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itkVTKImageExport.hxx
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itkVTKImageExport.hxx
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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkVTKImageExport_hxx
#define itkVTKImageExport_hxx
#include "itkPixelTraits.h"
#include "itkNumericTraits.h"
#include "itkNumericTraitsArrayPixel.h"
#include "itkNumericTraitsCovariantVectorPixel.h"
#include "itkNumericTraitsDiffusionTensor3DPixel.h"
#include "itkNumericTraitsFixedArrayPixel.h"
#include "itkNumericTraitsPointPixel.h"
#include "itkNumericTraitsRGBPixel.h"
#include "itkNumericTraitsRGBAPixel.h"
#include "itkNumericTraitsTensorPixel.h"
#include "itkNumericTraitsVectorPixel.h"
namespace itk
{
/**
* The constructor records the name of the pixel's scalar type for the
* image to be sent to vtkImageImport's ScalarTypeCallback.
*/
template <typename TInputImage>
VTKImageExport<TInputImage>::VTKImageExport()
{
using PixelType = typename TInputImage::PixelType;
using ScalarType = typename PixelTraits<PixelType>::ValueType;
if (typeid(ScalarType) == typeid(double))
{
m_ScalarTypeName = "double";
}
else if (typeid(ScalarType) == typeid(float))
{
m_ScalarTypeName = "float";
}
else if (typeid(ScalarType) == typeid(long))
{
m_ScalarTypeName = "long";
}
else if (typeid(ScalarType) == typeid(unsigned long))
{
m_ScalarTypeName = "unsigned long";
}
else if (typeid(ScalarType) == typeid(long long))
{
m_ScalarTypeName = "long long";
}
else if (typeid(ScalarType) == typeid(unsigned long long))
{
m_ScalarTypeName = "unsigned long long";
}
else if (typeid(ScalarType) == typeid(int))
{
m_ScalarTypeName = "int";
}
else if (typeid(ScalarType) == typeid(unsigned int))
{
m_ScalarTypeName = "unsigned int";
}
else if (typeid(ScalarType) == typeid(short))
{
m_ScalarTypeName = "short";
}
else if (typeid(ScalarType) == typeid(unsigned short))
{
m_ScalarTypeName = "unsigned short";
}
else if (typeid(ScalarType) == typeid(char))
{
m_ScalarTypeName = "char";
}
else if (typeid(ScalarType) == typeid(unsigned char))
{
m_ScalarTypeName = "unsigned char";
}
else if (typeid(ScalarType) == typeid(signed char))
{
m_ScalarTypeName = "signed char";
}
else
{
itkExceptionMacro("Type currently not supported");
}
}
template <typename TInputImage>
void
VTKImageExport<TInputImage>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
/**
* Set the input image for this filter.
*/
template <typename TInputImage>
void
VTKImageExport<TInputImage>::SetInput(const InputImageType * input)
{
this->ProcessObject::SetNthInput(0, const_cast<TInputImage *>(input));
}
/**
* Get the current input image.
*/
template <typename TInputImage>
auto
VTKImageExport<TInputImage>::GetInput() -> InputImageType *
{
return itkDynamicCastInDebugMode<TInputImage *>(this->ProcessObject::GetInput(0));
}
/**
* Implements the WholeExtentCallback. This returns a pointer to an
* array of six integers describing the VTK-style extent of the image.
* This corresponds to the ITK image's LargestPossibleRegion.
*/
template <typename TInputImage>
int *
VTKImageExport<TInputImage>::WholeExtentCallback()
{
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
InputRegionType region = input->GetLargestPossibleRegion();
InputSizeType size = region.GetSize();
InputIndexType index = region.GetIndex();
unsigned int i = 0;
// Fill in the known portion of the extent.
for (; i < InputImageDimension; ++i)
{
m_WholeExtent[i * 2] = static_cast<int>(index[i]);
m_WholeExtent[i * 2 + 1] = static_cast<int>(index[i] + size[i]) - 1;
}
// Fill in the extent for dimensions up to three.
for (; i < 3; ++i)
{
m_WholeExtent[i * 2] = 0;
m_WholeExtent[i * 2 + 1] = 0;
}
return m_WholeExtent;
}
/**
* Implements the SpacingCallback. This returns a pointer to an array
* of three floating point values describing the spacing of the image.
*/
template <typename TInputImage>
double *
VTKImageExport<TInputImage>::SpacingCallback()
{
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
const typename TInputImage::SpacingType & spacing = input->GetSpacing();
unsigned int i = 0;
// Fill in the known portion of the spacing.
for (; i < InputImageDimension; ++i)
{
m_DataSpacing[i] = static_cast<double>(spacing[i]);
}
// Fill up the spacing with defaults up to three dimensions.
for (; i < 3; ++i)
{
m_DataSpacing[i] = 1;
}
return m_DataSpacing;
}
/**
* Implements the SpacingCallback. This returns a pointer to an array
* of three floating point values describing the spacing of the image.
