383 lines
14 KiB
C++
383 lines
14 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2013 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <mapnik/map.hpp>
|
|
#include <mapnik/layer.hpp>
|
|
#include <mapnik/rule.hpp>
|
|
#include <mapnik/feature_type_style.hpp>
|
|
#include <mapnik/graphics.hpp>
|
|
#include <mapnik/text/text_properties.hpp>
|
|
#include <mapnik/datasource_cache.hpp>
|
|
#include <mapnik/font_engine_freetype.hpp>
|
|
#include <mapnik/agg_renderer.hpp>
|
|
#include <mapnik/expression.hpp>
|
|
#include <mapnik/color_factory.hpp>
|
|
#include <mapnik/image_util.hpp>
|
|
#include <mapnik/unicode.hpp>
|
|
#include <mapnik/expression.hpp>
|
|
#include <mapnik/expression_string.hpp>
|
|
#include <mapnik/expression_grammar.hpp>
|
|
|
|
#if defined(HAVE_CAIRO)
|
|
#include <mapnik/cairo_renderer.hpp>
|
|
#include <mapnik/cairo_context.hpp>
|
|
#endif
|
|
|
|
#include <iostream>
|
|
|
|
|
|
int main ( int argc , char** argv)
|
|
{
|
|
using namespace mapnik;
|
|
const std::string srs_lcc="+proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat+1=49 +lat_2=77 \
|
|
+datum=NAD83 +units=m +no_defs";
|
|
const std::string srs_merc="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 \
|
|
+y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over";
|
|
|
|
try {
|
|
std::cout << " running demo ... \n";
|
|
datasource_cache::instance().register_datasources("plugins/input/");
|
|
freetype_engine::register_font("fonts/dejavu-fonts-ttf-2.33/ttf/DejaVuSans.ttf");
|
|
|
|
mapnik::transcoder tr("utf-8");
|
|
mapnik::expression_grammar<std::string::const_iterator> expr_grammar(tr);
|
|
|
|
Map m(800,600);
|
|
m.set_background(parse_color("white"));
|
|
m.set_srs(srs_merc);
|
|
// create styles
|
|
|
|
// Provinces (polygon)
|
|
feature_type_style provpoly_style;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[NAME_EN] = 'Ontario'", expr_grammar));
|
|
{
|
|
polygon_symbolizer poly_sym;
|
|
put(poly_sym, keys::fill, color(250, 190, 183));
|
|
r.append(std::move(poly_sym));
|
|
}
|
|
provpoly_style.add_rule(std::move(r));
|
|
}
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[NOM_FR] = 'Québec'", expr_grammar));
|
|
{
|
|
polygon_symbolizer poly_sym;
|
|
put(poly_sym, keys::fill, color(217, 235, 203));
|
|
r.append(std::move(poly_sym));
|
|
}
|
|
provpoly_style.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("provinces", std::move(provpoly_style));
|
|
|
|
// Provinces (polyline)
|
|
feature_type_style provlines_style;
|
|
{
|
|
rule r;
|
|
{
|
|
line_symbolizer line_sym;
|
|
put(line_sym,keys::stroke,color(0,0,0));
|
|
put(line_sym,keys::stroke_width,1.0);
|
|
dash_array dash;
|
|
dash.emplace_back(8,4);
|
|
dash.emplace_back(2,2);
|
|
dash.emplace_back(2,2);
|
|
put(line_sym,keys::stroke_dasharray,dash);
|
|
r.append(std::move(line_sym));
|
|
}
|
|
provlines_style.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("provlines", std::move(provlines_style));
|
|
|
|
// Drainage
|
|
feature_type_style qcdrain_style;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[HYC] = 8", expr_grammar));
|
|
{
|
|
polygon_symbolizer poly_sym;
|
|
put(poly_sym, keys::fill, color(153, 204, 255));
|
|
r.append(std::move(poly_sym));
|
|
}
|
|
qcdrain_style.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("drainage", std::move(qcdrain_style));
|
|
|
|
// Roads 3 and 4 (The "grey" roads)
|
|
feature_type_style roads34_style;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[CLASS] = 3 or [CLASS] = 4", expr_grammar));
|
|
{
|
|
line_symbolizer line_sym;
|
|
put(line_sym,keys::stroke,color(171,158,137));
|
|
put(line_sym,keys::stroke_width,2.0);
|
|
put(line_sym,keys::stroke_linecap,ROUND_CAP);
