Re: Qemu vnc color depth

[Anthony Liguori <anthony@codemonkey.ws>]

Stefano Stabellini wrote:
> 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. 0x574D5669

The encoding number they use is 0x574D5669 and it is registered in the 
latest RFB spec.

Regards,

Anthony Liguori