95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_FEATURE_STYLE_PROCESSOR_HPP
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#define MAPNIK_FEATURE_STYLE_PROCESSOR_HPP
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// mapnik
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#include <mapnik/map.hpp>
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#include <mapnik/projection.hpp>
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#include <mapnik/memory_datasource.hpp>
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// stl
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#include <set>
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#include <string>
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#include <vector>
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namespace mapnik
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{
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class Map;
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class layer;
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class projection;
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template <typename Processor>
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class feature_style_processor
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{
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struct symbol_dispatch;
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public:
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explicit feature_style_processor(Map const& m, double scale_factor = 1.0);
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/*!
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* @return apply renderer to all map layers.
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*/
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void apply();
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/*!
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* @return apply renderer to a single layer, providing pre-populated set of query attribute names.
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*/
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void apply(mapnik::layer const& lyr, std::set<std::string>& names);
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private:
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/*!
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* @return initialize metawriters for a given map and projection.
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*/
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void start_metawriters(Map const& m_, projection const& proj);
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/*!
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* @return stop metawriters that were previously initialized.
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*/
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void stop_metawriters(Map const& m_);
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/*!
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* @return render a layer given a projection and scale.
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*/
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void apply_to_layer(layer const& lay,
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Processor & p,
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projection const& proj0,
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double scale_denom,
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std::set<std::string>& names);
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/*!
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* @return renders a featureset with the given styles.
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*/
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void render_style(layer const& lay,
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Processor & p,
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feature_type_style* style,
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std::string const& style_name,
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featureset_ptr features,
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proj_transform const& prj_trans,
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double scale_denom);
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Map const& m_;
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double scale_factor_;
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};
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}
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#endif // MAPNIK_FEATURE_STYLE_PROCESSOR_HPP
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