D18486: [RFC] XWayland Multi DPI support

romangg created this revision.
romangg added a reviewer: KWin.
Herald added a project: KWin.
Herald added a subscriber: kwin.
romangg requested review of this revision.

REVISION SUMMARY
  This patch enables for all HiDPI aware X clients in our Wayland session Multi
  DPI support.
  
  The following patch to XWayland needs to be applied in order to work:
  <link to follow>
  
  More information about the internal mechanism can be found in the description
  and commit message of this merge request.
  
  Additionally for common browsers to work the workspace should set GDK_SCALE to
  the maximum scale factor of the output configuration.
  
  A next step would be to do this programmatically. For example workspace could
  listen to a DBus signal sent by KWin when the maximum scale factor changes.
  
  **Watch it in action here:** https://youtu.be/a8HPS3LbCCg
  
  BUG: 389191

TEST PLAN
  Manually

REPOSITORY
  R108 KWin

BRANCH
  xwlScaling

REVISION DETAIL
  https://phabricator.kde.org/D18486

AFFECTED FILES
  abstract_output.cpp
  client.cpp
  events.cpp
  geometry.cpp
  main.h
  main_wayland.cpp
  main_wayland.h
  netinfo.cpp
  platformsupport/scenes/opengl/abstract_egl_backend.cpp
  plugins/scenes/opengl/scene_opengl.cpp
  plugins/scenes/qpainter/scene_qpainter.cpp
  scene.cpp
  screens.cpp
  xcbutils.h

To: romangg, #kwin
Cc: kwin, jraleigh, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, ngraham, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart