[lltx] rand feature in fontspec / microtype

Arno Trautmann Arno.Trautmann at gmx.de
Fri Dec 31 13:50:24 CET 2010

Khaled Hosny wrote:
> On Fri, Dec 31, 2010 at 12:05:40PM +0100, Arno Trautmann wrote:
>> Hi all,
>> I just found out about the rand feature (e.g. in the Punk Nova font) and
>> wondered if there was a fontspec key for it. Would be nice to have
>> something like \fontspec[Random]{fontname} instead of using
>> \fontspec{fontnamed:rand}. Is this planned/possible?
> There is no fontspec key for it right now, but should not be hard to
> add. In the meantime you should use RawFeatures={+rand}, appending
> features to font name is highly discouraged.

Ok; why?
The greatest effect of such a key would surely be the documentation of
it. I had to guess it while trying to play around with the Punk Nova.
(That would make a great example in the documentation, too ;) )

>> Something quite different: What are the reasons that there is no support
>> für microtype in fontspec so far? As far as I can see, microtypographic
>> features are possible by setting \pdfprotrudechars and \pdfadjustspacing
>> and loading fonts with :protrusion=default and :expansion=default. But I
>> guess there must be something more or else it would already be present
>> in fontspec, wouldn't it? Or is it difficult to use non-default values
>> and therefore no support?
> Mostly because I couldn't figure out a good user interface for it, I
> hear microtype now works with luatex/fontspec, but I did not try it
> myself. An undocumented feature of luaotfload is the support for 'obpd'
> feature, so if the font have set protrusion values for glyphs it can be
> used, I've not seen any fonts using it but I intend to use it for my
> Arabic fonts (it is the only way to set protrusion of unencoded glyphs
> in a portable way).

Ok; would be nice if it could also be documented ;)


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