61 lines
1.8 KiB
C++
61 lines
1.8 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) 2015 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_AGG_HELPERS_HPP
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#define MAPNIK_AGG_HELPERS_HPP
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// mapnik
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#include <mapnik/symbolizer_enumerations.hpp>
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// agg
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#include "agg_gamma_functions.h"
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namespace mapnik {
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template <typename T>
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void set_gamma_method(T & ras_ptr, double gamma, gamma_method_enum method)
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{
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switch (method)
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{
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case GAMMA_POWER:
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ras_ptr->gamma(agg::gamma_power(gamma));
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break;
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case GAMMA_LINEAR:
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ras_ptr->gamma(agg::gamma_linear(0.0, gamma));
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break;
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case GAMMA_NONE:
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ras_ptr->gamma(agg::gamma_none());
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break;
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case GAMMA_THRESHOLD:
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ras_ptr->gamma(agg::gamma_threshold(gamma));
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break;
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case GAMMA_MULTIPLY:
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ras_ptr->gamma(agg::gamma_multiply(gamma));
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break;
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default:
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ras_ptr->gamma(agg::gamma_power(gamma));
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}
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}
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}
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#endif // MAPNIK_AGG_HELPERS_HPP
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