Some people are asking to get Lanczos interpolation available for scaling.
This is a good idea as it seems to be a good one for this task.
Reproducible: Didn't try
Well, actually we have a lanczos filter already, but it's disabled. I'm not totally sure why we disabled it though. Try to enable it in KisFilterStrategyRegistry* KisFilterStrategyRegistry::instance() and check whether it works?
Git commit 5be34e954863fd4b5d30246c9ee09f43b8f24e5f by Dmitry Kazakov.
Committed on 05/01/2013 at 17:08.
Pushed by dkazakov into branch 'master'.
Activate Lanczos3 filter
After fixing maths in the KisTransformWorker it works perfectly.
M +1 -1 krita/image/kis_filter_strategy.cc