/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2011 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 * ***************************************************************************** * * Initially developed by Sandro Santilli <strk@keybit.net> for CartoDB * *****************************************************************************/ #ifndef PGRASTER_FEATURESET_HPP #define PGRASTER_FEATURESET_HPP // mapnik #include <mapnik/box2d.hpp> #include <mapnik/datasource.hpp> #include <mapnik/feature.hpp> #include <mapnik/unicode.hpp> // stl #include <memory> using mapnik::Featureset; using mapnik::box2d; using mapnik::feature_ptr; using mapnik::raster_ptr; using mapnik::transcoder; using mapnik::context_ptr; class IResultSet; class pgraster_featureset : public mapnik::Featureset { public: /// @param bandno band number (1-based). 0 (default) reads all bands. /// Anything else forces interpretation of colors off /// (values copied verbatim) pgraster_featureset(std::shared_ptr<IResultSet> const& rs, context_ptr const& ctx, std::string const& encoding, bool key_field = false, int bandno = 0); feature_ptr next(); ~pgraster_featureset(); private: std::shared_ptr<IResultSet> rs_; context_ptr ctx_; const std::unique_ptr<mapnik::transcoder> tr_; mapnik::value_integer feature_id_; bool key_field_; int band_; }; #endif // PGRASTER_FEATURESET_HPP