[vtkusers] IsRenderSupported method crash

[EvilMax]

Hello!


I have a problem working with VTK rendering panel and ray cast mapping in
Java application.  It runs once, but crashes on second attempt when getting
render capablities. Code is following:


//  Get rendering panel
		RistorRenderWindowPanel rp = getRenderingPanel().getRenderWindowPanel(0);
		vtkVolumeProperty volumeProperty = new vtkVolumeProperty();
// Setup opacity/colo transfer functions
		TransferFunctionPreset preset = model.getPreset().clone();
		volumeProperty.SetScalarOpacity(preset
				.getScalarOpacityFunction().convertToVTK(model.getOffset()));
		volumeProperty.SetColor(model.getPreset().getColorTransferFunction()
				.convertToVTK(model.getOffset()));
		volumeProperty.ShadeOn();
		volumeProperty.SetInterpolationTypeToLinear();

// Add ray cast mapper to use OpenGL hardware accelerated ray casting
		vtkVolumeMapper rayCastMapper;
		vtkGPUVolumeRayCastMapper gpuMapper = new
vtkOpenGLGPUVolumeRayCastMapper();


		rayCastMapper = gpuMapper;
		rayCastMapper.SetBlendModeToComposite();
		rayCastMapper.SetInput(model.getVolume());

// Create volume and add to it property and mapper
		vtkVolume volume = getVolume();
		volume.SetMapper(rayCastMapper);
		volume.SetProperty(volumeProperty);
		
// Bind to render panel
		rp.GetRenderer().AddViewProp(volume);

// Pre-render and test capabilities
                rp.Render();
		if(gpuMapper.IsRenderSupported(rp.GetRenderWindow(), volumeProperty)==0)		
		{
			rayCastMapper = new vtkVolumeRayCastMapper();
			((vtkVolumeRayCastMapper)
rayCastMapper).SetVolumeRayCastFunction(compositeFunction);
			rayCastMapper.SetBlendModeToComposite();
			rayCastMapper.SetInput(model.getVolume());
		}


After that resetCamera() and Render()  methods are called to perform clean
render. Render window panel is embedded to Java Swing panel and pipeline
creation and render are called upon showing it. But on second showing JVM
crashed on *if(gpuMapper.IsRenderSupported(rp.GetRenderWindow(),
volumeProperty)==0)* code. JVM complains on msvcr100.dll and stack trace to
raycast mapper. In VTK log file I see following:

*ERROR: In vtkWin32OpenGLRenderWindow.cxx, line 247
vtkWin32OpenGLRenderWindow (0503DA78): wglMakeCurrent failed in
MakeCurrent(), error: The handle is invalid.*

I've searched this lilsts and found some proposals. So I've created
'finalizing' code:


void shutdown()
	{
		RistorRenderWindowPanel rp = getRenderingPanel().getRenderWindowPanel(0);
		if (rp !=null)
		{
			if (rp.GetRenderer() != null)
			{
				rp.GetRenderer().RemoveAllViewProps();
				rp.GetRenderWindow().GetInteractor().SetRenderWindow(null);				
				if (rp.GetRenderWindow().GetInteractor() != null)
				{
					LOG.info("Delete interactor");
					rp.GetRenderWindow().GetInteractor().Delete();
				}
				rp.GetRenderer().GetRenderWindow().Finalize();
				rp.GetRenderer().GetRenderWindow().Delete();
				rp.GetRenderer().Delete();
			}
		}
		System.gc();
}


It seems somehow redundant, but this is code from several experiments.
Anyway it has no effect: crash on second pipeline building is inevitable. 

More experiments. If not to render, just build pipeline, second 'shutdown'
crashes on rp.GetRenderer().RemoveAllViewProps();  In this time JVM complans
to vtkFiltering.dll and removing viewprops method.


Stack: [0x0a7d0000,0x0a820000],  sp=0x0a81e8a0,  free space=314k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native
code)
C  [vtkFiltering.dll+0x139293]
j  vtk.vtkViewport.RemoveAllViewProps_6()V+0
[..skip..]


Need any help that VTK guru's can provide.

P.S. Some more diagnostics data.
VTK 5.6.1  (build with VS2010)
JVM: 6.0_24 b07

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