Add thumbnailer

[hadess]

It would be great if a thumbnailer could be added. Of course, it won't work in Flatpaks as thumbnailers are (rightfully) not exported from the sandbox, but this could (eventually) be used to create a Flatpak extension to the nautilus Flatpak (or other file manager). Or it could be packaged by distributions in the meanwhile.

[Nokse22]

Yes that would be interesting. For the Nautilus extension, since it would be separate from the app, it could also make sense to just use F3D built in thumbnailer https://f3d.app/doc/user/DESKTOP_INTEGRATION.html#linux

[hadess]

Filed f3d-app/f3d#1674 as the thumbnailer there can't be used right now.

[hadess]

Maybe Exhibit's thumbnailer could use assimp directly?

I've found this example (which is certainly perfectible):
https://gitlab.com/Kazade/gnome-model-thumbnailer/

[mwestphal]

@hadess Exhibit rely on F3D for rendering, so this is not possible.

[Nokse22]

It would not be an issue to make a thumbnailer in Exhibit using F3D for rendering, but if it can't be exported with Flatpak it's better to use F3D headless version.