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Date: Sun, 7 Sep 2008 16:42:21 +0200
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Subject: Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window
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To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org

Paul Brook, le Sun 07 Sep 2008 15:36:51 +0100, a =E9crit :
> > Ideally, once switched to fullscreen you could just let the guest
> > directly write to the actual video memory (particularly interesting f=
or
> > Xen and KVM).
>=20
> You really don't want to have the guest writing directly to host video =
ram.=20
> Video ram tends to be high-latency, so you want to write to regular mem=
ory,=20
> then use a wide block transfer or DMA to copy to video ram.

How often?  Which part(s) of the framebuffer?

> If you really need zero-copy then you should have the renderer read the=
 data=20
> directly out of the guest framebuffer.

Same questions.

Samuel