How do I insert a barcode into a PDF document
UniPDF allows inserting Go's image object into a PDF document, the Image object could came from other library such as a barcode/qr generator.
Use the following code to import Go's Image object into UniPDF library
c := creator.New() img, err := c.NewImageFromGoImage(imageObj)
Check the code in this link below for a complete example of inserting Image object into a PDF document