D23663: RandR: Replicate outputs with XRender extension

[Roman Gilg]

romangg created this revision.
romangg added reviewers: KWin, Plasma.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
romangg requested review of this revision.

REVISION SUMMARY
  This provides means to set replicas and queries them on X11 by transforming
  crtcs with the XRender extension.
  
  There is a heuristic at play to detect possible replications and currently
  the aspect ratio is not perserved but the image stretched. Using different
  values for the transformation matrix also the former should be possible.

TEST PLAN
  Manually together with patch to KScreen.

REPOSITORY
  R110 KScreen Library

BRANCH
  cloneX11

REVISION DETAIL
  https://phabricator.kde.org/D23663

AFFECTED FILES
  backends/xrandr/xrandrconfig.cpp
  backends/xrandr/xrandrcrtc.h
  backends/xrandr/xrandroutput.cpp
  backends/xrandr/xrandroutput.h
  src/configserializer.cpp

To: romangg, #kwin, #plasma
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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