[NTG-context] Fallbacks in text font interfere with math accents

[NTG-context] Fallbacks in text font interfere with math accents

[Henning Hraban Ramm via ntg-context]

[-- Attachment #1: Type: text/plain, Size: 1171 bytes --]

Hi, this is probably for Hans & Mikael, but maybe someone else has a hint:

If I set a fallback for my body font to catch all missing characters, 
some math accents get replaced by small bold uppercase characters (I 
found hat by K and ring by T so far).

I tried [fallbacks=] for math to no avail.

My example uses Cambria, but it’s the same with other fonts.

(BTW, in \bar{b} with Libertinus, the bar looks too high.)

Hraban


\definefontfallback[symbolaFB]
   [file:symbola.otf]
   [0x00000-0xFFFFF]
   [check=no,force=no]

\definefontfallback[arialFB]
   [name:arialunicodems]
   [0x00000-0xFFFFF]
   [check=no,force=no,rscale=0.85]

\starttypescript [contextstart]
   \definetypeface [contextstart] [rm] [serif] [cambria]
	[default][fallbacks=symbolaFB]
   \definetypeface [contextstart] [ss] [sans]  [segoe]
	[default][fallbacks=arialFB]
   \definetypeface [contextstart] [tt] [mono]  [modern]
	[default][fallbacks=arialFB]
   \definetypeface [contextstart] [mm] [math]  [cambria]
	[default]
\stoptypescript

\setupbodyfont[contextstart,12pt]

\starttext

\im{\hat{H} \widehat{HAT} \bar{b} \widebar{bar}}

\im{\mathring{+} \mathring{±} \mathring{x}}

\stoptext

[-- Attachment #2: mathtest.tex --]
[-- Type: application/x-tex, Size: 4508 bytes --]

[-- Attachment #3: Type: text/plain, Size: 496 bytes --]

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : https://contextgarden.net
___________________________________________________________________________________

Re: [NTG-context] Fallbacks in text font interfere with math accents

[Mikael Sundqvist via ntg-context]

Hi,

On Sat, Jun 10, 2023 at 10:06 AM Henning Hraban Ramm via ntg-context
<ntg-context@ntg.nl> wrote:
>
> Hi, this is probably for Hans & Mikael, but maybe someone else has a hint:
>
> If I set a fallback for my body font to catch all missing characters,
> some math accents get replaced by small bold uppercase characters (I
> found hat by K and ring by T so far).
>
> I tried [fallbacks=] for math to no avail.
>
> My example uses Cambria, but it’s the same with other fonts.
>
> (BTW, in \bar{b} with Libertinus, the bar looks too high.)

I leave the font fallbacks to Hans or somebody else, but for the \bar
one can argue that the "305 glyph in Libertinus Math sits too high.
This is adjusted for in the goodie file in the next upload.

/Mikael
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : https://contextgarden.net
___________________________________________________________________________________

Re: [NTG-context] Fallbacks in text font interfere with math accents

[Henning Hraban Ramm via ntg-context]

Am 10.06.23 um 19:46 schrieb Mikael Sundqvist via ntg-context:
> Hi,
> 
> On Sat, Jun 10, 2023 at 10:06 AM Henning Hraban Ramm via ntg-context
> <ntg-context@ntg.nl> wrote:
>>
>> Hi, this is probably for Hans & Mikael, but maybe someone else has a hint:
>>
>> If I set a fallback for my body font to catch all missing characters,
>> some math accents get replaced by small bold uppercase characters (I
>> found hat by K and ring by T so far).
>>
>> I tried [fallbacks=] for math to no avail.
>>
>> My example uses Cambria, but it’s the same with other fonts.
>>
>> (BTW, in \bar{b} with Libertinus, the bar looks too high.)
> 
> I leave the font fallbacks to Hans or somebody else, but for the \bar
> one can argue that the "305 glyph in Libertinus Math sits too high.
> This is adjusted for in the goodie file in the next upload.

I could fix a few math accents (e.g. widebar) by limiting my 
replacements to necessary glyphs, but many other problems remain (e.g. 
breve, check, dot, widehat). It also affects the sizing of limiters and 
e.g. underbraces.

Why do font fallbacks for non-math fonts affect math at all?

Hraban
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : https://contextgarden.net
___________________________________________________________________________________

Re: [NTG-context] SOLVED: Fallbacks in text font interfere with math accents

[Henning Hraban Ramm via ntg-context]

Hans sent me a fix (font-mat.mklx), I guess it’ll be in the next upload.

Hraban
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : https://contextgarden.net
___________________________________________________________________________________