c500451cd8
to facilitate multi-threading:
* SVG data (todo: enforce const)
* SVG parsing/reading mutable
* SVG rendering (read-only access to the data)
99 lines
2.9 KiB
C++
99 lines
2.9 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) 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/svg_parser.hpp>
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#include <mapnik/svg/svg_storage.hpp>
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#include <mapnik/svg/svg_converter.hpp>
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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 svg_storage_type);
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svg::svg_converter_type svg(marker->source(),marker->attributes());
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svg::svg_parser p(svg);
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p.parse(uri);
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svg.arrange_orientations();
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double lox,loy,hix,hiy;
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svg.bounding_rect(&lox, &loy, &hix, &hiy); //TODO: store bbox!
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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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return marker;
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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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