BatchMapPainter.h

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#ifndef OSMSCOUT_MAP_BATCH_MAP_PAINTER_H
#define OSMSCOUT_MAP_BATCH_MAP_PAINTER_H
 
/*
  This source is part of the libosmscout-map library
  Copyright (C) 2023  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 <vector>
 
#include <osmscoutmap/MapImportExport.h>
 
#include <osmscout/projection/Projection.h>
 
#include <osmscoutmap/MapData.h>
#include <osmscoutmap/MapPainter.h>
#include <osmscoutmap/MapParameter.h>
 
namespace osmscout {

  template <class PainterType>
  class BatchMapPainter {
  protected:
    std::vector<MapDataRef> data;
    std::vector<PainterType> painters;
 
  protected:

    bool BatchPaintInternal(const Projection& projection,
                            const MapParameter& parameter)
    {
      bool success=true;
      for (auto step=static_cast<size_t>(osmscout::RenderSteps::FirstStep);
           step<=static_cast<size_t>(osmscout::RenderSteps::LastStep);
           ++step){
 
        for (size_t i=0;i<data.size(); ++i){
          const MapData &d=*(data[i]);
          auto renderStep=static_cast<RenderSteps>(step);
          if (!painters[i]->Draw(projection,
                                 parameter,
                                 d,
                                 renderStep,
                                 renderStep)) {
            success=false;
          }
        }
      }
      return success;
    }
 
  public:
    explicit BatchMapPainter(size_t expectedCount)
    {
      data.reserve(expectedCount);
      painters.reserve(expectedCount);
    }
 
    virtual ~BatchMapPainter() = default;
 
    void AddData(const MapDataRef &d, PainterType &painter)
    {
      data.push_back(d);
      painters.push_back(painter);
    }
  };

}
 
#endif