94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
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/*****************************************************************************
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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) 2010 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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// mapnik
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#include <mapnik/svg/marker_cache.hpp>
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#include <mapnik/svg/agg_svg_parser.h>
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// boost
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#include <boost/assert.hpp>
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#include <boost/filesystem/operations.hpp>
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#include <boost/algorithm/string.hpp>
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namespace mapnik
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{
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boost::unordered_map<std::string, path_ptr> marker_cache::cache_;
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bool marker_cache::insert (std::string const& uri, path_ptr path)
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{
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#ifdef MAPNIK_THREADSAFE
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mutex::scoped_lock lock(mutex_);
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#endif
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return cache_.insert(std::make_pair(uri,path)).second;
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}
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boost::optional<path_ptr> marker_cache::find(std::string const& uri, bool update_cache)
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{
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#ifdef MAPNIK_THREADSAFE
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mutex::scoped_lock lock(mutex_);
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#endif
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typedef boost::unordered_map<std::string, path_ptr>::const_iterator iterator_type;
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boost::optional<path_ptr> result;
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iterator_type itr = cache_.find(uri);
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if (itr != cache_.end())
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{
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result.reset(itr->second);
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return result;
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}
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// we can't find marker in cache, lets try to load it from filesystem
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boost::filesystem::path path(uri);
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if (exists(path))
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{
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try
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{
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mapnik::path_ptr marker(new agg::svg::path_renderer);
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agg::svg::parser p(*marker);
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marker->arrange_orientations();
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p.parse(uri.c_str());
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//marker->bounding_rect(&lox, &loy, &hix, &hiy);
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if (update_cache)
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{
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cache_.insert(std::make_pair(uri,marker));
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}
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}
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catch (...)
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{
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std::cerr << "Exception caught while loading SVG: " << uri << std::endl;
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}
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}
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else
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{
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std::cerr << "### WARNING SVG does not exist: " << uri << std::endl;
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}
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return result;
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}
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#ifdef MAPNIK_THREADSAFE
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boost::mutex marker_cache::mutex_;
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#endif
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}
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