[luatex] How to access user-defined kerning

[Herbert Voss]

Am 20.04.2018 um 05:52 schrieb Henri Menke:

> I'm trying to determine the kerning between two letters (here A and V).  For the
> sake of this example I'm inserting negative kerning of -400/1000 em.  However,
> when I examine the kern in the kerning callback this massive enhancement of the
> negative kern doesn't show up but I only see the kerning from the font itself.
>
> How can I access the user-defined kerns?  MWE is below.

no problem with

\input luaotfload.sty

\directlua{
   fonts.handlers.otf.addfeature{
     name = "ktest",
     type = "kern",
     data = {
       ["A"] = { ["V"] =  -400 } } % make them overlap for the example
   }
}

AV

\font\test="Latin Modern Roman:+ktest" at 11pt
\test
AV

\bye


This is LuaTeX, Version 1.07.0 (TeX Live 2018)


Herbert
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