CoverageIndex.h

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#ifndef OSMSCOUT_COVERAGEINDEX_H
#define OSMSCOUT_COVERAGEINDEX_H
 
/*
  This source is part of the libosmscout library
  Copyright (C) 2018  Tim Teulings
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library 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
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/
 
#include <memory>
#include <mutex>
#include <vector>
 
#include <osmscout/Pixel.h>
 
#include <osmscout/io/FileScanner.h>
 
namespace osmscout {

  class OSMSCOUT_API CoverageIndex
  {
  public:
    static const char* const COVERAGE_IDX;
 
  private:
    std::string           datafilename;   
    mutable FileScanner   scanner;        
 
    uint32_t              cellLevel;
    double                cellWidth;
    double                cellHeight;
    Pixel                 minCell;
    Pixel                 maxCell;
    uint32_t              width;
    uint32_t              height;
    std::vector<uint8_t>  bitmap;
 
  public:
    CoverageIndex() = default;
 
    void Close();
    bool Open(const std::string& path);
 
    inline bool IsOpen() const
    {
      return scanner.IsOpen();
    }
 
    Pixel GetTile(const GeoCoord& coord) const;
    bool IsCovered(const Pixel& tile) const;
 
    bool IsCovered(const GeoCoord& coord) const;
  };
 
  using CoverageIndexRef = std::shared_ptr<CoverageIndex>;
}
 
#endif