SymbolRenderer.h

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#ifndef OSMSCOUT_MAP_SYMBOLRENDERER_H
#define OSMSCOUT_MAP_SYMBOLRENDERER_H
 
/*
  This source is part of the libosmscout-map library
  Copyright (C) 2010  Tim Teulings
  Copyright (C) 2022  Lukas Karas
 
  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 <osmscoutmap/MapImportExport.h>
 
#include <osmscoutmap/Styles.h>
 
namespace osmscout {

class OSMSCOUT_MAP_API SymbolRenderer
{
public:
  virtual ~SymbolRenderer() = default;

  virtual void Render(const Projection &projection,
                      const Symbol &symbol,
                      const Vertex2D &mapCenter,
                      std::function<void()> afterRenderTransformer,
                      std::function<void()> afterEndTransformer,
                      double scaleFactor=1.0);

  virtual void Render(const Projection &projection,
                      const Symbol &symbol,
                      const Vertex2D &mapCenter,
                      double scaleFactor=1.0);
 
protected:
  virtual void SetFill(const FillStyleRef &fillStyle) = 0;
 
  virtual void SetBorder(const BorderStyleRef &borderStyle,
                         double screenMmInPixel) = 0;
 
  virtual void BeginPrimitive()
  {
    // Default implementation is empty
  };
 
  virtual void DrawPolygon(const std::vector<Vertex2D> &polygonPixels) = 0;
 
  virtual void DrawRect(double x,
                        double y,
                        double w,
                        double h) = 0;
 
  virtual void DrawCircle(double x,
                          double y,
                          double radius) = 0;
 
  virtual void EndPrimitive()
  {
    // Default implementation is empty
  };
};
}
 
#endif // OSMSCOUT_MAP_SYMBOLRENDERER_H