From: André Szabolcs Szelp (firstname.lastname@example.org)
Date: Fri Nov 07 2008 - 02:26:26 CST
That's great news.
Everyone kept telling me it's a font technology issue, but I was aware
of the fact that no OT feature would handle that as of now.
Good to hear you are working on that.
(Even though implementation will take _years_ for such a specific
feature even after definition, it's the next necessary step).
2008/11/4 John Hudson <email@example.com>:
> Kent Karlsson wrote:
>> It does NOT cover the RTL case, as I wrote. There is not
>> even a loophole (which I think is a bad approach anyway) in
>> the bidi algorithm that would cover Old Hungarian as RTL
>> overridden as LTR to even sometimes produce mirrored glyphs.
> POI: there is an OpenType working group who are spec'ing new layout
> features for LTR/RTL *glyph* mirroring, for inclusion in the v1.6 of the
> OT spec. Unicode provides for some mirroring at the character level,
> while other mirroring must happen at the glyph level, which implies font
> features; and of course the result of glyph mirroring must not reverse
> the result of character mirroring.
> I believe this approach will resolve the kind of glyph mirroring issues
> Kent describes. Indeed, Old Hungarian came up in our discussions as an
> example of a default RTL script that might require an <ltra> variant
> GSUB feature.
> John Hudson
> Tiro Typeworks www.tiro.com
> Gulf Islands, BC firstname.lastname@example.org
> You can't build a healthy democracy with people
> who believe in little green men from Venus.
> -- Arthur C. Clark
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