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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImageShiftScale.h,v $
  Language:  C++
  Date:      $Date: 2001/11/13 14:32:41 $
  Version:   $Revision: 1.39 $
  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 vtkImageShiftScale - shift and scale an input image
// .SECTION Description
// With vtkImageShiftScale Pixels are shifted and then scaled. As
// a convenience, this class allows you to set the output scalar type
// similar to vtkImageCast. This is because shift scale operations
// frequently convert data types.


#ifndef __vtkImageShiftScale_h
#define __vtkImageShiftScale_h


#include "vtkImageToImageFilter.h"

class VTK_IMAGING_EXPORT vtkImageShiftScale : public vtkImageToImageFilter
{
public:
  static vtkImageShiftScale *New();
  vtkTypeMacro(vtkImageShiftScale,vtkImageToImageFilter);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Set/Get the shift value.
  vtkSetMacro(Shift,float);
  vtkGetMacro(Shift,float);

  // Description:
  // Set/Get the scale value.
  vtkSetMacro(Scale,float);
  vtkGetMacro(Scale,float);

  // Description:
  // Set the desired output scalar type. The result of the shift 
  // and scale operations is cast to the type specified.
  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);}

  // Description:
  // When the ClampOverflow flag is on, the data is thresholded so that
  // the output value does not exceed the max or min of the data type.
  // By default, ClampOverflow is off.
  vtkSetMacro(ClampOverflow, int);
  vtkGetMacro(ClampOverflow, int);
  vtkBooleanMacro(ClampOverflow, int);
  
protected:
  vtkImageShiftScale();
  ~vtkImageShiftScale() {};

  float Shift;
  float Scale;
  int OutputScalarType;
  int ClampOverflow;
  
  void ExecuteInformation(vtkImageData *inData, vtkImageData *outData);
  void ExecuteInformation(){this->vtkImageToImageFilter::ExecuteInformation();};
  void ThreadedExecute(vtkImageData *inData, vtkImageData *outData,
                       int extent[6], int id);
private:
  vtkImageShiftScale(const vtkImageShiftScale&);  // Not implemented.
  void operator=(const vtkImageShiftScale&);  // Not implemented.
};

#endif