D18810: [platforms/hwcomposer] Add scaling support

romangg added a comment.


  In D18810#407892 <https://phabricator.kde.org/D18810#407892>, @davidedmundson wrote:
  
  > 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.
  
  
  That makes sense. But I would still prefer only one way to manually set scale in KWin on startup.
  In light of D18465 <https://phabricator.kde.org/D18465> at one point I also want to generalize initial output description to being setup with a list of parameters and reading in config files in json format (and falling back to KScreen config files; that way we wouldn't have ugly mode switches on startup). Because of that having it the same way over all platforms supporting initial output description is advantageous.
  
  > 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.
  
  Reading out the env variable in startplasmamobile sounds fine until we have the initial config file read.

REPOSITORY
  R108 KWin

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

To: davidedmundson, #kwin, romangg
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