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

  Program:   Visualization Toolkit
  Module:    vtkImageSincInterpolator.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 vtkImageSincInterpolator_h
#define vtkImageSincInterpolator_h

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

#define VTK_LANCZOS_WINDOW 0
#define VTK_KAISER_WINDOW  1
#define VTK_COSINE_WINDOW  2
#define VTK_HANN_WINDOW    3
#define VTK_HAMMING_WINDOW 4
#define VTK_BLACKMAN_WINDOW 5
#define VTK_BLACKMAN_HARRIS3 6
#define VTK_BLACKMAN_HARRIS4 7
#define VTK_NUTTALL_WINDOW 8
#define VTK_BLACKMAN_NUTTALL3 9
#define VTK_BLACKMAN_NUTTALL4 10
#define VTK_SINC_KERNEL_SIZE_MAX 32

class vtkImageData;
struct vtkInterpolationInfo;

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


  virtual void SetWindowFunction(int mode);
  void SetWindowFunctionToLanczos() {
    this->SetWindowFunction(VTK_LANCZOS_WINDOW); }
  void SetWindowFunctionToKaiser() {
    this->SetWindowFunction(VTK_KAISER_WINDOW); }
  void SetWindowFunctionToCosine() {
    this->SetWindowFunction(VTK_COSINE_WINDOW); }
  void SetWindowFunctionToHann() {
    this->SetWindowFunction(VTK_HANN_WINDOW); }
  void SetWindowFunctionToHamming() {
    this->SetWindowFunction(VTK_HAMMING_WINDOW); }
  void SetWindowFunctionToBlackman() {
    this->SetWindowFunction(VTK_BLACKMAN_WINDOW); }
  void SetWindowFunctionToBlackmanHarris3() {
    this->SetWindowFunction(VTK_BLACKMAN_HARRIS3); }
  void SetWindowFunctionToBlackmanHarris4() {
    this->SetWindowFunction(VTK_BLACKMAN_HARRIS4); }
  void SetWindowFunctionToNuttall() {
    this->SetWindowFunction(VTK_NUTTALL_WINDOW); }
  void SetWindowFunctionToBlackmanNuttall3() {
    this->SetWindowFunction(VTK_BLACKMAN_NUTTALL3); }
  void SetWindowFunctionToBlackmanNuttall4() {
    this->SetWindowFunction(VTK_BLACKMAN_NUTTALL4); }
  int GetWindowFunction() { return this->WindowFunction; }
  virtual const char *GetWindowFunctionAsString();


  void SetWindowHalfWidth(int n);
  int GetWindowHalfWidth() { return this->WindowHalfWidth; }


  void SetUseWindowParameter(int val);
  void UseWindowParameterOn() { this->SetUseWindowParameter(1); }
  void UseWindowParameterOff() { this->SetUseWindowParameter(0); }
  int GetUseWindowParameter() { return this->UseWindowParameter; }


  void SetWindowParameter(double parm);
  double GetWindowParameter() { return this->WindowParameter; }

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


  void SetBlurFactors(double x, double y, double z);
  void SetBlurFactors(const double f[3]) {
    this->SetBlurFactors(f[0], f[1], f[2]); }
  void GetBlurFactors(double f[3]) {
    f[0] = this->BlurFactors[0];
    f[1] = this->BlurFactors[1];
    f[2] = this->BlurFactors[2]; }
  double *GetBlurFactors() { return this->BlurFactors; }


  void SetAntialiasing(int antialiasing);
  void AntialiasingOn() { this->SetAntialiasing(1); }
  void AntialiasingOff() { this->SetAntialiasing(0); }
  int GetAntialiasing() { return this->Antialiasing; }


  void SetRenormalization(int renormalization);
  void RenormalizationOn() { this->SetRenormalization(1); }
  void RenormalizationOff() { this->SetRenormalization(0); }
  int GetRenormalization() { return this->Renormalization; }

  virtual bool IsSeparable();


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

  virtual void FreePrecomputedWeights(vtkInterpolationWeights *&weights);

protected:
  vtkImageSincInterpolator();
  ~vtkImageSincInterpolator();

  virtual void InternalUpdate();

  virtual void InternalDeepCopy(vtkAbstractImageInterpolator *obj);


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


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

  virtual void BuildKernelLookupTable();

  virtual void FreeKernelLookupTable();

  int WindowFunction;
  int WindowHalfWidth;
  float *KernelLookupTable[3];
  int KernelSize[3];
  int Antialiasing;
  int Renormalization;
  double BlurFactors[3];
  double LastBlurFactors[3];
  double WindowParameter;
  int UseWindowParameter;

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

#endif