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tcpdf/qrcode.php
nicolaasuni 74e79abf2e 5.9.033
2010-12-18 15:11:55 +01:00

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<?php
//============================================================+
// File name : qrcode.php
// Version : 1.0.009
// Begin : 2010-03-22
// Last Update : 2010-12-16
// Author : Nicola Asuni - Tecnick.com S.r.l - Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com
// License : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
// -------------------------------------------------------------------
// Copyright (C) 2010-2010 Nicola Asuni - Tecnick.com S.r.l.
//
// This file is part of TCPDF software library.
//
// TCPDF is free software: you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// TCPDF is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with TCPDF. If not, see <http://www.gnu.org/licenses/>.
//
// 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 <deltalab at poczta dot fm>
// 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 1.0.009
*/
// 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
// #*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#
// for compatibility with PHP4
if (!function_exists('str_split')) {
/**
* Convert a string to an array (needed for PHP4 compatibility)
* @param $string (string) The input string.
* @param $split_length (int) Maximum length of the chunk.
* @return If the optional split_length parameter is specified, the returned array will be broken down into chunks with each being split_length in length, otherwise each chunk will be one character in length. FALSE is returned if split_length is less than 1. If the split_length length exceeds the length of string , the entire string is returned as the first (and only) array element.
*/
function str_split($string, $split_length=1) {
if ((strlen($string) > $split_length) OR (!$split_length)) {
do {
$c = strlen($string);
$parts[] = substr($string, 0, $split_length);
$string = substr($string, $split_length);
} while ($string !== false);
} else {
$parts = array($string);
}
return $parts;
}
}
// #####################################################
/**
* @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 1.0.009
*/
class QRcode {
/**
* Barcode array to be returned which is readable by TCPDF.
* @protected
*/
protected $barcode_array = 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 = array();
/**
* Error correction code.
* @protected
*/
protected $ecccode = array();
/**
* Blocks.
* @protected
*/
protected $blocks;
/**
* Reed-Solomon blocks.
* @protected
*/
protected $rsblocks = array(); //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 = array();
// ---- QRsplit ----
/**
* Input data string.
* @protected
*/
protected $dataStr = '';
/**
* Input items.
* @protected
*/
protected $items;
// Reed-Solomon items
/**
* Reed-Solomon items.
* @protected
*/
protected $rsitems = array();
/**
* Array of frames.
* @protected
*/
protected $frames = array();
/**
* Alphabet-numeric convesion table.
* @protected
*/
protected $anTable = array(
-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 = array(
array( 0, 0, 0, array( 0, 0, 0, 0)), //
array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
array( 25, 44, 7, array( 10, 16, 22, 28)), //
array( 29, 70, 7, array( 15, 26, 36, 44)), //
array( 33, 100, 7, array( 20, 36, 52, 64)), //
array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
array( 41, 172, 7, array( 36, 64, 96, 112)), //
array( 45, 196, 0, array( 40, 72, 108, 130)), //
array( 49, 242, 0, array( 48, 88, 132, 156)), //
array( 53, 292, 0, array( 60, 110, 160, 192)), //
array( 57, 346, 0, array( 72, 130, 192, 224)), // 10
array( 61, 404, 0, array( 80, 150, 224, 264)), //
array( 65, 466, 0, array( 96, 176, 260, 308)), //
array( 69, 532, 0, array( 104, 198, 288, 352)), //
array( 73, 581, 3, array( 120, 216, 320, 384)), //
array( 77, 655, 3, array( 132, 240, 360, 432)), // 15
array( 81, 733, 3, array( 144, 280, 408, 480)), //
array( 85, 815, 3, array( 168, 308, 448, 532)), //
array( 89, 901, 3, array( 180, 338, 504, 588)), //
array( 93, 991, 3, array( 196, 364, 546, 650)), //
array( 97, 1085, 3, array( 224, 416, 600, 700)), // 20
array(101, 1156, 4, array( 224, 442, 644, 750)), //
array(105, 1258, 4, array( 252, 476, 690, 816)), //
array(109, 1364, 4, array( 270, 504, 750, 900)), //
array(113, 1474, 4, array( 300, 560, 810, 960)), //
array(117, 1588, 4, array( 312, 588, 870, 1050)), // 25
array(121, 1706, 4, array( 336, 644, 952, 1110)), //
array(125, 1828, 4, array( 360, 700, 1020, 1200)), //
array(129, 1921, 3, array( 390, 728, 1050, 1260)), //
array(133, 2051, 3, array( 420, 784, 1140, 1350)), //
array(137, 2185, 3, array( 450, 812, 1200, 1440)), // 30
array(141, 2323, 3, array( 480, 868, 1290, 1530)), //
array(145, 2465, 3, array( 510, 924, 1350, 1620)), //
array(149, 2611, 3, array( 540, 980, 1440, 1710)), //
array(153, 2761, 3, array( 570, 1036, 1530, 1800)), //
array(157, 2876, 0, array( 570, 1064, 1590, 1890)), // 35
array(161, 3034, 0, array( 600, 1120, 1680, 1980)), //
array(165, 3196, 0, array( 630, 1204, 1770, 2100)), //
array(169, 3362, 0, array( 660, 1260, 1860, 2220)), //
array(173, 3532, 0, array( 720, 1316, 1950, 2310)), //
array(177, 3706, 0, array( 750, 1372, 2040, 2430)) // 40
);
/**
* Array Length indicator.
