[vtkusers] QVTKWidget2 memory leak?

[Jonathan Morra]

I will spend some time and try and put together a small self contained test.

On Fri, Feb 24, 2012 at 1:29 PM, Clinton Stimpson <clinton at elemtech.com>wrote:

> On Friday, February 24, 2012 02:19:59 pm Jonathan Morra wrote:
> > I have recently converted my app from using QVTKWidget to QVTKWidget2 so
> > that I could paint on the QVTKWidget2 (which I was able to successfully
> > do).  After this conversion my app started to leak memory terribly.  I
> > followed the memory leak around, and found the culprit is the following
> > line
> >
> > glTexImage2D(GL_TEXTURE_2D, 0, internalFormat,
> >
> >                    xsize, ysize, 0, format,
> >
> >                    GL_UNSIGNED_BYTE, static_cast<const GLvoid *>(data));
> >
> >
> > Which is in the following function
> >
> >
> > void vtkOpenGLImageSliceMapper::RenderTexturedPolygon(
> >
> >   vtkRenderer *ren, vtkImageProperty *property,
> >
> >   vtkImageData *input, int extent[6], bool recursive)
> >
> >
> > I am using a build that I got from git on January 10th.  I have a 64
> > bit Windows 7 machine, but have built VTK with Microsoft Visual
> > Studios 2008 32 bit.
> >
> >
> > This bug is manifested everytime I call render on a QVTKWidget2 that I
> > have placed a vtkImageViewer2 in.  This is a very critical bug for us
> > as now our program runs out of memory very quickly because there are
> > situations where render is called on every mouse move which means the
> > program will die extremely fast.  Any help would be appreciated.
> >
>
> Ok, I see the cause of the problem.
>
> QVTKWidget2::Start() calls OpenGLInit(), which resets the context creation
> time and the vtkOpenGLImageSliceMapper reloads them thinking its a new
> context.
>
> It would helpful if you can provide a minimal test case to demonstrate
> this.
>
> --
> Clinton Stimpson
> Elemental Technologies, Inc
> Computational Simulation Software, LLC
> www.csimsoft.com
>
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