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config: apply fontconfig rules if user didn’t set an explicit font size

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If the user didn’t explicitly set the font size (e.g. font=monospace,
instead of font=monospace:size=12), our initial attempt to read the
FC_SIZE and FC_PIXEL_SIZE attributes will fail, and we used to
fallback to setting the size to 8pt.

Change this slightly, so that when we fail to read the FC_*_SIZE
attributes, apply the fontconfig rules, but *without expanding*
them (i.e. without calling FcDefaultSubstitute()).

Then try reading FC_*_SIZE again.

If that too fails, _then_ set size to 8pt. This allows us to pick up
rules that set a default {pixel}size:

    <fontconfig>
      <match>
        <edit name="pixelsize" mode="append"><double>14</double></edit>
    </fontconfig>

Closes #1287
This commit is contained in:
Daniel Eklöf 2023-03-03 17:21:11 +01:00
parent 9da1b1cec3
commit 9f3ce9236f
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2 changed files with 38 additions and 6 deletions
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CHANGELOG.md
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@ -81,10 +81,14 @@
* DPI is now forced to 96 when found to be unreasonably high.
* Set default log level to warning ([#1215][1215]).
* Default `grapheme-width-method` from `wcswidth` to `double-width`.
* When determining initial font size, do FontConfig config
substitution if the user-provided font pattern has no {pixel}size
option ([#1287][1287]).
[1166]: https://codeberg.org/dnkl/foot/issues/1166
[1179]: https://codeberg.org/dnkl/foot/issues/1179
[1215]: https://codeberg.org/dnkl/foot/pulls/1215
[1287]: https://codeberg.org/dnkl/foot/issues/1287
### Deprecated