ImagePyramid.h

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include <vector>
 
#include "../system/FreestyleConfig.h"
 
#ifdef WITH_CXX_GUARDEDALLOC
#  include "MEM_guardedalloc.h"
#endif
 
namespace Freestyle {
 
class GrayImage;
 
class ImagePyramid {
 protected:
  std::vector<GrayImage *> _levels;
 
 public:
  ImagePyramid() {}
  ImagePyramid(const ImagePyramid &iBrother);
  // ImagePyramid(const GrayImage& level0, uint nbLevels);
  virtual ~ImagePyramid();
 
  virtual void BuildPyramid(const GrayImage &level0, uint nbLevels) = 0;
 
  virtual void BuildPyramid(GrayImage *level0, uint nbLevels) = 0;
 
  virtual GrayImage *getLevel(int l);
  virtual float pixel(int x, int y, int level = 0);
 
  virtual int width(int level = 0);
 
  virtual int height(int level = 0);
 
  inline int getNumberOfLevels() const
  {
    return _levels.size();
  }
 
#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:ImagePyramid")
#endif
};
 
class GaussianPyramid : public ImagePyramid {
 protected:
  float _sigma;
 
 public:
  GaussianPyramid(float iSigma = 1.0f) : ImagePyramid()
  {
    _sigma = iSigma;
  }
 
  GaussianPyramid(const GrayImage &level0, uint nbLevels, float iSigma = 1.0f);
  GaussianPyramid(GrayImage *level0, uint nbLevels, float iSigma = 1.0f);
  GaussianPyramid(const GaussianPyramid &iBrother);
  virtual ~GaussianPyramid() {}
 
  virtual void BuildPyramid(const GrayImage &level0, uint nbLevels);
  virtual void BuildPyramid(GrayImage *level0, uint nbLevels);
 
  /* accessors */
  inline float getSigma() const
  {
    return _sigma;
  }
 
  /* modifiers */
};
 
} /* namespace Freestyle */