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

On Thu, Mar 15, 2018 at 9:24 PM, Mikael P. Sundqvist <mic...@gmail.com>
wrote:

> On Thu, Mar 15, 2018 at 11:00 AM, Hans Hagen <pra...@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
>>> %%%
>>>
>>>
>>> ____________________________________________________________
>>> _______________________
>>> to the Wiki!
>>>
>>> maillist : ntg-context@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
>>> ____________________________________________________________
>>> _______________________
>>>
>>>
>>
>> --
>>
>> -----------------------------------------------------------------
>>                                           Hans Hagen | PRAGMA ADE
>>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>>        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
>> -----------------------------------------------------------------
>> ____________________________________________________________
>> _______________________
>> the Wiki!
>>
>> maillist : ntg-context@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
>

I was too quick. Look at the distance between the integral sign and the
limits in the attached example. Is there a way to fix that?

/Mikael

\definefontfeature[mathextra][collapseitalics=yes]
\setupbodyfont[bonum]

\setupmathematics[
integral=nolimits,
]

\startTEXpage
$\int_a^b f'(t)\,dt=f(b)-f(a)$
\startformula
\int_a^b f'(t)\,dt=f(b)-f(a)
\stopformula
\stopTEXpage


bonumint.pdf
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