D8379: PDF: Support the new poppler renderToImage with update callback

[Albert Astals Cid]

aacid added a comment.


  @rkflx i rebased this patch on top of master that includes https://cgit.kde.org/okular.git/commit/?id=662fa69a2dcc0c1403b1773262368943d5cacd52
  
  This fixes for me the crashes on rotation jobs, the bug wasn't on this branch, it's just that now that codepath was exercised more often and thus the crash happened more often too.
  
  Could you try to see if the crashes are gone for you too?

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D8379

To: aacid, #okular, mlaurent, mwolff
Cc: mwolff, rkflx, ngraham, michaelweghorn, mlaurent, #okular, aacid
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