* @protected
*/
protected $lengthTableBits = array(
array(10, 12, 14),
array( 9, 11, 13),
array( 8, 16, 16),
array( 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 = array(
array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)), //
array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), //
array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)), //
array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)), //
array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)), //
array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)), //
array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)), //
array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)), //
array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), // 10
array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)), //
array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)), //
array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)), //
array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)), //
array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), // 15
array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)), //
array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)), //
array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)), //
array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)), //
array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), // 20
array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)), //
array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)), //
array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)), //
array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)), //
array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), // 25
array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)), //
array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)), //
array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)), //
array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)), //
array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), // 30
array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)), //
array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)), //
array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)), //
array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)), //
array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), // 35
array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)), //
array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)), //
array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)), //
array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)), //
array(array(19, 6), array(18, 31), array(34, 34), array(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 = array(
array( 0, 0),
array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), // 11-15
array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), // 16-20
array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), // 21-25
array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), // 26-30
array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), // 31-35
array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(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 = array(
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 = array(
array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976), //
array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0), //
array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed), //
array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b) //
);
// -------------------------------------------------
// -------------------------------------------------
/**
* This is the class constructor.
* Creates a QRcode object
* @param $code (string) code to represent using QRcode
* @param $eclevel (string) error level: <ul><li>L : About 7% or less errors can be corrected.</li><li>M : About 15% or less errors can be corrected.</li><li>Q : About 25% or less errors can be corrected.</li><li>H : About 30% or less errors can be corrected.</li></ul>
* @public
* @since 1.0.000
*/
public function __construct($code, $eclevel = 'L') {
$barcode_array = array();
if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
return false;
}
// set error correction level
$this->level = array_search($eclevel, array('L', 'M', 'Q', 'H'));
if ($this->level === false) {
$this->level = QR_ECLEVEL_L;
}
if (($this->hint != QR_MODE_8B) AND ($this->hint != QR_MODE_KJ)) {
return false;
}
if (($this->version < 0) OR ($this->version > QRSPEC_VERSION_MAX)) {
return false;
}
$this->items = array();
$this->encodeString($code);
if (is_null($this->data)) {
return false;
}
$qrTab = $this->binarize($this->data);
$size = count($qrTab);
$barcode_array['num_rows'] = $size;
$barcode_array['num_cols'] = $size;
$barcode_array['bcode'] = array();
foreach ($qrTab as $line) {
$arrAdd = array();
foreach (str_split($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 $frame (array) array to binarize
* @return array frame in binary form
*/
protected function binarize($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 $mask (int) masking mode
*/
protected function encodeMask($mask) {
$spec = array(0, 0, 0, 0, 0);
$this->datacode = $this->getByteStream($this->items);
if (is_null($this->datacode)) {
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, (intval(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 $at (array) x,y position
* @param $val (int) value of the character to set
*/
protected function setFrameAt($at, $val) {
$this->frame[$at['y']][$at['x']] = chr($val);
}
/**
* Get frame value at specified position
* @param $at (array) x,y position
* @return value at specified position
*/
protected function getFrameAt($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) {
$this->bit = 0;
return array('x'=>$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) OR ($y < 0)) {
return NULL;
}
$this->x = $x;
$this->y = $y;
} while(ord($this->frame[$y][$x]) & 0x80);
return array('x'=>$x, 'y'=>$y);
}
// - - - - - - - - - - - - - - - - - - - - - - - - -
// QRrawcode
/**
* Initialize code.
