[osg-users] TextureRectangle PBO behavior

Robert Osfield robert.osfield at gmail.com
Wed Sep 19 10:15:50 PDT 2007


It should have no effect on performance.

On 9/19/07, Andy Somerville <andy.somerville at appliedperception.com> wrote:
>
> Robert,
>
>     I've implemented the image->dirty() work-around for the update
> issue for the time being (I'd have to upgrade everyone in the office
> otherwise), but try and test 2.1.11 today to prove that it fixes the
> problem without the work-around. Any idea if it might affect the (PBO
> related?) performance as well?
>
>     Andy
>
>
> On Wed, 2007-09-19 at 09:28 +0100, Robert Osfield wrote:
> > Hi Andy,
> >
> > Could you try out the SVN or 2.1.11 version of the OSG as this
> > contains a bug fix to Image that affect video updating.
> >
> > Robert.
> >
> > On 9/18/07, Andy Somerville <andy.somerville at appliedperception.com> wrote:
> > > Hey,
> > >
> > >       I just recently retested part of my application, which uses
> > > osg::TextureRectangle and osg::ImageStream to display video, after
> > > having upgraded to 2.0, and Ive run into issues. I got past the update
> > > failure bug after seeing this post:
> > >
> > > http://groups.google.com/group/osg-users/browse_thread/thread/edd6d30fa1ef13f/bce9f6b9365d3407?lnk=gst&q=pbo&rnum=1#bce9f6b9365d3407
> > >
> > > but I have also noticed really slow framerates/high cpu usage where I
> > > didnt before. It is behaving the way it did before I switched to to
> > > TextureRectangle (and thus PBOs), so Im thinking that perhaps it is not
> > > using PBOs after the upgrade.
> > >
> > > When I turn up the notify level to INFO I see a report which indicates
> > > (as glxinfo does) that TextureRectangles and PBOs are supported, so I
> > > cant figure out why it is so slow.
> > >
> > > Is there any other way to confirm that TextureRectangle is using PBOs,
> > > or is this perhaps a known issue? Any Ideas ?
> > >
> > > OpenGL renderer string: GeForce FX 5500/AGP/SSE2
> > > OpenGL version string:   2.1.0 NVIDIA 96.31
> > >
> > >
> > >        Thanks,
> > >        Andy
>
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