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blender-archive/intern/ghost/intern
Campbell Barton 648417bfff GHOST/Wayland: improve internal fractional scaling behavior
Logic for the recently included fractional scaling support [0] was
difficult to reason about as it depended on two different callbacks
one that listened to a preferred scale, another that tracked which
physical displays the window overlapped.
Checking if fractional scaling was in used depended on the order
the callbacks ran - which is undefined.

In practice - mixing non-fractional and fractional displays would
flicker when the window was moved between monitors.

Resolve this problem with the following changes:

- When the fractional-scale manager is supported,
  only respond to the scale from it's preferred_scale callback.
- When no fractional-scale manager is available,
  set the scale based on the scale of overlapping outputs.
- Add support for postponing the buffers commit call to prevent
  flickering when changing the windows scale.

Other changes:

- Use a lock before setting the pending frame state from
  wp_fractional_scale_handle_preferred_scale.
- Ensure pending actions that themselves trigger pending actions
  run in the time gwl_window_pending_actions_handle is called.
- Rename GWL_Window::scale -> GWL_WindowFrame::buffer_scale.

[0]: cde99075e8
2023-04-04 17:35:42 +10:00
..
2023-03-14 12:51:37 +11:00
2022-11-02 10:18:19 +11:00
2022-09-19 14:52:27 +10:00
2023-02-26 11:55:22 +13:00