This uses the ref test infrastructure inside the cursor tests screen
cast client, and verifies the content on the screen cast matches the
content of the compositor, both when using the 'embedded' cursor mode,
and the 'metadata' cursor mode.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3859>
Only actively test MemFd, and don't ever ask for or expect MemPtr, since
we don't support those anyway. Also, for convenience, ask the buffers to
be automatically mmap:ed.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3859>
