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imaging/vtkImageReader.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImageReader.h,v $
  Language:  C++

Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
#ifndef __vtkImageReader_h
#define __vtkImageReader_h

#include "vtkImageSource.h"
#include "vtkTransform.h"

#define VTK_FILE_BYTE_ORDER_BIG_ENDIAN 0
#define VTK_FILE_BYTE_ORDER_LITTLE_ENDIAN 1

class VTK_EXPORT vtkImageReader : public vtkImageSource
{
public:
  static vtkImageReader *New();
  vtkTypeMacro(vtkImageReader,vtkImageSource);
  void PrintSelf(ostream& os, vtkIndent indent);   

  void SetFileName(const char *);
  vtkGetStringMacro(FileName);

  void SetFilePrefix(const char *);
  vtkGetStringMacro(FilePrefix);

  void SetFilePattern(const char *);
  vtkGetStringMacro(FilePattern);

  void SetDataScalarType(int type);
  void SetDataScalarTypeToFloat(){this->SetDataScalarType(VTK_FLOAT);}
  void SetDataScalarTypeToDouble(){this->SetDataScalarType(VTK_DOUBLE);}
  void SetDataScalarTypeToInt(){this->SetDataScalarType(VTK_INT);}
  void SetDataScalarTypeToShort(){this->SetDataScalarType(VTK_SHORT);}
  void SetDataScalarTypeToUnsignedShort()
    {this->SetDataScalarType(VTK_UNSIGNED_SHORT);}
  void SetDataScalarTypeToUnsignedChar()
    {this->SetDataScalarType(VTK_UNSIGNED_CHAR);}

  vtkGetMacro(DataScalarType, int);

  vtkSetMacro(NumberOfScalarComponents,int);
  vtkGetMacro(NumberOfScalarComponents,int);
  
  vtkSetVector6Macro(DataExtent,int);
  vtkGetVector6Macro(DataExtent,int);
  
  vtkSetVector6Macro(DataVOI,int);
  vtkGetVector6Macro(DataVOI,int);
  
  vtkSetMacro(FileDimensionality, int);
  int GetFileDimensionality() {return this->FileDimensionality;}
  
  vtkSetVector3Macro(DataSpacing,float);
  vtkGetVector3Macro(DataSpacing,float);
  
  vtkSetVector3Macro(DataOrigin,float);
  vtkGetVector3Macro(DataOrigin,float);

  int GetHeaderSize();
  int GetHeaderSize(int slice);

  void SetHeaderSize(int size);
  
  vtkGetMacro(DataMask,unsigned short);
  void SetDataMask(int val) 
       {if (val == this->DataMask) { return; }
        this->DataMask = ((unsigned short)(val)); this->Modified();}
  
  vtkSetObjectMacro(Transform,vtkTransform);
  vtkGetObjectMacro(Transform,vtkTransform);

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

  vtkSetMacro(SwapBytes,int);
  int GetSwapBytes() {return this->SwapBytes;}
  vtkBooleanMacro(SwapBytes,int);

//BTX
  ifstream *GetFile() {return this->File;}
  vtkGetVectorMacro(DataIncrements,unsigned long,4);
//ETX

  // Warning !!!
  // following should only be used by methods or template helpers, not users
  void ComputeInverseTransformedExtent(int inExtent[6],
                   int outExtent[6]);
  void ComputeInverseTransformedIncrements(int inIncr[3],
                  int outIncr[3]);

  void OpenFile();
  void OpenAndSeekFile(int extent[6], int slice);

  vtkBooleanMacro(FileLowerLeft, int);
  vtkGetMacro(FileLowerLeft, int);
  vtkSetMacro(FileLowerLeft, int);

  void ComputeInternalFileName(int slice);
  vtkGetStringMacro(InternalFileName);
  
  
protected:
  vtkImageReader();
  ~vtkImageReader();
  vtkImageReader(const vtkImageReader&) {};
  void operator=(const vtkImageReader&) {};

  char *InternalFileName;
  char *FileName;
  char *FilePrefix;
  char *FilePattern;
  int NumberOfScalarComponents;
  int FileLowerLeft;

  ifstream *File;
  unsigned long DataIncrements[4];
  int DataExtent[6];
  unsigned short DataMask;  // Mask each pixel with ...
  int SwapBytes;

  int FileDimensionality;
  int HeaderSize;
  int DataScalarType;
  int ManualHeaderSize;
  int Initialized;
  vtkTransform *Transform;

  void ComputeTransformedSpacing (float Spacing[3]);
  void ComputeTransformedOrigin (float origin[3]);
  void ComputeTransformedExtent(int inExtent[6],
            int outExtent[6]);
  void ComputeTransformedIncrements(int inIncr[3],
                int outIncr[3]);

  int DataDimensions[3];
  float DataSpacing[3];
  float DataOrigin[3];
  int DataVOI[6];
  
  void ExecuteInformation();
  void Execute() { this->vtkImageSource::Execute(); };
  void Execute(vtkImageData *data);
  virtual void ComputeDataIncrements();
};

#endif

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