/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2014 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/debug.hpp> #include <mapnik/geometry.hpp> // ogr #include "ogr_converter.hpp" #include <ogr_core.h> #include <ogr_geometry.h> mapnik::geometry::geometry ogr_converter::convert_geometry(OGRGeometry* ogr_geom) { // NOTE: wkbFlatten macro in ogr flattens 2.5d types into base 2d type switch (wkbFlatten(ogr_geom->getGeometryType())) { case wkbPoint: return convert_point(static_cast<OGRPoint*>(ogr_geom)); break; case wkbMultiPoint: return convert_multipoint(static_cast<OGRMultiPoint*>(ogr_geom)); break; case wkbLinearRing: return convert_linestring(static_cast<OGRLinearRing*>(ogr_geom)); break; case wkbLineString: return convert_linestring(static_cast<OGRLineString*>(ogr_geom)); break; case wkbMultiLineString: return convert_multilinestring(static_cast<OGRMultiLineString*>(ogr_geom)); break; case wkbPolygon: return convert_polygon(static_cast<OGRPolygon*>(ogr_geom)); break; case wkbMultiPolygon: return convert_multipolygon(static_cast<OGRMultiPolygon*>(ogr_geom)); break; case wkbGeometryCollection: return convert_collection(static_cast<OGRGeometryCollection*>(ogr_geom)); break; case wkbNone: case wkbUnknown: default: { MAPNIK_LOG_WARN(ogr) << "ogr_converter: unknown <ogr> geometry_type=" << wkbFlatten(ogr_geom->getGeometryType()); } return mapnik::geometry::geometry(); break; } } mapnik::geometry::point ogr_converter::convert_point(OGRPoint* ogr_geom) { return mapnik::geometry::point(ogr_geom->getX(), ogr_geom->getY()); } mapnik::geometry::multi_point ogr_converter::convert_multipoint(OGRMultiPoint* ogr_geom) { mapnik::geometry::multi_point geom; int num_geometries = ogr_geom->getNumGeometries(); geom.reserve(num_geometries); for (int i = 0; i < num_geometries; ++i) { OGRPoint const* pt = static_cast<OGRPoint*>(ogr_geom->getGeometryRef(i)); geom.emplace_back(pt->getX(), pt->getY()); } return geom; } mapnik::geometry::line_string ogr_converter::convert_linestring(OGRLineString* ogr_geom) { mapnik::geometry::line_string geom; int num_points = ogr_geom->getNumPoints(); geom.reserve(num_points); for (int i = 0; i < num_points; ++i) { geom.add_coord(ogr_geom->getX(i), ogr_geom->getY(i)); } return geom; } mapnik::geometry::multi_line_string ogr_converter::convert_multilinestring(OGRMultiLineString* ogr_geom) { mapnik::geometry::multi_line_string geom; int num_geometries = ogr_geom->getNumGeometries(); geom.reserve(num_geometries); for (int i = 0; i < num_geometries; ++i) { geom.emplace_back(std::move( convert_linestring(static_cast<OGRLineString*>(ogr_geom->getGeometryRef(i))))); } return geom; } mapnik::geometry::polygon ogr_converter::convert_polygon(OGRPolygon* ogr_geom) { mapnik::geometry::polygon geom; mapnik::geometry::linear_ring exterior; OGRLinearRing* ogr_exterior = ogr_geom->getExteriorRing(); int num_points = ogr_exterior->getNumPoints(); exterior.reserve(num_points); for (int i = 0; i < num_points; ++i) { exterior.emplace_back(ogr_exterior->getX(i), ogr_exterior->getY(i)); } geom.set_exterior_ring(std::move(exterior)); int num_interior = ogr_geom->getNumInteriorRings(); for (int r = 0; r < num_interior; ++r) { OGRLinearRing* ogr_interior = ogr_geom->getInteriorRing(r); mapnik::geometry::linear_ring interior; int num_interior_points = ogr_interior->getNumPoints(); interior.reserve(num_interior_points); for (int i = 0; i < num_interior_points; ++i) { interior.emplace_back(ogr_interior->getX(i), ogr_interior->getY(i)); } geom.add_hole(std::move(interior)); } return geom; } mapnik::geometry::multi_polygon ogr_converter::convert_multipolygon(OGRMultiPolygon* ogr_geom) { mapnik::geometry::multi_polygon geom; int num_geometries = ogr_geom->getNumGeometries(); geom.reserve(num_geometries); for (int i = 0; i < num_geometries; ++i) { geom.emplace_back(std::move( convert_polygon(static_cast<OGRPolygon*>(ogr_geom->getGeometryRef(i))))); } return geom; } mapnik::geometry::geometry_collection ogr_converter::convert_collection(OGRGeometryCollection* ogr_geom) { mapnik::geometry::geometry_collection geom; int num_geometries = ogr_geom->getNumGeometries(); geom.reserve(num_geometries); for (int i = 0; i < num_geometries; ++i) { OGRGeometry* g = ogr_geom->getGeometryRef(i); if (g != nullptr) { geom.emplace_back(std::move(convert_geometry(g))); } } return geom; }