[vbox-dev] (no subject)

Feng, Haitao haitao.feng at intel.com
Wed Dec 15 17:45:56 PST 2010

Hi Leonid,

Recently I am working on the Xephyr stuff and I think I could return to
VirtualBox when that work is done. I have not changed my email :)

For the OpenGL acceleration, I have discussed it with our graphic
developer at the MeeGo 2010 conference meeting. Personally I think it
might be too tricky to get the fast solution, which draws texture at
host side, work correctly. If I am back, I'd like to focus on the first
solution, which does the off-screen OpenGL rendering and read the pixels
back to guest, and eliminate the un-necessary copies mentioned in our
IRC talking.

Hi Teabag, I have implemented a patch to do the off-screen rendering and
read pixel back to guest based on VirtualBox OSE 3.2.6 source code. It
is a proof of concept and as I said in the wiki, "The performance is
acceptable for development work, while not fast enough to run OpenGL
games." In the future, I'd like to work with upstream developer Leonid
on this to let VirtualBox run MeeGo UX correctly and smoothly.


On Tue, Dec 14, 2010 at 07:32:26PM +0800, Leonid wrote:
> Teabag Meego <teabagmeego at ...> writes:
> > 
> > 
> > Hello Virtualbox developers,I came across the below in MeeGo wiki
> >  The problem of running MeeGo netbook UX inside VirtualBox with GL
> acceleration has been root caused. Please refer to
> http://vbox.innotek.de/pipermail/vbox-dev/2010-August/003198.html for detailed
> information.
> > 
> >  I have fixed the above problem by applying the same technique used for Xephyr,
> >  that is, using an off-screen to render the OpenGL and reading the 
> > window contents back when necessary. The performance is acceptable for 
> > development work, while not fast enough to run OpenGL games.
> > 
> >  I have started talking with VirtualBox 3D acceleration developer Leonid
> Lobachev on this issue.
> > 
> > 
> > I want to use MeeGo with 3D acceleration on virtualbox. When is it planned to
> support it in Virtual BoxThanks.--- On Mon, 12/13/10, Teabag Meego
> <teabagmeego at rocketmail.com> wrote:
> > From: Teabag Meego
> <teabagmeego at rocketmail.com>Subject: To:
> vbox-dev at virtualbox.orgDate: Monday, December 13, 2010,
> 9:04 AM
> > http://vbox.innotek.de/pipermail/vbox-dev/2010-August/003198.html
> > 
> Hi,
> Only person I was talking about MeeGo is Feng Haitao, so I'm not sure if you
> changed email to Teabag Meego or something.
> And as he knows, there're currently some problems which doesn't have a
> fast/clear solution.
> In particular with XComposite extension there's no way which I'm aware of to
> query from an OpenGL driver if a given window was assigned a pixmap via
> XCompositeNameWindowPixmap without calling XCompositeNameWindowPixmap itself,
> which in turn will create a new pixmap object and make previous one unusable.
> In practice that means that Mutter/MeeGo creates some Xwindow XWIN, then creates
> offscreen XPM via XCompositeNameWindowPixmap(dpy, XWIN). Both XWIN and XPM are
> passed to OpenGL driver via different calls and driver needs some way to
> understand that XPM is actually a pixmap associated with XWIN.
> Leonid.
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> vbox-dev at virtualbox.org
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