D7607: ARGB buffers are premultipliedD7460 in kwayland assumes all WL_SHM_FORMAT_ARGB8888 buffers arepremultipied RGB values.Kwin tests need updating to do the same.Rendering code did not need changing.

[Martin Flöser]

graesslin accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D7607

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Cc: plasma-devel, kwin, #kwin, bwowk, ZrenBot, progwolff, lesliezhai, 
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