337 lines
12 KiB
C++
337 lines
12 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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#include <mapnik/map.hpp>
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#include <mapnik/layer.hpp>
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#include <mapnik/rule.hpp>
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#include <mapnik/line_symbolizer.hpp>
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#include <mapnik/polygon_symbolizer.hpp>
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#include <mapnik/text_symbolizer.hpp>
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#include <mapnik/feature_type_style.hpp>
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#include <mapnik/graphics.hpp>
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#include <mapnik/datasource_cache.hpp>
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#include <mapnik/font_engine_freetype.hpp>
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#include <mapnik/agg_renderer.hpp>
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#include <mapnik/expression.hpp>
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#include <mapnik/color_factory.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/config_error.hpp>
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#if defined(HAVE_CAIRO)
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#include <mapnik/cairo_renderer.hpp>
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#include <mapnik/cairo_context.hpp>
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#endif
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#include <iostream>
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int main ( int argc , char** argv)
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{
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if (argc != 2)
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{
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std::cout << "usage: ./rundemo <mapnik_install_dir>\nUsually /usr/local\n";
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std::cout << "Warning: ./rundemo looks for data in ../data/,\nTherefore must be run from within the demo/c++ folder.\n";
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return EXIT_SUCCESS;
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}
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using namespace mapnik;
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const std::string srs_lcc="+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 \
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+datum=NAD83 +units=m +no_defs";
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const std::string srs_merc="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 \
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+y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over";
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try {
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std::cout << " running demo ... \n";
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std::string mapnik_dir(argv[1]);
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std::cout << " looking for 'shape.input' plugin in... " << mapnik_dir << "/lib/mapnik/input/" << "\n";
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datasource_cache::instance().register_datasources(mapnik_dir + "/lib/mapnik/input/");
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std::cout << " looking for DejaVuSans font in... " << mapnik_dir << "/lib/mapnik/fonts/DejaVuSans.ttf" << "\n";
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freetype_engine::register_font(mapnik_dir + "/lib/mapnik/fonts/DejaVuSans.ttf");
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Map m(800,600);
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m.set_background(parse_color("white"));
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m.set_srs(srs_merc);
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// create styles
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// Provinces (polygon)
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feature_type_style provpoly_style;
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rule provpoly_rule_on;
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provpoly_rule_on.set_filter(parse_expression("[NAME_EN] = 'Ontario'"));
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provpoly_rule_on.append(polygon_symbolizer(color(250, 190, 183)));
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provpoly_style.add_rule(provpoly_rule_on);
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rule provpoly_rule_qc;
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provpoly_rule_qc.set_filter(parse_expression("[NOM_FR] = 'Québec'"));
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provpoly_rule_qc.append(polygon_symbolizer(color(217, 235, 203)));
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provpoly_style.add_rule(provpoly_rule_qc);
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m.insert_style("provinces",provpoly_style);
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// Provinces (polyline)
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feature_type_style provlines_style;
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stroke provlines_stk (color(0,0,0),1.0);
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provlines_stk.add_dash(8, 4);
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provlines_stk.add_dash(2, 2);
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provlines_stk.add_dash(2, 2);
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rule provlines_rule;
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provlines_rule.append(line_symbolizer(provlines_stk));
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provlines_style.add_rule(provlines_rule);
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m.insert_style("provlines",provlines_style);
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// Drainage
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feature_type_style qcdrain_style;
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rule qcdrain_rule;
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qcdrain_rule.set_filter(parse_expression("[HYC] = 8"));
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qcdrain_rule.append(polygon_symbolizer(color(153, 204, 255)));
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qcdrain_style.add_rule(qcdrain_rule);
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m.insert_style("drainage",qcdrain_style);
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// Roads 3 and 4 (The "grey" roads)
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feature_type_style roads34_style;
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rule roads34_rule;
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roads34_rule.set_filter(parse_expression("[CLASS] = 3 or [CLASS] = 4"));
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stroke roads34_rule_stk(color(171,158,137),2.0);
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roads34_rule_stk.set_line_cap(ROUND_CAP);
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roads34_rule_stk.set_line_join(ROUND_JOIN);
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roads34_rule.append(line_symbolizer(roads34_rule_stk));
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roads34_style.add_rule(roads34_rule);
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m.insert_style("smallroads",roads34_style);
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// Roads 2 (The thin yellow ones)
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feature_type_style roads2_style_1;
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rule roads2_rule_1;
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roads2_rule_1.set_filter(parse_expression("[CLASS] = 2"));
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stroke roads2_rule_stk_1(color(171,158,137),4.0);
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roads2_rule_stk_1.set_line_cap(ROUND_CAP);
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roads2_rule_stk_1.set_line_join(ROUND_JOIN);
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roads2_rule_1.append(line_symbolizer(roads2_rule_stk_1));
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roads2_style_1.add_rule(roads2_rule_1);
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m.insert_style("road-border", roads2_style_1);
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feature_type_style roads2_style_2;
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rule roads2_rule_2;
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roads2_rule_2.set_filter(parse_expression("[CLASS] = 2"));
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stroke roads2_rule_stk_2(color(255,250,115),2.0);
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roads2_rule_stk_2.set_line_cap(ROUND_CAP);
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roads2_rule_stk_2.set_line_join(ROUND_JOIN);
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roads2_rule_2.append(line_symbolizer(roads2_rule_stk_2));
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roads2_style_2.add_rule(roads2_rule_2);
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m.insert_style("road-fill", roads2_style_2);
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// Roads 1 (The big orange ones, the highways)
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feature_type_style roads1_style_1;
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rule roads1_rule_1;
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roads1_rule_1.set_filter(parse_expression("[CLASS] = 1"));
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stroke roads1_rule_stk_1(color(188,149,28),7.0);
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roads1_rule_stk_1.set_line_cap(ROUND_CAP);
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roads1_rule_stk_1.set_line_join(ROUND_JOIN);
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roads1_rule_1.append(line_symbolizer(roads1_rule_stk_1));
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roads1_style_1.add_rule(roads1_rule_1);
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m.insert_style("highway-border", roads1_style_1);
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feature_type_style roads1_style_2;
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rule roads1_rule_2;
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roads1_rule_2.set_filter(parse_expression("[CLASS] = 1"));
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stroke roads1_rule_stk_2(color(242,191,36),5.0);
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roads1_rule_stk_2.set_line_cap(ROUND_CAP);
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roads1_rule_stk_2.set_line_join(ROUND_JOIN);
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roads1_rule_2.append(line_symbolizer(roads1_rule_stk_2));
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roads1_style_2.add_rule(roads1_rule_2);
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m.insert_style("highway-fill", roads1_style_2);
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// Populated Places
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feature_type_style popplaces_style;
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rule popplaces_rule;
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text_symbolizer popplaces_text_symbolizer(parse_expression("[GEONAME]"),"DejaVu Sans Book",10,color(0,0,0));
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popplaces_text_symbolizer.set_halo_fill(color(255,255,200));
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popplaces_text_symbolizer.set_halo_radius(1);
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popplaces_rule.append(popplaces_text_symbolizer);
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popplaces_style.add_rule(popplaces_rule);
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m.insert_style("popplaces",popplaces_style );
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// layers
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// Provincial polygons
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{
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parameters p;
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p["type"]="shape";
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p["file"]="../data/boundaries";
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p["encoding"]="latin1";
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layer lyr("Provinces");
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lyr.set_datasource(datasource_cache::instance().create(p));
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lyr.add_style("provinces");
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lyr.set_srs(srs_lcc);
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m.addLayer(lyr);
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}
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// Drainage
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{
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parameters p;
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p["type"]="shape";
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p["file"]="../data/qcdrainage";
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layer lyr("Quebec Hydrography");
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lyr.set_datasource(datasource_cache::instance().create(p));
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lyr.set_srs(srs_lcc);
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lyr.add_style("drainage");
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m.addLayer(lyr);
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}
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{
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parameters p;
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p["type"]="shape";
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p["file"]="../data/ontdrainage";
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layer lyr("Ontario Hydrography");
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lyr.set_datasource(datasource_cache::instance().create(p));
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lyr.set_srs(srs_lcc);
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lyr.add_style("drainage");
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m.addLayer(lyr);
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}
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// Provincial boundaries
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{
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parameters p;
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p["type"]="shape";
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p["file"]="../data/boundaries_l";
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layer lyr("Provincial borders");
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lyr.set_srs(srs_lcc);
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lyr.set_datasource(datasource_cache::instance().create(p));
