Re: problem with Segoe Ui Symbol as fallback font

Re: problem with Segoe Ui Symbol as fallback font

[Jacob Kauffmann via ntg-context]

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Hi Hraban,

I had a similar problem with math fallbacks (no errors, fallbacks not used) and just found a solution.
Please find a small example below.

I don't understand why we need the line \definefontfamily, but it's necessary for the fallbacks to work.
Also, it stops working when I do \setupbodyfont[mainface,rm].

Cheers,
Jacob

\definefontfallback[cal-fallback][name:modern][uppercasescript,lowercasescript]

\starttypescript[mainface]
  \definetypeface[mainface][rm][serif][palatino][default]
  \definetypeface[mainface][ss][sans] [modern]  [default][rscale=1.075]
  \definetypeface[mainface][tt][mono] [modern]  [default][rscale=1.075]
  \definetypeface[mainface][mm][math] [palatino][default][fallbacks=cal-fallback]
\stoptypescript

\definefontfamily[mainface][math][]
\usetypescript[mainface]
\setupbodyfont[mainface]

\starttext
{\rm \input ward }

{\ss \input ward }

{\tt \input ward }

Should be Palatino: $x + y$

Should be Latin Modern: ${\cal I}$ $\mathcal{I}$ $\mathscr{I}$
\stoptext

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Re: problem with Segoe Ui Symbol as fallback font

[Jacob Kauffmann via ntg-context]

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The problem is that now that \bf, \it and so on stopped working outside math mode.
A workaround is to add \rm after \starttext.

Maybe the developers can shed some light :)
Please find MWE below.

Cheers,
Jacob

\definefontfallback[cal-fallback][name:modern][uppercasescript,lowercasescript]

\starttypescript[mainface]
  \definetypeface[mainface][rm][serif][pagella][default]
  \definetypeface[mainface][ss][sans] [modern]  [default][rscale=1.075]
  \definetypeface[mainface][tt][mono] [modern]  [default][rscale=1.075]
  \definetypeface[mainface][mm][math] [pagella][default][fallbacks=cal-fallback]
\stoptypescript

\definefontfamily[mainface][mm][mainface]
\definefontfamily[mainface][rm][pagella][bf=style:bold]
\usetypescript[mainface]
\setupbodyfont[mainface]

\startbuffer
The quick brown fox jumps over the lazy dog
\stopbuffer

\starttext
% \rm % works
{\rm \getbuffer}\par
{\ss \getbuffer}\par
{\tt \getbuffer}\par
{\bf \getbuffer}\par
{\it \getbuffer}\par
{\sl \getbuffer}\par
{\bi \getbuffer}\par
{\bs \getbuffer}\par
{\sc \getbuffer}

Should be Palatino: $x + y$ $f({\bi x})$

Should be Latin Modern: ${\cal I}$ $\mathcal{I}$ $\mathscr{I}$
\stoptext

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Re: problem with Segoe Ui Symbol as fallback font

[Henning Hraban Ramm via ntg-context]

Am 04.01.23 um 14:29 schrieb Jacob Kauffmann via ntg-context:
> The problem is that now that \bf, \it and so on stopped working outside 
> math mode.
> A workaround is to add \rm after \starttext.

> \setupbodyfont[mainface]

Did you try \setupbodyfont[mainface,rm] ?

Hraban
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Re: problem with Segoe Ui Symbol as fallback font

[Hans Hagen via ntg-context]

On 1/4/2023 2:29 PM, Jacob Kauffmann via ntg-context wrote:
> The problem is that now that \bf, \it and so on stopped working outside 
> math mode.
> A workaround is to add \rm after \starttext.
> 
> Maybe the developers can shed some light :)
\definefontfeature[mathextra][moderntocalligraphic=yes]

you can peek inti pagella-math.lfg and common-math.lfg

fallbacks in math are sort of gone in lmtx as it's only asking for 
troubles but we can overlay from other fonts in lfg files

Hans


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problem with Segoe Ui Symbol as fallback font

[Henning Hraban Ramm via ntg-context]

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I’d like to set Segoe UI Symbol as fallback for all missing glyphs.
But it doesn’t work, I get an error like

registered function call [1145]: 
...-14/tex/texmf-context/tex/context/base/mkxl/math-act.lmt:2339: 
attempt to perform arithmetic on a nil value (field 'depth')
stack

... even if there’s no fallback enabled for the math font.

\definefontfallback[segoeFB]
   [name:segoeuisymbol]
   [0x00300-0x003FF,0x02100-0x02800]
   [check=yes,force=no]

That used to work, at least until version 2022-09-18.

It’s completely irregular which ranges throw an error:
0x03000-0x20000 runs
0x02000-0x03000 doesn’t
0x02200-0x027FF doesn’t

And the fallbacks also don’t work, even if there’s no error.

It seems to depend on the font – I get errors with Segoe UI Symbol, but 
not with EmojiOneColor or Symbola.

I checked with font versions 5.0 and 5.01, don’t have newer ones.

Does it work with current versions?

Also, a list of fallbacks doesn’t work (I’d like to replace single 
characters from different fonts); is it supposed to?

test file attached.

Hraban

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