[vtkusers] Problem using DirectX with vtkImageReslice

[Sebastian Schuberth]

I've inserted

pvtkImageData->Initialize();

directly after

vtkImageData *pvtkImageData = vtkImageData::New();

but that didn't change anything. To be more precise on the artifacts I'm 
seeing: It seems only the bottom half of the image gets copied correctly 
when the DX call to CreateDevice is in there, the top half is black. 
Again, if I just leave out the call to CreateDevice, the whole image is 
copied correctly. Very weird.

-- 
Sebastian Schuberth

Randall Hand wrote:

> I just noticed that you don't call "Initialize" for your vtkImageData 
> anywhere. Could that have something to do with it?
> 
> On 6/9/05, Sebastian Schuberth <s.schuberth at tu-bs.de> wrote:
> 
>>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
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