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

  Program:   Visualization Toolkit
  Module:    vtkNIFTIImageReader.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/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 notice for more information.

=========================================================================*/
#ifndef vtkNIFTIImageReader_h
#define vtkNIFTIImageReader_h

#include "vtkIOImageModule.h" // For export macro
#include "vtkImageReader2.h"

class vtkNIFTIImageHeader;
class vtkMatrix4x4;

struct nifti_1_header;

//----------------------------------------------------------------------------
class VTKIOIMAGE_EXPORT vtkNIFTIImageReader : public vtkImageReader2
{
public:

  static vtkNIFTIImageReader *New();
  vtkTypeMacro(vtkNIFTIImageReader, vtkImageReader2);

  virtual void PrintSelf(ostream& os, vtkIndent indent);


  virtual const char* GetFileExtensions() {
    return ".nii .nii.gz .img .img.gz .hdr .hdr.gz"; }


  virtual const char* GetDescriptiveName() {
    return "NIfTI"; }

  int CanReadFile(const char* filename);


  vtkGetMacro(TimeAsVector, bool);
  vtkSetMacro(TimeAsVector, bool);
  vtkBooleanMacro(TimeAsVector, bool);


  int GetTimeDimension() { return this->Dim[4]; }
  double GetTimeSpacing() { return this->PixDim[4]; }


  double GetRescaleSlope() { return this->RescaleSlope; }
  double GetRescaleIntercept() { return this->RescaleIntercept; }

  double GetQFac() { return this->QFac; }

  vtkMatrix4x4 *GetQFormMatrix() { return this->QFormMatrix; }

  vtkMatrix4x4 *GetSFormMatrix() { return this->SFormMatrix; }

  vtkNIFTIImageHeader *GetNIFTIHeader();

protected:
  vtkNIFTIImageReader();
  ~vtkNIFTIImageReader();


  virtual int RequestInformation(
    vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector);


  virtual int RequestData(
    vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector);

  static bool CheckExtension(const char *fname, const char *ext);


  static char *ReplaceExtension(
    const char *fname, const char *ext1, const char *ext2);

  static int CheckNIFTIVersion(const nifti_1_header *hdr);

  static bool CheckAnalyzeHeader(const nifti_1_header *hdr);

  bool TimeAsVector;


  double RescaleIntercept;
  double RescaleSlope;

  double QFac;


  vtkMatrix4x4 *QFormMatrix;
  vtkMatrix4x4 *SFormMatrix;

  int Dim[8];

  double PixDim[8];

  vtkNIFTIImageHeader *NIFTIHeader;

private:
  vtkNIFTIImageReader(const vtkNIFTIImageReader&);  // Not implemented.
  void operator=(const vtkNIFTIImageReader&);  // Not implemented.
};

#endif // vtkNIFTIImageReader_h