[Bug 16958] New: Feature request: setting some OpenType layout tags for each font

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16958

           Summary: Feature request: setting some OpenType layout tags for
                    each font
           Product: fontconfig
           Version: 2.5
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: low
         Component: library
        AssignedTo: keithp at keithp.com
        ReportedBy: gaburici at cs.umd.edu
                CC: fedora-fonts-bugs-list at redhat.com


It would be nice if one could specify some default OpenType tag settings for
each font, much like one can specify the anti-aliasing mode etc. Some examples
where I think this is useful:
- choosing some stylistic alternates (salt), for instance DejaVu Sans has more
easily distinguishable capital I and capital J that can be accessed by turning
on salt. It's a bit unreasonable for the user to have to do this in every
application, even if all applications supported this feature...
- switching to tabular figures (tnum) for fonts that default to proportional
figures. Most applications expect figures to be monospaced. If a font doesn't
default to this, things like tables or line numbering can look pretty bad.
Granted, the proper way for apps to do this would be to request this feature
when needed, e.g. one can do this with XeTeX. But most apps are unaware of
OpenType features today...


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