D9328: Add support for cancellable image rendering and text extraction

[Albert Astals Cid]

aacid added a comment.


  In https://phabricator.kde.org/D9328#195391, @aacid wrote:
  
  > In https://phabricator.kde.org/D9328#193130, @rkflx wrote:
  >
  > > 4. No text rendering in some situations (observed this multiple times when wildly zooming and jumping around via the thumbnail view, sadly don't have a concise video yet).
  >
  >
  > That's really weird since text is "just" part of the regular rendering, you should either get no rendering at all or it working, but having no text doesn't make much sense. It may be that the tile got cancelled and wasn't cleared. I'll investigate a bit more and see if i can reproduce it.
  
  
  Ok, can reproduce relatively easily now, will try to fix it up.

REPOSITORY
  R223 Okular

BRANCH
  cancellable (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D9328

To: aacid, ervin
Cc: rkflx, ervin, michaelweghorn, ngraham, #okular, aacid
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