154 lines
4.3 KiB
C++
154 lines
4.3 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) 2006 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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//$Id$
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#ifndef RASTER_SYMBOLIZER_HPP
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#define RASTER_SYMBOLIZER_HPP
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// mapnik
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#include <mapnik/config.hpp>
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#include <mapnik/raster_colorizer.hpp>
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#include <mapnik/symbolizer.hpp>
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#include <mapnik/image_util.hpp>
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// boost
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#include <boost/shared_ptr.hpp>
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namespace mapnik
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{
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struct MAPNIK_DECL raster_symbolizer : public symbolizer_base
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{
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raster_symbolizer()
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: symbolizer_base(),
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mode_("normal"),
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scaling_("fast"),
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opacity_(1.0),
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colorizer_(),
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filter_factor_(-1) {}
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raster_symbolizer(const raster_symbolizer &rhs)
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: symbolizer_base(rhs),
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mode_(rhs.get_mode()),
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scaling_(rhs.get_scaling()),
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opacity_(rhs.get_opacity()),
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colorizer_(rhs.colorizer_),
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filter_factor_(rhs.filter_factor_) {}
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std::string const& get_mode() const
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{
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return mode_;
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}
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void set_mode(std::string const& mode)
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{
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mode_ = mode;
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}
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std::string const& get_scaling() const
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{
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return scaling_;
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}
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void set_scaling(std::string const& scaling)
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{
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scaling_ = scaling;
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}
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void set_opacity(float opacity)
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{
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opacity_ = opacity;
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}
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float get_opacity() const
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{
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return opacity_;
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}
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raster_colorizer_ptr get_colorizer() const
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{
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return colorizer_;
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}
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void set_colorizer(raster_colorizer_ptr const& colorizer)
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{
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colorizer_ = colorizer;
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}
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double get_filter_factor() const
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{
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return filter_factor_;
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}
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void set_filter_factor(double filter_factor)
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{
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filter_factor_=filter_factor;
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}
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double calculate_filter_factor() const
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{
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if (filter_factor_ > 0)
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{
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// respect explicitly specified values
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return filter_factor_;
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} else {
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// No filter factor specified, calculate a sensible default value
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// based on the scaling algorithm being employed.
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scaling_method_e scaling = get_scaling_method_by_name (scaling_);
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double ff = 1.0;
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switch(scaling)
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{
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case SCALING_NEAR:
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ff = 1.0;
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break;
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// TODO potentially some of these algorithms would use filter_factor >2.0.
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// Contributions welcome from someone who knows more about them.
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case SCALING_BILINEAR:
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case SCALING_BICUBIC:
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case SCALING_SPLINE16:
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case SCALING_SPLINE36:
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case SCALING_HANNING:
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case SCALING_HAMMING:
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case SCALING_HERMITE:
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case SCALING_KAISER:
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case SCALING_QUADRIC:
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case SCALING_CATROM:
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case SCALING_GAUSSIAN:
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case SCALING_BESSEL:
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case SCALING_MITCHELL:
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case SCALING_SINC:
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case SCALING_LANCZOS:
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case SCALING_BLACKMAN:
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ff = 2.0;
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break;
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default:
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ff = 1.0;
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break;
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}
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return ff;
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}
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}
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private:
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std::string mode_;
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std::string scaling_;
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float opacity_;
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raster_colorizer_ptr colorizer_;
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double filter_factor_;
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};
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}
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#endif //RASTER_SYMBOLIZER_HPP
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