qemu-devel.nongnu.org archive mirror
 help / color / mirror / Atom feed
From: Anthony Liguori <anthony@codemonkey.ws>
To: qemu-devel@nongnu.org
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [Qemu-devel] [PATCH 4 of 5] sdl shared buffer support
Date: Sun, 07 Sep 2008 19:48:11 -0500	[thread overview]
Message-ID: <48C4764B.2060008@codemonkey.ws> (raw)
In-Reply-To: <48BFF045.2030303@eu.citrix.com>

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

  reply	other threads:[~2008-09-08  0:49 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-04 14:27 [Qemu-devel] [PATCH 4 of 5] sdl shared buffer support Stefano Stabellini
2008-09-08  0:48 ` Anthony Liguori [this message]
2008-09-08 14:20   ` Stefano Stabellini
2008-09-08 14:31     ` Anthony Liguori

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=48C4764B.2060008@codemonkey.ws \
    --to=anthony@codemonkey.ws \
    --cc=qemu-devel@nongnu.org \
    --cc=stefano.stabellini@eu.citrix.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).