[bug #60587] Allow font files to specify kern pairs for characters in different fonts

[Dave]

URL:
  <https://savannah.gnu.org/bugs/?60587>

                 Summary: Allow font files to specify kern pairs for
characters in different fonts
                 Project: GNU troff
            Submitted by: barx
            Submitted on: Wed 12 May 2021 12:32:59 AM CDT
                Category: Core
                Severity: 1 - Wish
              Item Group: New feature
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

Font files can presently specify kerning data only for pairs of characters
that are both in the same font.  A mechanism should also exist that can
globally specify kerning information for pairs of characters that are in
different fonts.

Bug #44715 seeks to document the current limitation, which is useful in the
short term, but in the longer term, it would be better for the limitation to
be removed.

(I first floated this idea in a comment in bug #44244, but that feature
request has a different purpose, so I submit this separate feature request
specifically for this suggestion.)




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