The renumbering subsetter only reads format 4 cmaps. This is a limitation in
computeMapping in the RenumberingCMapTableSubsetter.
Currently there is only a builder for format 4 cmaps, so I'd expect sfntly to
support all 16-bit cmaps and just write them out as format 4, yet it doesn't.
It should also honour the Subsetter's cmapId() list.
For 32-bit cmaps a format 12 builder is needed.
Original issue reported on code.google.com by
j...@jahewson.comon 7 Oct 2013 at 9:17