D16391: [libkwineffects] Gracefully release previous window pixmap

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
  If the cross fade animation is cancelled, we are not gracefully
  unreference the previous window pixmap.
  
  This change addresses that issue by using RAII approach to
  reference/unreference the previous window pixmap.

TEST PLAN
  Manually. The Maximize and the Morphing Popups effect still work.

REPOSITORY
  R108 KWin

BRANCH
  libkwineffects-gracefully-release-previous-window-pixmap

REVISION DETAIL
  https://phabricator.kde.org/D16391

AFFECTED FILES
  libkwineffects/anidata.cpp
  libkwineffects/anidata_p.h
  libkwineffects/kwinanimationeffect.cpp

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