Hi why barcode is not showned in print barcode?

I have remove ini_set from php.ini and also set 777 permission to assets/upload
When I check the source code in generate function, I found that $re is true, therefore function exit.


public function generate($text, $bcs = 'code128', $height = 50, $drawText = true, $get_be = false, $re = false)
{
// Barcode::setBarcodeFont('my_font.ttf');
$check = $this->prepareForChecksum($text, $bcs);
$barcodeOptions = ['text' => $check['text'], 'barHeight' => $height, 'drawText' => $drawText, 'withChecksum' => $check['checksum'], 'withChecksumInText' => $check['checksum']]; //'fontSize' => 12, 'factor' => 1.5,
if ($this->Settings->barcode_img) {
$rendererOptions = ['imageType' => 'png', 'horizontalPosition' => 'center', 'verticalPosition' => 'middle'];
if ($re) {
Barcode::render($bcs, 'image', $barcodeOptions, $rendererOptions);
exit;
}