SceneHash.h

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include "IndexedFaceSet.h"
#include "NodeCamera.h"
#include "NodeViewLayer.h"
#include "SceneVisitor.h"
 
#include "BLI_sys_types.h"
 
#ifdef WITH_CXX_GUARDEDALLOC
#  include "MEM_guardedalloc.h"
#endif
 
namespace Freestyle {
 
class SceneHash : public SceneVisitor {
 public:
  inline SceneHash() : SceneVisitor()
  {
    _sum = 1;
  }
 
  virtual ~SceneHash() {}
 
  VISIT_DECL(NodeCamera);
  VISIT_DECL(NodeViewLayer);
  VISIT_DECL(IndexedFaceSet);
 
  string toString();
 
  inline bool match()
  {
    return _sum == _prevSum;
  }
 
  inline void store()
  {
    _prevSum = _sum;
  }
 
  inline void reset()
  {
    _sum = 1;
  }
 
 private:
  void adler32(const uchar *data, int size);
 
  uint32_t _sum;
  uint32_t _prevSum;
 
#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:SceneHash")
#endif
};
 
} /* namespace Freestyle */