61 lines
2 KiB
C++
61 lines
2 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2007 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
|
|
*
|
|
*****************************************************************************/
|
|
//$Id$
|
|
|
|
#ifndef GDAL_FEATURESET_HPP
|
|
#define GDAL_FEATURESET_HPP
|
|
|
|
#include <mapnik/datasource.hpp>
|
|
#include <boost/variant.hpp>
|
|
|
|
class GDALDataset;
|
|
class GDALRasterBand;
|
|
|
|
typedef boost::variant<mapnik::query,mapnik::coord2d> gdal_query;
|
|
|
|
class gdal_featureset : public mapnik::Featureset
|
|
{
|
|
public:
|
|
|
|
gdal_featureset(GDALDataset & dataset, int band, gdal_query q,
|
|
mapnik::box2d<double> extent, double width, double height, int nbands,
|
|
double dx, double dy, double filter_factor);
|
|
virtual ~gdal_featureset();
|
|
mapnik::feature_ptr next();
|
|
private:
|
|
mapnik::feature_ptr get_feature(mapnik::query const& q);
|
|
mapnik::feature_ptr get_feature_at_point(mapnik::coord2d const& p);
|
|
void get_overview_meta(GDALRasterBand * band);
|
|
GDALDataset & dataset_;
|
|
int band_;
|
|
gdal_query gquery_;
|
|
mapnik::box2d<double> raster_extent_;
|
|
unsigned raster_width_;
|
|
unsigned raster_height_;
|
|
double dx_;
|
|
double dy_;
|
|
int nbands_;
|
|
double filter_factor_;
|
|
bool first_;
|
|
};
|
|
|
|
#endif // GDAL_FEATURESET_HPP
|