vtkDiscretizableColorTransferFunction.h

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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 "vtkColorTransferFunction.h"
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkSmartPointer.h"        // for vtkSmartPointer
 
class vtkColorTransferFunction;
class vtkLookupTable;
class vtkPiecewiseFunction;
class vtkUnsignedCharArray;
 
class VTKRENDERINGCORE_EXPORT vtkDiscretizableColorTransferFunction
  : public vtkColorTransferFunction
{
public:
  static vtkDiscretizableColorTransferFunction* New();
  vtkTypeMacro(vtkDiscretizableColorTransferFunction, vtkColorTransferFunction);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  int IsOpaque() override;
  int IsOpaque(vtkAbstractArray* scalars, int colorMode, int component) override;
  int IsOpaque(vtkAbstractArray* scalars, int colorMode, int component,
    vtkUnsignedCharArray* ghosts, unsigned char ghostsToSkip = 0xff) override;
 
  void SetIndexedColorRGB(unsigned int index, const double rgb[3])
  {
    this->SetIndexedColor(index, rgb[0], rgb[1], rgb[2]);
  }
  void SetIndexedColorRGBA(unsigned int index, const double rgba[4])
  {
    this->SetIndexedColor(index, rgba[0], rgba[1], rgba[2], rgba[3]);
  }
  void SetIndexedColor(unsigned int index, double r, double g, double b, double a = 1.0);
 
  void GetIndexedColor(vtkIdType i, double rgba[4]) override;
 
 
  void SetNumberOfIndexedColors(unsigned int count);
  unsigned int GetNumberOfIndexedColors();
 
  void Build() override;
 
 
  vtkSetMacro(Discretize, vtkTypeBool);
  vtkGetMacro(Discretize, vtkTypeBool);
  vtkBooleanMacro(Discretize, vtkTypeBool);
 
 
  virtual void SetUseLogScale(int useLogScale);
  vtkGetMacro(UseLogScale, int);
 
 
  vtkSetMacro(NumberOfValues, vtkIdType);
  vtkGetMacro(NumberOfValues, vtkIdType);
 
  const unsigned char* MapValue(double v) override;
 
  void GetColor(double v, double rgb[3]) override;
 
  double GetOpacity(double v) override;
 
  void MapScalarsThroughTable2(void* input, unsigned char* output, int inputDataType,
    int numberOfValues, int inputIncrement, int outputFormat) override;
 
  void SetAlpha(double alpha) override;
 
 
  void SetNanColor(double r, double g, double b) override;
  void SetNanColor(const double rgb[3]) override { this->SetNanColor(rgb[0], rgb[1], rgb[2]); }
 
  void SetNanOpacity(double a) override;
 
  int UsingLogScale() override { return this->UseLogScale; }
 
  vtkIdType GetNumberOfAvailableColors() override;
 
 
  virtual void SetScalarOpacityFunction(vtkPiecewiseFunction* function);
  virtual vtkPiecewiseFunction* GetScalarOpacityFunction() const;
 
 
  vtkSetMacro(EnableOpacityMapping, bool);
  vtkGetMacro(EnableOpacityMapping, bool);
  vtkBooleanMacro(EnableOpacityMapping, bool);
 
  vtkMTimeType GetMTime() override;
 
protected:
  vtkDiscretizableColorTransferFunction();
  ~vtkDiscretizableColorTransferFunction() override;
 
  vtkTypeBool Discretize;
 
  int UseLogScale;
 
  vtkIdType NumberOfValues;
 
  vtkLookupTable* LookupTable;
 
  vtkTimeStamp LookupTableUpdateTime;
 
  bool EnableOpacityMapping;
  vtkSmartPointer<vtkPiecewiseFunction> ScalarOpacityFunction;
 
  void MapDataArrayToOpacity(vtkDataArray* scalars, int component, vtkUnsignedCharArray* colors);
 
private:
  vtkDiscretizableColorTransferFunction(const vtkDiscretizableColorTransferFunction&) = delete;
  void operator=(const vtkDiscretizableColorTransferFunction&) = delete;
 
  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