72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
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* Copyright (C) 2005 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//$Id: image_symbolizer.hpp 39 2005-04-10 20:39:53Z pavlenko $
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#ifndef IMAGE_SYMBOLIZER_HPP
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#define IMAGE_SYMBOLIZER_HPP
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#include "symbolizer.hpp"
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#include "image_data.hpp"
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#include <boost/utility.hpp>
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namespace mapnik
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{
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struct image_symbolizer : public symbolizer,
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private boost::noncopyable
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{
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private:
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ImageData32 symbol_;
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public:
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image_symbolizer(std::string const& file,
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std::string const& type,
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unsigned width,unsigned height)
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: symbolizer(),
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symbol_(width,height)
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{
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try
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{
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std::auto_ptr<ImageReader> reader(get_image_reader(type,file));
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reader->read(0,0,symbol_);
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}
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catch (...)
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{
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std::cerr<<"exception caught..."<<std::endl;
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}
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}
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virtual ~image_symbolizer() {}
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void render(geometry_type& geom,Image32& image) const
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{
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int w=symbol_.width();
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int h=symbol_.height();
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double x,y;
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unsigned size = geom.num_points();
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for (unsigned pos = 0; pos < size ;++pos)
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{
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geom.vertex(&x,&y);
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int px=int(x - 0.5 * w);
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int py=int(y - 0.5 * h);
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image.set_rectangle_alpha(px,py,symbol_);
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}
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}
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};
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}
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#endif // IMAGE_SYMBOLIZER_HPP
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