* @param $spec (array) array of ECC specification
* @return 0 in case of success, -1 in case of error
*/
protected function init($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] = array();
$this->rsblocks[$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] = array();
$this->rsblocks[$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 $width (int) frame width
* @param $frame (array) frame
* @param $mask (array) masking mode
* @param $level (int) error correction level
* @return int blacks
*/
protected function writeFormatInformation($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 $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask0($x, $y) {
return ($x + $y) & 1;
}
/**
* mask1
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask1($x, $y) {
return ($y & 1);
}
/**
* mask2
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask2($x, $y) {
return ($x % 3);
}
/**
* mask3
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask3($x, $y) {
return ($x + $y) % 3;
}
/**
* mask4
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask4($x, $y) {
return (((int)($y / 2)) + ((int)($x / 3))) & 1;
}
/**
* mask5
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask5($x, $y) {
return (($x * $y) & 1) + ($x * $y) % 3;
}
/**
* mask6
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask6($x, $y) {
return ((($x * $y) & 1) + ($x * $y) % 3) & 1;
}
/**
* mask7
* @param $x (int) X position
* @param $y (int) Y position
* @return int mask
*/
protected function mask7($x, $y) {
return ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
}
/**
* Return bitmask
* @param $maskNo (int) mask number
* @param $width (int) width
* @param $frame (array) frame
* @return array bitmask
*/
protected function generateMaskNo($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 {
$maskFunc = call_user_func(array($this, 'mask'.$maskNo), $x, $y);
$bitMask[$y][$x] = ($maskFunc == 0)?1:0;
}
}
}
return $bitMask;
}
/**
* makeMaskNo
* @param $maskNo (int)
* @param $width (int)
* @param $s (int)
* @param $d (int)
* @param $maskGenOnly (boolean)
* @return int b
*/
protected function makeMaskNo($maskNo, $width, $s, &$d, $maskGenOnly=false) {
$b = 0;
$bitMask = array();
$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 $width (int)
* @param $frame (array)
* @param $maskNo (int)
* @param $level (int)
* @return array mask
*/
protected function makeMask($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 $length (int)
* @return int demerit
*/
protected function calcN1N3($length) {
$demerit = 0;
for ($i=0; $i<$length; ++$i) {
if ($this->runLength[$i] >= 5) {
$demerit += (N1 + ($this->runLength[$i] - 5));
}
if ($i & 1) {
if (($i >= 3) AND ($i < ($length-2)) AND ($this->runLength[$i] % 3 == 0)) {
$fact = (int)($this->runLength[$i] / 3);
if (($this->runLength[$i-2] == $fact)
AND ($this->runLength[$i-1] == $fact)
AND ($this->runLength[$i+1] == $fact)
AND ($this->runLength[$i+2] == $fact)) {
if (($this->runLength[$i-3] < 0) OR ($this->runLength[$i-3] >= (4 * $fact))) {
$demerit += N3;
} elseif ((($i+3) >= $length) OR ($this->runLength[$i+3] >= (4 * $fact))) {
$demerit += N3;
}
}
}
}
}
return $demerit;
}
/**
* evaluateSymbol
* @param $width (int)
* @param $frame (array)
* @return int demerit
*/
protected function evaluateSymbol($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) AND ($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) AND (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) AND (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 $width (int)
* @param $frame (array)
* @param $level (int)
* @return array best mask
*/
protected function mask($width, $frame, $level) {
$minDemerit = PHP_INT_MAX;
$bestMaskNum = 0;
$bestMask = array();
$checked_masks = array(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) {
$remPos = rand (0, count($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 $str (string) string
* @param $pos (int) characted position
* @return boolean true of false
*/
protected function isdigitat($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 $str (string) string
* @param $pos (int) characted position
* @return boolean true of false
*/
protected function isalnumat($str, $pos) {
if ($pos >= strlen($str)) {
return false;
}
return ($this->lookAnTable(ord($str[$pos])) >= 0);
}
/**
* identifyMode
* @param $pos (int)
* @return int mode
*/
protected function identifyMode($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 && $word <= 0x9ffc) OR ($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));
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 $run;
}
/**
* splitString
*/
protected function splitString() {
while (strlen($this->dataStr) > 0) {
if ($this->dataStr == '') {
return 0;
}
$mode = $this->identifyMode(0);
switch ($mode) {
case QR_MODE_NM: {
$length = $this->eatNum();
break;
}
case QR_MODE_AN: {
$length = $this->eatAn();
break;
}
case QR_MODE_KJ: {
