Hi Shuxing,
I'm afraid mixing PixelBuffers with GraphicsWindowEmbedded isn't going
to work, as osgViewer won't have the neccesary hooks in the graphics
context that it needs. The graphics window embedded feature is not a
fully feature implemented, rather an adapter to make it really
straight forward to glue a viewer into the window.
In 2.3.0 dev release made last night (and SVN) the osgviewerQT example
now has two implementations of integration with QT, one the
GraphicsWindowEmbedded that you are familiar, and a second that
instead of using QGLWidget uses QWiget and osgViewer itself to create
the graphics contexts using GraphicsWindowWin32/X11/Carbon. This
later technique has the advantage that osgViewer now nows much more
about the graphics contexts and can correctly share them.
Robert.
On Dec 18, 2007 3:51 AM, Shuxing Xiao <[EMAIL PROTECTED]> wrote:
>
>
>
>
> I'm using osgviewerQT as my windowing system, so the graphicswindow it uses
> is GraphicsWindowEmbedded.
>
> But when it comes to realizeImplementation() function of PixelBufferWin32
> class, I got the following runtime error:
>
>
>
> Run-Time Check Failure #3 - The variable 'hglrc' is being used without being
> defined.
>
>
>
> I traced the stack, and found in bool
> PixelBufferWin32::realizeImplementation()
>
>
>
> if (_traits->sharedContext)
>
> {
>
> HGLRC hglrc;
>
>
>
> GraphicsWindowWin32* graphicsWindowWin32 =
> dynamic_cast<GraphicsWindowWin32*>(_traits->sharedContext);
>
> if (graphicsWindowWin32)
>
> {
>
> hglrc = graphicsWindowWin32->getWGLContext();
>
> }
>
> else
>
> {
>
> PixelBufferWin32* pixelBufferWin32 =
> dynamic_cast<PixelBufferWin32*>(_traits->sharedContext);
>
> if (pixelBufferWin32)
>
> {
>
> hglrc = pixelBufferWin32->getWGLContext();
>
> }
>
> }
>
>
>
> wglShareLists(hglrc, _hglrc);
>
> }
>
>
>
> Since my graphicswindow is GraphicsWindowEmbedded, then the two dynamic_cast
> will all return NULL.
>
> And then the hglrc will be uninitialized when wglShareLists is invoked. That
> causes the error. However, I've no idea how to fix this runtime error.
>
>
>
> BTW, This error doesn't happen when I first setup my scene and view it, but
> when I modified the scene and changed one of its node.
>
>
>
> Any help will be great appreciated, thanks a lot.
>
>
>
> Sincerely yours,
>
> Shuxing Xiao
> _______________________________________________
> osg-users mailing list
> osg-users@lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
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