/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2011 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 * *****************************************************************************/ // mapnik #include <mapnik/global.hpp> #include <mapnik/debug.hpp> #include <mapnik/box2d.hpp> #include <mapnik/geometry.hpp> #include <mapnik/feature.hpp> #include <mapnik/feature_layer_desc.hpp> #include <mapnik/wkb.hpp> #include <mapnik/unicode.hpp> // ogr #include "ogr_converter.hpp" using mapnik::feature_ptr; using mapnik::geometry_utils; using mapnik::geometry_type; void ogr_converter::convert_geometry(OGRGeometry* geom, feature_ptr feature) { // NOTE: wkbFlatten macro in ogr flattens 2.5d types into base 2d type switch (wkbFlatten(geom->getGeometryType())) { case wkbPoint: convert_point(static_cast<OGRPoint*>(geom), feature); break; case wkbMultiPoint: convert_multipoint(static_cast<OGRMultiPoint*>(geom), feature); break; case wkbLinearRing: convert_linestring(static_cast<OGRLinearRing*>(geom), feature); break; case wkbLineString: convert_linestring(static_cast<OGRLineString*>(geom), feature); break; case wkbMultiLineString: convert_multilinestring(static_cast<OGRMultiLineString*>(geom), feature); break; case wkbPolygon: convert_polygon(static_cast<OGRPolygon*>(geom), feature); break; case wkbMultiPolygon: convert_multipolygon(static_cast<OGRMultiPolygon*>(geom), feature); break; case wkbGeometryCollection: convert_collection(static_cast<OGRGeometryCollection*>(geom), feature); break; case wkbNone: case wkbUnknown: default: { MAPNIK_LOG_WARN(ogr) << "ogr_converter: unknown <ogr> geometry_type=" << wkbFlatten(geom->getGeometryType()); } break; } } void ogr_converter::convert_point(OGRPoint* geom, feature_ptr feature) { std::auto_ptr<geometry_type> point(new geometry_type(mapnik::Point)); point->move_to(geom->getX(), geom->getY()); feature->paths().push_back(point); } void ogr_converter::convert_linestring(OGRLineString* geom, feature_ptr feature) { int num_points = geom->getNumPoints(); std::auto_ptr<geometry_type> line(new geometry_type(mapnik::LineString)); line->move_to(geom->getX(0), geom->getY(0)); for (int i = 1; i < num_points; ++i) { line->line_to (geom->getX(i), geom->getY(i)); } feature->paths().push_back(line); } void ogr_converter::convert_polygon(OGRPolygon* geom, feature_ptr feature) { OGRLinearRing* exterior = geom->getExteriorRing(); int num_points = exterior->getNumPoints(); int num_interior = geom->getNumInteriorRings(); int capacity = 0; for (int r = 0; r < num_interior; ++r) { OGRLinearRing* interior = geom->getInteriorRing(r); capacity += interior->getNumPoints(); } std::auto_ptr<geometry_type> poly(new geometry_type(mapnik::Polygon)); poly->move_to(exterior->getX(0), exterior->getY(0)); for (int i = 1; i < num_points - 1; ++i) { poly->line_to(exterior->getX(i), exterior->getY(i)); } poly->close(exterior->getX(num_points-1), exterior->getY(num_points-1)); for (int r = 0; r < num_interior; ++r) { OGRLinearRing* interior = geom->getInteriorRing(r); num_points = interior->getNumPoints(); poly->move_to(interior->getX(0), interior->getY(0)); for (int i = 1; i < num_points - 1; ++i) { poly->line_to(interior->getX(i), interior->getY(i)); } poly->close(interior->getX(num_points-1), interior->getY(num_points-1)); } feature->paths().push_back(poly); } void ogr_converter::convert_multipoint(OGRMultiPoint* geom, feature_ptr feature) { int num_geometries = geom->getNumGeometries(); for (int i = 0; i < num_geometries; ++i) { convert_point(static_cast<OGRPoint*>(geom->getGeometryRef(i)), feature); } } void ogr_converter::convert_multilinestring(OGRMultiLineString* geom, feature_ptr feature) { int num_geometries = geom->getNumGeometries(); for (int i = 0; i < num_geometries; ++i) { convert_linestring(static_cast<OGRLineString*>(geom->getGeometryRef(i)), feature); } } void ogr_converter::convert_multipolygon(OGRMultiPolygon* geom, feature_ptr feature) { int num_geometries = geom->getNumGeometries(); for (int i = 0; i < num_geometries; ++i) { convert_polygon(static_cast<OGRPolygon*>(geom->getGeometryRef(i)), feature); } } void ogr_converter::convert_collection(OGRGeometryCollection* geom, feature_ptr feature) { int num_geometries = geom->getNumGeometries(); for (int i = 0; i < num_geometries; ++i) { OGRGeometry* g = geom->getGeometryRef(i); if (g != NULL) { convert_geometry(g, feature); } } }