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On X11, make WINIT_HIDPI_FACTOR dominate Xft.dpi in some cases (#1354)

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* On X11, make `WINIT_HIDPI_FACTOR` dominate `Xft.dpi` in some cases

This commit makes `WINIT_HIDPI_FACTOR` dominate `Xft.dpi` in general and
adds a special value `0` for `WINIT_HIDPI_FACTOR` to use winit computed
DPI factor with randr over Xft.dpi.

* Use `randr` instead of `0` for auto dpi scaling

* Update CHANGELOG

* blow up on wrong env var

* Allow empty string for env var
This commit is contained in:
Kirill Chibisov 2020-01-04 02:15:47 +03:00 • committed by Osspial
parent 7367b8be6c
commit 114c18e70d
2 changed files with 53 additions and 19 deletions
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CHANGELOG.md
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@ -23,6 +23,8 @@
- On Windows, fix `Window::set_visible` not setting internal flags correctly. This resulted in some weird behavior.
- Add `DeviceEvent::ModifiersChanged`.
- Deprecate `modifiers` fields in other events in favor of `ModifiersChanged`.
- On X11, `WINIT_HIDPI_FACTOR` now dominates `Xft.dpi` when picking DPI factor for output.
- On X11, add special value `randr` for `WINIT_HIDPI_FACTOR` to make winit use self computed DPI factor instead of the one from `Xft.dpi`.
# 0.20.0 Alpha 5 (2019-12-09)