SceneHash.h

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
 
#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 unsigned char *data, int size);
 
  uint32_t _sum;
  uint32_t _prevSum;
 
#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:SceneHash")
#endif
};
 
} /* namespace Freestyle */