itkMetaImageIO.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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 itkMetaImageIO_h
#define itkMetaImageIO_h
#include "ITKIOMetaExport.h"


#include <fstream>
#include "itkImageIOBase.h"
#include "itkSingletonMacro.h"
#include "metaObject.h"
#include "metaImage.h"

namespace itk
{
class ITKIOMeta_EXPORT MetaImageIO:public ImageIOBase
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(MetaImageIO);

  using Self = MetaImageIO;
  using Superclass = ImageIOBase;
  using Pointer = SmartPointer< Self >;

  itkNewMacro(Self);

  itkTypeMacro(MetaImageIO, Superclass);

  bool SupportsDimension(unsigned long) override
  {
    return true;
  }

  /*-------- This part of the interfaces deals with reading data. ----- */

  bool CanReadFile(const char *) override;

  void ReadImageInformation() override;

  void Read(void *buffer) override;

  MetaImage * GetMetaImagePointer();

  /*-------- This part of the interfaces deals with writing data. ----- */

  bool CanWriteFile(const char *) override;

  void WriteImageInformation() override;

  void Write(const void *buffer) override;

  virtual void SetDataFileName(const char *filename);

  virtual void SetDoublePrecision(unsigned int precision)
  {
    m_MetaImage.SetDoublePrecision(precision);
  }

  ImageIORegion
  GenerateStreamableReadRegionFromRequestedRegion(const ImageIORegion & requested) const override;

  unsigned int
  GetActualNumberOfSplitsForWriting(unsigned int numberOfRequestedSplits,
                                    const ImageIORegion & pasteRegion,
                                    const ImageIORegion & largestPossibleRegion) override;

  ImageIORegion
  GetSplitRegionForWriting(unsigned int ithPiece,
                           unsigned int numberOfActualSplits,
                           const ImageIORegion & pasteRegion,
                           const ImageIORegion & largestPossibleRegion) override;

  bool CanStreamRead() override
  {
    if ( m_MetaImage.CompressedData() )
      {
      return false;
      }
    return true;
  }

  bool CanStreamWrite() override
  {
    if ( this->GetUseCompression() )
      {
      return false;
      }
    return true;
  }

  itkSetMacro(SubSamplingFactor, unsigned int);
  itkGetConstMacro(SubSamplingFactor, unsigned int);

  static void SetDefaultDoublePrecision(unsigned int precision);
  static unsigned int GetDefaultDoublePrecision();

protected:
  MetaImageIO();
  ~MetaImageIO() override;
  void PrintSelf(std::ostream & os, Indent indent) const override;

private:
  itkGetGlobalDeclarationMacro(unsigned int, DefaultDoublePrecision);

  MetaImage m_MetaImage;

  unsigned int m_SubSamplingFactor;

  static unsigned int * m_DefaultDoublePrecision;
};
} // end namespace itk

#endif // itkMetaImageIO_h