil Karn, KA9Q // // QR Code is registered trademark of DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/index-e.html // --------------------------------------------------------- //============================================================+ /** * @file * Class to create QR-code arrays for TCPDF class. * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD. * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode. * * 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). * Please read comments on this class source file for full copyright and license information. * * @package com.tecnick.tcpdf * @author Nicola Asuni * @version 1.0.010 */ // definitions if (!\defined('QRCODEDEFS')) { /** * Indicate that definitions for this class are set */ \define('QRCODEDEFS', true); // ----------------------------------------------------- // Encoding modes (characters which can be encoded in QRcode) /** * Encoding mode */ \define('QR_MODE_NL', -1); /** * Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode. */ \define('QR_MODE_NM', 0); /** * 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. */ \define('QR_MODE_AN', 1); /** * Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode. */ \define('QR_MODE_8B', 2); /** * 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. */ \define('QR_MODE_KJ', 3); /** * Encoding mode STRUCTURED (currently unsupported) */ \define('QR_MODE_ST', 4); // ----------------------------------------------------- // Levels of error correction. // QRcode has a function of an error correcting for miss reading that white is black. // Error correcting is defined in 4 level as below. /** * Error correction level L : About 7% or less errors can be corrected. */ \define('QR_ECLEVEL_L', 0); /** * Error correction level M : About 15% or less errors can be corrected. */ \define('QR_ECLEVEL_M', 1); /** * Error correction level Q : About 25% or less errors can be corrected. */ \define('QR_ECLEVEL_Q', 2); /** * Error correction level H : About 30% or less errors can be corrected. */ \define('QR_ECLEVEL_H', 3); // ----------------------------------------------------- // 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. /** * Maximum QR Code version. */ \define('QRSPEC_VERSION_MAX', 40); /** * Maximum matrix size for maximum version (version 40 is 177*177 matrix). */ \define('QRSPEC_WIDTH_MAX', 177); // ----------------------------------------------------- /** * Matrix index to get width from $capacity array. */ \define('QRCAP_WIDTH', 0); /** * Matrix index to get number of words from $capacity array. */ \define('QRCAP_WORDS', 1); /** * Matrix index to get remainder from $capacity array. */ \define('QRCAP_REMINDER', 2); /** * Matrix index to get error correction level from $capacity array. */ \define('QRCAP_EC', 3); // ----------------------------------------------------- // Structure (currently usupported) /** * Number of header bits for structured mode */ \define('STRUCTURE_HEADER_BITS', 20); /** * Max number of symbols for structured mode */ \define('MAX_STRUCTURED_SYMBOLS', 16); // ----------------------------------------------------- // Masks /** * Down point base value for case 1 mask pattern (concatenation of same color in a line or a column) */ \define('N1', 3); /** * Down point base value for case 2 mask pattern (module block of same color) */ \define('N2', 3); /** * 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) */ \define('N3', 40); /** * Down point base value for case 4 mask pattern (ration of dark modules in whole) */ \define('N4', 10); // ----------------------------------------------------- // Optimization settings /** * if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code */ \define('QR_FIND_BEST_MASK', true); /** * if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly */ \define('QR_FIND_FROM_RANDOM', 2); /** * when QR_FIND_BEST_MASK === false */ \define('QR_DEFAULT_MASK', 2); // ----------------------------------------------------- } // end of definitions /** * @class QRcode * Class to create QR-code arrays for TCPDF class. * QR Code symbol is a 2D barcode that can be scanned by handy terminals such as a mobile phone with CCD. * The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. * This class supports QR Code model 2, described in JIS (Japanese Industrial Standards) X0510:2004 or ISO/IEC 18004. * Currently the following features are not supported: ECI and FNC1 mode, Micro QR Code, QR Code model 1, Structured mode. * * 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). * Please read comments on this class source file for full copyright and license information. * * @package com.tecnick.tcpdf * @author Nicola Asuni * @version 1.0.010 */ class QRcode { /** * Barcode array to be returned which is readable by TCPDF. * @protected */ protected $barcode_array = []; /** * 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. * @protected */ protected $version = 0; /** * Levels of error correction. See definitions for possible values. * @protected */ protected $level = QR_ECLEVEL_L; /** * Encoding mode. * @protected */ protected $hint = QR_MODE_8B; /** * Boolean flag, if true the input string will be converted to uppercase. * @protected */ protected $casesensitive = true; /** * Structured QR code (not supported yet). * @protected */ protected $structured = 0; /** * Mask data. * @protected */ protected $data; // FrameFiller /** * Width. * @protected */ protected $width; /** * Frame. * @protected */ protected $frame; /** * X position of bit. * @protected */ protected $x; /** * Y position of bit. * @protected */ protected $y; /** * Direction. * @protected */ protected $dir; /** * Single bit value. * @protected */ protected $bit; // ---- QRrawcode ---- /** * Data code. * @protected */ protected $datacode = []; /** * Error correction code. * @protected */ protected $ecccode = []; /** * Blocks. * @protected */ protected $blocks; /** * Reed-Solomon blocks. * @protected */ protected $rsblocks = []; //of RSblock /** * Counter. * @protected */ protected $count; /** * Data length. * @protected */ protected $dataLength; /** * Error correction length. * @protected */ protected $eccLength; /** * Value b1. * @protected */ protected $b1; // ---- QRmask ---- /** * Run length. * @protected */ protected $runLength = []; // ---- QRsplit ---- /** * Input data string. * @protected */ protected $dataStr = ''; /** * Input items. * @protected */ protected $items; // Reed-Solomon items /** * Reed-Solomon items. * @protected */ protected $rsitems = []; /** * Array of frames. * @protected */ protected $frames = []; /** * Alphabet-numeric convesion table. * @protected */ protected $anTable = [ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, ]; /** * Array Table of the capacity of symbols. * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004. * @protected */ protected $capacity = [ [0, 0, 0, [0, 0, 0, 0]], [21, 26, 0, [7, 10, 13, 17]], // 1 [25, 44, 7, [10, 16, 22, 28]], [29, 70, 7, [15, 26, 36, 44]], [33, 100, 7, [20, 36, 52, 64]], [37, 134, 7, [26, 48, 72, 88]], // 5 [41, 172, 7, [36, 64, 96, 112]], [45, 196, 0, [40, 72, 108, 130]], [49, 242, 0, [48, 88, 132, 156]], [53, 292, 0, [60, 110, 160, 192]], [57, 346, 0, [72, 130, 192, 224]], // 10 [61, 404, 0, [80, 150, 224, 264]], [65, 466, 0, [96, 176, 260, 308]], [69, 532, 0, [104, 198, 288, 352]], [73, 581, 3, [120, 216, 320, 384]], [77, 655, 3, [132, 240, 360, 432]], // 15 [81, 733, 3, [144, 280, 408, 480]], [85, 815, 3, [168, 308, 448, 532]], [89, 901, 3, [180, 338, 504, 588]], [93, 991, 3, [196, 364, 546, 650]], [97, 1085, 3, [224, 416, 600, 700]], // 20 [101, 1156, 4, [224, 442, 644, 750]], [105, 1258, 4, [252, 476, 690, 816]], [109, 1364, 4, [270, 504, 750, 900]], [113, 1474, 4, [300, 560, 810, 960]], [117, 1588, 4, [312, 588, 870, 1050]], // 25 [121, 1706, 4, [336, 644, 952, 