*/
template <typename TInputImage>
float *
VTKImageExport<TInputImage>::FloatSpacingCallback()
{
InputImagePointer input = this->GetInput();
const typename TInputImage::SpacingType & spacing = input->GetSpacing();
unsigned int i = 0;
// Fill in the known portion of the spacing.
for (; i < InputImageDimension; ++i)
{
m_FloatDataSpacing[i] = static_cast<float>(spacing[i]);
}
// Fill up the spacing with defaults up to three dimensions.
for (; i < 3; ++i)
{
m_FloatDataSpacing[i] = 1;
}
return m_FloatDataSpacing;
}
/**
* Implements the OriginCallback. This returns a pointer to an array
* of three floating point values describing the origin of the image.
*/
template <typename TInputImage>
double *
VTKImageExport<TInputImage>::OriginCallback()
{
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
const typename TInputImage::PointType & origin = input->GetOrigin();
unsigned int i = 0;
// Fill in the known portion of the origin.
for (; i < InputImageDimension; ++i)
{
m_DataOrigin[i] = static_cast<double>(origin[i]);
}
// Fill up the origin with defaults up to three dimensions.
for (; i < 3; ++i)
{
m_DataOrigin[i] = 0;
}
return m_DataOrigin;
}
/**
* Implements the OriginCallback. This returns a pointer to an array
* of three floating point values describing the origin of the image.
*/
template <typename TInputImage>
float *
VTKImageExport<TInputImage>::FloatOriginCallback()
{
InputImagePointer input = this->GetInput();
const typename TInputImage::PointType & origin = input->GetOrigin();
unsigned int i = 0;
// Fill in the known portion of the origin.
for (; i < InputImageDimension; ++i)
{
m_FloatDataOrigin[i] = static_cast<float>(origin[i]);
}
// Fill up the origin with defaults up to three dimensions.
for (; i < 3; ++i)
{
m_FloatDataOrigin[i] = 0;
}
return m_FloatDataOrigin;
}
/**
* Implements the DirectionCallback. This returns a pointer to an array
* of nine floating point values describing the direction of the image.
*/
template <typename TInputImage>
double *
VTKImageExport<TInputImage>::DirectionCallback()
{
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
const typename TInputImage::DirectionType & direction = input->GetDirection();
// Fill in the direction.
for (unsigned int i = 0; i < 3; ++i)
{
for (unsigned int j = 0; j < 3; ++j)
{
if (i >= InputImageDimension || j >= InputImageDimension)
{
// Fill up with defaults up to three dimensions.
m_DataDirection[i * 3 + j] = (i == j) ? 1.0 : 0.0;
}
else
{
m_DataDirection[i * 3 + j] = static_cast<double>(direction[i][j]);
}
}
}
return m_DataDirection;
}
/**
* Implements the ScalarTypeCallback. This returns the name of the
* scalar value type of the image.
*/
template <typename TInputImage>
const char *
VTKImageExport<TInputImage>::ScalarTypeCallback()
{
return m_ScalarTypeName.c_str();
}
/**
* Implements the NumberOfComponentsCallback. This returns the number of
* components per pixel for the image.
*
* Currently, only one pixel component is supported by this class.
*/
template <typename TInputImage>
int
VTKImageExport<TInputImage>::NumberOfComponentsCallback()
{
using PixelType = typename TInputImage::PixelType;
return static_cast<int>(NumericTraits<PixelType>::GetLength());
}
/**
* Implements the PropagateUpdateExtentCallback. This takes the
* update extent from VTK and translates it into a RequestedRegion for
* the input image. This requested region is then propagated through
* the ITK pipeline.
*/
template <typename TInputImage>
void
VTKImageExport<TInputImage>::PropagateUpdateExtentCallback(int * extent)
{
InputSizeType size;
InputIndexType index;
for (unsigned int i = 0; i < InputImageDimension; ++i)
{
index[i] = extent[i * 2];
size[i] = (extent[i * 2 + 1] - extent[i * 2]) + 1;
}
const InputRegionType region(index, size);
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
input->SetRequestedRegion(region);
}
/**
* Implements the DataExtentCallback. This returns a pointer to an
* array of six integers describing the VTK-style extent of the
* buffered portion of the image. This corresponds to the ITK image's
* BufferedRegion.
*/
template <typename TInputImage>
int *
VTKImageExport<TInputImage>::DataExtentCallback()
{
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
InputRegionType region = input->GetBufferedRegion();
InputSizeType size = region.GetSize();
InputIndexType index = region.GetIndex();
unsigned int i = 0;
for (; i < InputImageDimension; ++i)
{
m_DataExtent[i * 2] = static_cast<int>(index[i]);
m_DataExtent[i * 2 + 1] = static_cast<int>(index[i] + size[i]) - 1;
}
for (; i < 3; ++i)
{
m_DataExtent[i * 2] = 0;
m_DataExtent[i * 2 + 1] = 0;
}
return m_DataExtent;
}
/**
* Implements the BufferPointerCallback. This returns a pointer to
* the image's memory buffer.
*/
template <typename TInputImage>
void *
VTKImageExport<TInputImage>::BufferPointerCallback()
{
InputImagePointer input = this->GetInput();
if (!input)
{
itkExceptionMacro("Need to set an input");
}
return input->GetBufferPointer();
}
} // end namespace itk
#endif