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Re: [Qemu-devel] Multi-head support RFC
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] Multi-head support RFC |
Date: |
Thu, 07 Nov 2013 14:46:24 +0100 |
Hi,
> As far as the EDID is concerned, there can only be one EDID for a
> display+hw pair, or the guest won't know what to do. In my use-case, I
> simply pass real EDIDs through, and create a full-screen window for each
> real monitor.
Ok, makes sense.
> If you wanted to have two UIs displaying the same
> DisplaySurface, the EDID would have to come from one of them, and the
> other would have to clip, or scale.
Yes.
> > Why not? That is exactly my plan. Just have the virtual graphic card
> > call graphic_console_init() multiple times, once for each display
> > connector it has.
> >
> > Do you see fundamental issues with that approach?
> Currently only one QemuConsole is active at a time, so that would have
> to change....
That isn't mandatory any more. It is still the default behavior of a
DisplayChangeListener to follow the active_console, for compatibility
reasons. SDL and VNC still behave that way.
You can explicitly bind a DisplayChangeListener to a QemuConsole though,
by setting DisplayChangeListener->con before calling
register_displaychangelistener().
gtk binds to QemuConsole #0.
spice creates a display channel per (graphical) console. Each display
channel has a DisplayChangeListener instance, and each
DisplayChangeListener is linked to a different QemuConsole.
For your UI you probably want follow the spice model. Have a
DisplayChangeListener for each physical monitor of the host, have a
fixed QemuConsole bound to each DisplayChangeListener.
DisplayChangeListeners can come and go at runtime just fine, so you
should be able to create/destroy them on monitor plug/unplug events on
the host.
cheers,
Gerd
- [Qemu-devel] Multi-head support RFC, John Baboval, 2013/11/05
- Re: [Qemu-devel] Multi-head support RFC, Gerd Hoffmann, 2013/11/06
- Re: [Qemu-devel] Multi-head support RFC, John Baboval, 2013/11/06
- Re: [Qemu-devel] Multi-head support RFC,
Gerd Hoffmann <=
- Re: [Qemu-devel] Multi-head support RFC, John Baboval, 2013/11/07
- Re: [Qemu-devel] Multi-head support RFC, John Baboval, 2013/11/15
- Re: [Qemu-devel] Multi-head support RFC, Gerd Hoffmann, 2013/11/19
- Re: [Qemu-devel] Multi-head support RFC, John Baboval, 2013/11/19
- Re: [Qemu-devel] Multi-head support RFC, Gerd Hoffmann, 2013/11/20