1110]], [125, 1828, 4, [360, 700, 1020, 1200]], [129, 1921, 3, [390, 728, 1050, 1260]], [133, 2051, 3, [420, 784, 1140, 1350]], [137, 2185, 3, [450, 812, 1200, 1440]], // 30 [141, 2323, 3, [480, 868, 1290, 1530]], [145, 2465, 3, [510, 924, 1350, 1620]], [149, 2611, 3, [540, 980, 1440, 1710]], [153, 2761, 3, [570, 1036, 1530, 1800]], [157, 2876, 0, [570, 1064, 1590, 1890]], // 35 [161, 3034, 0, [600, 1120, 1680, 1980]], [165, 3196, 0, [630, 1204, 1770, 2100]], [169, 3362, 0, [660, 1260, 1860, 2220]], [173, 3532, 0, [720, 1316, 1950, 2310]], [177, 3706, 0, [750, 1372, 2040, 2430]], // 40 ]; /** * Array Length indicator. * @protected */ protected $lengthTableBits = [ [10, 12, 14], [9, 11, 13], [8, 16, 16], [8, 10, 12], ]; /** * Array Table of the error correction code (Reed-Solomon block). * See Table 12-16 (pp.30-36), JIS X0510:2004. * @protected */ protected $eccTable = [ [[0, 0], [0, 0], [0, 0], [0, 0]], [[1, 0], [1, 0], [1, 0], [1, 0]], // 1 [[1, 0], [1, 0], [1, 0], [1, 0]], [[1, 0], [1, 0], [2, 0], [2, 0]], [[1, 0], [2, 0], [2, 0], [4, 0]], [[1, 0], [2, 0], [2, 2], [2, 2]], // 5 [[2, 0], [4, 0], [4, 0], [4, 0]], [[2, 0], [4, 0], [2, 4], [4, 1]], [[2, 0], [2, 2], [4, 2], [4, 2]], [[2, 0], [3, 2], [4, 4], [4, 4]], [[2, 2], [4, 1], [6, 2], [6, 2]], // 10 [[4, 0], [1, 4], [4, 4], [3, 8]], [[2, 2], [6, 2], [4, 6], [7, 4]], [[4, 0], [8, 1], [8, 4], [12, 4]], [[3, 1], [4, 5], [11, 5], [11, 5]], [[5, 1], [5, 5], [5, 7], [11, 7]], // 15 [[5, 1], [7, 3], [15, 2], [3, 13]], [[1, 5], [10, 1], [1, 15], [2, 17]], [[5, 1], [9, 4], [17, 1], [2, 19]], [[3, 4], [3, 11], [17, 4], [9, 16]], [[3, 5], [3, 13], [15, 5], [15, 10]], // 20 [[4, 4], [17, 0], [17, 6], [19, 6]], [[2, 7], [17, 0], [7, 16], [34, 0]], [[4, 5], [4, 14], [11, 14], [16, 14]], [[6, 4], [6, 14], [11, 16], [30, 2]], [[8, 4], [8, 13], [7, 22], [22, 13]], // 25 [[10, 2], [19, 4], [28, 6], [33, 4]], [[8, 4], [22, 3], [8, 26], [12, 28]], [[3, 10], [3, 23], [4, 31], [11, 31]], [[7, 7], [21, 7], [1, 37], [19, 26]], [[5, 10], [19, 10], [15, 25], [23, 25]], // 30 [[13, 3], [2, 29], [42, 1], [23, 28]], [[17, 0], [10, 23], [10, 35], [19, 35]], [[17, 1], [14, 21], [29, 19], [11, 46]], [[13, 6], [14, 23], [44, 7], [59, 1]], [[12, 7], [12, 26], [39, 14], [22, 41]], // 35 [[6, 14], [6, 34], [46, 10], [2, 64]], [[17, 4], [29, 14], [49, 10], [24, 46]], [[4, 18], [13, 32], [48, 14], [42, 32]], [[20, 4], [40, 7], [43, 22], [10, 67]], [[19, 6], [18, 31], [34, 34], [20, 61]], // 40 ]; /** * Array Positions of alignment patterns. * 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. * See Table 1 in Appendix E (pp.71) of JIS X0510:2004. * @protected */ protected $alignmentPattern = [ [0, 0], [0, 0], [18, 0], [22, 0], [26, 0], [30, 0], // 1- 5 [34, 0], [22, 38], [24, 42], [26, 46], [28, 50], // 6-10 [30, 54], [32, 58], [34, 62], [26, 46], [26, 48], // 11-15 [26, 50], [30, 54], [30, 56], [30, 58], [34, 62], // 16-20 [28, 50], [26, 50], [30, 54], [28, 54], [32, 58], // 21-25 [30, 58], [34, 62], [26, 50], [30, 54], [26, 52], // 26-30 [30, 56], [34, 60], [30, 58], [34, 62], [30, 54], // 31-35 [24, 50], [28, 54], [32, 58], [26, 54], [30, 58], // 35-40 ]; /** * Array Version information pattern (BCH coded). * See Table 1 in Appendix D (pp.68) of JIS X0510:2004. * size: [QRSPEC_VERSION_MAX - 6] * @protected */ protected $versionPattern = [ 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d, 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9, 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75, 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64, 0x27541, 0x28c69, ]; /** * Array Format information * @protected */ protected $formatInfo = [ [0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976], [0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0], [0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed], [0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b], ]; // ------------------------------------------------- // ------------------------------------------------- /** * This is the class constructor. * Creates a QRcode object * @param string $code code to represent using QRcode * @param string $eclevel error level: * @public * @since 1.0.000 */ public function __construct($code, $eclevel = 'L') { $barcode_array = []; if (($code === null) || ($code == '\0') || ($code == '')) { return false; } // set error correction level $this->level = \array_search($eclevel, ['L', 'M', 'Q', 'H']); if ($this->level === false) { $this->level = QR_ECLEVEL_L; } if (($this->hint != QR_MODE_8B) && ($this->hint != QR_MODE_KJ)) { return false; } if (($this->version < 0) || ($this->version > QRSPEC_VERSION_MAX)) { return false; } $this->items = []; $this->encodeString($code); if ($this->data === null) { return false; } $qrTab = $this->binarize($this->data); $size = \count($qrTab); $barcode_array['num_rows'] = $size; $barcode_array['num_cols'] = $size; $barcode_array['bcode'] = []; foreach ($qrTab as $line) { $arrAdd = []; foreach (\str_split($line) as $char) { $arrAdd[] = ($char == '1')?1:0; } $barcode_array['bcode'][] = $arrAdd; } $this->barcode_array = $barcode_array; } /** * Returns a barcode array which is readable by TCPDF * @return array barcode array readable by TCPDF; * @public */ public function getBarcodeArray() { return $this->barcode_array; } /** * Convert the frame in binary form * @param array $frame array to binarize * @return array frame in binary form */ protected function binarize($frame) { $len = \count($frame); // the frame is square (width = height) foreach ($frame as &$frameLine) { for ($i = 0; $i < $len; ++$i) { $frameLine[$i] = (\ord($frameLine[$i]) & 1)?'1':'0'; } } return $frame; } /** * Encode the input string to QR code * @param string $string input string to encode */ protected function encodeString($string) { $this->dataStr = $string; if (!$this->casesensitive) { $this->toUpper(); } $ret = $this->splitString(); if ($ret < 0) { return null; } $this->encodeMask(-1); } /** * Encode mask * @param int $mask masking mode */ protected function encodeMask($mask) { $spec = [0, 0, 0, 0, 0]; $this->datacode = $this->getByteStream($this->items); if ($this->datacode === null) { return null; } $spec = $this->getEccSpec($this->version, $this->level, $spec); $this->b1 = $this->rsBlockNum1($spec); $this->dataLength = $this->rsDataLength($spec); $this->eccLength = $this->rsEccLength($spec); $this->ecccode = \array_fill(0, $this->eccLength, 0); $this->blocks = $this->rsBlockNum($spec); $ret = $this->init($spec); if ($ret < 0) { return null; } $this->count = 0; $this->width = $this->getWidth($this->version); $this->frame = $this->newFrame($this->version); $this->x = $this->width - 1; $this->y = $this->width - 1; $this->dir = -1; $this->bit = -1; // inteleaved data and ecc codes for ($i = 0; $i < ($this->dataLength + $this->eccLength); ++$i) { $code = $this->getCode(); $bit = 0x80; for ($j = 0; $j < 8; ++$j) { $addr = $this->getNextPosition(); $this->setFrameAt($addr, 0x02 | (($bit & $code) != 0)); $bit = $bit >> 1; } } // remainder bits $j = $this->getRemainder($this->version); for ($i = 0; $i < $j; ++$i) { $addr = $this->getNextPosition(); $this->setFrameAt($addr, 0x02); } // masking $this->runLength = \array_fill(0, QRSPEC_WIDTH_MAX + 1, 0); if ($mask < 0) { if (QR_FIND_BEST_MASK) { $masked = $this->mask($this->width, $this->frame, $this->level); } else { $masked = $this->makeMask($this->width, $this->frame, ((int) QR_DEFAULT_MASK % 8), $this->level); } } else { $masked = $this->makeMask($this->width, $this->frame, $mask, $this->level); } if ($masked == null) { return null; } $this->data = $masked; } // - - - - - - - - - - - - - - - - - - - - - - - - - // FrameFiller /** * Set frame value at specified position * @param array $at x,y position * @param int $val value of the character to set */ protected function setFrameAt($at, $val) : void { $this->frame[$at['y']][$at['x']] = \chr($val); } /** * Get frame value at specified position * @param array $at x,y position * @return value at specified position */ protected function getFrameAt($at) { return \ord($this->frame[$at['y']][$at['x']]); } /** * Return the next frame position * @return array of x,y coordinates */ protected function getNextPosition() { do { if ($this->bit == -1) { $this->bit = 0; return ['x' => $this->x, 'y' => $this->y]; } $x = $this->x; $y = $this->y; $w = $this->width; if ($this->bit == 0) { --$x; ++$this->bit; } else { ++$x; $y += $this->dir; --$this->bit; } if ($this->dir < 0) { if ($y < 0) { $y = 0; $x -= 2; $this->dir = 1; if ($x == 6) { --$x; $y = 9; } } } else { if ($y == $w) { $y = $w - 1; $x -= 2; $this->dir = -1; if ($x == 6) { --$x; $y -= 8; } } } if (($x < 0) || ($y < 0)) { return null; } $this->x = $x; $this->y = $y; } while(\ord($this->frame[$y][$x]) & 0x80); return ['x' => $x, 'y' => $y]; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRrawcode /** * Initialize code. * @param array $spec array of ECC specification * @return int 0 in case of success, -1 in case of error */ protected function init($spec) { $dl = $this->rsDataCodes1($spec); $el = $this->rsEccCodes1($spec); $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el); $blockNo = 0; $dataPos = 0; $eccPos = 0; $endfor = $this->rsBlockNum1($spec); for ($i = 0; $i < $endfor; ++$i) { $ecc = \array_slice($this->ecccode, $eccPos); $this->rsblocks[$blockNo] = []; $this->rsblocks[$blockNo]['dataLength'] = $dl; $this->rsblocks[$blockNo]['data'] = \array_slice($this->datacode, $dataPos); $this->rsblocks[$blockNo]['eccLength'] = $el; $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc); $this->rsblocks[$blockNo]['ecc'] = $ecc; $this->ecccode = \array_merge(\array_slice($this->ecccode,0, $eccPos), $ecc); $dataPos += $dl; $eccPos += $el; ++$blockNo; } if ($this->rsBlockNum2($spec) == 0) { return 0; } $dl = $this->rsDataCodes2($spec); $el = $this->rsEccCodes2($spec); $rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el); if ($rs == null) { return -1; } $endfor = $this->rsBlockNum2($spec); for ($i = 0; $i < $endfor; ++$i) { $ecc = \array_slice($this->ecccode, $eccPos); $this->rsblocks[$blockNo] = []; $this->rsblocks[$blockNo]['dataLength'] = $dl; $this->rsblocks[$blockNo]['data'] = \array_slice($this->datacode, $dataPos); $this->rsblocks[$blockNo]['eccLength'] = $el; $ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc); $this->rsblocks[$blockNo]['ecc'] = $ecc; $this->ecccode = \array_merge(\array_slice($this->ecccode, 0, $eccPos), $ecc); $dataPos += $dl; $eccPos += $el; ++$blockNo; } return 0; } /** * Return Reed-Solomon block code. * @return array rsblocks */ protected function getCode() { if ($this->count < $this->dataLength) { $row = $this->count % $this->blocks; $col = $this->count / $this->blocks; if ($col >= $this->rsblocks[0]['dataLength']) { $row += $this->b1; } $ret = $this->rsblocks[$row]['data'][$col]; } elseif ($this->count < $this->dataLength + $this->eccLength) { $row = ($this->count - $this->dataLength) % $this->blocks; $col = ($this->count - $this->dataLength) / $this->blocks; $ret = $this->rsblocks[$row]['ecc'][$col]; } else { return 0; } ++$this->count; return $ret; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRmask /** * Write Format Information on frame and returns the number of black bits * @param int $width frame width * @param array $frame frame * @param array $mask masking mode * @param int $level error correction level * @return int blacks */ protected function writeFormatInformation($width, &$frame, $mask, $level) { $blacks = 0; $format = $this->getFormatInfo($mask, $level); for ($i = 0; $i < 8; ++$i) { if ($format & 1) { $blacks += 2; $v = 0x85; } else { $v = 0x84; } $frame[8][$width - 1 - $i] = \chr($v); if ($i < 6) { $frame[$i][8] = \chr($v); } else { $frame[$i + 1][8] = \chr($v); } $format = $format >> 1; } for ($i = 0; $i < 7; ++$i) { if ($format & 1) { $blacks += 2; $v = 0x85; } else { $v = 0x84; } $frame[$width - 7 + $i][8] = \chr($v); if ($i == 0) { $frame[8][7] = \chr($v); } else { $frame[8][6 - $i] = \chr($v); } $format = $format >> 1; } return $blacks; } /** * mask0 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask0($x, $y) { return ($x + $y) & 1; } /** * mask1 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask1($x, $y) { return ($y & 1); } /** * mask2 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask2($x, $y) { return ($x % 3); } /** * mask3 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask3($x, $y) { return ($x + $y) % 3; } /** * mask4 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask4($x, $y) { return (((int) ($y / 2)) + ((int) ($x / 3))) & 1; } /** * mask5 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask5($x, $y) { return (($x * $y) & 1) + ($x * $y) % 3; } /** * mask6 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask6($x, $y) { return ((($x * $y) & 1) + ($x * $y) % 3) & 1; } /** * mask7 * @param int $x X position * @param int $y Y position * @return int mask */ protected function mask7($x, $y) { return ((($x * $y) % 3) + (($x + $y) & 1)) & 1; } /** * Return bitmask * @param int $maskNo mask number * @param int $width width * @param array $frame frame * @return array bitmask */ protected function generateMaskNo($maskNo, $width, $frame) { $bitMask = \array_fill(0, $width, \array_fill(0, $width, 0)); for ($y = 0; $y < $width; ++$y) { for ($x = 0; $x < $width; ++$x) { if (\ord($frame[$y][$x]) & 0x80) { $bitMask[$y][$x] = 0; } else { $maskFunc = \call_user_func([$this, 'mask'.$maskNo], $x, $y); $bitMask[$y][$x] = ($maskFunc == 0)?1:0; } } } return $bitMask; } /** * makeMaskNo * @param int $maskNo * @param int $width * @param int $s * @param int $d * @param bool $maskGenOnly * @return int b */ protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly = false) { $b = 0; $bitMask = []; $bitMask = $this->generateMaskNo($maskNo, $width, $s, $d); if ($maskGenOnly) { return; } $d = $s; for ($y = 0; $y < $width; ++$y) { for ($x = 0; $x < $width; ++$x) { if ($bitMask[$y][$x] == 1) { $d[$y][$x] = \chr(\ord($s[$y][$x]) ^ ((int) ($bitMask[$y][$x]))); } $b += (int) (\ord($d[$y][$x]) & 1); } } return $b; } /** * makeMask * @param int $width * @param array $frame * @param int $maskNo * @param int $level * @return array mask */ protected function makeMask($width, $frame, $maskNo, $level) { $masked = \array_fill(0, $width, \str_repeat("\0", $width)); $this->makeMaskNo($maskNo, $width, $frame, $masked); $this->writeFormatInformation($width, $masked, $maskNo, $level); return $masked; } /** * calcN1N3 * @param int $length * @return int demerit */ protected function calcN1N3($length) { $demerit = 0; for ($i = 0; $i < $length; ++$i) { if ($this->runLength[$i] >= 5) { $demerit += (N1 + ($this->runLength[$i] - 5)); } if ($i & 1) { if (($i >= 3) && ($i < ($length - 2)) && ($this->runLength[$i] % 3 == 0)) { $fact = (int) ($this->runLength[$i] / 3); if (($this->runLength[$i - 2] == $fact) && ($this->runLength[$i - 1] == $fact) && ($this->runLength[$i + 1] == $fact) && ($this->runLength[$i + 2] == $fact)) { if (($this->runLength[$i - 3] < 0) || ($this->runLength[$i - 3] >= (4 * $fact))) { $demerit += N3; } elseif ((($i + 3) >= $length) || ($this->runLength[$i + 3] >= (4 * $fact))) { $demerit += N3; } } } } } return $demerit; } /** * evaluateSymbol * @param int $width * @param array $frame * @return int demerit */ protected function evaluateSymbol($width, $frame) { $head = 0; $demerit = 0; for ($y = 0; $y < $width; ++$y) { $head = 0; $this->runLength[0] = 1; $frameY = $frame[$y]; if ($y > 0) { $frameYM = $frame[$y - 1]; } for ($x = 0; $x < $width; ++$x) { if (($x > 0) && ($y > 0)) { $b22 = \ord($frameY[$x]) & \ord($frameY[$x - 1]) & \ord($frameYM[$x]) & \ord($frameYM[$x - 1]); $w22 = \ord($frameY[$x]) | \ord($frameY[$x - 1]) | \ord($frameYM[$x]) | \ord($frameYM[$x - 1]); if (($b22 | ($w22 ^ 1)) & 1) { $demerit += N2; } } if (($x == 0) && (\ord($frameY[$x]) & 1)) { $this->runLength[0] = -1; $head = 1; $this->runLength[$head] = 1; } elseif ($x > 0) { if ((\ord($frameY[$x]) ^ \ord($frameY[$x - 1])) & 1) { ++$head; $this->runLength[$head] = 1; } else { ++$this->runLength[$head]; } } } $demerit += $this->calcN1N3($head + 1); } for ($x = 0; $x < $width; ++$x) { $head = 0; $this->runLength[0] = 1; for ($y = 0; $y < $width; ++$y) { if (($y == 0) && (\ord($frame[$y][$x]) & 1)) { $this->runLength[0] = -1; $head = 1; $this->runLength[$head] = 1; } elseif ($y > 0) { if ((\ord($frame[$y][$x]) ^ \ord($frame[$y - 1][$x])) & 1) { ++$head; $this->runLength[$head] = 1; } else { ++$this->runLength[$head]; } } } $demerit += $this->calcN1N3($head + 1); } return $demerit; } /** * mask * @param int $width * @param array $frame * @param int $level * @return array best mask */ protected function mask($width, $frame, $level) { $minDemerit = \PHP_INT_MAX; $bestMaskNum = 0; $bestMask = []; $checked_masks = [0, 1, 2, 3, 4, 5, 6, 7]; if (QR_FIND_FROM_RANDOM !