D22150: [plugins/qpa] Implement native offscreen surface

zzag added a comment.


  > I would put the code split up into the egl_helpers file into a separate commit.
  
  I didn't go this road because the proposed change is relatively small, but if it were bigger I would definitely split this commit into several smaller.
  
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  I hope that I responded to all questions and comments.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D22150

To: zzag, #kwin
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