446 lines
12 KiB
C++
446 lines
12 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2010 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id$
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#include <mapnik/global.hpp>
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#include <mapnik/box2d.hpp>
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#include <mapnik/geometry.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/feature_layer_desc.hpp>
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#include <mapnik/wkb.hpp>
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#include <mapnik/unicode.hpp>
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// geos
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#include "geos_converter.hpp"
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using std::clog;
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using std::endl;
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using mapnik::feature_ptr;
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using mapnik::geometry_utils;
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using mapnik::geometry_type;
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void geos_converter::convert_geometry (const GEOSGeometry* geom, feature_ptr feature, bool multiple_geometries)
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{
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int type = GEOSGeomTypeId(geom);
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switch ( type )
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{
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case GEOS_POINT:
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convert_point (geom, feature);
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break;
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case GEOS_LINESTRING:
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case GEOS_LINEARRING:
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convert_linestring (geom, feature);
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break;
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case GEOS_POLYGON:
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convert_polygon (geom, feature);
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break;
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case GEOS_MULTIPOINT:
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if (multiple_geometries)
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convert_multipoint_2 (geom, feature);
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else
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// Todo - using convert_multipoint_2 until we have proper multipoint handling in convert_multipoint
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// http://trac.mapnik.org/ticket/458
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//convert_multipoint (geom, feature);
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convert_multipoint_2 (geom, feature);
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break;
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case GEOS_MULTILINESTRING:
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if (multiple_geometries)
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convert_multilinestring_2 (geom, feature);
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else
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convert_multilinestring (geom, feature);
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break;
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case GEOS_MULTIPOLYGON:
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if (multiple_geometries)
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convert_multipolygon_2 (geom, feature);
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else
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convert_multipolygon (geom, feature);
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break;
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case GEOS_GEOMETRYCOLLECTION:
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convert_collection (geom, feature, multiple_geometries);
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break;
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default:
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#ifdef MAPNIK_DEBUG
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clog << "unknown <geos> geometry_type=" << type << endl;
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#endif
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break;
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}
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}
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void geos_converter::convert_point (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_point" << endl;
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#endif
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double x, y;
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unsigned int size;
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const GEOSCoordSequence* cs = GEOSGeom_getCoordSeq(geom);
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GEOSCoordSeq_getSize(cs, &size);
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GEOSCoordSeq_getX(cs, 0, &x);
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GEOSCoordSeq_getY(cs, 0, &y);
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geometry_type* point = new geometry_type(mapnik::Point);
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point->move_to (x, y);
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feature->add_geometry (point);
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}
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void geos_converter::convert_linestring (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_linestring" << endl;
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#endif
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double x, y;
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unsigned int num_points;
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const GEOSCoordSequence* cs = GEOSGeom_getCoordSeq(geom);
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GEOSCoordSeq_getSize(cs, &num_points);
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GEOSCoordSeq_getX(cs, 0, &x);
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GEOSCoordSeq_getY(cs, 0, &y);
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geometry_type* line = new geometry_type(mapnik::LineString);
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line->set_capacity (num_points);
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line->move_to (x, y);
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for (unsigned int i = 1; i < num_points; ++i)
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{
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GEOSCoordSeq_getX(cs, i, &x);
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GEOSCoordSeq_getY(cs, i, &y);
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line->line_to (x, y);
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}
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feature->add_geometry (line);
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}
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void geos_converter::convert_polygon (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_polygon" << endl;
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#endif
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double x, y;
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unsigned int num_points, num_interior;
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const GEOSGeometry* exterior = GEOSGetExteriorRing(geom);
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const GEOSCoordSequence* es = GEOSGeom_getCoordSeq(exterior);
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GEOSCoordSeq_getSize(es, &num_points);
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GEOSCoordSeq_getX(es, 0, &x);
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GEOSCoordSeq_getY(es, 0, &y);
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num_interior = GEOSGetNumInteriorRings(geom);
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unsigned int capacity = 0;
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for (unsigned int r = 0; r < num_interior; r++)
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{
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const GEOSGeometry* gtmp = GEOSGetInteriorRingN(geom, r);
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const GEOSCoordSequence* is = GEOSGeom_getCoordSeq(gtmp);
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unsigned int interior_size;
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GEOSCoordSeq_getSize(is, &interior_size);
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capacity += interior_size;
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}
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geometry_type* poly = new geometry_type(mapnik::Polygon);
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poly->set_capacity (num_points + capacity);
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poly->move_to (x, y);
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for (unsigned int i = 1; i < num_points; ++i)
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{
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GEOSCoordSeq_getX(es, i, &x);
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GEOSCoordSeq_getY(es, i, &y);
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poly->line_to (x, y);
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}
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for (unsigned int r = 0; r < num_interior; ++r)
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{
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const GEOSGeometry* gtmp = GEOSGetInteriorRingN(geom, r);
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const GEOSCoordSequence* is = GEOSGeom_getCoordSeq(gtmp);
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GEOSCoordSeq_getSize(is, &num_points);
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GEOSCoordSeq_getX(is, 0, &x);
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GEOSCoordSeq_getY(is, 0, &y);
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poly->move_to(x, y);
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for (unsigned int i = 1; i < num_points; ++i)
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{
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GEOSCoordSeq_getX(is, i, &x);
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GEOSCoordSeq_getY(is, i, &y);
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poly->line_to(x, y);
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}
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}
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feature->add_geometry (poly);