== false) { $howManuOut = 8 - (QR_FIND_FROM_RANDOM % 9); for ($i = 0; $i < $howManuOut; ++$i) { $remPos = \mt_rand(0, \count($checked_masks) - 1); unset($checked_masks[$remPos]); $checked_masks = \array_values($checked_masks); } } $bestMask = $frame; foreach ($checked_masks as $i) { $mask = \array_fill(0, $width, \str_repeat("\0", $width)); $demerit = 0; $blacks = 0; $blacks = $this->makeMaskNo($i, $width, $frame, $mask); $blacks += $this->writeFormatInformation($width, $mask, $i, $level); $blacks = (int) (100 * $blacks / ($width * $width)); $demerit = (int) ((int) (\abs($blacks - 50) / 5) * N4); $demerit += $this->evaluateSymbol($width, $mask); if ($demerit < $minDemerit) { $minDemerit = $demerit; $bestMask = $mask; $bestMaskNum = $i; } } return $bestMask; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRsplit /** * Return true if the character at specified position is a number * @param string $str string * @param int $pos characted position * @return bool true of false */ protected function isdigitat($str, $pos) { if ($pos >= \strlen($str)) { return false; } return ((\ord($str[$pos]) >= \ord('0')) && (\ord($str[$pos]) <= \ord('9'))); } /** * Return true if the character at specified position is an alphanumeric character * @param string $str string * @param int $pos characted position * @return bool true of false */ protected function isalnumat($str, $pos) { if ($pos >= \strlen($str)) { return false; } return ($this->lookAnTable(\ord($str[$pos])) >= 0); } /** * identifyMode * @param int $pos * @return int mode */ protected function identifyMode($pos) { if ($pos >= \strlen($this->dataStr)) { return QR_MODE_NL; } $c = $this->dataStr[$pos]; if ($this->isdigitat($this->dataStr, $pos)) { return QR_MODE_NM; } elseif ($this->isalnumat($this->dataStr, $pos)) { return QR_MODE_AN; } elseif ($this->hint == QR_MODE_KJ) { if ($pos + 1 < \strlen($this->dataStr)) { $d = $this->dataStr[$pos + 1]; $word = (\ord($c) << 8) | \ord($d); if (($word >= 0x8140 && $word <= 0x9ffc) || ($word >= 0xe040 && $word <= 0xebbf)) { return QR_MODE_KJ; } } } return QR_MODE_8B; } /** * eatNum * @return int run */ protected function eatNum() { $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); $p = 0; while($this->isdigitat($this->dataStr, $p)) { ++$p; } $run = $p; $mode = $this->identifyMode($p); if ($mode == QR_MODE_8B) { $dif = $this->estimateBitsModeNum($run) + 4 + $ln + $this->estimateBitsMode8(1) // + 4 + l8 - $this->estimateBitsMode8($run + 1); // - 4 - l8 if ($dif > 0) { return $this->eat8(); } } if ($mode == QR_MODE_AN) { $dif = $this->estimateBitsModeNum($run) + 4 + $ln + $this->estimateBitsModeAn(1) // + 4 + la - $this->estimateBitsModeAn($run + 1);// - 4 - la if ($dif > 0) { return $this->eatAn(); } } $this->items = $this->appendNewInputItem($this->items, QR_MODE_NM, $run, \str_split($this->dataStr)); return $run; } /** * eatAn * @return int run */ protected function eatAn() { $la = $this->lengthIndicator(QR_MODE_AN, $this->version); $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); $p = 1; while($this->isalnumat($this->dataStr, $p)) { if ($this->isdigitat($this->dataStr, $p)) { $q = $p; while($this->isdigitat($this->dataStr, $q)) { ++$q; } $dif = $this->estimateBitsModeAn($p) // + 4 + la + $this->estimateBitsModeNum($q - $p) + 4 + $ln - $this->estimateBitsModeAn($q); // - 4 - la if ($dif < 0) { break; } else { $p = $q; } } else { ++$p; } } $run = $p; if (!$this->isalnumat($this->dataStr, $p)) { $dif = $this->estimateBitsModeAn($run) + 4 + $la + $this->estimateBitsMode8(1) // + 4 + l8 - $this->estimateBitsMode8($run + 1); // - 4 - l8 if ($dif > 0) { return $this->eat8(); } } $this->items = $this->appendNewInputItem($this->items, QR_MODE_AN, $run, \str_split($this->dataStr)); return $run; } /** * eatKanji * @return int run */ protected function eatKanji() { $p = 0; while($this->identifyMode($p) == QR_MODE_KJ) { $p += 2; } $this->items = $this->appendNewInputItem($this->items, QR_MODE_KJ, $p, \str_split($this->dataStr)); $run = $p; return $run; } /** * eat8 * @return int run */ protected function eat8() { $la = $this->lengthIndicator(QR_MODE_AN, $this->version); $ln = $this->lengthIndicator(QR_MODE_NM, $this->version); $p = 1; $dataStrLen = \strlen($this->dataStr); while($p < $dataStrLen) { $mode = $this->identifyMode($p); if ($mode == QR_MODE_KJ) { break; } if ($mode == QR_MODE_NM) { $q = $p; while($this->isdigitat($this->dataStr, $q)) { ++$q; } $dif = $this->estimateBitsMode8($p) // + 4 + l8 + $this->estimateBitsModeNum($q - $p) + 4 + $ln - $this->estimateBitsMode8($q); // - 4 - l8 if ($dif < 0) { break; } else { $p = $q; } } elseif ($mode == QR_MODE_AN) { $q = $p; while($this->isalnumat($this->dataStr, $q)) { ++$q; } $dif = $this->estimateBitsMode8($p) // + 4 + l8 + $this->estimateBitsModeAn($q - $p) + 4 + $la - $this->estimateBitsMode8($q); // - 4 - l8 if ($dif < 0) { break; } else { $p = $q; } } else { ++$p; } } $run = $p; $this->items = $this->appendNewInputItem($this->items, QR_MODE_8B, $run, \str_split($this->dataStr)); return $run; } /** * splitString * @return int */ protected function splitString() { while (\strlen($this->dataStr) > 0) { $mode = $this->identifyMode(0); switch ($mode) { case QR_MODE_NM: { $length = $this->eatNum(); break; } case QR_MODE_AN: { $length = $this->eatAn(); break; } case QR_MODE_KJ: { if ($this->hint == QR_MODE_KJ) { $length = $this->eatKanji(); } else { $length = $this->eat8(); } break; } default: { $length = $this->eat8(); break; } } if ($length == 0) { return 0; } if ($length < 0) { return -1; } $this->dataStr = \substr($this->dataStr, $length); } return 0; } /** * toUpper */ protected function toUpper() { $stringLen = \strlen($this->dataStr); $p = 0; while ($p < $stringLen) { $mode = $this->identifyMode(\substr($this->dataStr, $p), $this->hint); if ($mode == QR_MODE_KJ) { $p += 2; } else { if ((\ord($this->dataStr[$p]) >= \ord('a')) && (\ord($this->dataStr[$p]) <= \ord('z'))) { $this->dataStr[$p] = \chr(\ord($this->dataStr[$p]) - 32); } ++$p; } } return $this->dataStr; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRinputItem /** * newInputItem * @param int $mode * @param int $size * @param array $data * @param array $bstream * @return array input item */ protected function newInputItem($mode, $size, $data, $bstream = null) { $setData = \array_slice($data, 0, $size); if (\count($setData) < $size) { $setData = \array_merge($setData, \array_fill(0, ($size - \count($setData)), 0)); } if (!