This is not possible for several reasons, one of which being that as mark-r says, Unicode defines the characters themselves; hence why a font works so well. Th

This is not possible for several reasons, one of which being that as mark-r says, Unicode defines the characters themselves; hence why a font works so well. The second reason is that there are a LOT of barcode algorithms, so you would be duplicating the entire encodable codeblock (which is sometimes larger than ascii) a bunch of times. The third issue is that barcode algorithms are not usually literal 1:1 stand ins. Barcodes usually have the equivalent of a header and footer, and often, a character will influence how the next one looks. At a guess, this font can (and probably does) handle that with font ligatures.