if ($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);
}
}
/**
* 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[$p]) >= ord('a')) AND (ord($this->dataStr[$p]) <= ord('z'))) {
$this->dataStr[$p] = chr(ord($this->dataStr[$p]) - 32);
}
$p++;
}
}
return $this->dataStr;
}
// - - - - - - - - - - - - - - - - - - - - - - - - -
// QRinputItem
/**
* newInputItem
* @param $mode (int)
* @param $size (int)
* @param $data (array)
* @param $bstream (array)
* @return array input item
*/
protected function newInputItem($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 = array();
$inputitem['mode'] = $mode;
$inputitem['size'] = $size;
$inputitem['data'] = $setData;
$inputitem['bstream'] = $bstream;
return $inputitem;
}
/**
* encodeModeNum
* @param $inputitem (array)
* @param $version (int)
* @return array input item
*/
protected function encodeModeNum($inputitem, $version) {
$words = (int)($inputitem['size'] / 3);
$inputitem['bstream'] = array();
$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 $inputitem (array)
* @param $version (int)
* @return array input item
*/
protected function encodeModeAn($inputitem, $version) {
$words = (int)($inputitem['size'] / 2);
$inputitem['bstream'] = array();
$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 $inputitem (array)
* @param $version (int)
* @return array input item
*/
protected function encodeMode8($inputitem, $version) {
$inputitem['bstream'] = array();
$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 $inputitem (array)
* @param $version (int)
* @return array input item
*/
protected function encodeModeKanji($inputitem, $version) {
$inputitem['bstream'] = array();
$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 $inputitem (array)
* @return array input item
*/
protected function encodeModeStructure($inputitem) {
$inputitem['bstream'] = array();
$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 $inputitem (array)
* @param $version (int)
* @return array input item
*/
protected function encodeBitStream($inputitem, $version) {
$inputitem['bstream'] = array();
$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'] = array();
$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 $items (arrray) input items
* @param $mode (int) encoding mode.
* @param $size (int) size of data (byte).
* @param $data (array) array of input data.
* @return items
*
*/
protected function appendNewInputItem($items, $mode, $size, $data) {
$newitem = $this->newInputItem($mode, $size, $data);
if (!empty($newitem)) {
$items[] = $newitem;
}
return $items;
}
/**
* insertStructuredAppendHeader
* @param $items (array)
* @param $size (int)
* @param $index (int)
* @param $parity (int)
* @return array items
*/
protected function insertStructuredAppendHeader($items, $size, $index, $parity) {
if ($size > MAX_STRUCTURED_SYMBOLS) {
return -1;
}
if (($index <= 0) OR ($index > MAX_STRUCTURED_SYMBOLS)) {
return -1;
}
$buf = array($size, $index, $parity);
$entry = $this->newInputItem(QR_MODE_ST, 3, buf);
array_unshift($items, $entry);
return $items;
}
/**
* calcParity
* @param $items (array)
* @return int parity
*/
protected function calcParity($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 $size (int)
* @param $data (array)
* @return boolean true or false
*/
protected function checkModeNum($size, $data) {
for ($i=0; $i<$size; ++$i) {
if ((ord($data[$i]) < ord('0')) OR (ord($data[$i]) > ord('9'))){
return false;
}
}
return true;
}
/**
* Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
* @param $c (int) character value
* @return value
*/
protected function lookAnTable($c) {
return (($c > 127)?-1:$this->anTable[$c]);
}
/**
* checkModeAn
* @param $size (int)
* @param $data (array)
* @return boolean true or false
*/
protected function checkModeAn($size, $data) {
for ($i=0; $i<$size; ++$i) {
if ($this->lookAnTable(ord($data[$i])) == -1) {
return false;
}
}
return true;
}
/**
* estimateBitsModeNum
* @param $size (int)
* @return int number of bits
*/
protected function estimateBitsModeNum($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 $size (int)
* @return int number of bits
*/
protected function estimateBitsModeAn($size) {
$bits = (int)($size * 5.5); // (size / 2 ) * 11
if ($size & 1) {
$bits += 6;
}
return $bits;
}
/**
* estimateBitsMode8
* @param $size (int)
* @return int number of bits
*/
protected function estimateBitsMode8($size) {
return (int)($size * 8);
}
/**
* estimateBitsModeKanji
* @param $size (int)
* @return int number of bits
*/
protected function estimateBitsModeKanji($size) {
return (int)($size * 6.5); // (size / 2 ) * 13
}
/**
* checkModeKanji
* @param $size (int)
* @param $data (array)
* @return boolean true or false
*/
protected function checkModeKanji($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) OR (($val > 0x9ffc) AND ($val < 0xe040)) OR ($val > 0xebbf)) {
return false;
}
}
return true;
}
/**
* Validate the input data.
