[NTG-context] Adjust kerning with superscript

Henri Menke henrimenke at gmail.com
Mon Apr 15 11:23:51 CEST 2019



On 15/04/19 9:06 PM, Hans Hagen wrote:
> 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

Thanks for the hint.  Is there a possibility to do this without goodies?  They
are not available in generic.

Cheers, Henri

> 
> 
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