[bug #64344] support arbitrary ligatures

[Dave]

URL:
  <https://savannah.gnu.org/bugs/?64344>

                 Summary: support arbitrary ligatures
                   Group: GNU roff
               Submitter: barx
               Submitted: Sun 25 Jun 2023 10:52:14 AM CDT
                Category: Core
                Severity: 1 - Wish
              Item Group: Feature change
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None


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Follow-up Comments:


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Date: Sun 25 Jun 2023 10:52:14 AM CDT By: Dave <barx>
Bug #40717 covers modernizing groff's font support, a massive undertaking. 
But even with only PostScript Type 1 support, as groff presently has,
incremental improvements can be made.

One relatively simple one is to expand what ligatures groff recognizes.  The
current hard-coded five (fi, fl, ff, ffi, and ffl) are based on the C/A/T, an
output device that hasn't been relevant in decades.  Type 1 fonts can specify
arbitrary ligatures; a small but significant improvement would be letting
afmtodit generate font description files with these, and having groff use
them.

http://lists.gnu.org/r/groff/2013-11/msg00028.html has some design spitballing
that may or may not prove useful.







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