From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=33594 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OE1ww-0000y8-V4 for qemu-devel@nongnu.org; Mon, 17 May 2010 11:09:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OE1wu-0000VZ-2K for qemu-devel@nongnu.org; Mon, 17 May 2010 11:09:46 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:36083) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OE1wt-0000V9-Tv for qemu-devel@nongnu.org; Mon, 17 May 2010 11:09:44 -0400 Message-ID: <4BF15C46.1070605@citrix.com> Date: Mon, 17 May 2010 16:09:58 +0100 From: Julian Pidancet MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH] Add QEMU DirectFB display driver References: <1273766038-16808-1-git-send-email-julian.pidancet@citrix.com> <201005160210.25323.paul@codesourcery.com> <4BF144E2.1050609@codemonkey.ws> In-Reply-To: <4BF144E2.1050609@codemonkey.ws> Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Paul Brook , "qemu-devel@nongnu.org" On 05/17/2010 02:30 PM, Anthony Liguori wrote: > On 05/15/2010 08:10 PM, Paul Brook wrote: >>> The other solution would be to use the DirectFB driver for SDL which >>> would allow to do slightly the same as this patch. But that would mean >>> having to deal with an additional layer in the graphical stack, which is >>> not exactly what one wants from a performance or a complexity point of >>> view. >>> >> I don't buy your complexity argument. Doesn't DirectFB-via-SDL already work? >> If not why not? I'm pretty sure fixing that would be way simpler than adding a >> whole new output backend. >> > > Yeah, I don't buy it either. I think performance data is probably the > only way to justify this and I'm sceptical that if there is a > performance advantage that it wouldn't be possible to just fix SDL's > DirectFB support. > I don't think wether fixing or not SDL is the debate here, the question would be more wether or not we want to add a lightweight display driver to qemu. Also, I think a DirectFB driver is fairly easy to maintain. I will get some performance data as soon as I have some time. By the way, sorry for the patch reposts, it seems that my smtp server had quite some trouble to relay messages last week. -- Julian