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

  Program:   Visualization Toolkit
  Module:    vtkDiscretizableColorTransferFunction.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 vtkDiscretizableColorTransferFunction_h
#define vtkDiscretizableColorTransferFunction_h

#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkColorTransferFunction.h"
#include "vtkSmartPointer.h" // for vtkSmartPointer

class vtkColorTransferFunction;
class vtkLookupTable;
class vtkPiecewiseFunction;

class VTKRENDERINGCORE_EXPORT vtkDiscretizableColorTransferFunction : public vtkColorTransferFunction
{
public:
  static vtkDiscretizableColorTransferFunction* New();
  vtkTypeMacro(vtkDiscretizableColorTransferFunction, vtkColorTransferFunction);
  void PrintSelf(ostream& os, vtkIndent indent);

  int IsOpaque();


  void SetIndexedColor(unsigned int index, const double rgb[3])
    { this->SetIndexedColor(index, rgb[0], rgb[1], rgb[2]); }
  void SetIndexedColor(unsigned int index, double r, double g, double b);

  virtual void GetIndexedColor(vtkIdType i, double rgba[4]);


  void SetNumberOfIndexedColors(unsigned int count);
  unsigned int GetNumberOfIndexedColors();

  virtual void Build();


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


  virtual void SetUseLogScale(int useLogScale);
  vtkGetMacro(UseLogScale, int);


  vtkSetMacro(NumberOfValues, vtkIdType);
  vtkGetMacro(NumberOfValues, vtkIdType);

  virtual unsigned char *MapValue(double v);

  virtual void GetColor(double v, double rgb[3]);

  virtual double GetOpacity(double v);


  virtual vtkUnsignedCharArray *MapScalars(vtkDataArray *scalars, int colorMode,
                                           int component);
  virtual vtkUnsignedCharArray *MapScalars(vtkAbstractArray *scalars, int colorMode,
                                           int component);

  VTK_LEGACY(double* GetRGBPoints());

  virtual void SetAlpha(double alpha);


  virtual void SetNanColor(double r, double g, double b);
  virtual void SetNanColor(double rgb[3]) {
    this->SetNanColor(rgb[0], rgb[1], rgb[2]);
  }


  virtual int UsingLogScale()
    { return this->UseLogScale; }

  virtual vtkIdType GetNumberOfAvailableColors();


  virtual void SetScalarOpacityFunction(vtkPiecewiseFunction *function);
  virtual vtkPiecewiseFunction* GetScalarOpacityFunction() const;


  vtkSetMacro(EnableOpacityMapping, bool)
  vtkGetMacro(EnableOpacityMapping, bool)
  vtkBooleanMacro(EnableOpacityMapping, bool)

  virtual unsigned long GetMTime();

protected:
  vtkDiscretizableColorTransferFunction();
  ~vtkDiscretizableColorTransferFunction();

  int Discretize;

  int UseLogScale;

  vtkIdType NumberOfValues;

  vtkLookupTable* LookupTable;

  vtkTimeStamp BuildTime;

  bool EnableOpacityMapping;
  vtkSmartPointer<vtkPiecewiseFunction> ScalarOpacityFunction;

  void MapDataArrayToOpacity(
    vtkDataArray *scalars, int component, vtkUnsignedCharArray* colors);

private:
  vtkDiscretizableColorTransferFunction(const vtkDiscretizableColorTransferFunction&); // Not implemented.
  void operator=(const vtkDiscretizableColorTransferFunction&); // Not implemented.

  template<typename T, typename VectorGetter>
    void MapVectorToOpacity (
      VectorGetter getter, T* scalars, int component,
      int numberOfComponents, vtkIdType numberOfTuples, unsigned char* colors);

  template<template<class> class VectorGetter>
    void AllTypesMapVectorToOpacity (
      int scalarType,
      void* scalarsPtr, int component,
      int numberOfComponents, vtkIdType numberOfTuples, unsigned char* colors);

  class vtkInternals;
  vtkInternals* Internals;
};

#endif