Method Export

IO/Image/vtkImageExport.cxx:124–158

------------------------------------------------------------------------------ Exports all the data from the input.

//------------------------------------------------------------------------------
// Exports all the data from the input.
void vtkImageExport::Export(void* output)
{
  void* ptr = this->GetPointerToData();
  if (!ptr)
  {
    // GetPointerToData() outputs an error message.
    return;
  }

  if (this->ImageLowerLeft)
  {
    memcpy(output, ptr, this->GetDataMemorySize());
  }
  else
  { // flip the image when it is output
    int* extent =
      this->GetInputInformation()->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT());
    int xsize = extent[1] - extent[0] + 1;
    int ysize = extent[3] - extent[2] + 1;
    int zsize = extent[5] - extent[4] + 1;
    int csize = this->GetInput()->GetScalarSize() * this->GetInput()->GetNumberOfScalarComponents();

    for (vtkIdType i = 0; i < zsize; i++)
    {
      ptr = static_cast<void*>(static_cast<char*>(ptr) + ysize * xsize * csize);
      for (vtkIdType j = 0; j < ysize; j++)
      {
        ptr = static_cast<void*>(static_cast<char*>(ptr) - xsize * csize);
        memcpy(output, ptr, xsize * csize);
        output = static_cast<void*>(static_cast<char*>(output) + xsize * csize);
      }
      ptr = static_cast<void*>(static_cast<char*>(ptr) + ysize * xsize * csize);
    }
  }
}

//------------------------------------------------------------------------------
// Provides a valid pointer to the data (only valid until the next