Method ThreadedRequestData

Imaging/General/vtkImageVariance3D.cxx:259–295

------------------------------------------------------------------------------ This method contains the first switch statement that calls the correct templated function for the input and output Data types. It handles image boundaries, so the image does not shrink.

// templated function for the input and output Data types.
// It handles image boundaries, so the image does not shrink.
void vtkImageVariance3D::ThreadedRequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* vtkNotUsed(outputVector),
  vtkImageData*** inData, vtkImageData** outData, int outExt[6], int id)
{
  int inExt[6], wholeExt[6];
  vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
  inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), wholeExt);
  this->InternalRequestUpdateExtent(inExt, outExt, wholeExt);
  void* inPtr = inData[0][0]->GetScalarPointerForExtent(inExt);
  void* outPtr = outData[0]->GetScalarPointerForExtent(outExt);
  vtkImageData* mask;

  // Error checking on mask
  mask = this->Ellipse->GetOutput();
  if (mask->GetScalarType() != VTK_UNSIGNED_CHAR)
  {
    vtkErrorMacro(<< "Execute: mask has wrong scalar type");
    return;
  }

  // this filter expects the output to be float
  if (outData[0]->GetScalarType() != VTK_FLOAT)
  {
    vtkErrorMacro(<< "Execute: output ScalarType, "
                  << vtkImageScalarTypeNameMacro(outData[0]->GetScalarType()) << " must be float");
    return;
  }

  switch (inData[0][0]->GetScalarType())
  {
    vtkTemplateMacro(vtkImageVariance3DExecute(this, mask, inData[0][0],
      static_cast<VTK_TT*>(inPtr), outData[0], outExt, static_cast<float*>(outPtr), id, inInfo));
    default:
      vtkErrorMacro(<< "Execute: Unknown ScalarType");
      return;
  }
}

//------------------------------------------------------------------------------
int vtkImageVariance3D::RequestData(