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term: get_font_dpi(): don't crash when there aren't any available monitors

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Seen on plasma; monitor is turned off, and then back on again. Before
the "new" output global is emitted, the compositor calls
fractional_scale::preferred_scale().

This results in a call to get_font_dpi(), where we crash, since it
assumes there is at least one monitor available.

Fix by falling back to a DPI of 96.

Hopefully closes #1498
This commit is contained in:
Daniel Eklöf 2023-10-01 09:20:13 +02:00
parent 400a3f5ad2
commit b95a7cb84f
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2 changed files with 6 additions and 2 deletions
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@ -106,11 +106,15 @@
auto-detection ([#1465][1465]).
* Crash when `XDG_ACTIVATION_TOKEN` is set, but compositor does not
support XDG activation ([#1493][1493]).
* Crash when compositor calls `fractional_scale::preferred_scale()`
when there are no monitors (for example, after a monitor has been
turned off and then back on again) ([#1498][1498]).
[1436]: https://codeberg.org/dnkl/foot/issues/1436
[1464]: https://codeberg.org/dnkl/foot/issues/1464
[1465]: https://codeberg.org/dnkl/foot/issues/1465
[1493]: https://codeberg.org/dnkl/foot/pulls/1493
[1498]: https://codeberg.org/dnkl/foot/issues/1498
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