* @param $mode (int) encoding mode.
* @param $size (int) size of data (byte).
* @param $data (array) data to validate
* @return boolean true in case of valid data, false otherwise
*/
protected function check($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 $items (array)
* @param $version (int)
* @return int bits
*/
protected function estimateBitStreamSize($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 $items (array)
* @return int version
*/
protected function estimateVersion($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 $mode (int)
* @param $version (int)
* @param $bits (int)
* @return int size
*/
protected function lengthOfCode($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 += 1;
}
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 $items (array)
* @return array of items and total bits
*/
protected function createBitStream($items) {
$total = 0;
foreach ($items as $key => $item) {
$items[$key] = $this->encodeBitStream($item, $this->version);
$bits = count($items[$key]['bstream']);
$total += $bits;
}
return array($items, $total);
}
/**
* convertData
* @param $items (array)
* @return array items
*/
protected function convertData($items) {
$ver = $this->estimateVersion($items);
if ($ver > $this->version) {
$this->version = $ver;
}
for (;;) {
$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 $bstream (array)
* @return array bitstream
*/
protected function appendPaddingBit($bstream) {
if (is_null($bstream)) {
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 = array();
$padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
$padlen = $maxwords - $words;
if ($padlen > 0) {
$padbuf = array();
for ($i=0; $i<$padlen; ++$i) {
$padbuf[$i] = ($i&1)?0x11:0xec;
}
$padding = $this->appendBytes($padding, $padlen, $padbuf);
}
return $this->appendBitstream($bstream, $padding);
}
/**
* mergeBitStream
* @param $items (array) items
* @return array bitstream
*/
protected function mergeBitStream($items) {
$items = $this->convertData($items);
if (!is_array($items)) {
return null;
}
$bstream = array();
foreach ($items as $item) {
$bstream = $this->appendBitstream($bstream, $item['bstream']);
}
return $bstream;
}
/**
* Returns a stream of bits.
* @param $items (int)
* @return array padded merged byte stream
*/
protected function getBitStream($items) {
$bstream = $this->mergeBitStream($items);
return $this->appendPaddingBit($bstream);
}
/**
* Pack all bit streams padding bits into a byte array.
