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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2021 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
*
*****************************************************************************
*
* Initially developed by Sandro Santilli <strk@keybit.net> for CartoDB
*
*****************************************************************************/
#ifndef PGRASTER_FEATURESET_HPP
#define PGRASTER_FEATURESET_HPP
// mapnik
#include <mapnik/box2d.hpp>
#include <mapnik/datasource.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/unicode.hpp>
// stl
#include <memory>
using mapnik::Featureset;
using mapnik::box2d;
using mapnik::feature_ptr;
using mapnik::raster_ptr;
using mapnik::transcoder;
using mapnik::context_ptr;
class IResultSet;
class pgraster_featureset : public mapnik::Featureset
{
public:
/// @param bandno band number (1-based). 0 (default) reads all bands.
/// Anything else forces interpretation of colors off
/// (values copied verbatim)
pgraster_featureset(std::shared_ptr<IResultSet> const& rs,
context_ptr const& ctx,
std::string const& encoding,
bool key_field = false,
int bandno = 0);
feature_ptr next();
~pgraster_featureset();
private:
std::shared_ptr<IResultSet> rs_;
context_ptr ctx_;
const std::unique_ptr<mapnik::transcoder> tr_;
mapnik::value_integer feature_id_;
bool key_field_;
int band_;
};
#endif // PGRASTER_FEATURESET_HPP
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