Enable screencast utilities

[Gerry Boland]

Peek is a utility to grab screencast to animated GIFs.

They have an open bug to add Mir support:
https://github.com/phw/peek/issues/39

Current mirscreencast util only works as root, due to Unity8 replacing the renderer with its own custom one (which does not support screenshotting yet). We need to get screencasting working for third party applications running as the user.

Mediation of screencasting application is also needed - so user is aware screencast in progress.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Philipp Wolfer (phw)]

One thing that has come up on the related Wayland discussion is the fact, that Peek uses the window positioning to obtain the recording coordinates. This is very different from e.g. the more traditional approach of

Now on Wayland there is no such thing as global window coordinates, and I have read somewhere this is also the case on Mir. Is that correct?

If so one way to solve this would be to allow the API to define the screenshot / screencast area relative to the window position.

[Daniel van Vugt (vanvugt)]

See also:
https://bugs.launchpad.net/mir/+bugs?field.tag=screencast