d function _convert_to_png($image_url, $type)
    {
        $filename = Cache::getTempImage($image_url);

        if ($filename !== null && file_exists($filename)) {
            return $filename;
        }
 
        $func_name = "imagecreatefrom$type";

        set_error_handler([Helpers::class, "record_warnings"]);

        if (!function_exists($func_name)) {
            if (!method_exists(Helpers::class, $func_name)) {
                throw new Exception("Function $func_name() not found.  Cannot convert $type image: $image_url.  Please install the image PHP extension.");
            }
            $func_name = [Helpers::class, $func_name];
        }

        try {
            $im = call_user_func($func_name, $image_url);

            if ($im) {
                imageinterlace($im, false);

                $tmp_dir = $this->_dompdf->getOptions()->getTempDir();
                $tmp_name = @tempnam($tmp_dir, "{$type}_dompdf_img_");
                @unlink($tmp_name);
                $filename = "$tmp_name.png";

                imagepng($im, $filename);
                imagedestroy($im);
            } else {
                $filename = null;
            }
        } finally {
            restore_error_handler();
        }

        if ($filename !== null) {
            Cache::addTempImage($image_url, $filename);
        }

        return $filename;
    }

    public function image($img, $x, $y, $w, $h, $resolution = "normal")
    {
        [$width, $height, $type] = Helpers::dompdf_getimagesize($img, $this->get_dompdf()->getHttpContext());

        $debug_png = $this->_dompdf->getOptions()->getDebugPng();

        if ($debug_png) {
            print "[image:$img|$width|$height|$type]";
        }

        switch ($type) {
            case "jpeg":
                if ($debug_png) {
                    print '!!!jpg!!!';
                }
                $this->_pdf->addJpegFromFile($img, $x, $this->y($y) - $h, $w, $h);
                break;

            case "webp":
            /** @noinspection PhpMissingBreakStatementInspection */
            case "gif":
            /** @noinspection PhpMissingBreakStatementInspection */
            case "bmp":
                if ($debug_png) print "!!!{$type}!!!";
                $img = $this->_convert_to_png($img, $type);
                if ($img === null) {
                    if ($debug_png) print '!!!conversion to PDF failed!!!';
                    $this->image(Cache::$broken_image, $x, $y, $w, $h, $resolution);
                    break;
                }

            case "png":
                if ($debug_png) print '!!!png!!!';

                $this->_pdf->addPngFromFile($img, $x, $this->y($y) - $h, $w, $h);
                break;

            case "svg":
                if ($debug_png) print '!!!SVG!!!';

                $this->_pdf->addSvgFromFile($img, $x, $this->y($y) - $h, $w, $h);
                break;

            default:
                if ($debug_png) print '!!!unknown!!!';
        }
    }

    public function select($x, $y, $w, $h, $font, $size, $color = [0, 0, 0], $opts = [])
    {
        $pdf = $this->_pdf;

        $font .= ".afm";
        $pdf->selectFont($font);

        if (!isset($pdf->acroFormId)) {
            $pdf->addForm();
        }

        $ft = \Dompdf\Cpdf::ACROFORM_FIELD_CHOICE;
        $ff = \Dompdf\Cpdf::ACROFORM_FIELD_CHOICE_COMBO;

        $id = $pdf->addFormField($ft, rand(), $x, $this->y($y) - $h, $x + $w, $this->y($y), $ff, $size, $color);
        $pdf->setFormFieldOpt($id, $opts);
    }

    public function textarea($x, $y, $w, $h, $font, $size, $color = [0, 0, 0])
    {
        $pdf = $this->_pdf;

        $font .= ".afm";
        $pdf->selectFont($font);

        if (!isset($pdf->acroFormId)) {
            $pdf->addForm();
        }

        $ft = \Dompdf\Cpdf::ACROFORM_FIELD_TEXT;
        $ff = \Dompdf\Cpdf::ACROFORM_FIELD_TEXT_MULTILINE;

        $pdf->addFormField($ft, rand(), $x, $this->y($y) - $h, $x + $w, $this->y($y), $ff, $size, $color);
    }

    public function input($x, $y, $w, $h, $type, $font, $size, $color = [0, 0, 0])
    {
        $pdf = $this->_pdf;

        $font .= ".afm";
        $pdf->selectFont($font);

        if (!isset($pdf->acroFormId)) {
            $pdf->addForm();
        }

        $ft = \Dompdf\Cpdf::ACROFORM_FIELD_TEXT;
        $ff = 0;

        switch ($type) {
            case 'text':
                $ft = \Dompdf\Cpdf::ACROFORM_FIELD_TEXT;
                break;
            case 'password':
                $ft = \Dompdf\Cpdf::ACROFORM_FIELD_TEXT;
                $ff = \Dompdf\Cpdf::ACROFORM_FIELD_TEXT_PASSWORD;
                break;
            case 'submit':
                $ft = \Dompdf\Cpdf::ACROFORM_FIELD_BUTTON;
                break;
        }

        $pdf->addFormField($ft, rand(), $x, $this->y($y) - $h, $x + $w, $this->y($y), $ff, $size, $color);
    }

    public function text($x, $y, $text, $font, $size, $color = [0, 0, 0], $word_space = 0.0, $char_space = 0.0, $angle = 0.0)
    {
        $pdf = $this->_pdf;

        $this->_set_fill_color($color);

        $is_font_subsetting = $this->_dompdf->getOptions()->getIsFontSubsettingEnabled();
        $pdf->selectFont($font . '.afm', '', true, $is_font_subsetting);

        $pdf->addText($x, $this->y($y) - $pdf->getFontHeight($size), $size, $text, $angle, $word_space, $char_space);

