Mipmap support for Kaiser / Lanczos filtering

[walbourn]

The current filtering modes are only those supported by WIC. Some texture pipelines have implemented more advanced filtering, such as Kaiser or Lanczos filtering, which can produce higher-quality mipmaps.

Advanced filters like Kaiser are covered in this GD Mag article: part 1, part 2

[SkyLoaderr]

Any progress on advanced mipmap support?

[walbourn]

It hasn't come up in the priority list. The GD Mag filters are also quite slow to execute on the CPU...

[Bxaa]

@walbourn
Kaiser / Lanczos filtering (fast implementation)
https://github.com/ImageMagick/ImageMagick

~70k 4k textures textures resize with Lanczos per hour
Good performance