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lyr.add_style("provlines");
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m.addLayer(lyr);
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}
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// Roads
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{
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parameters p;
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p["type"]="shape";
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p["file"]="../data/roads";
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layer lyr("Roads");
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lyr.set_srs(srs_lcc);
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lyr.set_datasource(datasource_cache::instance().create(p));
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lyr.add_style("smallroads");
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lyr.add_style("road-border");
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lyr.add_style("road-fill");
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lyr.add_style("highway-border");
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lyr.add_style("highway-fill");
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m.addLayer(lyr);
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}
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// popplaces
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{
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parameters p;
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p["type"]="shape";
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p["file"]="../data/popplaces";
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p["encoding"] = "latin1";
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layer lyr("Populated Places");
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lyr.set_srs(srs_lcc);
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lyr.set_datasource(datasource_cache::instance().create(p));
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lyr.add_style("popplaces");
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m.addLayer(lyr);
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}
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m.zoom_to_box(box2d<double>(-8024477.28459,5445190.38849,-7381388.20071,5662941.44855));
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image_32 buf(m.width(),m.height());
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agg_renderer<image_32> ren(m,buf);
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ren.apply();
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#ifdef HAVE_JPEG
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save_to_file(buf,"demo.jpg","jpeg");
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#endif
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#ifdef HAVE_PNG
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save_to_file(buf,"demo.png","png");
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save_to_file(buf,"demo256.png","png8");
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#endif
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#ifdef HAVE_TIFF
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save_to_file(buf,"demo.tif","tiff");
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#endif
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std::cout << "Three maps have been rendered using AGG in the current directory:\n"
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"- demo.jpg\n"
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"- demo.png\n"
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"- demo256.png\n"
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"- demo.tif\n"
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"Have a look!\n";
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#if defined(HAVE_CAIRO)
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// save to pdf/svg files
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save_to_cairo_file(m,"cairo-demo.pdf");
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save_to_cairo_file(m,"cairo-demo.svg");
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/* we could also do:
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save_to_cairo_file(m,"cairo-demo.png");
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but instead let's build up a surface for more flexibility
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*/
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cairo_surface_ptr image_surface(
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cairo_image_surface_create(CAIRO_FORMAT_ARGB32,m.width(),m.height()),
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cairo_surface_closer());
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double scale_factor = 1.0;
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cairo_ptr image_context = (create_context(image_surface));
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mapnik::cairo_renderer<cairo_ptr> png_render(m,image_context,scale_factor);
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png_render.apply();
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// we can now write to png with cairo functionality
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cairo_surface_write_to_png(&*image_surface, "cairo-demo.png");
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// but we can also benefit from quantization by converting
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// to a mapnik image object and then saving that
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image_32 im(image_surface);
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save_to_file(im, "cairo-demo256.png","png8");
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cairo_surface_finish(&*image_surface);
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std::cout << "Three maps have been rendered using Cairo in the current directory:\n"
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"- cairo-demo.png\n"
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"- cairo-demo256.png\n"
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"- cairo-demo.pdf\n"
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"- cairo-demo.svg\n"
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"Have a look!\n";
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#endif
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}
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catch ( const mapnik::config_error & ex )
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{
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std::cerr << "### Configuration error: " << ex.what() << std::endl;
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return EXIT_FAILURE;
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}
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catch ( const std::exception & ex )
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{
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std::cerr << "### std::exception: " << ex.what() << std::endl;
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return EXIT_FAILURE;
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}
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catch ( ... )
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{
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std::cerr << "### Unknown exception." << std::endl;
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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