itkImageFileCastWriter.h

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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_h
#define __itkImageFileCastWriter_h
 
#include "itkImageFileWriter.h"
#include "itkImageIOBase.h"
#include "itkMacro.h"
#include "itkSize.h"
#include "itkImageIORegion.h"
#include "itkCastImageFilter.h"
 
namespace itk
{
 
template< class TInputImage >
class ITKIOImageBase_HIDDEN ImageFileCastWriter : public ImageFileWriter< TInputImage >
{
public:
 
  typedef ImageFileCastWriter            Self;
  typedef ImageFileWriter< TInputImage > Superclass;
  typedef SmartPointer< Self >           Pointer;
  typedef SmartPointer< const Self >     ConstPointer;
 
  itkNewMacro( Self );
 
  itkTypeMacro( ImageFileCastWriter, ImageFileWriter );
 
  typedef typename Superclass::InputImageType       InputImageType;
  typedef typename Superclass::InputImagePointer    InputImagePointer;
  typedef typename Superclass::InputImageRegionType InputImageRegionType;
  typedef typename Superclass::InputImagePixelType  InputImagePixelType;
 
  itkStaticConstMacro( InputImageDimension, unsigned int, InputImageType::ImageDimension );
 
  itkSetStringMacro( OutputComponentType );
  itkGetStringMacro( OutputComponentType );
 
  std::string GetDefaultOutputComponentType( void ) const;
 
protected:
 
  ImageFileCastWriter();
  ~ImageFileCastWriter() override;
 
  void GenerateData( void ) override;
 
  template< class OutputComponentType >
  void * ConvertScalarImage( const DataObject * inputImage,
    const OutputComponentType & itkNotUsed( dummy ) )
  {
    typedef Image< OutputComponentType, InputImageDimension >      DiskImageType;
    typedef typename PixelTraits< InputImagePixelType >::ValueType InputImageComponentType;
    typedef Image< InputImageComponentType, InputImageDimension >  ScalarInputImageType;
    typedef CastImageFilter< ScalarInputImageType, DiskImageType > CasterType;
 
    //this->GetImageIO()->SetPixelTypeInfo( typeid(OutputComponentType) );
    this->GetModifiableImageIO()->SetPixelTypeInfo( static_cast< const OutputComponentType * >( 0 ) );
 
    typename CasterType::Pointer caster                    = CasterType::New();
    this->m_Caster                                         = caster;
    typename ScalarInputImageType::Pointer localInputImage = ScalarInputImageType::New();
 
    localInputImage->Graft( static_cast< const ScalarInputImageType * >(inputImage) );
 
    caster->SetInput( localInputImage );
    caster->Update();
 
    OutputComponentType * pixelBuffer     = caster->GetOutput()->GetBufferPointer();
    void *                convertedBuffer = static_cast< void * >( pixelBuffer );
    return convertedBuffer;
  }
 
 
  ProcessObject::Pointer m_Caster;
 
private:
 
  ImageFileCastWriter( const Self & ); // purposely not implemented
  void operator=( const Self & );      // purposely not implemented
 
  std::string m_OutputComponentType;
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageFileCastWriter.hxx"
#endif
 
#endif // __itkImageFileCastWriter_h