Method evaluateSymbol

text-to-qr/lib/phpqrcode/phpqrcode.php:2690–2753

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

($width, $frame)

        
        //----------------------------------------------------------------------
        public 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;
                    } else if($x > 0) {
                        if((ord($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;
                    } else if($y > 0) {
                        if((ord($frame[$y][$x]) ^ ord($frame[$y-1][$x])) & 1) {
                            $head++;
                            $this->runLength[$head] = 1;
                        } else {
                            $this->runLength[$head]++;
                        }
                    }
                }