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mapnik/demo/c++/rundemo.cpp

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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2006 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
*
*****************************************************************************/
// $Id$
#include <mapnik/map.hpp>
#include <mapnik/datasource_cache.hpp>
#include <mapnik/font_engine_freetype.hpp>
#include <mapnik/agg_renderer.hpp>
#include <mapnik/filter_factory.hpp>
#include <mapnik/color_factory.hpp>
#include <mapnik/image_util.hpp>
#include <iostream>
int main ( int argc , char** argv)
{
if (argc != 2)
{
std::cout << "usage: ./rundemo <plugins_dir>\n";
return EXIT_SUCCESS;
}
std::cout << " running demo ... \n";
using namespace mapnik;
datasource_cache::instance()->register_datasources(argv[1]);
freetype_engine::instance()->register_font("/usr/local/lib/mapnik/fonts/DejaVuSans.ttf");
Map m(800,600);
m.set_background(color_factory::from_string("white"));
// create styles
// Provinces (polygon)
feature_type_style provpoly_style;
rule_type provpoly_rule_on;
provpoly_rule_on.set_filter(create_filter("[NAME_EN] = 'Ontario'"));
provpoly_rule_on.append(polygon_symbolizer(Color(250, 190, 183)));
provpoly_style.add_rule(provpoly_rule_on);
rule_type provpoly_rule_qc;
provpoly_rule_qc.set_filter(create_filter("[NAME_EN] = 'Quebec'"));
provpoly_rule_qc.append(polygon_symbolizer(Color(217, 235, 203)));
provpoly_style.add_rule(provpoly_rule_qc);
m.insert_style("provinces",provpoly_style);
// Provinces (polyline)
feature_type_style provlines_style;
stroke provlines_stk (Color(0,0,0),1.0);
provlines_stk.add_dash(8, 4);
provlines_stk.add_dash(2, 2);
provlines_stk.add_dash(2, 2);
rule_type provlines_rule;
provlines_rule.append(line_symbolizer(provlines_stk));
provlines_style.add_rule(provlines_rule);
m.insert_style("provlines",provlines_style);
// Drainage
feature_type_style qcdrain_style;
rule_type qcdrain_rule;
qcdrain_rule.set_filter(create_filter("[HYC] = 8"));
qcdrain_rule.append(polygon_symbolizer(Color(153, 204, 255)));
qcdrain_style.add_rule(qcdrain_rule);
m.insert_style("drainage",qcdrain_style);
// Roads 3 and 4 (The "grey" roads)
feature_type_style roads34_style;
rule_type roads34_rule;
roads34_rule.set_filter(create_filter("[CLASS] = 3 or [CLASS] = 4"));
stroke roads34_rule_stk(Color(171,158,137),2.0);
roads34_rule_stk.set_line_cap(ROUND_CAP);
roads34_rule_stk.set_line_join(ROUND_JOIN);
roads34_rule.append(line_symbolizer(roads34_rule_stk));
roads34_style.add_rule(roads34_rule);
m.insert_style("smallroads",roads34_style);
// Roads 2 (The thin yellow ones)
feature_type_style roads2_style_1;
rule_type roads2_rule_1;
roads2_rule_1.set_filter(create_filter("[CLASS] = 2"));
stroke roads2_rule_stk_1(Color(171,158,137),4.0);
roads2_rule_stk_1.set_line_cap(ROUND_CAP);
roads2_rule_stk_1.set_line_join(ROUND_JOIN);
roads2_rule_1.append(line_symbolizer(roads2_rule_stk_1));
roads2_style_1.add_rule(roads2_rule_1);
m.insert_style("road-border", roads2_style_1);
feature_type_style roads2_style_2;
rule_type roads2_rule_2;
roads2_rule_2.set_filter(create_filter("[CLASS] = 2"));
stroke roads2_rule_stk_2(Color(255,250,115),2.0);
roads2_rule_stk_2.set_line_cap(ROUND_CAP);
roads2_rule_stk_2.set_line_join(ROUND_JOIN);
roads2_rule_2.append(line_symbolizer(roads2_rule_stk_2));
