Re: LuaTeX + microtype: Small Caps vs. Letter Spacing

[Ulrike Fischer <news3@nililand.de>]

Am Wed, 15 Jun 2011 11:48:10 +0200 schrieb Hans Hagen:

> On 15-6-2011 10:59, Ulrike Fischer wrote:
> 
>> With ConTeXt  ver: 2011.06.13 23:08 MKIV  fmt: 2011.6.15  (from the
>> minimals) the following fails:
> 
> I have to admit that I never used \letterspacefont (luatex offers it as 
> a pdftex compatibility feature and as such it's strongly related to 
> traditional font handling). The command makes a copy of an internal 
> (tfm) + adapted metrics.
> 
>> \starttext
>>
>> \font\test=file:fxlr.otf
>> \test abc \letterspacefont\lspfont=\font 500 \lspfont blub
> 
> base mode i.e. traditional, so it works


> So, when someone wants that feature he/she'd better force basemode which 
> is no big deal as letterspacing is selectively applied to often known / 
> specially defined fonts.

Ah. Ok that explains it. This means that in latex/fontspec it works
with \setmainfont[Renderer=basic]{...}.

> Anyhow, context users will not use that command / method but instead use 
> \kerncharacters[fraction], as in:
> 
> {test {\kerncharacters[.5] test \bf test} test}

\kerncharacters is define in typo-krn. As far as I can see from
luatex-fonts.lua the generic code doesn't load typo-krn. Does that
mean that letterspacing in node-mode with latex would need some new
code?

-- 
Ulrike Fischer 

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