92 lines
3 KiB
C++
92 lines
3 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) 2021 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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#ifndef MAPNIK_IMAGE_SCALING_HPP
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#define MAPNIK_IMAGE_SCALING_HPP
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// mapnik
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#include <mapnik/config.hpp>
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#include <mapnik/image.hpp>
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// stl
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#include <iosfwd>
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#include <mapnik/warning.hpp>
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MAPNIK_DISABLE_WARNING_PUSH
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#include <mapnik/warning_ignore.hpp>
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#include <boost/optional.hpp>
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MAPNIK_DISABLE_WARNING_POP
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namespace mapnik
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{
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enum scaling_method_e
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{
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SCALING_NEAR=0,
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SCALING_BILINEAR,
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SCALING_BICUBIC,
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SCALING_SPLINE16,
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SCALING_SPLINE36,
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SCALING_HANNING,
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SCALING_HAMMING,
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SCALING_HERMITE,
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SCALING_KAISER,
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SCALING_QUADRIC,
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SCALING_CATROM,
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SCALING_GAUSSIAN,
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SCALING_BESSEL,
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SCALING_MITCHELL,
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SCALING_SINC,
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SCALING_LANCZOS,
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SCALING_BLACKMAN
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};
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MAPNIK_DECL boost::optional<scaling_method_e> scaling_method_from_string(std::string const& name);
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MAPNIK_DECL boost::optional<std::string> scaling_method_to_string(scaling_method_e scaling_method);
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template <typename T>
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MAPNIK_DECL void scale_image_agg(T & target, T const& source,
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scaling_method_e scaling_method,
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double image_ratio_x,
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double image_ratio_y,
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double x_off_f,
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double y_off_f,
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double filter_factor,
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boost::optional<double> const & nodata_value);
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template <typename T>
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inline void scale_image_agg(T & target, T const& source,
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scaling_method_e scaling_method,
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double image_ratio_x,
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double image_ratio_y,
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double x_off_f,
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double y_off_f,
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double filter_factor)
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{
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scale_image_agg(target, source, scaling_method,
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image_ratio_x,image_ratio_y,
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x_off_f, y_off_f, filter_factor,
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boost::optional<double>());
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}
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}
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#endif // MAPNIK_IMAGE_SCALING_HPP
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