266 lines
9.3 KiB
C++
266 lines
9.3 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) 2015 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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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/marker.hpp>
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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_converter.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/svg/svg_path_attributes.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/image_reader.hpp>
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#include <mapnik/util/fs.hpp>
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// boost
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#pragma GCC diagnostic ignored "-Wunused-local-typedef"
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#include <boost/assert.hpp>
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#include <boost/algorithm/string.hpp>
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#pragma GCC diagnostic pop
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// agg
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#include "agg_rendering_buffer.h"
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#include "agg_pixfmt_rgba.h"
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namespace mapnik
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{
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marker_cache::marker_cache()
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: known_svg_prefix_("shape://"),
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known_image_prefix_("image://")
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{
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insert_svg("ellipse",
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"<?xml version='1.0' standalone='no'?>"
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"<svg width='100%' height='100%' version='1.1' xmlns='http://www.w3.org/2000/svg'>"
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"<ellipse rx='5' ry='5' fill='#0000FF' stroke='black' stroke-width='.5'/>"
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"</svg>");
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insert_svg("arrow",
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"<?xml version='1.0' standalone='no'?>"
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"<svg width='100%' height='100%' version='1.1' xmlns='http://www.w3.org/2000/svg'>"
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"<path fill='#0000FF' stroke='black' stroke-width='.5' d='m 31.698405,7.5302648 -8.910967,-6.0263712 0.594993,4.8210971 -18.9822542,0 0,2.4105482 18.9822542,0 -0.594993,4.8210971 z'/>"
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"</svg>");
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marker_cache_.emplace("image://square",std::make_shared<mapnik::marker const>(mapnik::marker_rgba8()));
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}
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marker_cache::~marker_cache() {}
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void marker_cache::clear()
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{
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#ifdef MAPNIK_THREADSAFE
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std::lock_guard<std::mutex> lock(mutex_);
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#endif
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auto itr = marker_cache_.begin();
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while(itr != marker_cache_.end())
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{
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if (!is_uri(itr->first))
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{
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marker_cache_.erase(itr++);
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}
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else
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{
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++itr;
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}
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}
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}
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bool marker_cache::is_svg_uri(std::string const& path)
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{
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return boost::algorithm::starts_with(path,known_svg_prefix_);
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}
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bool marker_cache::is_image_uri(std::string const& path)
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{
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return boost::algorithm::starts_with(path,known_image_prefix_);
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}
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bool marker_cache::insert_svg(std::string const& name, std::string const& svg_string)
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{
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std::string key = known_svg_prefix_ + name;
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auto itr = svg_cache_.find(key);
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if (itr == svg_cache_.end())
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{
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return svg_cache_.emplace(key,svg_string).second;
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}
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return false;
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}
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bool marker_cache::insert_marker(std::string const& uri, mapnik::marker && path)
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{
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#ifdef MAPNIK_THREADSAFE
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std::lock_guard<std::mutex> lock(mutex_);
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#endif
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return marker_cache_.emplace(uri,std::make_shared<mapnik::marker const>(std::move(path))).second;
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}
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namespace detail
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{
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struct visitor_create_marker
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{
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marker operator() (image_rgba8 & data)
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{
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mapnik::premultiply_alpha(data);
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return mapnik::marker(mapnik::marker_rgba8(data));
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}
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marker operator() (image_null &)
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{
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throw std::runtime_error("Can not make marker from null image data type");
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}
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template <typename T>
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marker operator() (T &)
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{
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throw std::runtime_error("Can not make marker from this data type");
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}
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};
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} // end detail ns
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std::shared_ptr<mapnik::marker const> marker_cache::find(std::string const& uri,
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bool update_cache)
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{
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if (uri.empty())
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{
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return std::make_shared<mapnik::marker const>(mapnik::marker_null());
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}
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#ifdef MAPNIK_THREADSAFE
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std::lock_guard<std::mutex> lock(mutex_);
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#endif
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auto itr = marker_cache_.find(uri);
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if (itr != marker_cache_.end())
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{
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return itr->second;
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}
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try
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{
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// if uri references a built-in marker
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if (is_svg_uri(uri))
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{
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auto mark_itr = svg_cache_.find(uri);
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if (mark_itr == svg_cache_.end())
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{
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MAPNIK_LOG_ERROR(marker_cache) << "Marker does not exist: " << uri;
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return std::make_shared<mapnik::marker const>(mapnik::marker_null());
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}
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std::string known_svg_string = mark_itr->second;
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using namespace mapnik::svg;
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svg_path_ptr marker_path(std::make_shared<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_from_string(known_svg_string);
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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_path->set_dimensions(svg.width(),svg.height());
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if (update_cache)
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{
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auto emplace_result = marker_cache_.emplace(uri,std::make_shared<mapnik::marker const>(mapnik::marker_svg(marker_path)));
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return emplace_result.first->second;
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}
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else
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{
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return std::make_shared<mapnik::marker const>(mapnik::marker_svg(marker_path));
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}
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}
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// otherwise assume file-based
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else
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{
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if (!mapnik::util::exists(uri))
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{
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MAPNIK_LOG_ERROR(marker_cache) << "Marker does not exist: " << uri;
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return std::make_shared<mapnik::marker const>(mapnik::marker_null());
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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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svg_path_ptr marker_path(std::make_shared<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_path->set_dimensions(svg.width(),svg.height());
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if (update_cache)
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{
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auto emplace_result = marker_cache_.emplace(uri,std::make_shared<mapnik::marker const>(mapnik::marker_svg(marker_path)));
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return emplace_result.first->second;
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}
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else
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{
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return std::make_shared<mapnik::marker const>(mapnik::marker_svg(marker_path));
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}
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}
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else
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{
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// TODO - support reading images from string
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std::unique_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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image_any im = reader->read(0,0,width,height);
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if (update_cache)
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{
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auto emplace_result = marker_cache_.emplace(uri,
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std::make_shared<mapnik::marker const>(
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util::apply_visitor(detail::visitor_create_marker(), im)
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));
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return emplace_result.first->second;
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}
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else
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{
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return std::make_shared<mapnik::marker const>(
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util::apply_visitor(detail::visitor_create_marker(), im)
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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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MAPNIK_LOG_ERROR(marker_cache) << "could not intialize reader for: '" << uri << "'";
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return std::make_shared<mapnik::marker const>(mapnik::marker_null());
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}
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}
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}
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}
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catch (std::exception const& ex)
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{
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MAPNIK_LOG_ERROR(marker_cache) << "Exception caught while loading: '" << uri << "' (" << ex.what() << ")";
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}
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return std::make_shared<mapnik::marker const>(mapnik::marker_null());
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}
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}
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