Follow-up Comment #4, bug #68136 (group groff): Hi Dave,
The PDF Reference says:-
For a font subset, the PostScript name of the font—the value of the
font’s
BaseFont entry and the font descriptor’s FontName entry—begins with a tag
followed by a plus sign (+). The tag consists of exactly six uppercase
letters; the
choice of letters is arbitrary, but different subsets in the same PDF file
must have
different tags. For example, EOODIA+Poetica is the name of a subset of
Poetica®, a
Type 1 font. (See implementation note 45 in Appendix H.)
So characters 0-9 are not allowed. The tag only needs to be unique when
attached to the base font name so AAAAAA+Helvetica and AAAAAA+TimesRoman would
be Ok. This makes duplication unlikely since the glyphs for most character
based languages fit into one subset. There is a slight risk with CJK fonts
since a single document may contain 1000s of different glyphs, which would
require multiple subsets of the same base font, but I think I can live with
it. (Its worse odds than winning the UK lottery).
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?68136>
_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/
signature.asc
Description: PGP signature