$this->check($mode, $size, $setData)) { return null; } $inputitem = []; $inputitem['mode'] = $mode; $inputitem['size'] = $size; $inputitem['data'] = $setData; $inputitem['bstream'] = $bstream; return $inputitem; } /** * encodeModeNum * @param array $inputitem * @param int $version * @return array input item */ protected function encodeModeNum($inputitem, $version) { $words = (int) ($inputitem['size'] / 3); $inputitem['bstream'] = []; $val = 0x1; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_NM, $version), $inputitem['size']); for ($i = 0; $i < $words; ++$i) { $val = (\ord($inputitem['data'][$i * 3 ]) - \ord('0')) * 100; $val += (\ord($inputitem['data'][$i * 3 + 1]) - \ord('0')) * 10; $val += (\ord($inputitem['data'][$i * 3 + 2]) - \ord('0')); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val); } if ($inputitem['size'] - $words * 3 == 1) { $val = \ord($inputitem['data'][$words * 3]) - \ord('0'); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val); } elseif (($inputitem['size'] - ($words * 3)) == 2) { $val = (\ord($inputitem['data'][$words * 3 ]) - \ord('0')) * 10; $val += (\ord($inputitem['data'][$words * 3 + 1]) - \ord('0')); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val); } return $inputitem; } /** * encodeModeAn * @param array $inputitem * @param int $version * @return array input item */ protected function encodeModeAn($inputitem, $version) { $words = (int) ($inputitem['size'] / 2); $inputitem['bstream'] = []; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_AN, $version), $inputitem['size']); for ($i = 0; $i < $words; ++$i) { $val = (int) ($this->lookAnTable(\ord($inputitem['data'][$i * 2])) * 45); $val += (int) ($this->lookAnTable(\ord($inputitem['data'][($i * 2) + 1]))); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val); } if ($inputitem['size'] & 1) { $val = $this->lookAnTable(\ord($inputitem['data'][($words * 2)])); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val); } return $inputitem; } /** * encodeMode8 * @param array $inputitem * @param int $version * @return array input item */ protected function encodeMode8($inputitem, $version) { $inputitem['bstream'] = []; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_8B, $version), $inputitem['size']); for ($i = 0; $i < $inputitem['size']; ++$i) { $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, \ord($inputitem['data'][$i])); } return $inputitem; } /** * encodeModeKanji * @param array $inputitem * @param int $version * @return array input item */ protected function encodeModeKanji($inputitem, $version) { $inputitem['bstream'] = []; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(QR_MODE_KJ, $version), (int) ($inputitem['size'] / 2)); for ($i = 0; $i < $inputitem['size']; $i += 2) { $val = (\ord($inputitem['data'][$i]) << 8) | \ord($inputitem['data'][$i + 1]); if ($val <= 0x9ffc) { $val -= 0x8140; } else { $val -= 0xc140; } $h = ($val >> 8) * 0xc0; $val = ($val & 0xff) + $h; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val); } return $inputitem; } /** * encodeModeStructure * @param array $inputitem * @return array input item */ protected function encodeModeStructure($inputitem) { $inputitem['bstream'] = []; $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, \ord($inputitem['data'][1]) - 1); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, \ord($inputitem['data'][0]) - 1); $inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, \ord($inputitem['data'][2])); return $inputitem; } /** * encodeBitStream * @param array $inputitem * @param int $version * @return array input item */ protected function encodeBitStream($inputitem, $version) { $inputitem['bstream'] = []; $words = $this->maximumWords($inputitem['mode'], $version); if ($inputitem['size'] > $words) { $st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']); $st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, \array_slice($inputitem['data'], $words)); $st1 = $this->encodeBitStream($st1, $version); $st2 = $this->encodeBitStream($st2, $version); $inputitem['bstream'] = []; $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']); $inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']); } else { switch($inputitem['mode']) { case QR_MODE_NM: { $inputitem = $this->encodeModeNum($inputitem, $version); break; } case QR_MODE_AN: { $inputitem = $this->encodeModeAn($inputitem, $version); break; } case QR_MODE_8B: { $inputitem = $this->encodeMode8($inputitem, $version); break; } case QR_MODE_KJ: { $inputitem = $this->encodeModeKanji($inputitem, $version); break; } case QR_MODE_ST: { $inputitem = $this->encodeModeStructure($inputitem); break; } default: { break; } } } return $inputitem; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRinput /** * Append data to an input object. * The data is copied and appended to the input object. * @param array $items input items * @param int $mode encoding mode * @param int $size size of data (byte) * @param array $data array of input data * @return array items */ protected function appendNewInputItem($items, $mode, $size, $data) { $newitem = $this->newInputItem($mode, $size, $data); if (!empty($newitem)) { $items[] = $newitem; } return $items; } /** * insertStructuredAppendHeader * @param array $items * @param int $size * @param int $index * @param int $parity * @return array items */ protected function insertStructuredAppendHeader($items, $size, $index, $parity) { if ($size > MAX_STRUCTURED_SYMBOLS) { return -1; } if (($index <= 0) || ($index > MAX_STRUCTURED_SYMBOLS)) { return -1; } $buf = [$size, $index, $parity]; $entry = $this->newInputItem(QR_MODE_ST, 3, buf); \array_unshift($items, $entry); return $items; } /** * calcParity * @param array $items * @return int parity */ protected function calcParity($items) { $parity = 0; foreach ($items as $item) { if ($item['mode'] != QR_MODE_ST) { for ($i = $item['size'] - 1; $i >= 0; --$i) { $parity ^= $item['data'][$i]; } } } return $parity; } /** * checkModeNum * @param int $size * @param array $data * @return bool true or false */ protected function checkModeNum($size, $data) { for ($i = 0; $i < $size; ++$i) { if ((\ord($data[$i]) < \ord('0')) || (\ord($data[$i]) > \ord('9'))){ return false; } } return true; } /** * Look up the alphabet-numeric conversion table (see JIS X0510:2004, pp.19). * @param int $c character value * @return int value */ protected function lookAnTable($c) { return (($c > 127)?-1:$this->anTable[$c]); } /** * checkModeAn * @param int $size * @param array $data * @return bool true or false */ protected function checkModeAn($size, $data) { for ($i = 0; $i < $size; ++$i) { if ($this->lookAnTable(\ord($data[$i])) == -1) { return false; } } return true; } /** * estimateBitsModeNum * @param int $size * @return int number of bits */ protected function estimateBitsModeNum($size) { $w = (int) ($size / 3); $bits = ($w * 10); switch($size - ($w * 3)) { case 1: { $bits += 4; break; } case 2: { $bits += 7; break; } } return $bits; } /** * estimateBitsModeAn * @param int $size * @return int number of bits */ protected function estimateBitsModeAn($size) { $bits = (int) ($size * 5.5); // (size / 2 ) * 11 if ($size & 1) { $bits += 6; } return $bits; } /** * estimateBitsMode8 * @param int $size * @return int number of bits */ protected function estimateBitsMode8($size) { return (int) ($size * 8); } /** * estimateBitsModeKanji * @param int $size * @return int number of bits */ protected function estimateBitsModeKanji($size) { return (int) ($size * 6.5); // (size / 2 ) * 13 } /** * checkModeKanji * @param int $size * @param array $data * @return bool true or false */ protected function checkModeKanji($size, $data) { if ($size & 1) { return false; } for ($i = 0; $i < $size; $i += 2) { $val = (\ord($data[$i]) << 8) | \ord($data[$i + 1]); if (($val < 0x8140) || (($val > 0x9ffc) && ($val < 0xe040)) || ($val > 0xebbf)) { return false; } } return true; } /** * Validate the input data. * @param int $mode encoding mode * @param int $size size of data (byte) * @param array $data data to validate * @return bool true in case of valid data, false otherwise */ protected function check($mode, $size, $data) { if ($size <= 0) { return false; } switch($mode) { case QR_MODE_NM: { return $this->checkModeNum($size, $data); } case QR_MODE_AN: { return $this->checkModeAn($size, $data); } case QR_MODE_KJ: { return $this->checkModeKanji($size, $data); } case QR_MODE_8B: { return true; } case QR_MODE_ST: { return true; } default: { break; } } return false; } /** * estimateBitStreamSize * @param array $items * @param int $version * @return int bits */ protected function estimateBitStreamSize($items, $version) { $bits = 0; if ($version == 0) { $version = 1; } foreach ($items as $item) { switch($item['mode']) { case QR_MODE_NM: { $bits = $this->estimateBitsModeNum($item['size']); break; } case QR_MODE_AN: { $bits = $this->estimateBitsModeAn($item['size']); break; } case QR_MODE_8B: { $bits = $this->estimateBitsMode8($item['size']); break; } case QR_MODE_KJ: { $bits = $this->estimateBitsModeKanji($item['size']); break; } case QR_MODE_ST: { return STRUCTURE_HEADER_BITS; } default: { return 0; } } $l = $this->lengthIndicator($item['mode'], $version); $m = 1 << $l; $num = (int) (($item['size'] + $m - 1) / $m); $bits += $num * (4 + $l); } return $bits; } /** * estimateVersion * @param array $items * @return int version */ protected function estimateVersion($items) { $version = 0; $prev = 0; do { $prev = $version; $bits = $this->estimateBitStreamSize($items, $prev); $version = $this->getMinimumVersion((int) (($bits + 7) / 8), $this->level); if ($version < 0) { return -1; } } while ($version > $prev); return $version; } /** * lengthOfCode * @param int $mode * @param int $version * @param int $bits * @return int size */ protected function lengthOfCode($mode, $version, $bits) { $payload = $bits - 4 - $this->lengthIndicator($mode, $version); switch($mode) { case QR_MODE_NM: { $chunks = (int) ($payload / 10); $remain = $payload - $chunks * 10; $size = $chunks * 3; if ($remain >= 7) { $size += 2; } elseif ($remain >= 4) { ++$size; } break; } case QR_MODE_AN: { $chunks = (int) ($payload / 11); $remain = $payload - $chunks * 11; $size = $chunks * 2; if ($remain >= 6) { ++$size; } break; } case QR_MODE_8B: { $size = (int) ($payload / 8); break; } case QR_MODE_KJ: { $size = (int) (($payload / 13) * 2); break; } case QR_MODE_ST: { $size = (int) ($payload / 8); break; } default: { $size = 0; break; } } $maxsize = $this->maximumWords($mode, $version); if ($size < 0) { $size = 0; } if ($size > $maxsize) { $size = $maxsize; } return $size; } /** * createBitStream * @param array $items * @return array of items and total bits */ protected function createBitStream($items) { $total = 0; foreach ($items as $key => $item) { $items[$key] = $this->encodeBitStream($item, $this->version); $bits = \count($items[$key]['bstream']); $total += $bits; } return [$items, $total]; } /** * convertData * @param array $items * @return array items */ protected function convertData($items) { $ver = $this->estimateVersion($items); if ($ver > $this->version) { $this->version = $ver; } while (true) { $cbs = $this->createBitStream($items); $items = $cbs[0]; $bits = $cbs[1]; if ($bits < 0) { return -1; } $ver = $this->getMinimumVersion((int) (($bits + 7) / 8), $this->level); if ($ver < 0) { return -1; } elseif ($ver > $this->version) { $this->version = $ver; } else { break; } } return $items; } /** * Append Padding Bit to bitstream * @param array $bstream * @return array bitstream */ protected function appendPaddingBit($bstream) { if ($bstream === null) { return null; } $bits = \count($bstream); $maxwords = $this->getDataLength($this->version, $this->level); $maxbits = $maxwords * 8; if ($maxbits == $bits) { return $bstream; } if ($maxbits - $bits < 5) { return $this->appendNum($bstream, $maxbits - $bits, 0); } $bits += 4; $words = (int) (($bits + 7) / 8); $padding = []; $padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0); $padlen = $maxwords - $words; if ($padlen > 0) { $padbuf = []; for ($i = 0; $i < $padlen; ++$i) { $padbuf[$i] = ($i & 1)?0x11:0xec; } $padding = $this->appendBytes($padding, $padlen, $padbuf); } return $this->appendBitstream($bstream, $padding); } /** * mergeBitStream * @param array $items items * @return array bitstream */ protected function mergeBitStream($items) { $items = $this->convertData($items); if (!\is_array($items)) { return null; } $bstream = []; foreach ($items as $item) { $bstream = $this->appendBitstream($bstream, $item['bstream']); } return $bstream; } /** * Returns a stream of bits. * @param int $items * @return array padded merged byte stream */ protected function getBitStream($items) { $bstream = $this->mergeBitStream($items); return $this->appendPaddingBit($bstream); } /** * Pack all bit streams padding bits into a byte array. * @param int $items * @return array padded merged byte stream */ protected function getByteStream($items) { $bstream = $this->getBitStream($items); return $this->bitstreamToByte($bstream); } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRbitstream /** * Return an array with zeros * @param int $setLength array size * @return array */ protected function allocate($setLength) { return \array_fill(0, $setLength, 0); } /** * Return new bitstream from number * @param int $bits number of bits * @param int $num number * @return array bitstream */ protected function newFromNum($bits, $num) { $bstream = $this->allocate($bits); $mask = 1 << ($bits - 1); for ($i = 0; $i < $bits; ++$i) { if ($num & $mask) { $bstream[$i] = 1; } else { $bstream[$i] = 0; } $mask = $mask >> 1; } return $bstream; } /** * Return new bitstream from bytes * @param int $size size * @param array $data bytes * @return array bitstream */ protected function newFromBytes($size, $data) { $bstream = $this->allocate($size * 8); $p = 0; for ($i = 0; $i < $size; ++$i) { $mask = 0x80; for ($j = 0; $j < 8; ++$j) { if ($data[$i] & $mask) { $bstream[$p] = 1; } else { $bstream[$p] = 0; } ++$p; $mask = $mask >> 1; } } return $bstream; } /** * Append one bitstream to another * @param array $bitstream original bitstream * @param array $append bitstream to append * @return array bitstream */ protected function appendBitstream($bitstream, $append) { if ((!\is_array($append)) || (\count($append) == 0)) { return $bitstream; } if (\count($bitstream) == 0) { return $append; } return \array_values(\array_merge($bitstream, $append)); } /** * Append one bitstream created from number to another * @param array $bitstream original bitstream * @param int $bits number of bits * @param int $num number * @return array bitstream */ protected function appendNum($bitstream, $bits, $num) { if ($bits == 0) { return 0; } $b = $this->newFromNum($bits, $num); return $this->appendBitstream($bitstream, $b); } /** * Append one bitstream created from bytes to another * @param array $bitstream original bitstream * @param int $size size * @param array $data bytes * @return array bitstream */ protected function appendBytes($bitstream, $size, $data) { if ($size == 0) { return 0; } $b = $this->newFromBytes($size, $data); return $this->appendBitstream($bitstream, $b); } /** * Convert bitstream to bytes * @param array $bstream original bitstream * @return array of bytes */ protected function bitstreamToByte($bstream) { if ($bstream === null) { return null; } $size = \count($bstream); if ($size == 0) { return []; } $data = \array_fill(0, (int) (($size + 7) / 8), 0); $bytes = (int) ($size / 8); $p = 0; for ($i = 0; $i < $bytes; ++$i) { $v = 0; for ($j = 0; $j < 8; ++$j) { $v = $v << 1; $v |= $bstream[$p]; ++$p; } $data[$i] = $v; } if ($size & 7) { $v = 0; for ($j = 0; $j < ($size & 7); ++$j) { $v = $v << 1; $v |= $bstream[$p]; ++$p; } $data[$bytes] = $v; } return $data; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRspec /** * Replace a value on the array at the specified position * @param array $srctab * @param int $x X position * @param int $y Y position * @param string $repl value to replace * @param int $replLen length of the repl string * @return array srctab */ protected function qrstrset($srctab, $x, $y, $repl, $replLen = false) { $srctab[$y] = \substr_replace($srctab[$y], ($replLen !