function __construct(Frame $frame, DOMPDF $dompdf)
 {
     parent::__construct($frame);
     $url = $frame->get_node()->getAttribute("src");
     if (!DOMPDF_ENABLE_REMOTE && strstr($url, "://")) {
         $this->_remote = false;
         $this->_image_url = DOMPDF_LIB_DIR . "/res/broken_image.png";
     } else {
         if (DOMPDF_ENABLE_REMOTE && strstr($url, "://")) {
             // Download remote files to a temporary directory
             $this->_remote = true;
             $this->_image_url = tempnam(DOMPDF_TEMP_DIR, "dompdf_img_");
             file_put_contents($this->_image_url, file_get_contents($url));
         } else {
             $this->_remote = false;
             $this->_image_url = build_url($dompdf->get_protocol(), $dompdf->get_host(), $dompdf->get_base_path(), $url);
         }
     }
     if (!is_readable($this->_image_url) || !filesize($this->_image_url)) {
         $this->_remote = false;
         $this->_image_url = DOMPDF_LIB_DIR . "/res/broken_image.png";
     }
     // We need to preserve the file extenstion
     $i = strrpos($url, ".");
     if ($i === false) {
         throw new DOMPDF_Exception("Unknown image type: {$url}.");
     }
     $this->_image_ext = strtolower(substr($url, $i + 1));
 }