        $this->_set_fill_transparency("Normal", $this->_current_opacity);
    }

    public function javascript($code)
    {
        $this->_pdf->addJavascript($code);
    }

    //........................................................................

    public function add_named_dest($anchorname)
    {
        $this->_pdf->addDestination($anchorname, "Fit");
    }

    public function add_link($url, $x, $y, $width, $height)
    {
        $y = $this->y($y) - $height;

        if (strpos($url, '#') === 0) {
            // Local link
            $name = substr($url, 1);
            if ($name) {
                $this->_pdf->addInternalLink($name, $x, $y, $x + $width, $y + $height);
            }
        } else {
            $this->_pdf->addLink($url, $x, $y, $x + $width, $y + $height);
        }
    }

    /**
     * @throws FontNotFoundException
     */
    public function get_text_width($text, $font, $size, $word_spacing = 0.0, $char_spacing = 0.0)
    {
        $this->_pdf->selectFont($font, '', true, $this->_dompdf->getOptions()->getIsFontSubsettingEnabled());
        return $this->_pdf->getTextWidth($size, $text, $word_spacing, $char_spacing);
    }

    /**
     * @throws FontNotFoundException
     */
    public function get_font_height($font, $size)
    {
        $options = $this->_dompdf->getOptions();
        $this->_pdf->selectFont($font, '', true, $options->getIsFontSubsettingEnabled());

        return $this->_pdf->getFontHeight($size) * $options->getFontHeightRatio();
    }

    /*function get_font_x_height($font, $size) {
      $this->_pdf->selectFont($font);
      $ratio = $this->_dompdf->getOptions()->getFontHeightRatio();
      return $this->_pdf->getFontXHeight($size) * $ratio;
    }*/

    /**
     * @throws FontNotFoundException
     */
    public function get_font_baseline($font, $size)
    {
        $ratio = $this->_dompdf->getOptions()->getFontHeightRatio();
        return $this->get_font_height($font, $size) / $ratio;
    }

    /**
     * Processes a callback or script on every page.
     *
     * The callback function receives the four parameters `int $pageNumber`,
     * `int $pageCount`, `Canvas $canvas`, and `FontMetrics $fontMetrics`, in
     * that order. If a script is passed as string, the variables `$PAGE_NUM`,
     * `$PAGE_COUNT`, `$pdf`, and `$fontMetrics` are available instead. Passing
     * a script as string is deprecated and will be removed in a future version.
     *
     * This function can be used to add page numbers to all pages after the
     * first one, for example.
     *
     * @param callable|string $callback The callback function or PHP script to process on every page
     */
    public function page_script($callback): void
    {
        if (is_string($callback)) {
            $this->processPageScript(function (
                int $PAGE_NUM,
                int $PAGE_COUNT,
                self $pdf,
                FontMetrics $fontMetrics
            ) use ($callback) {
                eval($callback);
            });
            return;
        }

        $this->processPageScript($callback);
    }

    public function page_text($x, $y, $text, $font, $size, $color = [0, 0, 0], $word_space = 0.0, $char_space = 0.0, $angle = 0.0)
    {
        $this->processPageScript(function (int $pageNumber, int $pageCount) use ($x, $y, $text, $font, $size, $color, $word_space, $char_space, $angle) {
            $text = str_replace(
                ["{PAGE_NUM}", "{PAGE_COUNT}"],
                [$pageNumber, $pageCount],
                $text
            );
            $this->text($x, $y, $text, $font, $size, $color, $word_space, $char_space, $angle);
        });
    }

    public function page_line($x1, $y1, $x2, $y2, $color, $width, $style = [])
    {
        $this->processPageScript(function () use ($x1, $y1, $x2, $y2, $color, $width, $style) {
            $this->line($x1, $y1, $x2, $y2, $color, $width, $style);
        });
    }

    /**
     * @return int
     */
    public function new_page()
    {
        $this->_page_number++;
        $this->_page_count++;

        $ret = $this->_pdf->newPage();
        $this->_pages[] = $ret;
        return $ret;
    }

    protected function processPageScript(callable $callback): void
    {
        $pageNumber = 1;

        foreach ($this->_pages as $pid) {
            $this->reopen_object($pid);

            $fontMetrics = $this->_dompdf->getFontMetrics();
            $callback($pageNumber, $this->_page_count, $this, $fontMetrics);

            $this->close_object();
            $pageNumber++;
        }
    }

    public function stream($filename = "document.pdf", $options = [])
    {
        if (headers_sent()) {
            die("Unable to stream pdf: headers already sent");
        }

        if (!isset($options["compress"])) $options["compress"] = true;
        if (!isset($options["Attachment"])) $options["Attachment"] = true;

        $debug = !$options['compress'];
        $tmp = ltrim($this->_pdf->output($debug));

        header("Cache-Control: private");
        header("Content-Type: application/pdf");
        header("Content-Length: " . mb_strlen($tmp, "8bit"));

        $filename = str_replace(["\n", "'"], "", basename($filename, ".pdf")) . ".pdf";
        $attachment = $options["Attachment"] ? "attachment" : "inline";
        header(Helpers::buildContentDispositionHeader($attachment, $filename));

        echo $tmp;
        flush();
    }

    public function output($options = [])
    {
        if (!isset($options["compress"])) $options["compress"] = true;

        $debug = !$options['compress'];

        return $this->_pdf->output($debug);
    }

    /**
     * Returns logging messages generated by the Cpdf class
     *
     * @return string
     */
    public function get_messages()
    {
        return $this->_pdf->messages;
    }
}