Ubuntu moving towards Wayland

Adam Jackson ajax at redhat.com
Tue Nov 9 19:19:00 UTC 2010

On Tue, 2010-11-09 at 14:01 -0500, Brian Wheeler wrote:
> On Tue, 2010-11-09 at 13:47 -0500, Adam Jackson wrote:
> > And I'm saying you can get the network remoting effect you like in X, in
> > Wayland.  It's not built into the local Wayland rendering system, but
> > there are both trivial ways to add it (vnc-like) and complicated ways to
> > add it (rdp-like) and both will work.
> So would it be a rooted VNC?  If so, that simply sucks.  The rdp style
> is better, but I have a sneaking suspicion that it is going to be hit or
> miss in different toolkits the same way that GUI/TUI admin tools are
> always "kept in sync".

Sorry, I assumed a bit much domain knowledge here.

When I say "vnc-like" I mean "let's scrape the pixels out of the
rendering buffer and shove them over the wire".  VNC itself is rooted,
but vnc-like remoting can be rooted or rootless.  In wayland the
fundamental object of composition is a whole window, so you have
scrapeable surfaces both at the window level and at the top level.  Take
your pick.

When I say "rdp-like" I mean "instill enough awareness of the
possibility of remoting in the rendering system that remoting can send a
rendering command stream instead of raw pixels if that seems to be a
win".  Wordy, I admit.  And, obviously, much more work than just
vnc-like scraping.  But it's a serious win for WAN links, and is the
only viable way to remote 3D, etc.

And, of course, you can have both at once.  rdp-like remoting probably
requires toolkit awareness (in this bizarro world, the nested X server
counts as a toolkit!), so if you end up remoting an app that lacks that
level of toolkit support, you can fall back to vnc-like.

- ajax
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