Producing thumbnails for unsupported file types

[alphastrata]

As the title suggests, assuming I already have a cli app that can generate thumbnails as .png(s) for my .gltf and .obj files, can I (presumably md5 hash?) rename them and slap them in the ~/.cache/thumbnails/small|normal|large and expect cosmic-files to pick them up?

I had a quick go at doing some manually, to no avail.

This would likely be too large a PR to add the functionality to generate thumbnails for obscure file formats (obscure to most).

Can any of the devs shed some light on this?

[jackpot51]

cosmic-files supports external thumbnailers, see this for details:

https://askubuntu.com/questions/1368910/how-to-create-custom-thumbnailers-for-nautilus-nemo-and-caja

[Hyperchaotic]

Thank you @jackpot51, I had just been wondering about GIMP XCF files. I installed imagemagik and created .local/share/thumbnailers/xcf.thumbnailer:

[Thumbnailer Entry]
TryExec=convert
MimeType=image/x-xcf;image/x-compressed-xcf;
Exec=convert %i -alpha on -background none -flatten -resize x%s %o

I get thumbnails in Nautilus, though not in cosmic-files. The thumbnails are located in ~/.cache/thumbnails/large