[Differential] [Request, 46 lines] D3306: Convert virtual backend to per screen rendering

[davidedmundson (David Edmundson)]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
Restricted Application added a project: KWin.
Restricted Application added subscribers: kwin, plasma-devel.

REVISION SUMMARY
  Output scaling can't ever work on a single buffer; especially if they're
  different scales and overlapping.
  
  This ports the virtual backend to perScreenRendering so that I can use it for
  tests.
  
  ctest fails here, but it fails on the tests that it failed on before..

REPOSITORY
  rKWIN KWin

BRANCH
  scaling

REVISION DETAIL
  https://phabricator.kde.org/D3306

AFFECTED FILES
  plugins/platforms/virtual/scene_qpainter_virtual_backend.cpp
  plugins/platforms/virtual/scene_qpainter_virtual_backend.h
  plugins/platforms/virtual/screens_virtual.h
  plugins/platforms/virtual/virtual_backend.h

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: davidedmundson, #plasma
Cc: plasma-devel, kwin, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas
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