702 lines
18 KiB
C++
702 lines
18 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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//mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/map.hpp>
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#include <mapnik/datasource.hpp>
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#include <mapnik/projection.hpp>
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#include <mapnik/filter_featureset.hpp>
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#include <mapnik/hit_test_filter.hpp>
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#include <mapnik/scale_denominator.hpp>
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#include <mapnik/config_error.hpp>
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#include <mapnik/config.hpp> // for PROJ_ENVELOPE_POINTS
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// boost
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#include <boost/make_shared.hpp>
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// icu
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#include <unicode/uversion.h>
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namespace mapnik
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{
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/** Call cache_metawriters for each symbolizer.*/
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struct metawriter_cache_dispatch : public boost::static_visitor<>
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{
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metawriter_cache_dispatch (Map const &m) : m_(m) {}
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template <typename T> void operator () (T &sym) const
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{
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sym.cache_metawriters(m_);
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}
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Map const &m_;
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};
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static const char * aspect_fix_mode_strings[] = {
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"GROW_BBOX",
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"GROW_CANVAS",
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"SHRINK_BBOX",
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"SHRINK_CANVAS",
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"ADJUST_BBOX_WIDTH",
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"ADJUST_BBOX_HEIGHT",
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"ADJUST_CANVAS_WIDTH",
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"ADJUST_CANVAS_HEIGHT",
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""
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};
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IMPLEMENT_ENUM( aspect_fix_mode_e, aspect_fix_mode_strings )
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Map::Map()
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: width_(400),
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height_(400),
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srs_("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"),
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buffer_size_(0),
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aspectFixMode_(GROW_BBOX),
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base_path_("") {}
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Map::Map(int width,int height, std::string const& srs)
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: width_(width),
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height_(height),
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srs_(srs),
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buffer_size_(0),
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aspectFixMode_(GROW_BBOX),
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base_path_("") {}
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Map::Map(const Map& rhs)
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: width_(rhs.width_),
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height_(rhs.height_),
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srs_(rhs.srs_),
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buffer_size_(rhs.buffer_size_),
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background_(rhs.background_),
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background_image_(rhs.background_image_),
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styles_(rhs.styles_),
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metawriters_(rhs.metawriters_),
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fontsets_(rhs.fontsets_),
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layers_(rhs.layers_),
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aspectFixMode_(rhs.aspectFixMode_),
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current_extent_(rhs.current_extent_),
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maximum_extent_(rhs.maximum_extent_),
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base_path_(rhs.base_path_),
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extra_params_(rhs.extra_params_) {}
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Map& Map::operator=(const Map& rhs)
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{
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if (this==&rhs) return *this;
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width_=rhs.width_;
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height_=rhs.height_;
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srs_=rhs.srs_;
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buffer_size_ = rhs.buffer_size_;
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background_=rhs.background_;
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background_image_=rhs.background_image_;
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styles_=rhs.styles_;
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metawriters_ = rhs.metawriters_;
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fontsets_ = rhs.fontsets_;
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layers_=rhs.layers_;
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aspectFixMode_=rhs.aspectFixMode_;
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maximum_extent_=rhs.maximum_extent_;
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base_path_=rhs.base_path_;
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extra_params_=rhs.extra_params_;
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return *this;
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}
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std::map<std::string,feature_type_style> const& Map::styles() const
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{
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return styles_;
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}
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std::map<std::string,feature_type_style> & Map::styles()
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{
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return styles_;
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}
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Map::style_iterator Map::begin_styles()
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{
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return styles_.begin();
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}
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Map::style_iterator Map::end_styles()
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{
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return styles_.end();
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}
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Map::const_style_iterator Map::begin_styles() const
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{
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return styles_.begin();
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}
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Map::const_style_iterator Map::end_styles() const
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{
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return styles_.end();
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}
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bool Map::insert_style(std::string const& name,feature_type_style const& style)
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{
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return styles_.insert(make_pair(name,style)).second;
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}
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void Map::remove_style(std::string const& name)
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{
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styles_.erase(name);
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}
