Method encodeMask

text-to-qr/lib/phpqrcode/phpqrcode.php:2971–3043

----------------------------------------------------------------------

(QRinput $input, $mask)

        
        //----------------------------------------------------------------------
        public function encodeMask(QRinput $input, $mask)
        {
            if($input->getVersion() < 0 || $input->getVersion() > QRSPEC_VERSION_MAX) {
                throw new Exception('wrong version');
            }
            if($input->getErrorCorrectionLevel() > QR_ECLEVEL_H) {
                throw new Exception('wrong level');
            }

            $raw = new QRrawcode($input);
            
            QRtools::markTime('after_raw');
            
            $version = $raw->version;
            $width = QRspec::getWidth($version);
            $frame = QRspec::newFrame($version);
            
            $filler = new FrameFiller($width, $frame);
            if(is_null($filler)) {
                return NULL;
            }

            // inteleaved data and ecc codes
            for($i=0; $i<$raw->dataLength + $raw->eccLength; $i++) {
                $code = $raw->getCode();
                $bit = 0x80;
                for($j=0; $j<8; $j++) {
                    $addr = $filler->next();
                    $filler->setFrameAt($addr, 0x02 | (($bit & $code) != 0));
                    $bit = $bit >> 1;
                }
            }
            
            QRtools::markTime('after_filler');
            
            unset($raw);
            
            // remainder bits
            $j = QRspec::getRemainder($version);
            for($i=0; $i<$j; $i++) {
                $addr = $filler->next();
                $filler->setFrameAt($addr, 0x02);
            }
            
            $frame = $filler->frame;
            unset($filler);
            
            
            // masking
            $maskObj = new QRmask();
            if($mask < 0) {
            
                if (QR_FIND_BEST_MASK) {
                    $masked = $maskObj->mask($width, $frame, $input->getErrorCorrectionLevel());
                } else {
                    $masked = $maskObj->makeMask($width, $frame, (intval(QR_DEFAULT_MASK) % 8), $input->getErrorCorrectionLevel());
                }
            } else {