#ifndef HELLO_FEATURESET_HPP #define HELLO_FEATURESET_HPP // mapnik #include <mapnik/datasource.hpp> // boost #include <boost/scoped_ptr.hpp> // needed for wrapping the transcoder // extend the mapnik::Featureset defined in include/mapnik/datasource.hpp class hello_featureset : public mapnik::Featureset { public: // this constructor can have any arguments you need hello_featureset(mapnik::box2d<double> const& box, std::string const& encoding); // desctructor virtual ~hello_featureset(); // mandatory: you must expose a next() method, called when rendering mapnik::feature_ptr next(); private: // members are up to you, but these are recommended mapnik::box2d<double> const& box_; mutable int feature_id_; boost::scoped_ptr<mapnik::transcoder> tr_; }; #endif // HELLO_FEATURESET_HPP