Hi @bernhard,
thank you for the module, which is helpful in keeping the project structure clean.
I also use the MPDF barcode component to generate QR codes of the page URL.
For this it was necessary to add the MPDF QR Code library to the RockPDF module using following command inside the /site/modules/RockPdf directory:
$ composer require mpdf/qrcode
It would be great if this was already available in the basic version of the module so as not to jeopardize the upgradeability.
What do you think, is it interesting to add or rather an unusual special case?