701 lines
19 KiB
C++
701 lines
19 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/rule.hpp>
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#include <mapnik/color.hpp>
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#include <mapnik/font_set.hpp>
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#include <mapnik/enumeration.hpp>
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#include <mapnik/layer.hpp>
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#include <mapnik/feature_type_style.hpp>
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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/proj_transform.hpp>
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#include <mapnik/view_transform.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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// stl
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#include <stdexcept>
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namespace mapnik
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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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"RESPECT",
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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_(MAPNIK_LONGLAT_PROJ),
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buffer_size_(0),
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background_image_comp_op_(src_over),
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background_image_opacity_(1.0),
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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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background_image_comp_op_(src_over),
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background_image_opacity_(1.0),
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aspectFixMode_(GROW_BBOX),
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base_path_("") {}
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Map::Map(Map const& 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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background_image_comp_op_(rhs.background_image_comp_op_),
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background_image_opacity_(rhs.background_image_opacity_),
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styles_(rhs.styles_),
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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(Map && rhs)
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: width_(std::move(rhs.width_)),
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height_(std::move(rhs.height_)),
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srs_(std::move(rhs.srs_)),
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buffer_size_(std::move(rhs.buffer_size_)),
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background_(std::move(rhs.background_)),
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background_image_(std::move(rhs.background_image_)),
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background_image_comp_op_(std::move(rhs.background_image_comp_op_)),
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background_image_opacity_(std::move(rhs.background_image_opacity_)),
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styles_(std::move(rhs.styles_)),
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fontsets_(std::move(rhs.fontsets_)),
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layers_(std::move(rhs.layers_)),
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aspectFixMode_(std::move(rhs.aspectFixMode_)),
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current_extent_(std::move(rhs.current_extent_)),
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maximum_extent_(std::move(rhs.maximum_extent_)),
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base_path_(std::move(rhs.base_path_)),
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extra_params_(std::move(rhs.extra_params_)) {}
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Map::~Map() {}
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Map& Map::operator=(Map rhs)
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{
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swap(*this, rhs);
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return *this;
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}
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void swap (Map & lhs, Map & rhs)
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{
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using std::swap;
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std::swap(lhs.width_, rhs.width_);
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std::swap(lhs.height_, rhs.height_);
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std::swap(lhs.srs_, rhs.srs_);
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std::swap(lhs.buffer_size_, rhs.buffer_size_);
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std::swap(lhs.background_, rhs.background_);
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std::swap(lhs.background_image_, rhs.background_image_);
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std::swap(lhs.background_image_comp_op_, rhs.background_image_comp_op_);
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std::swap(lhs.background_image_opacity_, rhs.background_image_opacity_);
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std::swap(lhs.styles_, rhs.styles_);
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std::swap(lhs.fontsets_, rhs.fontsets_);
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std::swap(lhs.layers_, rhs.layers_);
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std::swap(lhs.aspectFixMode_, rhs.aspectFixMode_);
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std::swap(lhs.current_extent_, rhs.current_extent_);
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std::swap(lhs.maximum_extent_, rhs.maximum_extent_);
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std::swap(lhs.base_path_, rhs.base_path_);
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std::swap(lhs.extra_params_, rhs.extra_params_);
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}
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bool Map::operator==(Map const& rhs) const
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{
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return (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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(background_image_comp_op_ == rhs.background_image_comp_op_) &&
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(background_image_opacity_ == rhs.background_image_opacity_) &&
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(styles_ == rhs.styles_) &&
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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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}
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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 style)
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{
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return styles_.emplace(name, std::move(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_fontset(std::string const& name, font_set fontset)
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{
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if (fontset.get_name() != name)
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{
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throw mapnik::config_error("Fontset name must match the name used to reference it on the map");
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}
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return fontsets_.emplace(name, std::move(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::add_layer(layer l)
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{
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layers_.push_back(std::move(l));
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}
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void Map::remove_layer(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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}
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layer const& Map::get_layer(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::get_layer(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 != width_ &&
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width >= MIN_MAPSIZE &&
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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 != height_ &&
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height >= MIN_MAPSIZE &&
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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 != width_ ||
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height != height_) &&
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width >= MIN_MAPSIZE &&
