Re: [PATCH] Add new client_present and client capabilities fields to QXLRom

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  Hi,

> The scheme I had in mind was this:
> 
>     - When a new non-a8-capable client appears, don't send it any of the
>       a8 surfaces
> 
>     - If the client doesn't understand a8 surfaces,
> 
>         - keep all a8 surfaces rendered on the server side
> 
>         - if the guest sends a command using an a8 surface as a
>           destination, simply render the command on the server side
> 
>         - if the client sends a command using an a8 surface as a source,
>           rewrite the image object to be a real image referring to the
>           server side bits (which are also sent or possibly cached)
>           rather than a surface

Hmm, when the server is able to translate a8 ops into non-a8 ops using
server-side rendering, then there is no need to notify the guest about
the client capabilities.

> But it's much simpler to just say that the guest should stop referring
> to a8 surfaces if the client can't handle them.

Not sure about that, this move might just shift the complexity from
spice-server to the guest qxl driver.

cheers,
  Gerd

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