== false)?\substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:\strlen($repl)); return $srctab; } /** * Return maximum data code length (bytes) for the version. * @param int $version version * @param int $level error correction level * @return int maximum size (bytes) */ protected function getDataLength($version, $level) { return $this->capacity[$version][QRCAP_WORDS] - $this->capacity[$version][QRCAP_EC][$level]; } /** * Return maximum error correction code length (bytes) for the version. * @param int $version version * @param int $level error correction level * @return int ECC size (bytes) */ protected function getECCLength($version, $level){ return $this->capacity[$version][QRCAP_EC][$level]; } /** * Return the width of the symbol for the version. * @param int $version version * @return int width */ protected function getWidth($version) { return $this->capacity[$version][QRCAP_WIDTH]; } /** * Return the numer of remainder bits. * @param int $version version * @return int number of remainder bits */ protected function getRemainder($version) { return $this->capacity[$version][QRCAP_REMINDER]; } /** * Return a version number that satisfies the input code length. * @param int $size input code length (bytes) * @param int $level error correction level * @return int version number */ protected function getMinimumVersion($size, $level) { for ($i = 1; $i <= QRSPEC_VERSION_MAX; ++$i) { $words = ($this->capacity[$i][QRCAP_WORDS] - $this->capacity[$i][QRCAP_EC][$level]); if ($words >= $size) { return $i; } } // the size of input data is greater than QR capacity, try to lover the error correction mode return -1; } /** * Return the size of length indicator for the mode and version. * @param int $mode encoding mode * @param int $version version * @return int the size of the appropriate length indicator (bits) */ protected function lengthIndicator($mode, $version) { if ($mode == QR_MODE_ST) { return 0; } if ($version <= 9) { $l = 0; } elseif ($version <= 26) { $l = 1; } else { $l = 2; } return $this->lengthTableBits[$mode][$l]; } /** * Return the maximum length for the mode and version. * @param int $mode encoding mode * @param int $version version * @return int the maximum length (bytes) */ protected function maximumWords($mode, $version) { if ($mode == QR_MODE_ST) { return 3; } if ($version <= 9) { $l = 0; } elseif ($version <= 26) { $l = 1; } else { $l = 2; } $bits = $this->lengthTableBits[$mode][$l]; $words = (1 << $bits) - 1; if ($mode == QR_MODE_KJ) { $words *= 2; // the number of bytes is required } return $words; } /** * Return an array of ECC specification. * @param int $version version * @param int $level error correction level * @param array $spec an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code} * @return array spec */ protected function getEccSpec($version, $level, $spec) { if (\count($spec) < 5) { $spec = [0, 0, 0, 0, 0]; } $b1 = $this->eccTable[$version][$level][0]; $b2 = $this->eccTable[$version][$level][1]; $data = $this->getDataLength($version, $level); $ecc = $this->getECCLength($version, $level); if ($b2 == 0) { $spec[0] = $b1; $spec[1] = (int) ($data / $b1); $spec[2] = (int) ($ecc / $b1); $spec[3] = 0; $spec[4] = 0; } else { $spec[0] = $b1; $spec[1] = (int) ($data / ($b1 + $b2)); $spec[2] = (int) ($ecc / ($b1 + $b2)); $spec[3] = $b2; $spec[4] = $spec[1] + 1; } return $spec; } /** * Put an alignment marker. * @param array $frame frame * @param int $ox X center coordinate of the pattern * @param int $oy Y center coordinate of the pattern * @return array frame */ protected function putAlignmentMarker($frame, $ox, $oy) { $finder = [ "\xa1\xa1\xa1\xa1\xa1", "\xa1\xa0\xa0\xa0\xa1", "\xa1\xa0\xa1\xa0\xa1", "\xa1\xa0\xa0\xa0\xa1", "\xa1\xa1\xa1\xa1\xa1", ]; $yStart = $oy - 2; $xStart = $ox - 2; for ($y = 0; $y < 5; ++$y) { $frame = $this->qrstrset($frame, $xStart, $yStart + $y, $finder[$y]); } return $frame; } /** * Put an alignment pattern. * @param int $version version * @param array $frame frame * @param int $width width * @return array frame */ protected function putAlignmentPattern($version, $frame, $width) { if ($version < 2) { return $frame; } $d = $this->alignmentPattern[$version][1] - $this->alignmentPattern[$version][0]; if ($d < 0) { $w = 2; } else { $w = (int) (($width - $this->alignmentPattern[$version][0]) / $d + 2); } if ($w * $w - 3 == 1) { $x = $this->alignmentPattern[$version][0]; $y = $this->alignmentPattern[$version][0]; $frame = $this->putAlignmentMarker($frame, $x, $y); return $frame; } $cx = $this->alignmentPattern[$version][0]; $wo = $w - 1; for ($x = 1; $x < $wo; ++$x) { $frame = $this->putAlignmentMarker($frame, 6, $cx); $frame = $this->putAlignmentMarker($frame, $cx, 6); $cx += $d; } $cy = $this->alignmentPattern[$version][0]; for ($y = 0; $y < $wo; ++$y) { $cx = $this->alignmentPattern[$version][0]; for ($x = 0; $x < $wo; ++$x) { $frame = $this->putAlignmentMarker($frame, $cx, $cy); $cx += $d; } $cy += $d; } return $frame; } /** * Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. Use lower 18 bits. * @param int $version version * @return string BCH encoded version information pattern */ protected function getVersionPattern($version) { if (($version < 7) || ($version > QRSPEC_VERSION_MAX)) { return 0; } return $this->versionPattern[($version - 7)]; } /** * Return BCH encoded format information pattern. * @param array $mask * @param int $level error correction level * @return string BCH encoded format information pattern */ protected function getFormatInfo($mask, $level) { if (($mask < 0) || ($mask > 7)) { return 0; } if (($level < 0) || ($level > 3)) { return 0; } return $this->formatInfo[$level][$mask]; } /** * Put a finder pattern. * @param array $frame frame * @param int $ox X center coordinate of the pattern * @param int $oy Y center coordinate of the pattern * @return array frame */ protected function putFinderPattern($frame, $ox, $oy) { $finder = [ "\xc1\xc1\xc1\xc1\xc1\xc1\xc1", "\xc1\xc0\xc0\xc0\xc0\xc0\xc1", "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", "\xc1\xc0\xc1\xc1\xc1\xc0\xc1", "\xc1\xc0\xc0\xc0\xc0\xc0\xc1", "\xc1\xc1\xc1\xc1\xc1\xc1\xc1", ]; for ($y = 0; $y < 7; ++$y) { $frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]); } return $frame; } /** * Return a copy of initialized frame. * @param int $version version * @return array array of unsigned char */ protected function createFrame($version) { $width = $this->capacity[$version][QRCAP_WIDTH]; $frameLine = \str_repeat("\0", $width); $frame = \array_fill(0, $width, $frameLine); // Finder pattern $frame = $this->putFinderPattern($frame, 0, 0); $frame = $this->putFinderPattern($frame, $width - 7, 0); $frame = $this->putFinderPattern($frame, 0, $width - 7); // Separator $yOffset = $width - 7; for ($y = 0; $y < 7; ++$y) { $frame[$y][7] = "\xc0"; $frame[$y][$width - 8] = "\xc0"; $frame[$yOffset][7] = "\xc0"; ++$yOffset; } $setPattern = \str_repeat("\xc0", 8); $frame = $this->qrstrset($frame, 0, 7, $setPattern); $frame = $this->qrstrset($frame, $width - 8, 7, $setPattern); $frame = $this->qrstrset($frame, 0, $width - 8, $setPattern); // Format info $setPattern = \str_repeat("\x84", 9); $frame = $this->qrstrset($frame, 0, 8, $setPattern); $frame = $this->qrstrset($frame, $width - 8, 8, $setPattern, 8); $yOffset = $width - 8; for ($y = 0; $y < 8; ++$y,++$yOffset) { $frame[$y][8] = "\x84"; $frame[$yOffset][8] = "\x84"; } // Timing pattern $wo = $width - 15; for ($i = 1; $i < $wo; ++$i) { $frame[6][7 + $i] = \chr(0x90 | ($i & 1)); $frame[7 + $i][6] = \chr(0x90 | ($i & 1)); } // Alignment pattern $frame = $this->putAlignmentPattern($version, $frame, $width); // Version information if ($version >= 7) { $vinf = $this->getVersionPattern($version); $v = $vinf; for ($x = 0; $x < 6; ++$x) { for ($y = 0; $y < 3; ++$y) { $frame[($width - 11) + $y][$x] = \chr(0x88 | ($v & 1)); $v = $v >> 1; } } $v = $vinf; for ($y = 0; $y < 6; ++$y) { for ($x = 0; $x < 3; ++$x) { $frame[$y][$x + ($width - 11)] = \chr(0x88 | ($v & 1)); $v = $v >> 1; } } } // and a little bit... $frame[$width - 8][8] = "\x81"; return $frame; } /** * Set new frame for the specified version. * @param int $version version * @return array array of unsigned char */ protected function newFrame($version) { if (($version < 1) || ($version > QRSPEC_VERSION_MAX)) { return null; } if (!isset($this->frames[$version])) { $this->frames[$version] = $this->createFrame($version); } if ($this->frames[$version] === null) { return null; } return $this->frames[$version]; } /** * Return block number 0 * @param array $spec * @return int value */ protected function rsBlockNum($spec) { return ($spec[0] + $spec[3]); } /** * Return block number 1 * @param array $spec * @return int value */ protected function rsBlockNum1($spec) { return $spec[0]; } /** * Return data codes 1 * @param array $spec * @return int value */ protected function rsDataCodes1($spec) { return $spec[1]; } /** * Return ecc codes 1 * @param array $spec * @return int value */ protected function rsEccCodes1($spec) { return $spec[2]; } /** * Return block number 2 * @param array $spec * @return int value */ protected function rsBlockNum2($spec) { return $spec[3]; } /** * Return data codes 2 * @param array $spec * @return int value */ protected function rsDataCodes2($spec) { return $spec[4]; } /** * Return ecc codes 2 * @param array $spec * @return int value */ protected function rsEccCodes2($spec) { return $spec[2]; } /** * Return data length * @param array $spec * @return int value */ protected function rsDataLength($spec) { return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); } /** * Return ecc length * @param array $spec * @return int value */ protected function rsEccLength($spec) { return ($spec[0] + $spec[3]) * $spec[2]; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRrs /** * Initialize a Reed-Solomon codec and add it to existing rsitems * @param int $symsize symbol size, bits * @param int $gfpoly Field generator polynomial coefficients * @param int $fcr first root of RS code generator polynomial, index form * @param int $prim primitive element to generate polynomial roots * @param int $nroots RS code generator polynomial degree (number of roots) * @param int $pad padding bytes at front of shortened block * @return array array of RS values: */ protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) { foreach ($this->rsitems as $rs) { if (($rs['pad'] != $pad) || ($rs['nroots'] != $nroots) || ($rs['mm'] != $symsize) || ($rs['gfpoly'] != $gfpoly) || ($rs['fcr'] != $fcr) || ($rs['prim'] != $prim)) { continue; } return $rs; } $rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad); \array_unshift($this->rsitems, $rs); return $rs; } // - - - - - - - - - - - - - - - - - - - - - - - - - // QRrsItem /** * modnn * @param array $rs RS values * @param int $x X position * @return int X osition */ protected function modnn($rs, $x) { while ($x >= $rs['nn']) { $x -= $rs['nn']; $x = ($x >> $rs['mm']) + ($x & $rs['nn']); } return $x; } /** * Initialize a Reed-Solomon codec and returns an array of values. * @param int $symsize symbol size, bits * @param int $gfpoly Field generator polynomial coefficients * @param int $fcr first root of RS code generator polynomial, index form * @param int $prim primitive element to generate polynomial roots * @param int $nroots RS code generator polynomial degree (number of roots) * @param int $pad padding bytes at front of shortened block * @return array array of RS values: */ protected function init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) { // Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2) $rs = null; // Check parameter ranges if (($symsize < 0) || ($symsize > 8)) { return $rs; } if (($fcr < 0) || ($fcr >= (1 << $symsize))) { return $rs; } if (($prim <= 0) || ($prim >= (1 << $symsize))) { return $rs; } if (($nroots < 0) || ($nroots >= (1 << $symsize))) { return $rs; } if (($pad < 0) || ($pad >= ((1 << $symsize) - 1 - $nroots))) { return $rs; } $rs = []; $rs['mm'] = $symsize; $rs['nn'] = (1 << $symsize) - 1; $rs['pad'] = $pad; $rs['alpha_to'] = \array_fill(0, ($rs['nn'] + 1), 0); $rs['index_of'] = \array_fill(0, ($rs['nn'] + 1), 0); // PHP style macro replacement ;) $NN = & $rs['nn']; $A0 = & $NN; // Generate Galois field lookup tables $rs['index_of'][0] = $A0; // log(zero) = -inf $rs['alpha_to'][$A0] = 0; // alpha**-inf = 0 $sr = 1; for ($i = 0; $i < $rs['nn']; ++$i) { $rs['index_of'][$sr] = $i; $rs['alpha_to'][$i] = $sr; $sr <<= 1; if ($sr & (1 << $symsize)) { $sr ^= $gfpoly; } $sr &= $rs['nn']; } if ($sr != 1) { // field generator polynomial is not primitive! return null; } // Form RS code generator polynomial from its roots $rs['genpoly'] = \array_fill(0, ($nroots + 1), 0); $rs['fcr'] = $fcr; $rs['prim'] = $prim; $rs['nroots'] = $nroots; $rs['gfpoly'] = $gfpoly; // Find prim-th root of 1, used in decoding for ($iprim = 1; ($iprim % $prim) != 0; $iprim += $rs['nn']) { // intentional empty-body loop! } $rs['iprim'] = (int) ($iprim / $prim); $rs['genpoly'][0] = 1; for ($i = 0,$root = $fcr * $prim; $i < $nroots; $i++, $root += $prim) { $rs['genpoly'][$i + 1] = 1; // Multiply rs->genpoly[] by @**(root + x) for ($j = $i; $j > 0; --$j) { if ($rs['genpoly'][$j] != 0) { $rs['genpoly'][$j] = $rs['genpoly'][$j - 1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)]; } else { $rs['genpoly'][$j] = $rs['genpoly'][$j - 1]; } } // rs->genpoly[0] can never be zero $rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)]; } // convert rs->genpoly[] to index form for quicker encoding for ($i = 0; $i <= $nroots; ++$i) { $rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]]; } return $rs; } /** * Encode a Reed-Solomon codec and returns the parity array * @param array $rs RS values * @param array $data data * @param array $parity parity * @return parity array */ protected function encode_rs_char($rs, $data, $parity) { $MM = & $rs['mm']; // bits per symbol $NN = & $rs['nn']; // the total number of symbols in a RS block $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 $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 $GENPOLY = & $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form $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 $FCR = & $rs['fcr']; // first consecutive root, index form $PRIM = & $rs['prim']; // primitive element, index form $IPRIM = & $rs['iprim']; // prim-th root of 1, index form $PAD = & $rs['pad']; // the number of pad symbols in a block $A0 = & $NN; $parity = \array_fill(0, $NROOTS, 0); for ($i = 0; $i < ($NN - $NROOTS - $PAD); ++$i) { $feedback = $INDEX_OF[$data[$i] ^ $parity[0]]; if ($feedback != $A0) { // feedback term is non-zero // This line is unnecessary when GENPOLY[NROOTS] is unity, as it must // always be for the polynomials constructed by init_rs() $feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback); for ($j = 1; $j < $NROOTS; ++$j) { $parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])]; } } // Shift \array_shift($parity); if ($feedback != $A0) { \array_push($parity, $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]); } else { \array_push($parity, 0); } } return $parity; } } // end QRcode class //============================================================+ // END OF FILE //============================================================+