New version

myOwnMapnik.cxx

+#define BOOST_SPIRIT_THREADSAFE
+
+#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 <mapnik/config_error.hpp>
+#include <mapnik/memory_datasource.hpp>
+#include <iostream>
+
+int main ( int argc , char** argv)
+{
+  using namespace mapnik;
+  datasource_cache::instance()->register_datasources( "/home/christop/opensource/mapnik/plugins/input/shape");
+  freetype_engine::register_font("/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf");
+
+
+  Map m(800,600);
+  m.set_background(color_factory::from_string("cadetblue"));
+
+//   {
+//   feature_type_style style;
+//   rule_type rule;
+//   rule.append(polygon_symbolizer(color(250, 190, 183)));
+//   rule.append(line_symbolizer(color('rgb(50%,50%,50%)'),0.1));
+//   style.add_rule(rule);
+//   m.insert_style("world",style);
+//   }
+
+  {
+    feature_type_style style;
+    rule_type rule;
+    rule.set_max_scale(250000000000LLU);
+    rule.set_min_scale(600000);
+    rule.append(polygon_symbolizer(color("#f2efe9")));
+    style.add_rule(rule);
+    m.insert_style("world",style);
+  }
+  {
+    feature_type_style style;
+    rule_type rule;
+    rule.set_max_scale(600000);
+    rule.append(polygon_symbolizer(color("#f2efe9")));
+    style.add_rule(rule);
+    m.insert_style("coast-poly",style);
+  }
+
+  typedef vertex<double,2> vertex2d;
+  typedef line_string<vertex2d,vertex_vector2> line2d;
+  typedef boost::shared_ptr<line2d> line_ptr;
+  geometry2d * line = new line2d;
+//   vertex2d.x = 0;
+//   vertex2d.y = 0;
+  std::cout << line->num_points() << std::endl;
+  line->line_to(0,0);
+  line->line_to(45,45);
+  line->line_to(50,30);
+  line->line_to(0,-30);
+  std::cout << line->num_points() << std::endl;
+
+  typedef boost::shared_ptr<raster> raster_ptr;
+  typedef feature<geometry2d,raster_ptr> Feature;
+  typedef boost::shared_ptr<Feature> feature_ptr;
+  feature_ptr mfeature = feature_ptr(new Feature(1));
+  mfeature->add_geometry(line);
+
+  typedef boost::shared_ptr<memory_datasource> datasource_ptr;
+  datasource_ptr mDatasource = datasource_ptr(new memory_datasource);
+  mDatasource->push(mfeature);
+
+
+
+  parameters p;
+  p["type"]="shape";
+  p["file"]="world_borders";
+
+  Layer lyr("world");
+//   lyr.set_datasource(datasource_cache::instance()->create(p));
+  lyr.set_datasource(mDatasource);
+  lyr.add_style("world");
+  m.addLayer(lyr);
+
+
+  m.zoomToBox(lyr.envelope());
+
+  Image32 buf(m.getWidth(),m.getHeight());
+  agg_renderer<Image32> ren(m,buf);
+  ren.apply();
+
+  save_to_file<ImageData32>(buf.data(),"myOwn.png","png");
+
+
+  return EXIT_SUCCESS;
+}
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