After a while with GrapheneOS, I have grown tired of the sample gallery app and it's lack of features and decided to move to something else. Currently I am using Aves Gallery from Accrescent and find it to be filling all my needs, except providing a photo editor.
I know I could use the photo editor provided by the gallery app, but I feel it is a bit lackluster in terms of editing. What I currently have going is using Snapseed from Google Play (play services insalled with network access), with revoked network and storage permissions. When I open a photo in Aves and then hit edit, it opens up in Snapseed even though it doesn't have storage access, and is able to edit and save the image into DCIM/Snapseed.
I am now wondering what sorts of access Snapseed has to these photos? Can it read them after having edited them or is it only able to view them when I am editing a photo? Also, while I assume it won't, could Snapseed possible use Google Play Services, which has network permissions, to upload these phoros through IPC and mutual consent between the apps?
Also are there any good open source photo editors, or just editors not backed by large corporations that I perhaps could use instead of Snapseed? I couldn't find any.