vtkVolume16Reader.h

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

  Program:   Visualization Toolkit
  Module:    vtkVolume16Reader.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 vtkVolume16Reader_h
#define vtkVolume16Reader_h

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

class vtkTransform;
class vtkUnsignedCharArray;
class vtkUnsignedShortArray;

#define VTK_FILE_BYTE_ORDER_BIG_ENDIAN 0
#define VTK_FILE_BYTE_ORDER_LITTLE_ENDIAN 1

class VTKIOIMAGE_EXPORT vtkVolume16Reader : public vtkVolumeReader
{
public:
  vtkTypeMacro(vtkVolume16Reader,vtkVolumeReader);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkVolume16Reader *New();


  vtkSetVector2Macro(DataDimensions,int);
  vtkGetVectorMacro(DataDimensions,int,2);


  vtkSetMacro(DataMask,unsigned short);
  vtkGetMacro(DataMask,unsigned short);


  vtkSetMacro(HeaderSize,int);
  vtkGetMacro(HeaderSize,int);


  void SetDataByteOrderToBigEndian();
  void SetDataByteOrderToLittleEndian();
  int GetDataByteOrder();
  void SetDataByteOrder(int);
  const char *GetDataByteOrderAsString();


  vtkSetMacro(SwapBytes,vtkTypeBool);
  vtkGetMacro(SwapBytes,vtkTypeBool);
  vtkBooleanMacro(SwapBytes,vtkTypeBool);


  virtual void SetTransform(vtkTransform*);
  vtkGetObjectMacro(Transform,vtkTransform);

  vtkImageData *GetImage(int ImageNumber) override;

protected:
  vtkVolume16Reader();
  ~vtkVolume16Reader() override;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;
  int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;
  int   DataDimensions[2];
  unsigned short DataMask;
  vtkTypeBool   SwapBytes;
  int   HeaderSize;
  vtkTransform *Transform;

  void TransformSlice (unsigned short *slice, unsigned short *pixels, int k, int dimensions[3], int bounds[3]);
  void ComputeTransformedDimensions(int dimensions[3]);
  void ComputeTransformedBounds(int bounds[6]);
  void ComputeTransformedSpacing(double Spacing[3]);
  void ComputeTransformedOrigin(double origin[3]);
  void AdjustSpacingAndOrigin(int dimensions[3], double Spacing[3], double origin[3]);
  void ReadImage(int ImageNumber, vtkUnsignedShortArray *);
  void ReadVolume(int FirstImage, int LastImage, vtkUnsignedShortArray *);
  int Read16BitImage(FILE *fp, unsigned short *pixels, int xsize, int ysize,
                     int skip, int swapBytes);

private:
  vtkVolume16Reader(const vtkVolume16Reader&) = delete;
  void operator=(const vtkVolume16Reader&) = delete;
};

#endif