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boost::optional<feature_type_style const&> Map::find_style(std::string const& name) const
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{
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std::map<std::string,feature_type_style>::const_iterator itr = styles_.find(name);
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if (itr != styles_.end())
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return boost::optional<feature_type_style const&>(itr->second);
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else
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return boost::optional<feature_type_style const&>() ;
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}
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bool Map::insert_metawriter(std::string const& name, metawriter_ptr const& writer)
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{
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return metawriters_.insert(make_pair(name, writer)).second;
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}
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void Map::remove_metawriter(std::string const& name)
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{
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metawriters_.erase(name);
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}
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metawriter_ptr Map::find_metawriter(std::string const& name) const
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{
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std::map<std::string, metawriter_ptr>::const_iterator itr = metawriters_.find(name);
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if (itr != metawriters_.end())
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return itr->second;
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else
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return metawriter_ptr();
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}
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std::map<std::string,metawriter_ptr> const& Map::metawriters() const
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{
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return metawriters_;
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}
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Map::const_metawriter_iterator Map::begin_metawriters() const
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{
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return metawriters_.begin();
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}
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Map::const_metawriter_iterator Map::end_metawriters() const
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{
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return metawriters_.end();
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}
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bool Map::insert_fontset(std::string const& name, font_set const& fontset)
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{
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return fontsets_.insert(make_pair(name, fontset)).second;
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}
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boost::optional<font_set const&> Map::find_fontset(std::string const& name) const
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{
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std::map<std::string,font_set>::const_iterator itr = fontsets_.find(name);
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if (itr != fontsets_.end())
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return boost::optional<font_set const&>(itr->second);
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else
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return boost::optional<font_set const&>() ;
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}
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std::map<std::string,font_set> const& Map::fontsets() const
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{
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return fontsets_;
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}
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std::map<std::string,font_set> & Map::fontsets()
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{
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return fontsets_;
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}
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size_t Map::layer_count() const
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{
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return layers_.size();
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}
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void Map::addLayer(const layer& l)
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{
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layers_.push_back(l);
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}
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void Map::removeLayer(size_t index)
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{
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layers_.erase(layers_.begin()+index);
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}
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void Map::remove_all()
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{
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layers_.clear();
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styles_.clear();
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metawriters_.clear();
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}
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const layer& Map::getLayer(size_t index) const
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{
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return layers_[index];
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}
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layer& Map::getLayer(size_t index)
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{
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return layers_[index];
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}
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std::vector<layer> const& Map::layers() const
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{
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return layers_;
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}
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std::vector<layer> & Map::layers()
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{
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return layers_;
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}
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unsigned Map::width() const
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{
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return width_;
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}
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unsigned Map::height() const
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{
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return height_;
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}
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void Map::set_width(unsigned width)
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{
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if (width >= MIN_MAPSIZE && width <= MAX_MAPSIZE)
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{
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width_=width;
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fixAspectRatio();
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}
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}
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void Map::set_height(unsigned height)
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{
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if (height >= MIN_MAPSIZE && height <= MAX_MAPSIZE)
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{
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height_=height;
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fixAspectRatio();
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}
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}
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void Map::resize(unsigned width,unsigned height)
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{
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if (width >= MIN_MAPSIZE && width <= MAX_MAPSIZE &&
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height >= MIN_MAPSIZE && height <= MAX_MAPSIZE)
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{
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width_=width;
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height_=height;