|
|
put(line_sym,keys::stroke_linejoin,ROUND_JOIN);
|
|
r.append(std::move(line_sym));
|
|
}
|
|
roads34_style.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("smallroads", std::move(roads34_style));
|
|
|
|
// Roads 2 (The thin yellow ones)
|
|
feature_type_style roads2_style_1;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[CLASS] = 2", expr_grammar));
|
|
{
|
|
line_symbolizer line_sym;
|
|
put(line_sym,keys::stroke,color(171,158,137));
|
|
put(line_sym,keys::stroke_width,4.0);
|
|
put(line_sym,keys::stroke_linecap,ROUND_CAP);
|
|
put(line_sym,keys::stroke_linejoin,ROUND_JOIN);
|
|
r.append(std::move(line_sym));
|
|
}
|
|
roads2_style_1.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("road-border", std::move(roads2_style_1));
|
|
|
|
feature_type_style roads2_style_2;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[CLASS] = 2", expr_grammar));
|
|
{
|
|
line_symbolizer line_sym;
|
|
put(line_sym,keys::stroke,color(255,250,115));
|
|
put(line_sym,keys::stroke_width,2.0);
|
|
put(line_sym,keys::stroke_linecap,ROUND_CAP);
|
|
put(line_sym,keys::stroke_linejoin,ROUND_JOIN);
|
|
r.append(std::move(line_sym));
|
|
}
|
|
roads2_style_2.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("road-fill", std::move(roads2_style_2));
|
|
|
|
// Roads 1 (The big orange ones, the highways)
|
|
feature_type_style roads1_style_1;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[CLASS] = 1", expr_grammar));
|
|
{
|
|
line_symbolizer line_sym;
|
|
put(line_sym,keys::stroke,color(188,149,28));
|
|
put(line_sym,keys::stroke_width,7.0);
|
|
put(line_sym,keys::stroke_linecap,ROUND_CAP);
|
|
put(line_sym,keys::stroke_linejoin,ROUND_JOIN);
|
|
r.append(std::move(line_sym));
|
|
}
|
|
roads1_style_1.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("highway-border", std::move(roads1_style_1));
|
|
|
|
feature_type_style roads1_style_2;
|
|
{
|
|
rule r;
|
|
r.set_filter(parse_expression("[CLASS] = 1", expr_grammar));
|
|
{
|
|
line_symbolizer line_sym;
|
|
put(line_sym,keys::stroke,color(242,191,36));
|
|
put(line_sym,keys::stroke_width,5.0);
|
|
put(line_sym,keys::stroke_linecap,ROUND_CAP);
|
|
put(line_sym,keys::stroke_linejoin,ROUND_JOIN);
|
|
r.append(std::move(line_sym));
|
|
}
|
|
roads1_style_2.add_rule(std::move(r));
|
|
}
|
|
m.insert_style("highway-fill", std::move(roads1_style_2));
|
|
|
|
// Populated Places
|
|
feature_type_style popplaces_style;
|
|
{
|
|
rule r;
|
|
{
|
|
text_symbolizer text_sym;
|
|
text_placements_ptr placement_finder = std::make_shared<text_placements_dummy>();
|
|
placement_finder->defaults.format->face_name = "DejaVu Sans Book";
|
|
placement_finder->defaults.format->text_size = 10;
|
|
placement_finder->defaults.format->fill = color(0,0,0);
|
|
placement_finder->defaults.format->halo_fill = color(255,255,200);
|
|
placement_finder->defaults.format->halo_radius = 1;
|
|
placement_finder->defaults.set_old_style_expression(parse_expression("[GEONAME]", expr_grammar));
|
|
put<text_placements_ptr>(text_sym, keys::text_placements_, placement_finder);
|
|
r.append(std::move(text_sym));
|
|
}
|
|
popplaces_style.add_rule(std::move(r));
|
|
}
|
|
|
|
m.insert_style("popplaces", std::move(popplaces_style));
|
|
|
|
// layers
|
|
// Provincial polygons
|
|
{
|
|
parameters p;
|
|
p["type"]="shape";
|
|
p["file"]="demo/data/boundaries";
|
|
p["encoding"]="latin1";
|
|
|
|
layer lyr("Provinces");
|
|
lyr.set_datasource(datasource_cache::instance().create(p));
|
|
lyr.add_style("provinces");
|
|
lyr.set_srs(srs_lcc);
|
|
m.add_layer(lyr);
|
|
}
|
|
|
|
// Drainage
|
|
{
|
|
parameters p;
|
|
p["type"]="shape";
|
|
p["file"]="demo/data/qcdrainage";
|
|
layer lyr("Quebec Hydrography");
|
|
lyr.set_datasource(datasource_cache::instance().create(p));
|
|
lyr.set_srs(srs_lcc);
|
|
lyr.add_style("drainage");
|
|
m.add_layer(lyr);
|
|
}
|
|
|
|
{
|
|
parameters p;
|
|
p["type"]="shape";
|
|
p["file"]="demo/data/ontdrainage";
|
|
layer lyr("Ontario Hydrography");
|
|
lyr.set_datasource(datasource_cache::instance().create(p));
|
|
lyr.set_srs(srs_lcc);
|
|
lyr.add_style("drainage");
|
|
m.add_layer(lyr);
|
|
}
|
|
|
|
// Provincial boundaries
|
|
{
|
|
parameters p;
|
|
p["type"]="shape";
|
|
p["file"]="demo/data/boundaries_l";
|
|
layer lyr("Provincial borders");
|
|
lyr.set_srs(srs_lcc);
|
|
lyr.set_datasource(datasource_cache::instance().create(p));
|
|
lyr.add_style("provlines");
|
|
m.add_layer(lyr);
|
|
}
|
|
|
|
// Roads
|
|
{
|
|
parameters p;
|
|
p["type"]="shape";
|
|
p["file"]="demo/data/roads";
|
|
layer lyr("Roads");
|
|
lyr.set_srs(srs_lcc);
|
|
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.add_layer(lyr);
|
|
}
|
|
// popplaces
|
|
{
|
|
parameters p;
|
|
p["type"]="shape";
|
|
p["file"]="demo/data/popplaces";
|
|
p["encoding"] = "latin1";
|
|
layer lyr("Populated Places");
|
|
lyr.set_srs(srs_lcc);
|
|
lyr.set_datasource(datasource_cache::instance().create(p));
|
|
lyr.add_style("popplaces");
|
|
m.add_layer(lyr);
|
|
}
|
|
|
|
m.zoom_to_box(box2d<double>(-8024477.28459,5445190.38849,-7381388.20071,5662941.44855));
|
|
|
|
image_32 buf(m.width(),m.height());
|
|
agg_renderer<image_32> ren(m,buf);
|
|
ren.apply();
|
|
std::string msg("These maps have been rendered using AGG in the current directory:\n");
|
|
#ifdef HAVE_JPEG
|
|
save_to_file(buf,"demo.jpg","jpeg");
|
|
msg += "- demo.jpg\n";
|
|
#endif
|
|
#ifdef HAVE_PNG
|
|
save_to_file(buf,"demo.png","png");
|
|
save_to_file(buf,"demo256.png","png8");
|
|
msg += "- demo.png\n";
|
|
msg += "- demo256.png\n";
|
|
#endif
|
|
#ifdef HAVE_TIFF
|
|
save_to_file(buf,"demo.tif","tiff");
|
|
msg += "- demo.tif\n";
|
|
#endif
|
|
#ifdef HAVE_WEBP
|
|
save_to_file(buf,"demo.webp","webp");
|
|
msg += "- demo.webp\n";
|
|
#endif
|
|
msg += "Have a look!\n";
|
|
std::cout << msg;
|
|
|
|
#if defined(HAVE_CAIRO)
|
|
// save to pdf/svg files
|
|
save_to_cairo_file(m,"cairo-demo.pdf");
|
|
save_to_cairo_file(m,"cairo-demo.svg");
|
|
|
|
/* we could also do:
|
|
|
|
save_to_cairo_file(m,"cairo-demo.png");
|
|
|
|
but instead let's build up a surface for more flexibility
|
|
*/
|
|
|
|
cairo_surface_ptr image_surface(
|
|
cairo_image_surface_create(CAIRO_FORMAT_ARGB32,m.width(),m.height()),
|
|
cairo_surface_closer());
|
|
double scale_factor = 1.0;
|
|
cairo_ptr image_context(create_context(image_surface));
|
|
mapnik::cairo_renderer<cairo_ptr> png_render(m,image_context,scale_factor);
|
|
png_render.apply();
|
|
// we can now write to png with cairo functionality
|
|
cairo_surface_write_to_png(&*image_surface, "cairo-demo.png");
|
|
// but we can also benefit from quantization by converting
|
|
// to a mapnik image object and then saving that
|
|
image_32 im(image_surface);
|
|
save_to_file(im, "cairo-demo256.png","png8");
|
|
cairo_surface_finish(&*image_surface);
|
|
|
|
std::cout << "Three maps have been rendered using Cairo in the current directory:\n"
|
|
"- cairo-demo.png\n"
|
|
"- cairo-demo256.png\n"
|
|
"- cairo-demo.pdf\n"
|
|
"- cairo-demo.svg\n"
|
|
"Have a look!\n";
|
|
#endif
|
|
|
|
}
|
|
catch ( std::exception const& ex )
|
|
{
|
|
std::cerr << "### std::exception: " << ex.what() << std::endl;
|
|
return EXIT_FAILURE;
|
|
}
|
|
catch ( ... )
|
|
{
|
|
std::cerr << "### Unknown exception." << std::endl;
|
|
return EXIT_FAILURE;
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|