[vtkusers] Problem using DirectX with vtkImageReslice

[Sebastian Schuberth]

Hi all,

I'm having some strange issues with the following code:

----(begin)----

float *pImageData; // Pointer to a floating-point grayscale image.
int nWidth=512,nHeight=721; // Width and height of the image.

vtkImageReslice  *pImageReslice = vtkImageReslice::New();

vtkImageData *pvtkImageData = vtkImageData::New();
pvtkImageData->SetDimensions(nWidth,nHeight,1);
pvtkImageData->SetScalarType(VTK_FLOAT);
pvtkImageData->SetNumberOfScalarComponents(1);
memcpy(pvtkImageData->GetScalarPointer(),pImageData,nWidth*nHeight*sizeof(float));

pImageReslice->SetInput(pvtkImageData);
// Some image transformations were omitted here for simplicity.
pImageReslice->Update();
float *pfData = (float*)pImageReslice->GetOutput()->GetScalarPointer();
memcpy(pImageData,pfData,sizeof(float)*nWidth*nHeight);

pvtkImageData->Delete();
pvtkImageData= NULL;
pImageReslice->Delete();
pImageReslice = NULL;

----(end)----

Because I've omitted some transformation operations, the code above just 
copies the image from and back to pImageData. It works just fine until I 
create a DirectX device *before* the code above:

----(begin)----

HWND m_window_handle=::GetDesktopWindow();

IDirect3D9 *m_d3d9_object=Direct3DCreate9(D3D_SDK_VERSION);
if (!m_d3d9_object)
     return;

D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp,sizeof(d3dpp));
d3dpp.Windowed               = TRUE;
d3dpp.SwapEffect             = D3DSWAPEFFECT_DISCARD,
d3dpp.BackBufferFormat       = D3DFMT_UNKNOWN;
d3dpp.Flags                  = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;
d3dpp.PresentationInterval   = D3DPRESENT_INTERVAL_IMMEDIATE;
d3dpp.EnableAutoDepthStencil = FALSE;

IDirect3DDevice9 *m_d3d9_device;
if 
(FAILED(m_d3d9_object->CreateDevice(0,D3DDEVTYPE_HAL,m_window_handle,D3DCREATE_HARDWARE_VERTEXPROCESSING,&d3dpp, 
&m_d3d9_device))) return;

----(end)----

If I comment out the line which contains the call to CreateDevice all 
works fine again. Any ideas what happening? Does vtkImageReslice 
internally even use DirectX in any way?

Thanks for any hints.

-- 
Sebastian Schuberth