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fixAspectRatio();
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}
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}
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std::string const& Map::srs() const
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{
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return srs_;
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}
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void Map::set_srs(std::string const& srs)
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{
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srs_ = srs;
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}
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void Map::set_buffer_size( int buffer_size)
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{
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buffer_size_ = buffer_size;
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}
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int Map::buffer_size() const
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{
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return buffer_size_;
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}
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boost::optional<color> const& Map::background() const
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{
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return background_;
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}
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void Map::set_background(const color& c)
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{
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background_ = c;
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}
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boost::optional<std::string> const& Map::background_image() const
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{
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return background_image_;
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}
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void Map::set_background_image(std::string const& image_filename)
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{
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background_image_ = image_filename;
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}
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void Map::set_maximum_extent(box2d<double> const& box)
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{
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maximum_extent_ = box;
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}
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boost::optional<box2d<double> > const& Map::maximum_extent() const
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{
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return maximum_extent_;
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}
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boost::optional<box2d<double> > & Map::maximum_extent()
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{
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return maximum_extent_;
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}
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std::string const& Map::base_path() const
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{
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return base_path_;
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}
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void Map::set_base_path(std::string const& base)
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{
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base_path_ = base;
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}
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void Map::zoom(double factor)
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{
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coord2d center = current_extent_.center();
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double w = factor * current_extent_.width();
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double h = factor * current_extent_.height();
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current_extent_ = box2d<double>(center.x - 0.5 * w,
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center.y - 0.5 * h,
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center.x + 0.5 * w,
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center.y + 0.5 * h);
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fixAspectRatio();
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}
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void Map::zoom_all()
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{
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if (maximum_extent_) {
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zoom_to_box(*maximum_extent_);
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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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if (!layers_.size() > 0)
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return;
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projection proj0(srs_);
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box2d<double> ext;
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bool success = false;
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bool first = true;
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std::vector<layer>::const_iterator itr = layers_.begin();
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std::vector<layer>::const_iterator end = layers_.end();
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while (itr != end)
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{
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if (itr->active())
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{
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std::string const& layer_srs = itr->srs();
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projection proj1(layer_srs);
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proj_transform prj_trans(proj0,proj1);
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box2d<double> layer_ext = itr->envelope();
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if (prj_trans.backward(layer_ext, PROJ_ENVELOPE_POINTS))
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{
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success = true;
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#ifdef MAPNIK_LOG
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mapnik::log() << "map: Layer " << itr->name() << " original ext=" << itr->envelope();
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mapnik::log() << "map: Layer " << itr->name() << " transformed to map srs=" << layer_ext;
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#endif
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if (first)
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{
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ext = layer_ext;
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first = false;
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}
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else
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{
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ext.expand_to_include(layer_ext);
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}
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}
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}
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++itr;
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}
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if (success) {
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zoom_to_box(ext);
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} else {
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std::ostringstream s;
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s << "could not zoom to combined layer extents "
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<< "using zoom_all because proj4 could not "
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<< "back project any layer extents into the map srs "
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<< "(set map 'maximum-extent' to override layer extents)";
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throw std::runtime_error(s.str());
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}
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}
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catch (proj_init_error & ex)
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{
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throw mapnik::config_error(std::string("Projection error during map.zoom_all: ") + ex.what());
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}
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}
