Ancestors

Written by Aras Pranckevičius on 2025-01-13 at 08:46

So here's a question: OpenEXR. There's "open" in the name! But, it contains DWAA/DWAB compression modes. Which, supposedly, are patented. OpenEXR license just says "BSD" but if you look at "PATENTS" file in the repo, it says that Dreamworks allows you to use/modify/distribution "implementation of DreamWorks Lossy Compression within the OpenEXR standard".

Now... what does that mean? Can a different EXR decoding library implement DWA decompression?

=> More informations about this toot | More toots from aras@mastodon.gamedev.place

Written by Aras Pranckevičius on 2025-01-13 at 08:48

...my interest is e.g. tinyexr -- it is another implementation of EXR decoding. But so far it has not implemented DWA out of patent bogeyman.

If, hypothetically, someone implements that, does that still fall under "within the OpenEXR standard"?

What is "open" about OpenEXR if parts of it can not be implemented by 3rd parties?

=> More informations about this toot | More toots from aras@mastodon.gamedev.place

Written by Michael B. Johnson on 2025-01-13 at 19:38

@aras I would go over to an ASWF Open EXR TSC meeting and ask:

https://www.aswf.io/meeting-calendar/

=> More informations about this toot | More toots from Drwave@mastodon.social

Written by Aras Pranckevičius on 2025-01-13 at 19:45

@Drwave I'm doing similar, but on the ASWF slack

=> More informations about this toot | More toots from aras@mastodon.gamedev.place

Toot

Written by Michael B. Johnson on 2025-01-14 at 04:15

@aras even more expedient!

=> More informations about this toot | More toots from Drwave@mastodon.social

Descendants