D18810: [platforms/hwcomposer] Add scaling support

davidedmundson added a comment.


  I can do, but I'll explain my rationale for this first.
  
  When running nested it tends to be the user typing "kwin_wayland --scale" directly into a terminal.
  On deployment it's hidden behind the startplasmamobile script.
  
  I don't want that script to end up forked across devices.
  
  With this they can just dump a value in /etc/profile.d
  I guess I could still use --scale here and then make startplasmamobile use an env
  Or there's the option of using a config like DRM does.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D18810

To: davidedmundson, #kwin, romangg
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