vtkImageBSplineInterpolator.h

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

  Program:   Visualization Toolkit
  Module:    vtkImageBSplineInterpolator.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 vtkImageBSplineInterpolator_h
#define vtkImageBSplineInterpolator_h

#include "vtkImagingCoreModule.h" // For export macro
#include "vtkAbstractImageInterpolator.h"

#define VTK_IMAGE_BSPLINE_DEGREE_MAX 9

class vtkImageData;
struct vtkInterpolationInfo;

class VTKIMAGINGCORE_EXPORT vtkImageBSplineInterpolator :
  public vtkAbstractImageInterpolator
{
public:
  static vtkImageBSplineInterpolator *New();
  vtkTypeMacro(vtkImageBSplineInterpolator, vtkAbstractImageInterpolator);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  void SetSplineDegree(int degree);
  int GetSplineDegree() { return this->SplineDegree; };
  int GetSplineDegreeMinValue() { return 0; }
  int GetSplineDegreeMaxValue() { return VTK_IMAGE_BSPLINE_DEGREE_MAX; }

  void ComputeSupportSize(const double matrix[16], int support[3]) override;

  bool IsSeparable() override;


  void PrecomputeWeightsForExtent(
    const double matrix[16], const int extent[6], int newExtent[6],
    vtkInterpolationWeights *&weights) override;
  void PrecomputeWeightsForExtent(
    const float matrix[16], const int extent[6], int newExtent[6],
    vtkInterpolationWeights *&weights) override;

  void FreePrecomputedWeights(vtkInterpolationWeights *&weights) override;

protected:
  vtkImageBSplineInterpolator();
  ~vtkImageBSplineInterpolator() override;

  void InternalUpdate() override;

  void InternalDeepCopy(vtkAbstractImageInterpolator *obj) override;


  void GetInterpolationFunc(
    void (**doublefunc)(
      vtkInterpolationInfo *, const double [3], double *)) override;
  void GetInterpolationFunc(
    void (**floatfunc)(
      vtkInterpolationInfo *, const float [3], float *)) override;


  void GetRowInterpolationFunc(
    void (**doublefunc)(
      vtkInterpolationWeights *, int, int, int, double *, int)) override;
  void GetRowInterpolationFunc(
    void (**floatfunc)(
      vtkInterpolationWeights *, int, int, int, float *, int)) override;

  virtual void BuildKernelLookupTable();

  virtual void FreeKernelLookupTable();

  int SplineDegree;
  float *KernelLookupTable;

private:
  vtkImageBSplineInterpolator(const vtkImageBSplineInterpolator&) = delete;
  void operator=(const vtkImageBSplineInterpolator&) = delete;
};

#endif