How to create Barcode on PDF in Magento 2.3.x

I am trying to create Barcode in PDF file in Magento 2.3.x Version,

Below code was working in Magento 2.1.8

However this is throwing below error –

PHP Fatal error: Uncaught TypeError: Argument 1 passed to
ZendBarcodeRendererPdf::setResource() must be an instance of
ZendPdfPdfDocument, instance of ZendBarcodeRendererPdf given,
called in /var/www/magento/app/code/MyCompany/Ups/Helper/Custom.php on
line 81

<?php
namespace MycompanyUpsHelper;

use ZendBarcodeBarcode;
use ZendBarcodeRenderer;

use ZendBarcodeRendererPdf;

class Custom extends MagentoFrameworkAppHelperAbstractHelper
{
    protected $_logger;

    protected $_fontPath;

    protected $_pdf;

    public function __construct(
        PsrLogLoggerInterface $logger,
        MagentoFrameworkModuleDirReader $configReader,
        Pdf $pdf
    )
    {
        $this->_logger = $logger;
        $this->_fontPath = $configReader->getModuleDir('etc', 'Mycompany_Ups') . '/lib/fonts/';
        $this->_pdf = $pdf;
    }

    public function getOrderConfirmationPdf($order)
    {
        try {
            $pdf = new Zend_Pdf();
            $page = new Zend_Pdf_Page(Zend_Pdf_Page::SIZE_A4);

            $color1 = new Zend_Pdf_Color_GrayScale(0.0);   // (float number). 0.0 (black) - 1.0 (white)

            $font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA_BOLD);
            $page->setFont($font,40);

            $page->setFillColor($color1)->drawText('ORDER CONFIRMATION', 60, 720);

            $font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA);
            $page->setFont($font,30.5);
            $page->setFillColor($color1)->drawText('THIS IS NOT A SHIPPING LABEL', 60, 620);

            $page->setFont($font,16.5);
            $page->setFillColor($color1)->drawText('PLACE THIS INSIDE THE SHIPPING CARTON WITH THE', 75, 520);
            $page->setFillColor($color1)->drawText('CONTROL BOARD', 220, 500);
            $page->setFillColor($color1)->drawText('WRITE THE BELOW ORDER CONFIRMATION NUMBER ON', 65, 460);
            $page->setFillColor($color1)->drawText('THE OUTSIDE OF THE SHIPPING CARTON', 125, 440);

            $font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA_BOLD);
            $page->setFont($font,15);
            $page->setFillColor($color1)->drawText('(Order Confirmation Number: '.$order->getIncrementId().')', 145, 370);


            $font = Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA);
            $page->setFont($font,30.5);
            $page->setFillColor($color1)->drawText('THIS IS NOT A SHIPPING LABEL', 60, 100);

            $pdf->pages[] = $page;

/*          Zend_Barcode::setBarcodeFont($this->_fontPath.'helvetica-normal.ttf');
            $barcodeOptions = array('text' => $order->getIncrementId(),'barHeight' => 100,'factor'=> 2.1,'drawText' => TRUE, 'withChecksum' => TRUE, 'stretchText' => TRUE, 'withChecksumInText' => TRUE, 'barThickWidth' => 2, 'barThinWidth' => 2);
            $rendererOptions = array('topOffset' => 530,'leftOffset' => 185); 
            $pdfWithBarcode = Zend_Barcode::factory('code128', 'pdf', $barcodeOptions, $rendererOptions)->setResource($pdf,0)->draw();*/

            Barcode::setBarcodeFont($this->_fontPath.'helvetica-normal.ttf');
            $barcodeOptions = array('text' => 'ZEND-FRAMEWORK');
            $rendererOptions = array();
            $renderer = Barcode::factory('code128', 'pdf', $barcodeOptions, $rendererOptions);
            $renderer->setResource($pdf, $page)->draw();

            $pdf_str = $pdf->render();
            //$pdf->save("/var/www/html/magento2/mage2/pub/From_Helper_".$order->getIncrementId().".pdf");
            unset($pdf);
            return $pdf_str;
        } catch(Exception $e) {
            mail("[email protected]","ORDER CONFIRMATION PDF ERROR: ".$order->getIncrementId(),$e->getMessage);
            return FALSE;
        }
    }
}

I am using this code in Helper in my custom module.

Any help would be appreciated. Thanks in advance.

Below is sample of PDF I want to generate.