PDF: Support the poppler 0.62 renderToImage with update callback
Summary:
This way pages that take more than 500ms to render get updated every so often so that the
user can see that the program didn't hang, it's just that it's taking long to render
Tags:
incremental rendering, partial updates
BUGS: 344081
Subscribers: Okular
Tags: Okular
Differential Revision: https://phabricator.kde.org/D8379