[winswitch] games rely on precise mouse movements

Antoine Martin antoine at nagafix.co.uk
Fri Dec 13 05:25:46 GMT 2013

On 13/12/13 11:59, ... wrote:
> https://www.xpra.org/trac/ticket/137
> I was just looking through this.  I like the tablet idea, well for tablets.
>  I'd love to see games through xpra on a linux tablet, if not android.
The android client needs work and doesn't even handle keyboard input at
all, and mouse only just.
> As for actual mouse movements, I don't know squat about how things are
> working, but the thought I had on seeing this is having python or cython
The choice of language wouldn't really matter.
> doing interpolation between mouse positions on the server (client?) side,
> simulating the acceleration that the game is going to try and do anyway.
> Has that been considered / is it workable?
I don't think that this would improve things, only make things more
We already have the mouse events that the application should be
receiving, those are the events we receive client side. No need to
interpolate anything.
Adding the option to send all mouse events (and not just the last one we
find time to send as we do at present) would be trivial to implement,
the extra bandwidth costs should be immaterial if you are targeting gaming.
The difficulty is in delivering the events to the remote application
with the same exact gap between them as they had when we received them.
This could probably be solved by artificially delaying *all* mouse
events by a delay (based on the network jitter) that restores the
original gap.


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