[vtkusers] vtkWindowToImageFilter problem

[David Doria]

On Thu, Jun 16, 2011 at 5:01 AM, Leguay Romain <
romain.leguay at etu.u-bordeaux1.fr> wrote:

> Hello everyone!
> I want to do a screenshot of my scene. To do this I follow the example
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/Screenshot.
> For information, I work on a java project.
> My application closes itself without errors.
> I send you my code:
>
> public void saveScreenshot(String fileName) {
>
>                vtkWindowToImageFilter windowToImageFilter = new
> vtkWindowToImageFilter();
>
>  windowToImageFilter.SetInput(fr.cea.visualization.renderer.Activator
>
>  .getDefault().getRenderer().getPanel().GetRenderWindow());
>                windowToImageFilter.SetMagnification(magnification); //pour
> augmenter la résolution
>                windowToImageFilter.SetInputBufferTypeToRGBA(); //pour lire
> toutes les composantes couleurs
>
>               windowToImageFilter.Update(); // <<<<----- when I launch the
> Update method, nothing appends and my application closes itself
>
>                switch (type) {
>                case JPEG:
>                        vtkJPEGWriter jpegWriter = new vtkJPEGWriter();
>                        jpegWriter.SetFileName(fileName);
>
>  jpegWriter.SetInput(windowToImageFilter.GetOutput());
>                        jpegWriter.Write();
>                        break;
>                case PNG:
>                        vtkPNGWriter pngWriter = new vtkPNGWriter();
>                        pngWriter.SetFileName(fileName);
>                        pngWriter.SetInput(windowToImageFilter.GetOutput());
>                        pngWriter.Write();
>                        break;
>                default:
>                        return;
>                }
>        }
>
> I don't understand why this code doesn't work.
> Has anyone got any ideas?
>
> Thanks,
> Romain
>

Did you see the Java section of the examples?
http://www.vtk.org/Wiki/VTK/Examples/Java/Miscellaneous/Screenshot

David
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