Add JXL Support (JPEG XL)

[rschiefer]

Apple just announced (last month) they will be support JXL very soon.

https://en.wikipedia.org/wiki/JPEG_XL

Discussed briefly in this idea as well but wanted to separate it out - #1320

[brianpopow]

The chromium project on the other side has rejected support for JXL: https://bugs.chromium.org/p/chromium/issues/detail?id=1178058#c84

[IldarKhayrutdinov]

I recently read an article about this unexpected decision, really it's sad for JXL.
Already being discussed: Re-open JPEG XL issue.

[Hefaistos68]

Since other leading vendors like Adobe, Apple and Samsung are fully supporting JPGXL formats, its about time to add it to this otherwise excellent library. Who gives a damn about chromium's decision? They want to force the world to use WEBP, which isnt bad, but not the last word on image formats.

[JimBobSquarePants]

I want to do it. It's a multi-month endeavor though so cannot possibly do it alone.

[Hefaistos68]

Well, I might be able to help out. I have seen that there are some efforts on the way for .net versions or at least .net wrappers for the C++ libraries. Not sure which way you'd like to go.

[JimBobSquarePants]

That would be amazing if you could. We always go fully managed for easier deployment and deep integration with our pixel formats.

[Hefaistos68]

Well, in this case it means rewriting the whole library. Not a small task. But interesting. Lets see. I'll have a look into existing code and how it works.