public function generate($params = array())
 {
     if (isset($params['black']) && is_array($params['black']) && count($params['black']) == 3 && array_filter($params['black'], 'is_int') === $params['black']) {
         QRimage::$black = $params['black'];
     }
     if (isset($params['white']) && is_array($params['white']) && count($params['white']) == 3 && array_filter($params['white'], 'is_int') === $params['white']) {
         QRimage::$white = $params['white'];
     }
     $params['data'] = isset($params['data']) ? $params['data'] : 'QR Code Library';
     if (isset($params['savename'])) {
         $level = 'L';
         if (isset($params['level']) && in_array($params['level'], array('L', 'M', 'Q', 'H'))) {
             $level = $params['level'];
         }
         $size = 4;
         if (isset($params['size'])) {
             $size = min(max((int) $params['size'], 1), 10);
         }
         QRcode::png($params['data'], $params['savename'], $level, $size, 2);
         return $params['savename'];
     } else {
         $level = 'L';
         if (isset($params['level']) && in_array($params['level'], array('L', 'M', 'Q', 'H'))) {
             $level = $params['level'];
         }
         $size = 4;
         if (isset($params['size'])) {
             $size = min(max((int) $params['size'], 1), 10);
         }
         QRcode::png($params['data'], NULL, $level, $size, 2);
     }
 }

 public static function buildCache()
 {
     QRtools::markTime('before_build_cache');
     $mask = new QRmask();
     for ($a = 1; $a <= QRSPEC_VERSION_MAX; $a++) {
         $frame = QRspec::newFrame($a);
         if (QR_IMAGE) {
             $fileName = QR_CACHE_DIR . 'frame_' . $a . '.png';
             QRimage::png(self::binarize($frame), $fileName, 1, 0);
         }
         $width = count($frame);
         $bitMask = array_fill(0, $width, array_fill(0, $width, 0));
         for ($maskNo = 0; $maskNo < 8; $maskNo++) {
             $mask->makeMaskNo($maskNo, $width, $frame, $bitMask, true);
         }
     }
     QRtools::markTime('after_build_cache');
 }

 public function encodePNG($intext, $outfile = false, $saveandprint = false)
 {
     try {
         ob_start();
         $tab = $this->encode($intext);
         $err = ob_get_contents();
         ob_end_clean();
         if ($err != '') {
             QRtools::log($outfile, $err);
         }
         $maxSize = (int) (QR_PNG_MAXIMUM_SIZE / (count($tab) + 2 * $this->margin));
         QRimage::png($tab, $outfile, min(max(1, $this->size), $maxSize), $this->margin, $saveandprint);
     } catch (Exception $e) {
         QRtools::log($outfile, $e->getMessage());
     }
 }

 public function encodeJPG($intext, $outfile = false, $q = 85, $rgb_color = '0,0,0', $rgb_bg_color = '255,255,255')
 {
     try {
         ob_start();
         $tab = $this->encode($intext);
         $err = ob_get_contents();
         ob_end_clean();
         if ($err != '') {
             QRtools::log($outfile, $err);
         }
         $maxSize = (int) (QR_JPG_MAXIMUM_SIZE / (count($tab) + 2 * $this->margin));
         QRimage::jpg($tab, $outfile, min(max(1, $this->size), $maxSize), $this->margin, $q, $rgb_color, $rgb_bg_color);
     } catch (Exception $e) {
         QRtools::log($outfile, $e->getMessage());
     }
 }

            $out[] = '';
        } else {
            $out[] = $matches[0][3];
        }
    }
    return $out;
}
// validate signature
list($key, $salt) = qsot_fetch_defines(array('NONCE_KEY', 'NONCE_SALT'), $d['p']);
$test = sha1($key . @json_encode($d) . $salt);
if ($test != $sig) {
    die($debug ? '<!-- hash mismatch : ' . $sig . ' / ' . $test . ' -->' : '');
}
// end abuse protection
include_once 'qrlib.php';
//QRCode::png($d, false, 'L', 3, 1);
$enc = QRencode::factory('L', 3, 1);
$outfile = false;
try {
    ob_start();
    $tab = $enc->encode($d['d']);
    $err = ob_get_contents();
    ob_end_clean();
    if ($err != '') {
        QRtools::log($outfile, $err);
    }
    $maxSize = (int) (QR_PNG_MAXIMUM_SIZE / (count($tab) + 2 * $enc->margin));
    QRimage::jpg($tab, $outfile, 2.5, $enc->margin, 100);
} catch (Exception $e) {
    QRtools::log($outfile, $e->getMessage());
}