138 lines
4.4 KiB
C++
138 lines
4.4 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) 2011 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/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_path_adapter.hpp>
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#include <mapnik/svg/svg_converter.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/image_reader.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, marker_ptr> marker_cache::cache_;
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bool marker_cache::insert (std::string const& uri, marker_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<marker_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, marker_ptr>::const_iterator iterator_type;
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boost::optional<marker_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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if (is_svg(uri))
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{
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using namespace mapnik::svg;
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try
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{
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path_ptr marker_path(new svg_storage_type);
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vertex_stl_adapter<svg_path_storage> stl_storage(marker_path->source());
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svg_path_adapter svg_path(stl_storage);
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svg_converter_type svg(svg_path, marker_path->attributes());
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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);
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marker_path->set_bounding_box(lox,loy,hix,hiy);
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marker_ptr mark(new marker(marker_path));
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result.reset(mark);
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if (update_cache)
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{
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cache_.insert(std::make_pair(uri,*result));
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}
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return result;
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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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try
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{
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std::auto_ptr<mapnik::image_reader> reader(mapnik::get_image_reader(uri));
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if (reader.get())
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{
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unsigned width = reader->width();
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unsigned height = reader->height();
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BOOST_ASSERT(width > 0 && height > 0);
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mapnik::image_ptr image(new mapnik::image_data_32(width,height));
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reader->read(0,0,*image);
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marker_ptr mark(new marker(image));
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result.reset(mark);
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if (update_cache)
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{
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cache_.insert(std::make_pair(uri,*result));
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}
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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 image: " << uri << std::endl;
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}
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}
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}
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else
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{
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std::cerr << "### WARNING Marker 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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