* @param $items (int)
* @return array padded merged byte stream
*/
protected function getByteStream($items) {
$bstream = $this->getBitStream($items);
return $this->bitstreamToByte($bstream);
}
// - - - - - - - - - - - - - - - - - - - - - - - - -
// QRbitstream
/**
* Return an array with zeros
* @param $setLength (int) array size
* @return array
*/
protected function allocate($setLength) {
return array_fill(0, $setLength, 0);
}
/**
* Return new bitstream from number
* @param $bits (int) number of bits
* @param $num (int) number
* @return array bitstream
*/
protected function newFromNum($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 $size (int) size
* @param $data (array) bytes
* @return array bitstream
*/
protected function newFromBytes($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 $bitstream (array) original bitstream
* @param $append (array) bitstream to append
* @return array bitstream
*/
protected function appendBitstream($bitstream, $append) {
if ((!is_array($append)) OR (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 $bitstream (array) original bitstream
* @param $bits (int) number of bits
* @param $num (int) number
* @return array bitstream
*/
protected function appendNum($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 $bitstream (array) original bitstream
* @param $size (int) size
* @param $data (array) bytes
* @return array bitstream
*/
protected function appendBytes($bitstream, $size, $data) {
if ($size == 0) {
return 0;
}
$b = $this->newFromBytes($size, $data);
return $this->appendBitstream($bitstream, $b);
}
/**
* Convert bitstream to bytes
* @param $bstream (array) original bitstream
* @return array of bytes
*/
protected function bitstreamToByte($bstream) {
if (is_null($bstream)) {
return null;
}
$size = count($bstream);
if ($size == 0) {
return array();
}
$data = array_fill(0, (int)(($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 $srctab (array)
* @param $x (int) X position
* @param $y (int) Y position
* @param $repl (string) value to replace
* @param $replLen (int) length of the repl string
* @return array srctab
*/
protected function qrstrset($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 $version (int) version
* @param $level (int) error correction level
* @return int maximum size (bytes)
*/
protected function getDataLength($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 $version (int) version
* @param $level (int) error correction level
* @return int ECC size (bytes)
*/
protected function getECCLength($version, $level){
return $this->capacity[$version][QRCAP_EC][$level];
}
/**
* Return the width of the symbol for the version.
* @param $version (int) version
* @return int width
*/
protected function getWidth($version) {
return $this->capacity[$version][QRCAP_WIDTH];
}
/**
* Return the numer of remainder bits.
* @param $version (int) version
* @return int number of remainder bits
*/
protected function getRemainder($version) {
return $this->capacity[$version][QRCAP_REMINDER];
}
/**
* Return a version number that satisfies the input code length.
* @param $size (int) input code length (byte)
* @param $level (int) error correction level
* @return int version number
*/
protected function getMinimumVersion($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;
}
}
return -1;
}
/**
* Return the size of length indicator for the mode and version.
* @param $mode (int) encoding mode
* @param $version (int) version
* @return int the size of the appropriate length indicator (bits).
*/
protected function lengthIndicator($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 $mode (int) encoding mode
* @param $version (int) version
* @return int the maximum length (bytes)
*/
protected function maximumWords($mode, $version) {
if ($mode == QR_MODE_ST) {
return 3;
}
if ($version <= 9) {
$l = 0;
} else if ($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 $version (int) version
* @param $level (int) error correction level
* @param $spec (array) an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, # of type2 blocks, # of data code}
* @return array spec
*/
protected function getEccSpec($version, $level, $spec) {
if (count($spec) < 5) {
$spec = array(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 $frame (array) frame
* @param $ox (int) X center coordinate of the pattern
* @param $oy (int) Y center coordinate of the pattern
* @return array frame
*/
protected function putAlignmentMarker($frame, $ox, $oy) {
$finder = array(
"\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 $version (int) version
* @param $frame (array) frame
* @param $width (int) width
* @return array frame
*/
protected function putAlignmentPattern($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 $version (int) version
* @return BCH encoded version information pattern
*/
protected function getVersionPattern($version) {
if (($version < 7) OR ($version > QRSPEC_VERSION_MAX)) {
return 0;
}
return $this->versionPattern[($version - 7)];
}
/**
* Return BCH encoded format information pattern.
* @param $mask (array)
* @param $level (int) error correction level
* @return BCH encoded format information pattern
*/
protected function getFormatInfo($mask, $level) {
if (($mask < 0) OR ($mask > 7)) {
return 0;
}
if (($level < 0) OR ($level > 3)) {
return 0;
}
return $this->formatInfo[$level][$mask];
}
/**
* Put a finder pattern.
* @param $frame (array) frame
* @param $ox (int) X center coordinate of the pattern
* @param $oy (int) Y center coordinate of the pattern
* @return array frame
*/
protected function putFinderPattern($frame, $ox, $oy) {
$finder = array(
"\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
"\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
"\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
"\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
"\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
"\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
"\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
);
for ($y=0; $y < 7; $y++) {
$frame = $this->qrstrset($frame, $ox, ($oy + $y), $finder[$y]);
}
return $frame;
}
/**
* Return a copy of initialized frame.
* @param $version (int) version
* @return Array of unsigned char.
*/
protected function createFrame($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 $version (int) version
* @return Array of unsigned char.
