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

  Program:   Visualization Toolkit
  Module:    vtkImageThreshold.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$
  Thanks:    Thanks to C. Charles Law who developed this class.

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.

=========================================================================*/
// .NAME vtkImageThreshold -  Flexible threshold
// .SECTION Description
// vtkImageThreshold Can do binary or continuous thresholding for lower, upper
// or a range of data.  The output data type may be different than the
// output, but defaults to the same type.


#ifndef __vtkImageThreshold_h
#define __vtkImageThreshold_h


#include "vtkImageToImageFilter.h"

class VTK_EXPORT vtkImageThreshold : public vtkImageToImageFilter
{
public:
  static vtkImageThreshold *New();
  vtkTypeMacro(vtkImageThreshold,vtkImageToImageFilter);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  // Description:
  // The values greater than or equal to the value match.
  void ThresholdByUpper(float thresh);
  
  // Description:
  // The values less than or equal to the value match.
  void ThresholdByLower(float thresh);
  
  // Description:
  // The values in a range (inclusive) match
  void ThresholdBetween(float lower, float upper);
  
  // Description:
  // Determines whether to replace the pixel in range with InValue
  vtkSetMacro(ReplaceIn, int);
  vtkGetMacro(ReplaceIn, int);
  vtkBooleanMacro(ReplaceIn, int);
  
  // Description:
  // Replace the in range pixels with this value.
  void SetInValue(float val);
  vtkGetMacro(InValue, float);
  
  // Description:
  // Determines whether to replace the pixel out of range with OutValue
  vtkSetMacro(ReplaceOut, int);
  vtkGetMacro(ReplaceOut, int);
  vtkBooleanMacro(ReplaceOut, int);

  // Description:
  // Replace the in range pixels with this value.
  void SetOutValue(float val);
  vtkGetMacro(OutValue, float);
  
  // Description:
  // Get the Upper and Lower thresholds.
  vtkGetMacro(UpperThreshold, float);
  vtkGetMacro(LowerThreshold, float);
  
  // Description:
  // Set the desired output scalar type to cast to
  vtkSetMacro(OutputScalarType, int);
  vtkGetMacro(OutputScalarType, int);
  void SetOutputScalarTypeToDouble()
    {this->SetOutputScalarType(VTK_DOUBLE);}
  void SetOutputScalarTypeToFloat()
    {this->SetOutputScalarType(VTK_FLOAT);}
  void SetOutputScalarTypeToLong()
    {this->SetOutputScalarType(VTK_LONG);}
  void SetOutputScalarTypeToUnsignedLong()
    {this->SetOutputScalarType(VTK_UNSIGNED_LONG);};
  void SetOutputScalarTypeToInt()
    {this->SetOutputScalarType(VTK_INT);}
  void SetOutputScalarTypeToUnsignedInt()
    {this->SetOutputScalarType(VTK_UNSIGNED_INT);}
  void SetOutputScalarTypeToShort()
    {this->SetOutputScalarType(VTK_SHORT);}
  void SetOutputScalarTypeToUnsignedShort()
    {this->SetOutputScalarType(VTK_UNSIGNED_SHORT);}
  void SetOutputScalarTypeToChar()
    {this->SetOutputScalarType(VTK_CHAR);}
  void SetOutputScalarTypeToUnsignedChar()
    {this->SetOutputScalarType(VTK_UNSIGNED_CHAR);}
  
protected:
  vtkImageThreshold();
  ~vtkImageThreshold() {};
  vtkImageThreshold(const vtkImageThreshold&) {};
  void operator=(const vtkImageThreshold&) {};

  float UpperThreshold;
  float LowerThreshold;
  int ReplaceIn;
  float InValue;
  int ReplaceOut;
  float OutValue;
  
  int OutputScalarType;

  void ExecuteInformation(vtkImageData *inData, vtkImageData *outData);
  void ExecuteInformation(){this->vtkImageToImageFilter::ExecuteInformation();};
  void ThreadedExecute(vtkImageData *inData, vtkImageData *outData, 
		       int extent[6], int id);
};

#endif



