From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KcItg-0005MZ-Ta for qemu-devel@nongnu.org; Sun, 07 Sep 2008 07:57:40 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KcIte-0005Hu-Vu for qemu-devel@nongnu.org; Sun, 07 Sep 2008 07:57:40 -0400 Received: from [199.232.76.173] (port=48296 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KcIte-0005HW-K3 for qemu-devel@nongnu.org; Sun, 07 Sep 2008 07:57:38 -0400 Received: from mx1.redhat.com ([66.187.233.31]:48752) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KcIte-00088T-7i for qemu-devel@nongnu.org; Sun, 07 Sep 2008 07:57:38 -0400 Date: Sun, 7 Sep 2008 12:57:36 +0100 From: "Daniel P. Berrange" Subject: Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window Message-ID: <20080907115735.GA12055@redhat.com> References: <48B81423.9050502@eu.citrix.com> <48BF4F4F.40208@codemonkey.ws> <48BFB318.206@eu.citrix.com> <20080905120214.GD1373@shareable.org> <48C16207.5090808@eu.citrix.com> <20080905165536.GA12606@redhat.com> <48C38757.5030507@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48C38757.5030507@qumranet.com> Reply-To: "Daniel P. Berrange" , qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: qemu-devel@nongnu.org On Sun, Sep 07, 2008 at 10:48:39AM +0300, Avi Kivity wrote: > Daniel P. Berrange wrote: > >On Fri, Sep 05, 2008 at 05:44:55PM +0100, Stefano Stabellini wrote: > > > >>Jamie Lokier wrote: > >> > >>>Another way to map guest framebuffer to video memory is the XF86DGA > >>>extension, which is great when you can use it. I think VMware uses it > >>>in full-screen mode. > >>> > >>I went with OpenGL because I wanted the accelerated window resize > >>feature, and because I think it will give us more opportunities for > >>further improvements (for example using PBOs as soon as they are > >>supported by at least one open source graphic card driver). > >> > > > >The problem with OpenGL is that it has horrible rendering issues if you > >are also using a compositing window manager like Compiz. > > I would say that this is a compiz problem. Not really. Its a limitation of current X server driver architecture which is being addressed by DRI2 / Redirected direct rendering work > >You need an X > >server & driver which supports Redirected Direct Rendering [1]. No distro > >currently has any official support for this yet. > > Or a distro problem. The distros can't do anything about it, until X driver architecture work is done. > >AFAIK, the next Fedora 10 > >will be the first to support it, and even then only on Intel hardware[2]. > >ATI is still a fair way off, and NVidia support is nowhere to be seen. For > >accelerated resize of windows though you shouldn't need 3d - the graphics > >driver 2-d hardware acceleration support ought to be sufficient I'd > >imagine > > I don't see how distros can enable compiz if it breaks opengl > applications like this. This is exactly why Fedora does not yet enable compiz by default. Many users still enable it though. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|