Implement lanczos resampler(s)
Submitted by bur..@..il.com
Link to original bug (#745614)
Description
I can not find Lancos3 interpolation method in Gimp dev 2.9 (2015-03-04) and have read, that it should be replaced by NoHalo/LoHalo. But even if they are really better in every manner than Lanczos3 (really? in every thinkable use case? By the way: both NoHalo and LoHalo worked very slow in my test), Lancos3 should not be dropped.
Because:
- It is a well known scaling method and if it's not there, a lot of users would think that an important feature is missing in Gimp, compared to competing software!
- Lanczos3 should be kept for reasons of visible comparison of scaling methods (within Gimp + between Gimp and other software)
- Lanzcos3 has a typical softening impact that could also be intended by the user/artist (like a filter).
So please don't kill it!
Version: git master