Yees, that's the case.
Thank you once again for the diagnose,
Can
2008/10/27 Robert Osfield <[EMAIL PROTECTED]>
> Hi Can,
>
> The osgViewer::Viewer by default now releases the context after
> frame() even in single threaded - this is required to handle users
> calling multiple viewers from one frame loop. In
> include/osgViewer/ViewerBase you'll find the method:
>
> /** Hint to tell the renderingTraversals() method whether to
> call relaseContext() on the last
> * context that was made current by the thread calling
> renderingTraverals(). Note, when
> * running multi-threaded viewer no threads will be made
> current or release current.
> * Setting this hint to false can enable the frame loop to be
> lazy about calling makeCurrent
> * and releaseContext on each new frame, helping performance.
> However, if you frame loop
> * is managing multiple graphics context all from the main
> frame thread then this hint must
> * be left on, otherwise the wrong context could be left
> active, introducing errors in rendering.*/
> void setReleaseContextAtEndOfFrameHint(bool hint) {
> _releaseContextAtEndOfFrameHint = hint; }
>
> So you can call :
>
> viewer.setReleaseContextAtEndOfFrameHint(false);
>
> And you'll be able to call OpenGL op's after frame(), but... your code
> will be working on a wing and prayer - as later you might want to go
> multi-threaded, or use multiple graphics context in which case the
> main thread once more won't have the graphics context current.
>
> The way to fix this robustly is do add the ops via a Camera Pre or
> PostDrawCallback as no matter what the threading model it'll work.
>
> Robert.
>
> On Mon, Oct 27, 2008 at 1:29 PM, Can T. Oguz <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > I'm running OSG in single threaded mode and making the calls right after
> the
> > context setup code, but if you think that the scaling operation needs to
> be
> > done within the OSG's inner threads; then there's no chance that I could
> use
> > this function. If you suggest an alternative, I'll follow.
> >
> > Regards,
> >
> > Can
> >
> > 2008/10/27 Robert Osfield <[EMAIL PROTECTED]>
> >>
> >> Hi Can,
> >>
> >> You make no mention where about your call the scaleImage from, there
> >> is chance that you think you are calling it from a thread with the
> >> graphics context but don't. Without more info about your usage there
> >> isn't anyone else can say. Please remember the OSG is multi-threaded,
> >> and by default with put the graphics in its own thread per context so
> >> then main thread won't have the context current.
> >>
> >> Robert.
> >>
> >> On Mon, Oct 27, 2008 at 1:06 PM, Can T. Oguz <[EMAIL PROTECTED]> wrote:
> >> > Hi,
> >> >
> >> > Yes, I've read the previous posts and I have a valid context. I have
> >> > even
> >> > made the calls after the first frame() is executed (to ensure the
> >> > context)
> >> >
> >> > Source image is 512x217
> >> > Dest image is 50x20
> >> > OS : Win XP
> >> > Image iss JPG, GL_RGB
> >> > Card : NVidia 8800 GT
> >> > OSG : 2.6.1
> >> >
> >> > and the code is :
> >> >
> >> >
> >> > for (UINT i = 0; i < 3; i++)
> >> >
> >> > {
> >> >
> >> > Image
> >> >
> >> > * image = readImageFile(string(path) + textureFiles[i] + ".jpg");
> >> >
> >> > m_textures
> >> >
> >> > [i] = new Texture2D(image);
> >> >
> >> > m_thumbnails
> >> >
> >> > [i] = new Image(*image, CopyOp::DEEP_COPY_IMAGES);
> >> >
> >> > m_thumbnails
> >> >
> >> > [i]->scaleImage(50, 20, 1);
> >> >
> >> > }
> >> >
> >> > I've also tried a non-copied fresh image and I've got the same error.
> >> >
> >> > Thanks for reading,
> >> >
> >> > Can
> >> >
> >> >
> >> >
> >> > 2008/10/27 Tomlinson, Gordon <[EMAIL PROTECTED]>
> >> >>
> >> >> First guess 'Are you doing this in process with a valid graphics
> >> >> context'
> >> >>
> >> >>
> >> >> Might help if you provided some basic info such as"
> >> >>
> >> >>
> >> >> How are you scaling the image (code)
> >> >> What version of osg
> >> >> What OS
> >> >> how big is the image
> >> >> What type of image is it
> >> >> Graphics card
> >> >> etc.
> >> >>
> >> >> have you tried debug the issue? , stepped into the code etc to see
> >> >> what
> >> >> might be amiss
> >> >>
> >> >>
> >> >>
> >> >> Gordon
> >> >>
> >> >> __________________________________________________________
> >> >> Gordon Tomlinson
> >> >>
> >> >> Product Manager 3D
> >> >> Email : gtomlinson @ overwatch.textron.com
> >> >> __________________________________________________________
> >> >> (C): (+1) 571-265-2612
> >> >> (W): (+1) 703-437-7651
> >> >>
> >> >> "Self defence is not a function of learning tricks
> >> >> but is a function of how quickly and intensely one
> >> >> can arouse one's instinct for survival"
> >> >> - Master Tambo Tetsura
> >> >>
> >> >>
> >> >>
> >> >> ________________________________
> >> >> From: [EMAIL PROTECTED]
> >> >> [mailto:[EMAIL PROTECTED] On Behalf Of Can
> T.
> >> >> Oguz
> >> >> Sent: Monday, October 27, 2008 8:45 AM
> >> >> To: OpenSceneGraph Users
> >> >> Subject: [osg-users] gluScaleImage() returns "out of memory"
> >> >>
> >> >> Hi,
> >> >>
> >> >> I'm receiving an out of memory error while trying to scale an image.
> >> >>
> >> >> File : Image.cpp
> >> >> Line : 839 (2.6.1)
> >> >>
> >> >> In Image::scaleImage(), gluScaleImage() returns 1285 : out of memory.
> >> >>
> >> >> Any ideas?
> >> >>
> >> >> Can
> >> >> _______________________________________________
> >> >> osg-users mailing list
> >> >> [email protected]
> >> >>
> >> >>
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >> >>
> >> >
> >> >
> >> > _______________________________________________
> >> > osg-users mailing list
> >> > [email protected]
> >> >
> >> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >> >
> >> >
> >> _______________________________________________
> >> osg-users mailing list
> >> [email protected]
> >>
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> >
> > _______________________________________________
> > osg-users mailing list
> > [email protected]
> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> >
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