ext-image-source and ext-screencopy

[Drakulix]

Implementation of unmerged upstream protocol ext-image-source and ext-screencopy (https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/124) based on #358.

[russelltg]

It's merged now! 🎉

[Drakulix]

It's merged now! 🎉

We know. Waiting for a new wayland-protocols release before we can update wayland-rs.

[AlexProgrammerDE]

wayland-protocols 1.37 was released. Seems like wayland-rs can be updated after this PR is merged: Smithay/wayland-rs#754

[AlexProgrammerDE]

wayland-rs now merged the PR and the crate wayland-protocols from the project has these two protocols now in version 0.32.4. I guess this PR can be updated now to use this new version that contains ext-image-capture-source-v1 and ext-image-copy-capture-v1.

[Quackdoc]

It would be nice if this could be supported as we are now seeing applications that can utilize this

[Quackdoc]

It might be worth noting that sway has merged support for these protocols, so we may start to see more applications use them.

[ids1024]

It may be easiest to support first on the client side. I've started working on client code to abstract over the cosmic-screencopy-v2 protocol and the final version of the ext protocol (which is only slightly different). If we merge support in clients first, we could just drop support for cosmic-screencopy-v2 in the compositor and replace it with ext-image-copy-capture.

[ids1024]

Client-side, I was prototyping a potentially better and higher-level API for screen capture to share between the cosmic components that use screencopy, but for now in pop-os/cosmic-protocols#46 I'm incrementally improving the API we have now, and making it work with ext-image-copy-capture (with a few more changes I still need to make, that branch should work for output/toplevel capture with ext-image-copy-capture).

So we need to decide about workspace capture (pop-os/cosmic-protocols#47), potentially using ext-workspace-v1 (which we don't currently implement), but other than that we should be able to have our clients updated to support ext-image-copy-capture quite soon.

I'll be happy to be able to test against Sway to see if there are differences in the implementations, help identify which issues are compositor bugs, etc.