[Wayland-bugs] [Bug 93315] Automatically scale windows?

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93315

--- Comment #14 from Daniel Stone <daniel at fooishbar.org> ---
(In reply to Alexander Larsson from comment #12)
> I don't think that is really a problem though. 
> 
> not dynamic: We could just always allocate a scale 2 screen.
> 
> can't blit across screens: When would you need that. Apps would generally
> just connect to either one, and ignore the other. The compositor can do
> blitting on the wayland side.
> 
> windows can't share screens or move to other screen: Well, either the app
> has no knowledge of hidpi, we then always want it to be on the screen that
> has scale=1 (i.e. is scaled up if the real output is scale=2). Apps that are
> hidpi aware are passed the unmodified screen (and some env var is set about
> the scale), and then they can render in full resolution. Then the compositor
> can scale these down to scale=1 outputs in the mixed-scale case.

Hm, right; I think that could well work, but would require a fair bit of
surgery. Especially on the XWayland side, where we have to perform the mapping
back into a fixed/linear co-ordinate space. But yeah, it could well just work
...

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