/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2015 Artem Pavlenko * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * *****************************************************************************/ #ifndef RASTERLITE_FEATURESET_HPP #define RASTERLITE_FEATURESET_HPP // mapnik #include <mapnik/feature.hpp> #include <mapnik/query.hpp> #include <mapnik/datasource.hpp> #include <mapnik/util/variant.hpp> #include "rasterlite_include.hpp" using rasterlite_query = mapnik::util::variant<mapnik::query,mapnik::coord2d>; class rasterlite_featureset : public mapnik::Featureset { struct query_dispatch { query_dispatch( rasterlite_featureset & featureset) : featureset_(featureset) {} mapnik::feature_ptr operator() (mapnik::query const& q) const { return featureset_.get_feature(q); } mapnik::feature_ptr operator() (mapnik::coord2d const& p) const { return featureset_.get_feature_at_point(p); } rasterlite_featureset & featureset_; }; public: rasterlite_featureset(void* dataset, rasterlite_query q); virtual ~rasterlite_featureset(); mapnik::feature_ptr next(); private: mapnik::feature_ptr get_feature(mapnik::query const& q); mapnik::feature_ptr get_feature_at_point(mapnik::coord2d const& p); void* dataset_; rasterlite_query gquery_; bool first_; mapnik::context_ptr ctx_; }; #endif // RASTERLITE_FEATURESET_HPP