vendor/phpqrcode/qrmask.php

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<?php
/*
 * PHP QR Code encoder
 *
 * Masking
 *
 * Based on libqrencode C library distributed under LGPL 2.1
 * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
 *
 * PHP QR Code is distributed under LGPL 3
 * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
 *
 * This library 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 any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
	define('N1', 3);
	define('N2', 3);
	define('N3', 40);
	define('N4', 10);

	class QRmask {
	
		public $runLength = array();
		
		//----------------------------------------------------------------------
		public function __construct() 
        {
            $this->runLength = array_fill(0, QRSPEC_WIDTH_MAX + 1, 0);
        }
        
        //----------------------------------------------------------------------
        public function writeFormatInformation($width, &$frame, $mask, $level)
        {
            $blacks = 0;
            $format =  QRspec::getFormatInfo($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 {