/usr/include/mapnik/image_scaling.hpp is in libmapnik-dev 2.2.0+ds1-6build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* 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_IMAGE_SCALING_HPP
#define MAPNIK_IMAGE_SCALING_HPP
// stl
#include <string>
#include <boost/optional.hpp>
#include <mapnik/config.hpp>
namespace mapnik
{
enum scaling_method_e
{
SCALING_NEAR=0,
SCALING_BILINEAR,
SCALING_BICUBIC,
SCALING_SPLINE16,
SCALING_SPLINE36,
SCALING_HANNING,
SCALING_HAMMING,
SCALING_HERMITE,
SCALING_KAISER,
SCALING_QUADRIC,
SCALING_CATROM,
SCALING_GAUSSIAN,
SCALING_BESSEL,
SCALING_MITCHELL,
SCALING_SINC,
SCALING_LANCZOS,
SCALING_BLACKMAN,
SCALING_BILINEAR8
};
boost::optional<scaling_method_e> scaling_method_from_string(std::string const& name);
boost::optional<std::string> scaling_method_to_string(scaling_method_e scaling_method);
template <typename Image>
void scale_image_agg(Image & target,
Image const& source,
scaling_method_e scaling_method,
double image_ratio_x,
double image_ratio_y,
double x_off_f=0,
double y_off_f=0,
double filter_radius=2);
template <typename Image>
void scale_image_bilinear_old(Image & target,
Image const& source,
double x_off_f=0,
double y_off_f=0);
template <typename Image>
void scale_image_bilinear8(Image & target,
Image const& source,
double x_off_f=0,
double y_off_f=0);
}
#endif // MAPNIK_IMAGE_SCALING_HPP
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