[Feature Request] Enable support for avif

[SagsMug]

Is your feature request related to a problem? Please describe.
As more browsers are getting native support for avif, it would be nice to also have mango support this format.
It's supported by Firefox, Chrome, and Opera.
It's not supported by Safari and Edge.

Describe the solution you'd like
Add image/avif to the list of supported image formats

Describe a small use-case for this feature request
If you are working with higher quality images, the size reduction from jpeg can be dramatic, so it would be beneficial for bandwidth and disk space savings.

Additional context
I also don't see why image/gif isn't supported, this is an ancient format supported by practically all browsers.
https://caniuse.com/avif

[Nerothos]

Can't avif be stored in a cbz?

[SagsMug]

Anything can be stored in a cbz format since its a zip file, but Mango has a hardcoded SUPPORTED_IMG_TYPES which specifies image formats Mango will recognize, and avif isn't in there.
So if you have a cbz file with avif images it won't show up in Mango because it's seen as empty.

[hkalexling]

Yes you are right. I guess there's no harm in supporting more image formats 👍

[Leeingnyo]

So, do we allow files whose mime type is image/*?

[hkalexling]

@Leeingnyo Yes I think we can do that. One potential issue is that, if the first page of an entry has a type not supported by image_size.cr, Mango would fail to generate the thumbnail. But this won't break anything and Mango would just serve the original file instead.

[mango-assistant]

Hi there! The feature has been added in v0.24.0. Thanks for the feature request!