[Spice-devel] How to send a custom resolution message to windows/linux guest vdagent

[Pavel Grunt]

On Thu, 2017-03-02 at 10:18 +0100, Victor Toso wrote:
> Oi Thiago,
> 
> On Thu, Mar 02, 2017 at 03:58:34AM -0300, Thiago Nascimento Araujo
> wrote:
> > Hello,
> > 
> > Is there a way to send a spice message, connect to pipe, or any
> > other
> > method to contact vdservice/vdagent to create/simulate a resize to
> > an
> > arbitrary resolution or full screen effect caused by remote-
> > viewer?
> 
> I would start enabling the debug messages, it should give you good
> hints
> on how things work. For instance, with spicy --spice-debug:
> 
> /* Resizing the widget */
> GSpice-DEBUG: spice-widget.c:1228 recalc geom monitor: 0:0, guest
> +0+0:640x480, window 714x522, zoom 1
> GSpice-DEBUG: spice-widget.c:1228 recalc geom monitor: 0:0, guest
> +0+0:640x480, window 715x524, zoom 1
> GSpice-DEBUG: spice-widget.c:1228 recalc geom monitor: 0:0, guest
> +0+0:640x480, window 716x525, zoom 1
> (...)
> GSpice-DEBUG: spice-widget.c:1810 focus_in_event
> GSpice-DEBUG: spice-widget.c:1462 release_keys
> GSpice-DEBUG: spice-gtk-session.c:203 inputs-3:0:
> client_modifiers:0x2, guest_modifiers:0x2
> /* Sending new monitors config! */
> GSpice-DEBUG: channel-main.c:1118 main-1:0: sending new monitors
> config to guest
> GSpice-DEBUG: channel-main.c:1135 main-1:0: monitor #0: 716x525+0+0
> @ 32 bpp
> GSpice-DEBUG: channel-main.c:1070 #0 +0+0-716x525
> GSpice-DEBUG: channel-display.c:1820 display-2:0: received empty
> monitor config
> GSpice-DEBUG: channel-display.c:1820 display-2:0: received empty
> monitor config
> GSpice-DEBUG: channel-display.c:1820 display-2:0: received empty
> monitor config
> GSpice-DEBUG: channel-display.c:1820 display-2:0: received empty
> monitor config
> /* Done with the interesting part */
> 
> Very likely it should be possible to improve the spicy testing tool
> to
> have something that could you help you test it, like some text
> fields to
> set display X width X height values.

Actually I sent a patch for it few months ago ;)
https://github.com/xerus/spice-gtk/commit/2fbf5aaed4adec593a5e89e93d3b
286b98816419


> 
> > Any other ways I can connect to the named pipes (windows guests or
> > linux guests) and watch/debug/learn. I cant find or connect to the
> > windows guest named pipe and I got connection refused trying to
> > socat
> > to a port in linux guest.
> 
> You will then need to hexdump the data and start trying to get the
> meaning out of it. I think it is more interesting to include more
> debug
> in the agents if you want to know more specific details about
> something
> that is going on. Or even gdb -p $PID.
> 
> > I really need some guidance to fully understand how arbitrary
> > resolutions are created using win/lnx/spice api.
> > 
> > Thanks in advance.
> 
> Feel free to ask your doubts here as well. We would gladly take any
> patches that improve the documentation/testing tools too :)
> 
>         toso
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