[vtkusers] vtkWindowToImageFilter - black image

[Scott Wittenburg]

Hi Frederik,

   I believe I have encountered this before.  What solved it for me was
turning on the "ShouldRerender" flag in addition to what you have set.
Something like:

windowToImageFilter.ShouldRerenderOn();

could possibly help.

Cheers,
Scott



On Tue, Jun 9, 2015 at 9:02 AM, Fredrik <frejon at gmail.com> wrote:

> Hello. There are several threads on this topic, and the few I see, the
> proposed solutions are not enough or the thread is left unresolved. see
> this:
>
> http://public.kitware.com/pipermail/vtkusers/2014-October/085358.html
> http://public.kitware.com/pipermail/vtkusers/2014-October/085294.html
>
> I still am unable to generate anything else than a black image.
> I'm on the latest VTK, under Mac OS X 10.10.  I also tried offscreen
> rendering, but no luck.
>
> Hours of googling and testing solutions have proven unsuccessful, I'd
> really appreciate if anyone could help me.
>
> here's a snippet of my code if you think it'll help
>
>         tempFile = "xyz.bmp";
>         // write to temporary bmp file
>         vtkBMPWriter writer = new vtkBMPWriter();
>         vtkWindowToImageFilter windowToImageFilter = new
> vtkWindowToImageFilter();
>         windowToImageFilter.ReadFrontBufferOff();
>         windowToImageFilter.SetMagnification(1);
>         windowToImageFilter.SetInput(renderWindow);
>         windowToImageFilter.SetInputBufferTypeToRGBA();
>         windowToImageFilter.ReadFrontBufferOff();
>
>         windowToImageFilter.Update();
>
>         windowToImageFilter.ReadFrontBufferOff();
>         writer.SetInputConnection(windowToImageFilter.GetOutputPort());
>         writer.SetFileName(tempFile);
>         writer.Write();
>
>
>
> Kind Regards, Fredrik
>
>
>
>
>
>
>
>
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