roads2_style_2.add_rule(roads2_rule_2);
m.insert_style("road-fill", roads2_style_2);
// Roads 1 (The big orange ones, the highways)
feature_type_style roads1_style_1;
rule_type roads1_rule_1;
roads1_rule_1.set_filter(create_filter("[CLASS] = 1"));
stroke roads1_rule_stk_1(Color(188,149,28),7.0);
roads1_rule_stk_1.set_line_cap(ROUND_CAP);
roads1_rule_stk_1.set_line_join(ROUND_JOIN);
roads1_rule_1.append(line_symbolizer(roads1_rule_stk_1));
roads1_style_1.add_rule(roads1_rule_1);
m.insert_style("highway-border", roads1_style_1);
feature_type_style roads1_style_2;
rule_type roads1_rule_2;
roads1_rule_2.set_filter(create_filter("[CLASS] = 1"));
stroke roads1_rule_stk_2(Color(242,191,36),5.0);
roads1_rule_stk_2.set_line_cap(ROUND_CAP);
roads1_rule_stk_2.set_line_join(ROUND_JOIN);
roads1_rule_2.append(line_symbolizer(roads1_rule_stk_2));
roads1_style_2.add_rule(roads1_rule_2);
m.insert_style("highway-fill", roads1_style_2);
// Populated Places
feature_type_style popplaces_style;
rule_type popplaces_rule;
text_symbolizer popplaces_text_symbolizer("GEONAME","DejaVu Sans Book",10,Color(0,0,0));
popplaces_text_symbolizer.set_halo_fill(Color(255,255,200));
popplaces_text_symbolizer.set_halo_radius(1);
popplaces_rule.append(popplaces_text_symbolizer);
popplaces_style.add_rule(popplaces_rule);
m.insert_style("popplaces",popplaces_style );
// Layers
// Provincial polygons
{
parameters p;
p["type"]="shape";
p["file"]="../data/boundaries";
Layer lyr("Provinces");
lyr.set_datasource(datasource_cache::instance()->create(p));
lyr.add_style("provinces");
m.addLayer(lyr);
}
// Drainage
{
parameters p;
p["type"]="shape";
p["file"]="../data/qcdrainage";
Layer lyr("Quebec Hydrography");
lyr.set_datasource(datasource_cache::instance()->create(p));
lyr.add_style("drainage");
m.addLayer(lyr);
}
{
parameters p;
p["type"]="shape";
p["file"]="../data/ontdrainage";
Layer lyr("Ontario Hydrography");
lyr.set_datasource(datasource_cache::instance()->create(p));
lyr.add_style("drainage");
m.addLayer(lyr);
}
// Provincial boundaries
{
parameters p;
p["type"]="shape";
p["file"]="../data/boundaries_l";
Layer lyr("Provincial borders");
lyr.set_datasource(datasource_cache::instance()->create(p));
lyr.add_style("provlines");
m.addLayer(lyr);
}
// Roads
{
parameters p;
p["type"]="shape";
p["file"]="../data/roads";
Layer lyr("Roads");
lyr.set_datasource(datasource_cache::instance()->create(p));
lyr.add_style("smallroads");
lyr.add_style("road-border");
lyr.add_style("road-fill");
lyr.add_style("highway-border");
lyr.add_style("highway-fill");
m.addLayer(lyr);
}
// popplaces
{
parameters p;
p["type"]="shape";
p["file"]="../data/popplaces";
p["encoding"] = "latin1";
Layer lyr("Populated Places");
lyr.set_datasource(datasource_cache::instance()->create(p));
lyr.add_style("popplaces");
m.addLayer(lyr);
}
m.zoomToBox(Envelope<double>(1405120.04127408,-247003.813399447,
1706357.31328276,-25098.593149577));
Image32 buf(m.getWidth(),m.getHeight());
agg_renderer<Image32> ren(m,buf);
ren.apply();
save_to_file<ImageData32>("demo.jpg","jpeg",buf.data());
save_to_file<ImageData32>("demo.png","png",buf.data());
std::cout << "Two maps have been rendered in the current directory:\n"
"- demo.jpg\n"
"- demo.png\n"
"Have a look!\n";
return EXIT_SUCCESS;
}
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