3ds: add support for .squashfs

[aderumier]

3ds games can use a lot of space,
citra emulator don't support compression format currently.

squashfs compression ratio is around 60% of original size

-rw-rw-r-- 1 root root 4.0G Jun 22 09:04 'Pokemon Ultra Moon.3ds'
-rw-r--r-- 1 root root 2.4G Jun 22 09:12 'Pokemon Ultra Moon.3ds.squashfs'

[Tovarichtch]

Was this tested on latest butterfly?

[aderumier]

I have tested it on v39, works out of the box.

[Tovarichtch]

Please test on butterfly since we don't use the original citra anymore, which is present in v39

[aderumier]

Please test on butterfly since we don't use the original citra anymore, which is present in v39

Thanks. I'll try it today.

BTW, it's seem that It's used Citra again (another fork), after used lemonade for some weeks ?

https://github.com/batocera-linux/batocera.linux/commit/50b014840e38820409e1d248d8b7b79c33ffbc36

[aderumier]

I confirm, this is working fine out of the box with butterfly

[udance4ever]

this works great. tested on latest 6/28 butterfly compressing w default mksquashfs and it shaved a cool 11GB (34%) off a 32GB romset - love how easy it was to implement 😎