[NTG-context] [SPAM] Kerning/italic correction problem with TeX Gyre Bonum font

Mikael P. Sundqvist mickep at gmail.com
Thu Mar 15 21:24:57 CET 2018


On Thu, Mar 15, 2018 at 11:00 AM, Hans Hagen <pragma at wxs.nl> wrote:

> On 3/10/2018 7:10 PM, Mikael P. Sundqvist wrote:
>
>> Hi Hans and others!
>>
>> I don't know if this is a problem with the font itself or if it is
>> ConTeXt. In any case, the test file below gives strange output (attached).
>> In particular the space/kerning after $f$ seems to be off.
>>
>
> the fonts have bad glyph dimensions that assume italics always to be
> applied (as in traditional tex fonts)
>
> you can put this at the top of your file:
>
> \definefontfeature[mathextra][collapseitalics=yes]
>
> awaiting fixed fonts (if they never get fixed we can consider applying
> this feature by default)
>
> Ulrike Fischer reminded me in the StackExchange chat that not so long time
>> ago there was some similar issue with \mathcal P discussed on this list. Is
>> it the same problem? (The input $f \tracinglostchars=0 \Uchar"EEEFF$)
>> indeed makes it look better between the $f$ and the parenthesis.)
>>
>> /Mikael
>>
>> %%%
>> \setupbodyfont[bonum]
>>
>> \starttext
>> \startTEXpage[offset=3bp]
>> (Look at this $f$) and this $f$? (see also $k$?, $x$? and $z$?)
>>
>> There might be more problems (like between $t$ and the parenthesis in
>> $e^t$) is too small.
>>
>> The space between $dx$ and the bar is too small:
>> \startformula
>> \Bigl|\int_0^\pi\sin x\,dx\Bigr|,
>> \stopformula
>> Look at the $f$ and the bar:
>> \startformula
>> \Bigl|\int f\Bigr|
>> \stopformula
>> The $x$ seems to be outside the fraction:
>> \startformula
>> \frac{a^2}{1-x}
>> \stopformula
>> We add another one (in fact two) including $f$:
>> \startformula
>> f\Bigl(\frac{a+b}{2}\Bigr)
>> \stopformula
>>
>> Also look at $\xi_0$ and $\xi_1$, the subscripts are too far away from
>> $\xi$. Compare with $f_0$ and $f_1$, $g_0$ and $g_1$.
>>
>> With $\delta_f$ and $\delta_g$, I think it looks like the space is too
>> big, in particular between $\delta$ and $f$, but maybe that is a matter of
>> taste.
>>
>> \stopTEXpage
>> \stoptext
>> %%%
>>
>>
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>> _______________________
>>
>>
>
> --
>
> -----------------------------------------------------------------
>                                           Hans Hagen | PRAGMA ADE
>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
> ____________________________________________________________
> _______________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context at ntg.nl / http://www.ntg.nl/mailman/list
> info/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ____________________________________________________________
> _______________________


Many thanks, Hans! This works well and it makes the font usable.

I will try to contact the TeX Gyre project to report this issue in the font.

/Mikael
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