add support for AVIF files

linkarzu commented 1 month ago

I found out .avif images are not supported by asking in discord
- https://discord.com/channels/1178095355548680222/1178098370468921465/1245884208384315455
Modified code locally and tested, and I'm able to render .avif images
Compared 2 different .avif files
Noticed that their first line was different
- 0000 001c 6674 7970 6176 6966 0000 0000
- 0000 0020 6674 7970 6176 6966 0000 0000
- The first 4 bytes (0000 001c) and (0000 0020) represent the box size
- The next 4 bytes (6674 7970) represent the box type
- 6674 7970 in ASCII is "ftyp"
- The next 4 bytes (6176 6966) represent the brand
- 6176 6966 in ASCII is "avif"
So I'm skipping the first 4 characters and detecting ftypavif
If there's a better way, please feel free to apply the necessary changes

3rd commented 1 month ago

Looks good, thank you!

linkarzu commented 1 month ago

Thanks to you for the great plugin!

3rd / image.nvim