Re: Qemu vnc color depth

[Stefano Stabellini <stefano.stabellini@eu.citrix.com>]

Anthony Liguori wrote:
> We can use the existing space for gtk-vnc although VMware actually 
> already has an extension to support server initiated pixel format 
> changes.  See http://wiki.multimedia.cx/index.php?title=VMNC
> 
> The extension is VMVi (display mode change).  I would much rather just 
> implement that in QEMU and in gtk-vnc.
> 
> This would also count in my mind as finally fixing SetPixelFormat since 
> a client could rely on getting the DisplayModeChange message before the 
> server starts using the new pixel format.

I have given a look at WMVi: the message format is fine as it is 
identical to the PIXEL_FORMAT part of the ServerInit message.
However I couldn't see the pseudo encoding number or any client side 
implementation.
I think they used WMVi as part of their format to record AVI videos and 
not as a VNC protocol extension.

We can use the message format they proposed, but we need also a proper 
pseudo encoding number.
Then we'll send "DisplayModeChange" messages as 1 rectangle framebuffer 
updates.