vtkImageBSplineInternals.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkImageBSplineInternals_h
#define vtkImageBSplineInternals_h

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

VTK_ABI_NAMESPACE_BEGIN
class VTKIMAGINGCORE_EXPORT vtkImageBSplineInternals
{
public:
  static int GetPoleValues(double poles[4], long& numPoles, long degree);

  static void ConvertToInterpolationCoefficients(double data[], long size,
    vtkImageBorderMode border, double poles[4], long numPoles, double tol) VTK_SIZEHINT(data, size);


  static int GetInterpolationWeights(double weights[10], double w, long degree);
  static int GetInterpolationWeights(float weights[10], double w, long degree);


  static int InterpolatedValue(const double* coeffs, double* value, long width, long height,
    long slices, long depth, double x, double y, double z, long degree, vtkImageBorderMode border);
  static int InterpolatedValue(const float* coeffs, float* value, long width, long height,
    long slices, long depth, double x, double y, double z, long degree, vtkImageBorderMode border);

protected:
  static double InitialCausalCoefficient(
    double data[], long size, vtkImageBorderMode border, double pole, double tol);

  static double InitialAntiCausalCoefficient(
    double data[], long size, vtkImageBorderMode border, double pole, double tol);
};

VTK_ABI_NAMESPACE_END
#endif
// VTK-HeaderTest-Exclude: vtkImageBSplineInternals.h