405 lines
12 KiB
C++
405 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) 2007 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/datasource.hpp>
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#include <mapnik/envelope.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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// ogr
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#include "ogr_featureset.hpp"
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using std::clog;
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using std::endl;
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using mapnik::query;
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using mapnik::Envelope;
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using mapnik::CoordTransform;
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using mapnik::Feature;
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using mapnik::feature_ptr;
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using mapnik::point_impl;
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using mapnik::line_string_impl;
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using mapnik::polygon_impl;
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using mapnik::geometry2d;
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using mapnik::geometry_utils;
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using mapnik::transcoder;
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class ogr_feature_ptr
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{
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public:
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ogr_feature_ptr (OGRFeature* const feat)
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: feat_ (feat)
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{
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}
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~ogr_feature_ptr ()
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{
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if (feat_ != NULL)
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OGRFeature::DestroyFeature (feat_);
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}
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OGRFeature* operator*()
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{
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return feat_;
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}
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private:
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OGRFeature* feat_;
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};
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ogr_featureset::ogr_featureset(OGRDataSource & dataset,
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OGRLayer & layer,
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std::string const& encoding,
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bool multiple_geometries)
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: dataset_(dataset),
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layer_(layer),
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layerdef_(layer.GetLayerDefn()),
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tr_(new transcoder(encoding)),
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fidcolumn_(layer_.GetFIDColumn ()),
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multiple_geometries_(multiple_geometries)
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{
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layer_.ResetReading ();
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}
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ogr_featureset::~ogr_featureset() {}
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feature_ptr ogr_featureset::next()
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{
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ogr_feature_ptr feat (layer_.GetNextFeature());
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if ((*feat) != NULL)
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{
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OGRGeometry* geom=(*feat)->GetGeometryRef();
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if (geom != NULL)
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{
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feature_ptr feature(new Feature((*feat)->GetFID()));
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convert_geometry (geom, feature);
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int fld_count = layerdef_->GetFieldCount();
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for (int i = 0; i < fld_count; i++)
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{
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OGRFieldDefn* fld = layerdef_->GetFieldDefn (i);
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OGRFieldType type_oid = fld->GetType ();
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std_string fld_name = fld->GetNameRef ();
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switch (type_oid)
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{
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case OFTInteger:
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{
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boost::put(*feature,fld_name,(*feat)->GetFieldAsInteger (i));
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break;
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}
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case OFTReal:
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{
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boost::put(*feature,fld_name,(*feat)->GetFieldAsDouble (i));
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break;
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}
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case OFTString:
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case OFTWideString: // deprecated !
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{
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UnicodeString ustr = tr_->transcode((*feat)->GetFieldAsString (i));
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boost::put(*feature,fld_name,ustr);
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break;
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}
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case OFTIntegerList:
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case OFTRealList:
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case OFTStringList:
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case OFTWideStringList: // deprecated !
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{
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#ifdef MAPNIK_DEBUG
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clog << "unhandled type_oid=" << type_oid << endl;
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#endif
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break;
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}
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case OFTBinary:
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{
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#ifdef MAPNIK_DEBUG
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clog << "unhandled type_oid=" << type_oid << endl;
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#endif
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//boost::put(*feature,name,feat->GetFieldAsBinary (i, size));
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break;
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}
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case OFTDate:
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case OFTTime:
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case OFTDateTime: // unhandled !
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{
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#ifdef MAPNIK_DEBUG
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clog << "unhandled type_oid=" << type_oid << endl;
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#endif
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break;
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}
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default: // unknown
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{
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#ifdef MAPNIK_DEBUG
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clog << "unknown type_oid=" << type_oid << endl;
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#endif
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break;
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}
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}
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}
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return feature;
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}
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}
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return feature_ptr();
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}
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void ogr_featureset::convert_geometry (OGRGeometry* geom, feature_ptr feature)
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{
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switch (wkbFlatten (geom->getGeometryType()))
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{
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case wkbPoint:
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convert_point (static_cast<OGRPoint*>(geom), feature);
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break;
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case wkbLineString:
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convert_linestring (static_cast<OGRLineString*>(geom), feature);
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break;
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case wkbPolygon:
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convert_polygon (static_cast<OGRPolygon*>(geom), feature);
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break;
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case wkbMultiPoint:
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if (multiple_geometries_)
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convert_multipoint_2 (static_cast<OGRMultiPoint*>(geom), feature);
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else
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convert_multipoint (static_cast<OGRMultiPoint*>(geom), feature);
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break;
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case wkbMultiLineString:
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if (multiple_geometries_)
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convert_multilinestring_2 (static_cast<OGRMultiLineString*>(geom), feature);
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else
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convert_multilinestring (static_cast<OGRMultiLineString*>(geom), feature);
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break;
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case wkbMultiPolygon:
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if (multiple_geometries_)
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convert_multipolygon_2 (static_cast<OGRMultiPolygon*>(geom), feature);
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else
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convert_multipolygon (static_cast<OGRMultiPolygon*>(geom), feature);
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break;
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case wkbGeometryCollection:
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convert_collection (static_cast<OGRGeometryCollection*>(geom), feature);
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break;
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case wkbLinearRing:
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convert_linestring (static_cast<OGRLinearRing*>(geom), feature);
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break;
