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Date: Fri, 13 Mar 2009 10:30:17 -0500
From: Anthony Liguori <aliguori@us.ibm.com>
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Subject: Re: [Qemu-devel] [PATCH] DisplayAllocator interface
References: <49AFF01B.8070505@eu.citrix.com>
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To: qemu-devel@nongnu.org

Stefano Stabellini wrote:
> Hi all,
> this patch adds a DisplayAllocator interface that allows display
> frontends (sdl in particular) to provide a preallocated display buffer
> for the graphical backend to use.
>
> Whenever a graphical backend cannot use
> qemu_create_displaysurface_from because its own internal pixel format
> cannot be exported directly (text mode or graphical mode with color
> depth 8 or 24), it creates another display buffer in memory using
> qemu_create_displaysurface and does the conversion.
> This new buffer needs to be blitted into the sdl surface buffer every time
> we need to update portions of the screen.
> We can avoid this using the DisplayAllocator interace: sdl provides its
> own implementation of qemu_create_displaysurface, giving back the sdl
> surface buffer directly (as we used to do before the DisplayState
> changes).
> Since the buffer returned by sdl could be in bgr format we need to put
> back in the handlers of that case.
>   

Applied.  Thanks.

Regards,

Anthony Liguori