[Feature Request]: jp2 (jpeg 2000) support

[Alexisback]

Preflight Checklist

• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Describe your suggested feature

I have zip files, with jp2 (jpeg 2000) inside but OpenComic does not read them even if I renamed the file to .cbz.
Another program SumatraPDF instead reads them.
Is it possible to insert the jp2 display in OpenComic?
Thank you

Additional Information

No response

Sample file

Corriere dei piccoli 1908-01 originale_jp2.zip

[ollm]

Thanks for the suggestion!

Currently OpenComic does not support jp2 images. You can see the currently supported formats here.

But I will try to see if I can add it support in the next major version.

[ollm]

I'm happy to say that I've added support for JPEG 2000 via e11046b.

If you want to try it to see if there are any bugs, I'll leave you a build of the master branch.

Buid: https://mega.nz/file/aLRBiSBC#NRUurPtVW_XLd9n_CFVOIz-xrMc6lXY_gETfdFIGwzQ

[Alexisback]

Great, I'm testing, but the file loading is a bit slow, in SumatraPDF it's almost instantaneous, maybe everything can be speeded up.

https://www.upload.ee/files/17731435/Corriere_dei_piccoli_1991-16_jp2.cbz.html

[ollm]

I've made some changes to improve performance 7a6b487, it should now load much faster, especially if the file has a lot of images, although it won't go as fast as other images (jpg, png, etc) but it should be acceptable.

I've also improved the speed at which thumbnails are generated 155f064

Build: https://mega.nz/file/fKAxHazb#wJ7iaFe40_Myes3iJlMh5ypuyh6rLHjOw8L9uvH7Z4w

[Alexisback]

Yes, it loads very fast now.
If there are other features to add I suggest it.
Thanks