Re: [NTG-context] fallbacks

[Pablo Rodriguez via ntg-context <ntg-context@ntg.nl>]

On 4/22/23 18:05, Thomas A. Schmitz via ntg-context wrote:
> Hi all,
> 
> today, I was struggling with a fallback font I had defined, and I 
> discovered that the key "check" doesn't work as I expected.
> [...] 
> If I have "check=no," the characters are taken from termes and replaced. 
> I was under the impression that "check" should, well, check if the 
> characters are not in the main font and fall back to the fallback font
> if they are not, but this doesn't appear to be the case.

Hi Thomas,

I don’t know what check does (maybe just check?), but the standard
behaviour with \definefallbackfamily is only to fall back when the
character is missing from the main font.

To force all characters from the range in the fallback font, "force=yes"
is required.

Here you have a minimal sample (which doesn‘t use "preset=range:greek"),
adding "force=yes" gets all Greek glyphs from GFS Heraklit:

  \definefallbackfamily [presentation] [serif] [GFSHeraklit]
  [range={greekandcoptic, greekextended}]
  \definefontfamily [presentation] [serif] [TeXGyrePagella]
  \setupbodyfont [presentation,12pt]

  \starttext
  Pπμᾷσδ
  \stoptext

Just in case it might help,

Pablo
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