[NTG-context] Adjust kerning with superscript

Hans Hagen j.hagen at xs4all.nl
Mon Apr 15 11:06:00 CEST 2019


On 4/15/2019 9:50 AM, Henri Menke wrote:
> Dear list,
> 
> I am unhappy with how some fonts kern particular subscripts.  For example in
> the default Latin Modern, subscripts to the Greek capital gamma could use some
> negative kerning.  Because I can't (and don't want to) fix the font, I thought
> that I could patch the font on-the-fly in ConTeXt.
> 
> The usual approach with fonts.handlers.otf.addfeature works well in math mode,
> but does not extend into subscripts (MWE below).  Is there a method to adjust
> subscript kernings?  Could this be done using mathkerns?  Latin Modern doesn't
> have any but maybe they can be added on the fly.
> 
> Cheers, Henri
> 
> ---
> 
> \startluacode
> fonts.handlers.otf.addfeature {
>      type = "kern",
>      name = "kern",
>      data = { [0x0393] = { [0x0030] = -200 } }
> }
> \stopluacode
> 
> \setupbodyfont[modern]
> 
> \starttext
> $\Gamma0$ % works fine :)
> 
> $\Gamma_0$ % doesn't work :(
> \stoptext
see pagella-math.lfg


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