https://bugs.kde.org/show_bug.cgi?id=390049

            Bug ID: 390049
           Summary: All XWayland applications are forcibly scaled
           Product: kwin
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: wayland-generic
          Assignee: kwin-bugs-n...@kde.org
          Reporter: kiv.ap...@gmail.com
  Target Milestone: ---

KWin can scale raster windows of old applications that do not support Wayland.
This allows you to comfortably use them on monitors with high DPI. However, the
problem is that scaling is applied to absolutely any applications that use X11
instead of Wayland. At the same time, there are applications that do not
support Wayland (and most likely will not support it very much soon), but in
fact they perfectly support High DPI.

A good example is the Google Chrome browser. It can only work through XWayland,
but it correctly handles High DPI configurations. It is even able to
dynamically change the zoom ratio when dragging its window onto a display with
another DPI under Wayland (at least it works under Gnome)! However, the current
version of KWin forcibly scales the Google Chrome window, as a result, the
fonts become ugly. And there are a lot of such applications (first of all it is
almost all proprietary applications).

In my opinion, the user should be able to include raster scaling only for the
selected applications (or vice versa, disable it for the selected
applications). Forcing windows to scale only because they work through Xwayland
is too crude a choice, because X11 also supports High DPI, although worse than
Wayland.

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