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width <= MAX_MAPSIZE &&
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height >= MIN_MAPSIZE &&
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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(color const& 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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composite_mode_e Map::background_image_comp_op() const
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{
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return background_image_comp_op_;
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}
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void Map::set_background_image_comp_op(composite_mode_e comp_op)
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{
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background_image_comp_op_ = comp_op;
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}
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float Map::background_image_opacity() const
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{
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return background_image_opacity_;
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}
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void Map::set_background_image_opacity(float opacity)
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{
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background_image_opacity_ = opacity;
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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_.reset(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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void Map::reset_maximum_extent()
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{
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maximum_extent_.reset();
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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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try
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{
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if (layers_.empty())
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{
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return;
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}
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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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MAPNIK_LOG_DEBUG(map) << "map: Layer " << itr->name() << " original ext=" << itr->envelope();
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MAPNIK_LOG_DEBUG(map) << "map: Layer " << itr->name() << " transformed to map srs=" << layer_ext;
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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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{
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if (maximum_extent_) {
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ext.clip(*maximum_extent_);
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}
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zoom_to_box(ext);
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}
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else
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{
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if (maximum_extent_)
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{
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MAPNIK_LOG_ERROR(map) << "could not zoom to combined layer extents"
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<< " so falling back to maximum-extent for zoom_all result";
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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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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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}
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catch (proj_init_error const& 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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void Map::zoom_to_box(box2d<double> const& 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 (aspectFixMode_ == RESPECT) return;
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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_ = static_cast<unsigned>(std::floor(static_cast<double>(width_) / ratio2 + 0.5));
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break;
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case ADJUST_CANVAS_WIDTH:
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width_ = static_cast<unsigned>(std::floor(static_cast<double>(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:
|
|
if (ratio2 > ratio1)
|
|
width_ = static_cast<unsigned>(std::floor(static_cast<double>(height_) * ratio2 + 0.5));
|
|
else
|
|
height_ = static_cast<unsigned>(std::floor(static_cast<double>(width_) / ratio2 + 0.5));
|
|
break;
|
|
case SHRINK_CANVAS:
|
|
if (ratio2 > ratio1)
|
|
height_ = static_cast<unsigned>(std::floor(static_cast<double>(width_) / ratio2 + 0.5));
|
|
else
|
|
width_ = static_cast<unsigned>(std::floor(static_cast<double>(height_) * ratio2 + 0.5));
|
|
break;
|
|
default:
|
|
if (ratio2 > ratio1)
|
|
current_extent_.height(current_extent_.width() / ratio1);
|
|
else
|
|
current_extent_.width(current_extent_.height() * ratio1);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
box2d<double> const& Map::get_current_extent() const
|
|
{
|
|
return current_extent_;
|
|
}
|
|
|
|
box2d<double> Map::get_buffered_extent() const
|
|
{
|
|
double extra = 2.0 * scale() * buffer_size_;
|
|
box2d<double> ext(current_extent_);
|
|
ext.width(current_extent_.width() + extra);
|
|
ext.height(current_extent_.height() + extra);
|
|
return ext;
|
|
}
|
|
|
|
void Map::pan(int x,int y)
|
|
{
|
|
int dx = x - int(0.5 * width_);
|
|
int dy = int(0.5 * height_) - y;
|
|
double s = static_cast<double>(width_)/current_extent_.width();
|
|
double minx = current_extent_.minx() + dx/s;
|
|
double maxx = current_extent_.maxx() + dx/s;
|
|
double miny = current_extent_.miny() + dy/s;
|
|
double maxy = current_extent_.maxy() + dy/s;
|
|
current_extent_.init(minx,miny,maxx,maxy);
|
|
}
|
|
|
|
void Map::pan_and_zoom(int x,int y,double factor)
|
|
{
|
|
pan(x,y);
|
|
zoom(factor);
|
|
}
|
|
|
|
double Map::scale() const
|
|
{
|
|
if (width_>0)
|
|
return current_extent_.width()/static_cast<double>(width_);
|
|
return current_extent_.width();
|
|
}
|
|
|
|
double Map::scale_denominator() const
|
|
{
|
|
projection map_proj(srs_);
|
|
return mapnik::scale_denominator( scale(), map_proj.is_geographic());
|
|
}
|
|
|
|
view_transform Map::transform() const
|
|
{
|
|
return view_transform(width_,height_,current_extent_);
|
|
}
|
|
|
|
featureset_ptr Map::query_point(unsigned index, double x, double y) const
|
|
{
|
|
if (!current_extent_.valid())
|
|
{
|
|
throw std::runtime_error("query_point: map extent is not intialized, you need to set a valid extent before querying");
|
|
}
|
|
if (!current_extent_.intersects(x,y))
|
|
{
|
|
throw std::runtime_error("query_point: x,y coords do not intersect map extent");
|
|
}
|
|
if (index < layers_.size())
|
|
{
|
|
mapnik::layer const& layer = layers_[index];
|
|
mapnik::datasource_ptr ds = layer.datasource();
|
|
if (ds)
|
|
{
|
|
mapnik::projection dest(srs_);
|
|
mapnik::projection source(layer.srs());
|
|
proj_transform prj_trans(source,dest);
|
|
double z = 0;
|
|
if (!prj_trans.equal() && !prj_trans.backward(x,y,z))
|
|
{
|
|
throw std::runtime_error("query_point: could not project x,y into layer srs");
|
|
}
|
|
// calculate default tolerance
|
|
mapnik::box2d<double> map_ex = current_extent_;
|
|
if (maximum_extent_)
|
|
{
|
|
map_ex.clip(*maximum_extent_);
|
|
}
|
|
if (!prj_trans.backward(map_ex,PROJ_ENVELOPE_POINTS))
|
|
{
|
|
std::ostringstream s;
|
|
s << "query_point: could not project map extent '" << map_ex
|
|
<< "' into layer srs for tolerance calculation";
|
|
throw std::runtime_error(s.str());
|
|
}
|
|
double tol = (map_ex.maxx() - map_ex.minx()) / static_cast<double>(width_) * 3;
|
|
featureset_ptr fs = ds->features_at_point(mapnik::coord2d(x,y), tol);
|
|
MAPNIK_LOG_DEBUG(map) << "map: Query at point tol=" << tol << "(" << x << "," << y << ")";
|
|
if (fs)
|
|
{
|
|
return std::make_shared<filter_featureset<hit_test_filter> >(fs,
|
|
hit_test_filter(x,y,tol));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
std::ostringstream s;
|
|
s << "Invalid layer index passed to query_point: '" << index << "'";
|
|
if (!layers_.empty()) s << " for map with " << layers_.size() << " layers(s)";
|
|
else s << " (map has no layers)";
|
|
throw std::out_of_range(s.str());
|
|
}
|
|
return featureset_ptr();
|
|
}
|
|
|
|
featureset_ptr Map::query_map_point(unsigned index, double x, double y) const
|
|
{
|
|
view_transform tr = transform();
|
|
tr.backward(&x,&y);
|
|
return query_point(index,x,y);
|
|
}
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
}
|