Method makeMask

text-to-qr/lib/phpqrcode/phpqrcode.php:2651–2658

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($width, $frame, $maskNo, $level)

        
        //----------------------------------------------------------------------
        public 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;
        }
        
        //----------------------------------------------------------------------
        public function calcN1N3($length)