---

Common/vtkWindowLevelLookupTable.h

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

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

  Copyright (c) 1993-2002 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 __vtkWindowLevelLookupTable_h
#define __vtkWindowLevelLookupTable_h

#include "vtkLookupTable.h"

class VTK_COMMON_EXPORT vtkWindowLevelLookupTable : public vtkLookupTable
{
public:
  static vtkWindowLevelLookupTable *New();
  vtkTypeRevisionMacro(vtkWindowLevelLookupTable,vtkLookupTable);
  void PrintSelf(ostream& os, vtkIndent indent);

  void Build();


  void SetWindow(float window) {
    if (window < 1e-5f) { window = 1e-5f; }
    this->Window = window;
    this->SetTableRange(this->Level - this->Window/2.0f,
                        this->Level + this->Window/2.0f); };
  vtkGetMacro(Window,float);


  void SetLevel(float level) {
    this->Level = level;
    this->SetTableRange(this->Level - this->Window/2.0f,
                        this->Level + this->Window/2.0f); };
  vtkGetMacro(Level,float);


  void SetInverseVideo(int iv);
  vtkGetMacro(InverseVideo,int);
  vtkBooleanMacro(InverseVideo,int);


  vtkSetVector4Macro(MinimumTableValue,float);
  vtkGetVector4Macro(MinimumTableValue,float);


  vtkSetVector4Macro(MaximumTableValue,float);
  vtkGetVector4Macro(MaximumTableValue,float);


  void SetMinimumColor(int r, int g, int b, int a) {
    this->SetMinimumTableValue(r*255.0f,g*255.0f,b*255.0f,a*255.0f); };
  void SetMinimumColor(const unsigned char rgba[4]) {
    this->SetMinimumColor(rgba[0],rgba[1],rgba[2],rgba[3]); };
  void GetMinimumColor(unsigned char rgba[4]) {
    rgba[0] = int(this->MinimumColor[0]*255);
    rgba[1] = int(this->MinimumColor[1]*255);
    rgba[2] = int(this->MinimumColor[2]*255);
    rgba[3] = int(this->MinimumColor[3]*255); };
  unsigned char *GetMinimumColor() {
    this->GetMinimumColor(this->MinimumColor); 
    return this->MinimumColor; };


  void SetMaximumColor(int r, int g, int b, int a) {
    this->SetMaximumTableValue(r*255.0f,g*255.0f,b*255.0f,a*255.0f); };
  void SetMaximumColor(const unsigned char rgba[4]) {
    this->SetMaximumColor(rgba[0],rgba[1],rgba[2],rgba[3]); };
  void GetMaximumColor(unsigned char rgba[4]) {
    rgba[0] = int(this->MaximumColor[0]*255);
    rgba[1] = int(this->MaximumColor[1]*255);
    rgba[2] = int(this->MaximumColor[2]*255);
    rgba[3] = int(this->MaximumColor[3]*255); };
  unsigned char *GetMaximumColor() {
    this->GetMaximumColor(this->MaximumColor); 
    return this->MaximumColor; };

protected:
  vtkWindowLevelLookupTable(int sze=256, int ext=256);
  ~vtkWindowLevelLookupTable() {};

  float Window;
  float Level;
  int InverseVideo;
  float MaximumTableValue[4];
  float MinimumTableValue[4];
  unsigned char MinimumColor[4];
  unsigned char MaximumColor[4];
private:
  vtkWindowLevelLookupTable(const vtkWindowLevelLookupTable&);  // Not implemented.
  void operator=(const vtkWindowLevelLookupTable&);  // Not implemented.
};

#endif

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