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}
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void Map::zoom_to_box(const box2d<double> &box)
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{
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current_extent_=box;
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fixAspectRatio();
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}
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void Map::fixAspectRatio()
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{
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if (current_extent_.width() > 0 && current_extent_.height() > 0)
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{
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double ratio1 = static_cast<double>(width_) / static_cast<double>(height_);
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double ratio2 = current_extent_.width() / current_extent_.height();
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if (ratio1 == ratio2) return;
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switch(aspectFixMode_)
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{
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case ADJUST_BBOX_HEIGHT:
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current_extent_.height(current_extent_.width() / ratio1);
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break;
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case ADJUST_BBOX_WIDTH:
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current_extent_.width(current_extent_.height() * ratio1);
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break;
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case ADJUST_CANVAS_HEIGHT:
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height_ = int (width_ / ratio2 + 0.5);
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break;
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case ADJUST_CANVAS_WIDTH:
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width_ = int (height_ * ratio2 + 0.5);
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break;
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case GROW_BBOX:
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if (ratio2 > ratio1)
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current_extent_.height(current_extent_.width() / ratio1);
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else
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current_extent_.width(current_extent_.height() * ratio1);
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break;
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case SHRINK_BBOX:
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if (ratio2 < ratio1)
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current_extent_.height(current_extent_.width() / ratio1);
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else
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current_extent_.width(current_extent_.height() * ratio1);
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break;
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case GROW_CANVAS:
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if (ratio2 > ratio1)
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width_ = static_cast<int>(height_ * ratio2 + 0.5);
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else
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height_ = int (width_ / ratio2 + 0.5);
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break;
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case SHRINK_CANVAS:
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if (ratio2 > ratio1)
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height_ = int (width_ / ratio2 + 0.5);
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else
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width_ = static_cast<int>(height_ * ratio2 + 0.5);
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break;
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default:
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if (ratio2 > ratio1)
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current_extent_.height(current_extent_.width() / ratio1);
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else
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current_extent_.width(current_extent_.height() * ratio1);
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break;
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}
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}
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}
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const box2d<double>& Map::get_current_extent() const
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{
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return current_extent_;
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}
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box2d<double> Map::get_buffered_extent() const
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{
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double extra = 2.0 * scale() * buffer_size_;
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box2d<double> ext(current_extent_);
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ext.width(current_extent_.width() + extra);
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ext.height(current_extent_.height() + extra);
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return ext;
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}
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void Map::pan(int x,int y)
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{
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int dx = x - int(0.5 * width_);
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int dy = int(0.5 * height_) - y;
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double s = width_/current_extent_.width();
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double minx = current_extent_.minx() + dx/s;
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double maxx = current_extent_.maxx() + dx/s;
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double miny = current_extent_.miny() + dy/s;
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double maxy = current_extent_.maxy() + dy/s;
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current_extent_.init(minx,miny,maxx,maxy);
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}
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void Map::pan_and_zoom(int x,int y,double factor)
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{
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pan(x,y);
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zoom(factor);
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}
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double Map::scale() const
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{
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if (width_>0)
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return current_extent_.width()/width_;
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return current_extent_.width();
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}
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double Map::scale_denominator() const
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{
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projection map_proj(srs_);
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return mapnik::scale_denominator( *this, map_proj.is_geographic());
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}
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CoordTransform Map::view_transform() const
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{
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return CoordTransform(width_,height_,current_extent_);
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}
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featureset_ptr Map::query_point(unsigned index, double x, double y) const
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{
|
|
if ( index< layers_.size())
|
|
{
|
|
mapnik::layer const& layer = layers_[index];
|
|
try
|
|
{
|
|
double z = 0;
|
|
mapnik::projection dest(srs_);
|
|
mapnik::projection source(layer.srs());
|
|
proj_transform prj_trans(source,dest);
|
|
prj_trans.backward(x,y,z);
|
|
|
|
double minx = current_extent_.minx();
|
|
double miny = current_extent_.miny();
|
|
double maxx = current_extent_.maxx();
|
|
double maxy = current_extent_.maxy();
|
|
|
|
prj_trans.backward(minx,miny,z);
|
|
prj_trans.backward(maxx,maxy,z);
|
|
double tol = (maxx - minx) / width_ * 3;
|
|
mapnik::datasource_ptr ds = layer.datasource();
|
|
if (ds)
|
|
{
|
|
#ifdef MAPNIK_LOG
|
|
mapnik::log() << "map: Query at point tol=" << tol << "(" << x << "," << y << ")";
|
|
#endif
|
|
featureset_ptr fs = ds->features_at_point(mapnik::coord2d(x,y));
|
|
if (fs)
|
|
return boost::make_shared<filter_featureset<hit_test_filter> >(fs,
|
|
hit_test_filter(x,y,tol));
|
|
}
|
|
}
|
|
catch (...)
