Scaling up CBoE on HiDPI Linux systems

[Nephil Thief]

Turns out this is not as hard as I thought, it just relies on a somewhat obscure X server parameter that Xwayland also accepts.

 

The steps are

1. Set Wine to use a virtual desktop. This is important for being able to move the map window around and such.
2. Start a Weston or other minimal compositor session within your normal Wayland desktop.
3. In the embedded compositor session, start Xwayland using the -dpi option, e.g `Xwayland :5 -dpi 75`
4. Now open another terminal in the embedded session, export DISPLAY as necessary, and start BoE in it.
5. You'll wind up with something that looks like this:

 

This way you can get a legible (though slightly ugly) window on HiDPI monitors where the window would normally be tiny. Furthermore with Xwayland 23.1 the embedded Weston session becomes unnecessary, as the -geometry parameter lets you specify a smaller window instead of Xwayland taking up the whole screen.

[Nephil Thief]

An addendum: launching the game in Cage works just as well. Correct scaling is applied automatically.