Dear good friends from Poland,
here at Debian recently a problem surfaced with respect to the
OpenType TeX Gyre fonts.
The problem is that the ligatures are named
f_i
etc while display engines like poppler, as well as the orginal
PostScript fonts, use
fi
etc.
In Debian and Ubuntu, currently the TeX Gyre fonts provide the
*standard* postscript fonts, due to be considered generally
better.
But that means, that at the current moment of one uses the TeX Gyre
fonts as a replacement for the PS fonts, the ligatures will not be
rendered at all.
This was not the case originally, when we introduced that, but after
some poppler upgrade the ligatures f_i etc are not accepted anymore.
Related bug reports are:
* Debian BTS: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=742767
* FreeDesktop: https://bugs.freedesktop.org/show_bug.cgi?id=73291
Unfortunately the poppler maintainers do not seem to like to add
additional variants to be checked.
In the Debian bug report a renaming of glyph fontforge script
has been suggested, but trying that resulted in a very different
fonts (at least from the table sizes and total font size), so I
am very reluctant to use this script. (See below for the core part)
Do you have any suggestion concerning this unfortunate situation?
I see a few options at the moment:
* Adapting the fonts from your side.
This would be my preferred way, of course. But since I don't know
any further implications, I cannot decide on that.
* Adapting the fonts on the Debian side:
I don't want to do this, since we would have different fonts then
the rest of the world, and that is not good.
* Dropping TeX Gyre as substitute for the PS fonts:
The simplest option, but would hemper font quality rendering
in many projects.
I would be very grateful if you could let me know your opinion.
All the best
Norbert
fontforge script core part:
Select(0xFB00)
SetGlyphName("ff")
Select(0xFB01)
SetGlyphName("fi")
Select(0xFB02)
SetGlyphName("fl")
Select(0xFB03)
SetGlyphName("ffi")
Select(0xFB04)
SetGlyphName("ffl")
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PREINING, Norbert http://www.preining.info
JAIST, Japan TeX Live & Debian Developer
GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13
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