On 20/10/2021 17:25, Sergio Callegari via shifter-users wrote:
Hi,
I would like to know if using xpra it is possible to shadow only one
part of a display, namely the one corresponding to an external monitor.
It is my understanding that the shadow operation mode shadows a full
display. Namely if you have an external monitor attached, that is
placed, e.g. right of your standard screen via xrandr, xpra will shadow
the full display area (namely the one extending from your standard
screen to the right to include also the area corresponding to your
external monitor).
Is it possible to shadow only the area corresponding to the external
monitor?
This would be extra-useful. Specifically, it would let you attach a
"virtual display adapter" to the external (HDMI/DP) port of a computer
(see https://www.amazon.com/s?k=virtual+display+adapter) to pretend that
there is an external monitor attached and make your desktop environment
and applications use it. Then it would let you virtualize this monitor
over xpra to some other place (e.g. inside a web-browser in a tablet).
In other words it would let you do the same thing that can be done with
deskreen (https://deskreen.com/), but most likely with the better
efficiency and flexibility of xpra in terms of encodings, etc.
That's a great idea! I've got one of those dongles right here.
Any clue?
I see that you've already created a ticket for it:
https://github.com/Xpra-org/xpra/issues/3320
Let's continue there.
Cheers,
Antoine
Thanks, best regards,
Sergio
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