103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#ifndef MAPNIK_MEMORY_FEATURESET_HPP
|
|
#define MAPNIK_MEMORY_FEATURESET_HPP
|
|
|
|
// mapnik
|
|
#include <mapnik/box2d.hpp>
|
|
#include <mapnik/geometry.hpp>
|
|
#include <mapnik/datasource.hpp>
|
|
#include <mapnik/memory_datasource.hpp>
|
|
#include <mapnik/feature.hpp>
|
|
#include <mapnik/raster.hpp>
|
|
|
|
#include <deque>
|
|
|
|
namespace mapnik {
|
|
|
|
class memory_featureset : public Featureset
|
|
{
|
|
public:
|
|
memory_featureset(box2d<double> const& bbox, memory_datasource const& ds, bool bbox_check = true)
|
|
: bbox_(bbox),
|
|
pos_(ds.features_.begin()),
|
|
end_(ds.features_.end()),
|
|
type_(ds.type()),
|
|
bbox_check_(bbox_check)
|
|
{}
|
|
|
|
memory_featureset(box2d<double> const& bbox, std::deque<feature_ptr> const& features, bool bbox_check = true)
|
|
: bbox_(bbox),
|
|
pos_(features.begin()),
|
|
end_(features.end()),
|
|
type_(datasource::Vector),
|
|
bbox_check_(bbox_check)
|
|
{}
|
|
|
|
virtual ~memory_featureset() {}
|
|
|
|
feature_ptr next()
|
|
{
|
|
while (pos_ != end_)
|
|
{
|
|
if (!bbox_check_)
|
|
{
|
|
return *pos_++;
|
|
}
|
|
else
|
|
{
|
|
if (type_ == datasource::Raster)
|
|
{
|
|
raster_ptr const& source = (*pos_)->get_raster();
|
|
if (source && bbox_.intersects(source->ext_))
|
|
{
|
|
return *pos_++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (std::size_t i=0; i<(*pos_)->num_geometries();++i)
|
|
{
|
|
geometry_type & geom = (*pos_)->get_geometry(i);
|
|
if (bbox_.intersects(geom.envelope()))
|
|
{
|
|
return *pos_++;
|
|
}
|
|
}
|
|
}
|
|
++pos_;
|
|
}
|
|
}
|
|
return feature_ptr();
|
|
}
|
|
|
|
private:
|
|
box2d<double> bbox_;
|
|
std::deque<feature_ptr>::const_iterator pos_;
|
|
std::deque<feature_ptr>::const_iterator end_;
|
|
datasource::datasource_t type_;
|
|
bool bbox_check_;
|
|
};
|
|
}
|
|
|
|
#endif // MAPNIK_MEMORY_FEATURESET_HPP
|