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case wkbNone:
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case wkbUnknown:
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default:
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#ifdef MAPNIK_DEBUG
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clog << "unknown <ogr> geometry_type=" << wkbFlatten (geom->getGeometryType()) << endl;
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#endif
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break;
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}
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}
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void ogr_featureset::convert_point (OGRPoint* geom, feature_ptr feature)
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{
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geometry2d* point = new point_impl;
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point->move_to (geom->getX(), geom->getY());
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feature->add_geometry (point);
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}
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void ogr_featureset::convert_linestring (OGRLineString* geom, feature_ptr feature)
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{
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int num_points = geom->getNumPoints ();
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geometry2d * line = new line_string_impl;
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line->set_capacity (num_points);
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line->move_to (geom->getX (0), geom->getY (0));
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for (int i=1;i<num_points;++i)
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{
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line->line_to (geom->getX (i), geom->getY (i));
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}
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feature->add_geometry (line);
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}
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void ogr_featureset::convert_polygon (OGRPolygon* geom, feature_ptr feature)
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{
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OGRLinearRing* exterior = geom->getExteriorRing ();
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int num_points = exterior->getNumPoints ();
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int num_interior = geom->getNumInteriorRings ();
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int capacity = 0;
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for (int r=0;r<num_interior;r++)
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{
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OGRLinearRing* interior = geom->getInteriorRing (r);
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capacity += interior->getNumPoints ();
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}
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geometry2d * poly = new polygon_impl;
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poly->set_capacity (num_points + capacity);
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poly->move_to (exterior->getX (0), exterior->getY (0));
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for (int i=1;i<num_points;++i)
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{
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poly->line_to (exterior->getX (i), exterior->getY (i));
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}
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for (int r=0;r<num_interior;r++)
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{
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OGRLinearRing* interior = geom->getInteriorRing (r);
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num_points = interior->getNumPoints ();
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poly->move_to(interior->getX (0), interior->getY (0));
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for (int i=1;i<num_points;++i)
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{
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poly->line_to(interior->getX (i), interior->getY (i));
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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 ogr_featureset::convert_multipoint (OGRMultiPoint* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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geometry2d* point = new point_impl;
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for (int i=0;i<num_geometries;i++)
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{
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OGRPoint* ogrpoint = static_cast<OGRPoint*>(geom->getGeometryRef (i));
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point->move_to (ogrpoint->getX(), ogrpoint->getY());
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}
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}
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void ogr_featureset::convert_multipoint_2 (OGRMultiPoint* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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for (int i=0;i<num_geometries;i++)
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{
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convert_point (static_cast<OGRPoint*>(geom->getGeometryRef (i)), feature);
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}
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}
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void ogr_featureset::convert_multilinestring (OGRMultiLineString* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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int num_points = 0;
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for (int i=0;i<num_geometries;i++)
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{
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OGRLineString* ls = static_cast<OGRLineString*>(geom->getGeometryRef (i));
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num_points += ls->getNumPoints ();
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}
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geometry2d * line = new line_string_impl;
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line->set_capacity (num_points);
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for (int i=0;i<num_geometries;i++)
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{
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OGRLineString* ls = static_cast<OGRLineString*>(geom->getGeometryRef (i));
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num_points = ls->getNumPoints ();
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line->move_to (ls->getX (0), ls->getY (0));
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for (int i=1;i<num_points;++i)
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{
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line->line_to (ls->getX (i), ls->getY (i));
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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 ogr_featureset::convert_multilinestring_2 (OGRMultiLineString* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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for (int i=0;i<num_geometries;i++)
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{
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convert_linestring (static_cast<OGRLineString*>(geom->getGeometryRef (i)), feature);
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}
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}
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void ogr_featureset::convert_multipolygon (OGRMultiPolygon* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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int capacity = 0;
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for (int i=0;i<num_geometries;i++)
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{
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OGRPolygon* p = static_cast<OGRPolygon*>(geom->getGeometryRef (i));
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OGRLinearRing* exterior = p->getExteriorRing ();
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capacity += exterior->getNumPoints ();
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for (int r=0;r<p->getNumInteriorRings ();r++)
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{
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OGRLinearRing* interior = p->getInteriorRing (r);
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capacity += interior->getNumPoints ();
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}
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}
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geometry2d * poly = new polygon_impl;
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poly->set_capacity (capacity);
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for (int i=0;i<num_geometries;i++)
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{
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OGRPolygon* p = static_cast<OGRPolygon*>(geom->getGeometryRef (i));
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OGRLinearRing* exterior = p->getExteriorRing ();
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int num_points = exterior->getNumPoints ();
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int num_interior = p->getNumInteriorRings ();
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poly->move_to (exterior->getX (0), exterior->getY (0));
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for (int i=1;i<num_points;++i)
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{
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poly->line_to (exterior->getX (i), exterior->getY (i));
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}
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for (int r=0;r<num_interior;r++)
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{
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OGRLinearRing* interior = p->getInteriorRing (r);
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num_points = interior->getNumPoints ();
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poly->move_to(interior->getX (0), interior->getY (0));
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for (int i=1;i<num_points;++i)
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{
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poly->line_to(interior->getX (i), interior->getY (i));
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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 ogr_featureset::convert_multipolygon_2 (OGRMultiPolygon* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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for (int i=0;i<num_geometries;i++)
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{
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convert_polygon (static_cast<OGRPolygon*>(geom->getGeometryRef (i)), feature);
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}
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}
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void ogr_featureset::convert_collection (OGRGeometryCollection* geom, feature_ptr feature)
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{
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int num_geometries = geom->getNumGeometries ();
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for (int i=0;i<num_geometries;i++)
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{
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OGRGeometry* g = geom->getGeometryRef (i);
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if (g != NULL)
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{
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convert_geometry (g, feature);
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}
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}
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}
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