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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* 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
*
* http://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 _itkImageFileCastWriter_hxx
#define _itkImageFileCastWriter_hxx
#include "itkImageFileCastWriter.h"
#include "itkDataObject.h"
#include "itkDeref.h"
#include "itkObjectFactoryBase.h"
#include "itkImageIOFactory.h"
#include "itkCommand.h"
#include <vnl/vnl_vector.h>
#include "itkVectorImage.h"
#include "itkDefaultConvertPixelTraits.h"
#include <iomanip>
namespace itk
{
//---------------------------------------------------------
template <typename TInputImage>
std::string
ImageFileCastWriter<TInputImage>::GetDefaultOutputComponentType()
{
using PixelType = typename TInputImage::InternalPixelType;
return ImageIOBase::GetComponentTypeAsString(ImageIOBase::MapPixelType<PixelType>::CType);
}
//---------------------------------------------------------
template <typename TInputImage>
void
ImageFileCastWriter<TInputImage>::GenerateData()
{
const TInputImage & input = Deref(this->GetInput());
itkDebugMacro("Writing file: " << this->GetFileName());
ImageIOBase & imageIO = Deref(this->GetModifiableImageIO());
// Make sure that the image is the right type and no more than
// four components.
using ScalarType = typename TInputImage::PixelType;
if (strcmp(input.GetNameOfClass(), "VectorImage") == 0)
{
using VectorImageScalarType = typename TInputImage::InternalPixelType;
imageIO.SetPixelTypeInfo(static_cast<const VectorImageScalarType *>(nullptr));
using AccessorFunctorType = typename TInputImage::AccessorFunctorType;
imageIO.SetNumberOfComponents(AccessorFunctorType::GetVectorLength(&input));
}
else
{
// Set the pixel and component type; the number of components.
imageIO.SetPixelTypeInfo(static_cast<const ScalarType *>(nullptr));
}
/** Setup the image IO for writing. */
imageIO.SetFileName(this->GetFileName());
/** Get the number of Components */
unsigned int numberOfComponents = imageIO.GetNumberOfComponents();
/** Extract the data as a raw buffer pointer and possibly convert.
* Converting is only possible if the number of components equals 1 */
if (m_OutputComponentType != ImageIOBase::GetComponentTypeAsString(imageIO.GetComponentType()) &&
m_OutputComponentType != elx::PixelTypeToString<ScalarType>() && numberOfComponents == 1)
{
const void * const convertedDataBuffer = [this, &input] {
/** convert the scalar image to a scalar image with another componenttype
* The imageIO's PixelType is also changed */
if (m_OutputComponentType == "char")
{
return this->ConvertScalarImage<char>(input);
}
if (m_OutputComponentType == "unsigned_char")
{
return this->ConvertScalarImage<unsigned char>(input);
}
if (m_OutputComponentType == "short")
{
return this->ConvertScalarImage<short>(input);
}
if (m_OutputComponentType == "unsigned_short")
{
return this->ConvertScalarImage<unsigned short>(input);
}
if (m_OutputComponentType == "int")
{
return this->ConvertScalarImage<int>(input);
}
if (m_OutputComponentType == "unsigned_int")
{
return this->ConvertScalarImage<unsigned int>(input);
}
if (m_OutputComponentType == "long")
{
return this->ConvertScalarImage<long>(input);
}
if (m_OutputComponentType == "unsigned_long")
{
return this->ConvertScalarImage<unsigned long>(input);
}
if (m_OutputComponentType == "float")
{
return this->ConvertScalarImage<float>(input);
}
if (m_OutputComponentType == "double")
{
return this->ConvertScalarImage<double>(input);
}
return ConvertScalarImageAsSpecifiedByFixedWidthPixelType<std::int8_t,
std::uint8_t,
std::int16_t,
std::uint16_t,
std::int32_t,
std::uint32_t,
std::int64_t,
std::uint64_t,
float,
double>(input);
}();
if (convertedDataBuffer == nullptr)
{
itkExceptionMacro("Unable to convert the input image. An unknown or unsupported component type was specified: "
<< std::quoted(m_OutputComponentType) << ".");
}
/** Do the writing */
imageIO.Write(convertedDataBuffer);
/** Release the caster's memory */
m_Caster = nullptr;
}
else
{
/** No casting needed or possible, just write */
const void * dataPtr = input.GetBufferPointer();
imageIO.Write(dataPtr);
}
}
} // end namespace itk
#endif
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