f1393cc019
bool hit_test(double x, double y, double tol);
2. added image_view(unsigned x, unsigned y, unsigned width, unsigned height)
allowing to select region from image data e.g (in Python):
im = Image(2048,2048)
view = im.view(0,0,256,256)
save_to_file(filename,type, view)
3. changed envelope method to return vy value in datasource classes
4. features_at_point impl for shape and postgis plug-ins
99 lines
2.7 KiB
C++
99 lines
2.7 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) 2006 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: raster_datasource.cc 44 2005-04-22 18:53:54Z pavlenko $
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// boost
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#include <boost/lexical_cast.hpp>
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// mapnik
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#include <mapnik/image_reader.hpp>
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#include "raster_featureset.hpp"
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#include "raster_info.hpp"
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#include "raster_datasource.hpp"
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DATASOURCE_PLUGIN(raster_datasource)
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using std::clog;
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using std::endl;
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using boost::lexical_cast;
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using boost::bad_lexical_cast;
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raster_datasource::raster_datasource(const parameters& params)
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: datasource (params),
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desc_(params.get("name"))
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{
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filename_=params.get("file");
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format_=params.get("format");
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try
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{
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double lox=lexical_cast<double>(params.get("lox"));
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double loy=lexical_cast<double>(params.get("loy"));
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double hix=lexical_cast<double>(params.get("hix"));
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double hiy=lexical_cast<double>(params.get("hiy"));
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extent_.init(lox,loy,hix,hiy);
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}
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catch (bad_lexical_cast& ex)
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{
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clog << ex.what() << endl;
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}
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}
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raster_datasource::~raster_datasource()
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{
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}
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int raster_datasource::type() const
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{
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return datasource::Raster;
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}
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std::string raster_datasource::name_="raster";
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std::string raster_datasource::name()
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{
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return name_;
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}
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mapnik::Envelope<double> raster_datasource::envelope() const
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{
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return extent_;
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}
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layer_descriptor raster_datasource::get_descriptor() const
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{
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return desc_;
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}
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featureset_ptr raster_datasource::features(query const& q) const
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{
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raster_info info(filename_,format_,extent_);
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single_file_policy policy(info); //todo: handle different policies!
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return featureset_ptr(new raster_featureset<single_file_policy>(policy,q));
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}
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featureset_ptr raster_datasource::features_at_point(coord2d const&) const
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{
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return featureset_ptr();
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}
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