Re: [Qemu-devel] [PATCH 4 of 5] sdl shared buffer support

[Anthony Liguori]

Stefano Stabellini wrote:
> This patch implements shared buffer support in sdl.c.
> It also supports paletted 8 bit colour depths using the
> palette functions provided by the SDL library.
>   

So the theory goes that it's possible with this patch that both surfaces 
are hardware surfaces so blitting is fast?  In practice, when using X11 
both surfaces are going to be XShmImages so I don't think this is going 
to perform any better than the current code.

Do you have any sort of measurements that show an advantage with this patch?

I sort of think you want the opposite interface.  One where the VGA code 
uses ds->data directly if the guest ds->data is in a supportable format.

Regards,

Anthony Liguori