D16358: [effects/invert] Don't block blur and background contrast effect

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

REVISION SUMMARY
  Background behind some windows is not blurred because the invert effect
  sets PAINT_WINDOW_TRANSFORMED. This essentially "turns off" the blur and
  the background contrast effect unless we set the force roles.
  
  Because the invert effect is a "post-processing"(not really) effect we
  don't have to set that flag.
  
  BUG: 279076
  BUG: 359583
  FIXED-IN: 5.14.2

TEST PLAN
  F6341916: Screenshot_20181021_212743.png <https://phabricator.kde.org/F6341916>

REPOSITORY
  R108 KWin

BRANCH
  effects-invert-blur-contrast

REVISION DETAIL
  https://phabricator.kde.org/D16358

AFFECTED FILES
  effects/invert/invert.cpp
  effects/invert/invert.h

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