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}
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void geos_converter::convert_multipoint (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_multipoint" << endl;
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#endif
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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geometry_type* point = new geometry_type(mapnik::Point);
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for (unsigned int i = 0; i < num_geometries; i++)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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const GEOSCoordSequence* cs = GEOSGeom_getCoordSeq(g);
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double x, y;
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//GEOSCoordSeq_getSize(cs, &size);
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GEOSCoordSeq_getX(cs, 0, &x);
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GEOSCoordSeq_getY(cs, 0, &y);
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point->move_to (x, y);
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}
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}
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feature->add_geometry (point);
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}
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void geos_converter::convert_multipoint_2 (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_multipoint_2" << endl;
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#endif
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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convert_point (g, feature);
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}
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}
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}
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void geos_converter::convert_multilinestring (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_multilinestring" << endl;
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#endif
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double x, y;
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unsigned int num_points = 0;
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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const GEOSCoordSequence* cs = GEOSGeom_getCoordSeq(g);
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unsigned int temp_points;
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GEOSCoordSeq_getSize(cs, &temp_points);
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num_points += temp_points;
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}
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}
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geometry_type* line = new geometry_type(mapnik::LineString);
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line->set_capacity (num_points);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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const GEOSCoordSequence* cs = GEOSGeom_getCoordSeq(g);
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GEOSCoordSeq_getSize(cs, &num_points);
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GEOSCoordSeq_getX(cs, 0, &x);
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GEOSCoordSeq_getY(cs, 0, &y);
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line->move_to (x, y);
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for (unsigned int i = 1; i < num_points; ++i)
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{
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GEOSCoordSeq_getX(cs, i, &x);
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GEOSCoordSeq_getY(cs, i, &y);
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line->line_to (x, y);
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}
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}
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}
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feature->add_geometry (line);
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}
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void geos_converter::convert_multilinestring_2 (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_multilinestring_2" << endl;
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#endif
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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convert_linestring (g, feature);
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}
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}
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}
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void geos_converter::convert_multipolygon (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_multipolygon" << endl;
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#endif
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double x, y;
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unsigned int num_points, num_interior;
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unsigned int capacity = 0;
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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const GEOSGeometry* exterior = GEOSGetExteriorRing(g);
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const GEOSCoordSequence* es = GEOSGeom_getCoordSeq(exterior);
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GEOSCoordSeq_getSize(es, &num_points);
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capacity += num_points;
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num_interior = GEOSGetNumInteriorRings(g);
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for (unsigned int r = 0; r < num_interior; r++)
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{
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const GEOSGeometry* gtmp = GEOSGetInteriorRingN(g, r);
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const GEOSCoordSequence* is = GEOSGeom_getCoordSeq(gtmp);
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unsigned int interior_size;
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GEOSCoordSeq_getSize(is, &interior_size);
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capacity += interior_size;
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}
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}
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}
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geometry_type* poly = new geometry_type(mapnik::Polygon);
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poly->set_capacity (capacity);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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const GEOSGeometry* exterior = GEOSGetExteriorRing(g);
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const GEOSCoordSequence* es = GEOSGeom_getCoordSeq(exterior);
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GEOSCoordSeq_getSize(es, &num_points);
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GEOSCoordSeq_getX(es, 0, &x);
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GEOSCoordSeq_getY(es, 0, &y);
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num_interior = GEOSGetNumInteriorRings(g);
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poly->move_to (x, y);
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for (unsigned int i = 1; i < num_points; ++i)
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{
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GEOSCoordSeq_getX(es, i, &x);
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GEOSCoordSeq_getY(es, i, &y);
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poly->line_to (x, y);
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}
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for (unsigned int r = 0; r < num_interior; ++r)
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{
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const GEOSGeometry* gtmp = GEOSGetInteriorRingN(g, r);
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const GEOSCoordSequence* is = GEOSGeom_getCoordSeq(gtmp);
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GEOSCoordSeq_getSize(is, &num_points);
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GEOSCoordSeq_getX(is, 0, &x);
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GEOSCoordSeq_getY(is, 0, &y);
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poly->move_to(x, y);
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for (unsigned int i = 1; i < num_points; ++i)
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{
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GEOSCoordSeq_getX(is, i, &x);
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GEOSCoordSeq_getY(is, i, &y);
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poly->line_to(x, y);
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}
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}
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}
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}
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feature->add_geometry (poly);
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}
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void geos_converter::convert_multipolygon_2 (const GEOSGeometry* geom, feature_ptr feature)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_multipolygon_2" << endl;
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#endif
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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convert_polygon (g, feature);
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}
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}
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}
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void geos_converter::convert_collection (const GEOSGeometry* geom, feature_ptr feature, bool multiple_geometries)
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{
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#ifdef MAPNIK_DEBUG
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clog << "convert_collection" << endl;
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#endif
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unsigned int num_geometries = GEOSGetNumGeometries(geom);
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for (unsigned int i = 0; i < num_geometries; ++i)
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{
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const GEOSGeometry* g = GEOSGetGeometryN(geom, i);
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if (g != NULL && GEOSisValid(g))
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{
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convert_geometry (g, feature, multiple_geometries);
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}
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}
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}
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