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70 lines
3.1 KiB
C++
70 lines
3.1 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) 2013 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_RENDERER_COMMON_PROCESS_POLYGON_SYMBOLIZER_HPP
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#define MAPNIK_RENDERER_COMMON_PROCESS_POLYGON_SYMBOLIZER_HPP
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namespace mapnik {
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template <typename vertex_converter_type, typename rasterizer_type, typename F>
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void render_polygon_symbolizer(polygon_symbolizer const &sym,
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mapnik::feature_impl &feature,
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proj_transform const &prj_trans,
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renderer_common &common,
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box2d<double> const &clip_box,
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rasterizer_type &ras,
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F fill_func)
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{
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agg::trans_affine tr;
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auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
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if (transform) evaluate_transform(tr, feature, common.vars_, *transform, common.scale_factor_);
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bool clip = get<value_bool>(sym, keys::clip, feature, common.vars_, false);
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double simplify_tolerance = get<double>(sym, keys::simplify_tolerance, feature, common.vars_, 0.0);
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double smooth = get<value_double>(sym, keys::smooth, feature, common.vars_, 0.0);
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double opacity = get<value_double>(sym,keys::fill_opacity,feature,common.vars_, 1.0);
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vertex_converter_type converter(clip_box, ras, sym, common.t_, prj_trans, tr,
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feature,common.vars_,common.scale_factor_);
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if (prj_trans.equal() && clip) converter.template set<clip_poly_tag>(); //optional clip (default: true)
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converter.template set<transform_tag>(); //always transform
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converter.template set<affine_transform_tag>();
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if (simplify_tolerance > 0.0) converter.template set<simplify_tag>(); // optional simplify converter
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if (smooth > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
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for (geometry_type & geom : feature.paths())
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{
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if (geom.size() > 2)
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{
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converter.apply(geom);
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}
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}
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color const& fill = get<mapnik::color>(sym, keys::fill, feature, common.vars_, mapnik::color(128,128,128)); // gray
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fill_func(fill, opacity);
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}
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} // namespace mapnik
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#endif /* MAPNIK_RENDERER_COMMON_PROCESS_POLYGON_SYMBOLIZER_HPP */
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