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; * etc/PROBLEMS: Describe MS-Windows issues with fonts. (Bug#54685)

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Eli Zaretskii 2022-04-15 15:38:06 +03:00
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etc/PROBLEMS
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@ -1062,6 +1062,21 @@ modern fonts are used, such as Noto Emoji or Ebrima.
The solution is to switch to a configuration that uses HarfBuzz as its
shaping engine, where these problems don't exist.
** On MS-Windows, selecting some fonts as the default font doesn't work.
This can happen if you select font variants such as "Light" or "Thin"
or "Semibold" or "Heavy", and some others. The APIs used by Emacs on
Windows to enumerate fonts in a font family consider only 4 font
variants to belong to the same family: Regular, Italic, Bold, and
Bold-Italic. All the other variants aren't returned by those APIs
when we request to list all the fonts in a family, and thus aren't
considered by Emacs to belong to the family. So any font variant that
is not one of those 4 will likely not work as expected; in most cases
Emacs will select some other font instead.
The only workaround is not to choose such font variants as the default
font when running Emacs on MS-Windows.
* Internationalization problems
** M-{ does not work on a Spanish PC keyboard.