itkImageFileReader.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkImageFileReader.h,v $
  Language:  C++
  Date:      $Date: 2003/03/18 03:28:25 $
  Version:   $Revision: 1.13.2.1 $

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkImageFileReader_h
#define __itkImageFileReader_h

#include "itkImageIOBase.h"
#include "itkImageSource.h"
#include "itkExceptionObject.h"
#include "itkSize.h"
#include "itkImageRegion.h"
#include "itkDefaultConvertPixelTraits.h"

namespace itk
{

class ImageFileReaderException : public ExceptionObject 
{
public:
  itkTypeMacro( ImageFileReaderException, ExceptionObject );

  ImageFileReaderException(char *file, unsigned int line, 
                           const char* message = "Error in IO") : 
    ExceptionObject(file, line)
    {
      SetDescription(message);
    }

  ImageFileReaderException(const std::string &file, unsigned int line, 
                           const char* message = "Error in IO") : 
    ExceptionObject(file, line)
    {
      SetDescription(message);
    }
};


template <class TOutputImage,
  class ConvertPixelTraits = 
DefaultConvertPixelTraits< ITK_TYPENAME TOutputImage::PixelType> >
class ITK_EXPORT ImageFileReader : public ImageSource<TOutputImage>
{
public:
  typedef ImageFileReader         Self;
  typedef ImageSource<TOutputImage>  Superclass;
  typedef SmartPointer<Self>  Pointer;
  
  itkNewMacro(Self);

  itkTypeMacro(ImageFileReader, ImageSource);

  typedef typename TOutputImage::SizeType  SizeType;

  typedef typename TOutputImage::RegionType  ImageRegionType;

  typedef typename TOutputImage::PixelType OutputImagePixelType;
  
  itkSetStringMacro(FileName);
  itkGetStringMacro(FileName);
  
  itkSetStringMacro(FilePrefix);
  itkGetStringMacro(FilePrefix);
  
  itkSetStringMacro(FilePattern);
  itkGetStringMacro(FilePattern);
  
  void  SetImageIO( ImageIOBase * imageIO );
  itkGetObjectMacro(ImageIO,ImageIOBase);
  
  virtual void GenerateOutputInformation(void);

  virtual void EnlargeOutputRequestedRegion(DataObject *output);

  
protected:
  ImageFileReader();
  ~ImageFileReader();
  void PrintSelf(std::ostream& os, Indent indent) const;
  
  void DoConvertBuffer(void* buffer, unsigned long numberOfPixels);

  virtual void GenerateData();

  ImageIOBase::Pointer m_ImageIO;
  bool m_UserSpecifiedImageIO; //keep track whether the ImageIO is user specified

  std::string m_FileName;
  std::string m_FilePrefix;
  std::string m_FilePattern;
  
private:
  ImageFileReader(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
};


} //namespace ITK

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageFileReader.txx"
#endif

#endif // __itkImageFileReader_h

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