[NTG-context] OK, I Don't Quite Understand \definefontfamily

[Wolfgang Schuster]

Michael Urban schrieb am 28.09.2020 um 23:49:
> 
> 
>> On Sep 28, 2020, at 12:39 PM, Wolfgang Schuster <wolfgang.schuster.lists at gmail.com> wrote:
>>
>> Michael Urban schrieb am 25.09.2020 um 21:12:
>>> I don't seem quite able to put it all together, forgive the question.
>>> I have a 'Bookman' font setup, pretty vanilla:
>>> \definetypeface [Bookman] [rm] [serif] [bonum] [sl=name:unituscndboldoblique]
>>> \definetypeface [Bookman] [tt] [mono]  [modern] [default]
>>> \definetypeface [Bookman] [ss] [sans] [unitus] [default]
>>> \definetypeface [Bookman] [mm] [math] [modern] [default]
>>> (Unitus is the fontsite 500 'Univers' substitute, works fine)
>>> Now, the built-in gyre bonum font doesn't have a slanted/oblique variant, so if I have Bookman as my main body
>>> font, \sl  produces (unsurprisingly) the same result as \it, TexGyreBonum-Italic.   If I want \sl to summon
>>> Latin Modern for the variant, I have tried variations on
>>> \definetypeface [Bookman] [rm] [serif] [bonum] [sl=file:Latin Modern Roman Slanted]
>>> but to no avail — not helped by the fact that the \definetypeface contextgarden page doesn't have any pointer to just what that fifth
>>> argument can contain.
>>
>> https://wiki.contextgarden.net/Command/definetypeface
>>
>>> How do I accomplish this?
>>
>> Use \definefontfamily which is missing in your example.
>>
>> \definefontfamily [Bookman] [rm] [TeX Gyre Bonum]
>>   [sl=features:{*,slanted},
>>    bs=features:{*,slanted}]
>>
>> \definetypeface [Bookman] [mm] [math] [modern] [default]
>>
>> \setupbodyfont [Bookman]
>>
>> \starttext
>> \tf upright \it italic \sl slanted \bf bold \bi bolditalic \bs boldslanted
>> \stoptext
>>
>> Wolfgang
> 
> Except that this does not work, because, as I said, the Gyre Bonum font has no builtin slanted version.

Have you even taken a look at the output of my example?

> So, I want to use some other font (like Latin Modern) for a substitute for \sl .

I still think my version looks better (even with bold Latin Modern).

\definefontfamily [slantedbookman] [rm] [TeX Gyre Bonum]
   [sl={style:regular,features:{*,slanted}},
    bs={style:bold,features:{*,slanted}}]

\definefontfamily [modernbookman] [rm] [TeX Gyre Bonum]
   [sl={file:lmromanslant10-regular},
    bs={file:lmromanslant10-bold}]

% \definefontfamily [modernbookman] [rm] [TeX Gyre Bonum]
%   [sl={file:lmromanslant10-regular,features:{*,boldened}},
%    bs={file:lmromanslant10-bold,features:{*,boldened}}]

\starttext

\setupbodyfont [slantedbookman]

\it italic \sl slanted \bi bolditalic \bs boldslanted

\setupbodyfont [modernbookman]

\it italic \sl slanted \bi bolditalic \bs boldslanted

\stoptext

Wolfgang