vtkLookupTable.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkLookupTable_h
#define vtkLookupTable_h
 
#include "vtkCommonCoreModule.h" // For export macro
#include "vtkScalarsToColors.h"
#include "vtkWrappingHints.h" // For VTK_MARSHALAUTO
 
#include "vtkUnsignedCharArray.h" // Needed for inline method
 
#define VTK_RAMP_LINEAR 0
#define VTK_RAMP_SCURVE 1
#define VTK_RAMP_SQRT 2
#define VTK_SCALE_LINEAR 0
#define VTK_SCALE_LOG10 1
 
VTK_ABI_NAMESPACE_BEGIN
class VTKCOMMONCORE_EXPORT VTK_MARSHALAUTO vtkLookupTable : public vtkScalarsToColors
{
public:

  static const vtkIdType REPEATED_LAST_COLOR_INDEX;
  static const vtkIdType BELOW_RANGE_COLOR_INDEX;
  static const vtkIdType ABOVE_RANGE_COLOR_INDEX;
  static const vtkIdType NAN_COLOR_INDEX;
  static const vtkIdType NUMBER_OF_SPECIAL_COLORS;

  static vtkLookupTable* New();
 
  vtkTypeMacro(vtkLookupTable, vtkScalarsToColors);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkTypeBool IsOpaque() override;
  vtkTypeBool IsOpaque(vtkAbstractArray* scalars, int colorMode, int component) override;
  vtkTypeBool IsOpaque(vtkAbstractArray* scalars, int colorMode, int component,
    vtkUnsignedCharArray* ghosts, unsigned char ghostsToSkip = 0xff) override;

  int Allocate(int sz = 256, int ext = 256);

  void Build() override;

  virtual void ForceBuild();

  void BuildSpecialColors();


  vtkSetMacro(Ramp, int);
  void SetRampToLinear() { this->SetRamp(VTK_RAMP_LINEAR); }
  void SetRampToSCurve() { this->SetRamp(VTK_RAMP_SCURVE); }
  void SetRampToSQRT() { this->SetRamp(VTK_RAMP_SQRT); }
  vtkGetMacro(Ramp, int);


  void SetScale(int scale);
  void SetScaleToLinear() { this->SetScale(VTK_SCALE_LINEAR); }
  void SetScaleToLog10() { this->SetScale(VTK_SCALE_LOG10); }
  vtkGetMacro(Scale, int);


  virtual void SetTableRange(const double r[2]);
  virtual void SetTableRange(double min, double max);
  vtkGetVectorMacro(TableRange, double, 2);


  vtkSetVector2Macro(HueRange, double);
  vtkGetVector2Macro(HueRange, double);


  vtkSetVector2Macro(SaturationRange, double);
  vtkGetVector2Macro(SaturationRange, double);


  vtkSetVector2Macro(ValueRange, double);
  vtkGetVector2Macro(ValueRange, double);


  vtkSetVector2Macro(AlphaRange, double);
  vtkGetVector2Macro(AlphaRange, double);


  vtkSetVector4Macro(NanColor, double);
  vtkGetVector4Macro(NanColor, double);

  unsigned char* GetNanColorAsUnsignedChars();

  static void GetColorAsUnsignedChars(const double colorIn[4], unsigned char colorOut[4]);


  vtkSetVector4Macro(BelowRangeColor, double);
  vtkGetVector4Macro(BelowRangeColor, double);


  vtkSetMacro(UseBelowRangeColor, vtkTypeBool);
  vtkGetMacro(UseBelowRangeColor, vtkTypeBool);
  vtkBooleanMacro(UseBelowRangeColor, vtkTypeBool);


  vtkSetVector4Macro(AboveRangeColor, double);
  vtkGetVector4Macro(AboveRangeColor, double);


  vtkSetMacro(UseAboveRangeColor, vtkTypeBool);
  vtkGetMacro(UseAboveRangeColor, vtkTypeBool);
  vtkBooleanMacro(UseAboveRangeColor, vtkTypeBool);

  const unsigned char* MapValue(double v) override;

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

  double GetOpacity(double v) override;

  virtual vtkIdType GetIndex(double v);


  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_REDUNDANT)
  void SetNumberOfTableValues(vtkIdType number);
  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_REDUNDANT)
  vtkIdType GetNumberOfTableValues() { return this->NumberOfColors; }

  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_REDUNDANT)
  virtual void SetTableValue(vtkIdType index, const double rgba[4]);

  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_REDUNDANT)
  virtual void SetTableValue(vtkIdType index, double r, double g, double b, double a = 1.0);

  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_REDUNDANT)
  double* GetTableValue(vtkIdType index) VTK_SIZEHINT(4);

  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_REDUNDANT)
  void GetTableValue(vtkIdType index, double rgba[4]);

  unsigned char* GetPointer(vtkIdType id) { return this->Table->GetPointer(4 * id); }

  unsigned char* WritePointer(vtkIdType id, int number);


  double* GetRange() VTK_SIZEHINT(2) override { return this->GetTableRange(); }
  void SetRange(double min, double max) override { this->SetTableRange(min, max); }
  void SetRange(const double rng[2]) override { this->SetRange(rng[0], rng[1]); }

  static void GetLogRange(const double range[2], double log_range[2]);

  static double ApplyLogScale(double v, const double range[2], const double log_range[2]);


  vtkSetClampMacro(NumberOfColors, vtkIdType, 2, VTK_ID_MAX);
  vtkGetMacro(NumberOfColors, vtkIdType);


  void SetTable(vtkUnsignedCharArray*);
  vtkGetObjectMacro(Table, vtkUnsignedCharArray);


  void MapScalarsThroughTable(vtkAbstractArray* input, unsigned char* output, int numberOfTuples,
    int numberOfComponents, int vectorComponent, int outputFormat) override;
  using vtkScalarsToColors::MapScalarsThroughTable;

  void DeepCopy(vtkScalarsToColors* obj) override;

  vtkTypeBool UsingLogScale() override { return (this->GetScale() == VTK_SCALE_LOG10) ? 1 : 0; }

  vtkIdType GetNumberOfAvailableColors() override;

  void GetIndexedColor(vtkIdType idx, double rgba[4]) override;
 
protected:
  vtkLookupTable(int sze = 256, int ext = 256);
  ~vtkLookupTable() override;
 
  vtkIdType NumberOfColors;
  vtkUnsignedCharArray* Table;
  double TableRange[2];
  double HueRange[2];
  double SaturationRange[2];
  double ValueRange[2];
  double AlphaRange[2];
  double NanColor[4];
  double BelowRangeColor[4];
  vtkTypeBool UseBelowRangeColor;
  double AboveRangeColor[4];
  vtkTypeBool UseAboveRangeColor;
 
  int Scale;
  int Ramp;
  vtkTimeStamp InsertTime;
  vtkTimeStamp BuildTime;
  double RGBA[4]; // used during conversion process
  unsigned char NanColorChar[4];
 
  vtkTypeBool OpaqueFlag;
  vtkTimeStamp OpaqueFlagBuildTime;
  vtkTimeStamp SpecialColorsBuildTime;

  void ResizeTableForSpecialColors();
 
private:
  vtkLookupTable(const vtkLookupTable&) = delete;
  void operator=(const vtkLookupTable&) = delete;
};
 
//----------------------------------------------------------------------------
inline unsigned char* vtkLookupTable::WritePointer(vtkIdType id, int number)
{
  this->InsertTime.Modified();
  return this->Table->WritePointer(4 * id, 4 * number);
}
 
VTK_ABI_NAMESPACE_END
#endif