|
|
{
|
|
std::cerr << "Exception caught in \"query_point\"" << std::endl;
|
|
}
|
|
}
|
|
return featureset_ptr();
|
|
}
|
|
|
|
featureset_ptr Map::query_map_point(unsigned index, double x, double y) const
|
|
{
|
|
if ( index< layers_.size())
|
|
{
|
|
mapnik::layer const& layer = layers_[index];
|
|
CoordTransform tr = view_transform();
|
|
tr.backward(&x,&y);
|
|
|
|
try
|
|
{
|
|
mapnik::projection dest(srs_);
|
|
mapnik::projection source(layer.srs());
|
|
proj_transform prj_trans(source,dest);
|
|
double z = 0;
|
|
prj_trans.backward(x,y,z);
|
|
|
|
double minx = current_extent_.minx();
|
|
double miny = current_extent_.miny();
|
|
double maxx = current_extent_.maxx();
|
|
double maxy = current_extent_.maxy();
|
|
|
|
prj_trans.backward(minx,miny,z);
|
|
prj_trans.backward(maxx,maxy,z);
|
|
double tol = (maxx - minx) / width_ * 3;
|
|
mapnik::datasource_ptr ds = layer.datasource();
|
|
if (ds)
|
|
{
|
|
#ifdef MAPNIK_LOG
|
|
mapnik::log() << "map: Query at point tol=" << tol << "(" << x << "," << y << ")";
|
|
#endif
|
|
featureset_ptr fs = ds->features_at_point(mapnik::coord2d(x,y));
|
|
if (fs)
|
|
return boost::make_shared<filter_featureset<hit_test_filter> >(fs,
|
|
hit_test_filter(x,y,tol));
|
|
}
|
|
}
|
|
catch (...)
|
|
{
|
|
std::cerr << "Exception caught in \"query_map_point\"" << std::endl;
|
|
}
|
|
}
|
|
return featureset_ptr();
|
|
}
|
|
|
|
Map::~Map() {}
|
|
|
|
void Map::init_metawriters()
|
|
{
|
|
metawriter_cache_dispatch d(*this);
|
|
Map::style_iterator styIter = begin_styles();
|
|
Map::style_iterator styEnd = end_styles();
|
|
for (; styIter!=styEnd; ++styIter) {
|
|
std::vector<rule>& rules = styIter->second.get_rules_nonconst();
|
|
std::vector<rule>::iterator ruleIter = rules.begin();
|
|
std::vector<rule>::iterator ruleEnd = rules.end();
|
|
for (; ruleIter!=ruleEnd; ++ruleIter) {
|
|
rule::symbolizers::iterator symIter = ruleIter->begin();
|
|
rule::symbolizers::iterator symEnd = ruleIter->end();
|
|
for (; symIter!=symEnd; ++symIter) {
|
|
boost::apply_visitor(d, *symIter);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Map::set_metawriter_property(std::string name, std::string value)
|
|
{
|
|
#if (U_ICU_VERSION_MAJOR_NUM > 4) || (U_ICU_VERSION_MAJOR_NUM == 4 && U_ICU_VERSION_MINOR_NUM >=2)
|
|
metawriter_output_properties[name] = UnicodeString::fromUTF8(value);
|
|
#else
|
|
metawriter_output_properties[name] = UnicodeString(value.c_str());
|
|
#endif
|
|
}
|
|
|
|
std::string Map::get_metawriter_property(std::string name) const
|
|
{
|
|
std::string result;
|
|
to_utf8(metawriter_output_properties[name], result);
|
|
return result;
|
|
}
|
|
|
|
parameters const& Map::get_extra_parameters() const
|
|
{
|
|
return extra_params_;
|
|
}
|
|
|
|
parameters& Map::get_extra_parameters()
|
|
{
|
|
return extra_params_;
|
|
}
|
|
|
|
void Map::set_extra_parameters(parameters& params)
|
|
{
|
|
extra_params_ = params;
|
|
}
|
|
|
|
}
|