D9848: Updated the blur method to use the more efficient dual kawase blur algorithm.

[Alex Nemeth]

anemeth marked 6 inline comments as done.
Restricted Application edited projects, added Plasma; removed KWin.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D9848

To: anemeth, #plasma, #kwin
Cc: broulik, romangg, zzag, anthonyfieroni, mart, davidedmundson, fredrik, 
ngraham, plasma-devel, kwin, #kwin, ZrenBot, progwolff, lesliezhai, 
ali-mohamed, jensreuterberg, abetts, sebas, apol