*/
protected function newFrame($version) {
if (($version < 1) OR ($version > QRSPEC_VERSION_MAX)) {
return NULL;
}
if (!isset($this->frames[$version])) {
$this->frames[$version] = $this->createFrame($version);
}
if (is_null($this->frames[$version])) {
return NULL;
}
return $this->frames[$version];
}
/**
* Return block number 0
* @param $spec (array)
* @return int value
*/
protected function rsBlockNum($spec) {
return ($spec[0] + $spec[3]);
}
/**
* Return block number 1
* @param $spec (array)
* @return int value
*/
protected function rsBlockNum1($spec) {
return $spec[0];
}
/**
* Return data codes 1
* @param $spec (array)
* @return int value
*/
protected function rsDataCodes1($spec) {
return $spec[1];
}
/**
* Return ecc codes 1
* @param $spec (array)
* @return int value
*/
protected function rsEccCodes1($spec) {
return $spec[2];
}
/**
* Return block number 2
* @param $spec (array)
* @return int value
*/
protected function rsBlockNum2($spec) {
return $spec[3];
}
/**
* Return data codes 2
* @param $spec (array)
* @return int value
*/
protected function rsDataCodes2($spec) {
return $spec[4];
}
/**
* Return ecc codes 2
* @param $spec (array)
* @return int value
*/
protected function rsEccCodes2($spec) {
return $spec[2];
}
/**
* Return data length
* @param $spec (array)
* @return int value
*/
protected function rsDataLength($spec) {
return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]);
}
/**
* Return ecc length
* @param $spec (array)
* @return int value
*/
protected function rsEccLength($spec) {
return ($spec[0] + $spec[3]) * $spec[2];
}
// - - - - - - - - - - - - - - - - - - - - - - - - -
// QRrs
/**
* Initialize a Reed-Solomon codec and add it to existing rsitems
* @param $symsize (int) symbol size, bits
* @param $gfpoly (int) Field generator polynomial coefficients
* @param $fcr (int) first root of RS code generator polynomial, index form
* @param $prim (int) primitive element to generate polynomial roots
* @param $nroots (int) RS code generator polynomial degree (number of roots)
* @param $pad (int) padding bytes at front of shortened block
* @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
*/
protected function init_rs($symsize, $gfpoly, $fcr, $prim, $nroots, $pad) {
foreach ($this->rsitems as $rs) {
if (($rs['pad'] != $pad) OR ($rs['nroots'] != $nroots) OR ($rs['mm'] != $symsize)
OR ($rs['gfpoly'] != $gfpoly) OR ($rs['fcr'] != $fcr) OR ($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 $rs (array) RS values
* @param $x (int) X position
* @return int X osition
*/
protected function modnn($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 $symsize (int) symbol size, bits
* @param $gfpoly (int) Field generator polynomial coefficients
* @param $fcr (int) first root of RS code generator polynomial, index form
* @param $prim (int) primitive element to generate polynomial roots
* @param $nroots (int) RS code generator polynomial degree (number of roots)
* @param $pad (int) padding bytes at front of shortened block
* @return array Array of RS values:<ul><li>mm = Bits per symbol;</li><li>nn = Symbols per block;</li><li>alpha_to = log lookup table array;</li><li>index_of = Antilog lookup table array;</li><li>genpoly = Generator polynomial array;</li><li>nroots = Number of generator;</li><li>roots = number of parity symbols;</li><li>fcr = First consecutive root, index form;</li><li>prim = Primitive element, index form;</li><li>iprim = prim-th root of 1, index form;</li><li>pad = Padding bytes in shortened block;</li><li>gfpoly</ul>.
*/
protected function init_rs_char($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) OR ($symsize > 8)) {
return $rs;
}
if (($fcr < 0) OR ($fcr >= (1<<$symsize))) {
return $rs;
}
if (($prim <= 0) OR ($prim >= (1<<$symsize))) {
return $rs;
}
if (($nroots < 0) OR ($nroots >= (1<<$symsize))) {
return $rs;
}
if (($pad < 0) OR ($pad >= ((1<<$symsize) -1 - $nroots))) {
return $rs;
}
$rs = array();
$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 $rs (array) RS values
* @param $data (array) data
* @param $parity (array) parity
* @return parity array
*/
protected function encode_rs_char($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
//============================================================+
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