Draft: cairo: implement a cache for large soft masked images
Implement a simple cache to be used in CairoOutputDev::drawSoftMaskedImage()
when drawing large images, this noticeably improves
render time for documents like the one in issue #991 (closed)
(which has an image that comprises the total 29 pages
of the document).
The following command:
pdftocairo -png CopenhagenD-Tuesday.pdf notes.png
which extracts each of the 29 pages as png files, went from 33 seconds of running time in my laptop down to 9 seconds for the cache version.
Improves #991 (closed)
I took a couple Evince screencasts: