106 lines
3 KiB
C++
106 lines
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) 2024 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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#ifndef MAPNIK_PROJECTION_HPP
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#define MAPNIK_PROJECTION_HPP
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// mapnik
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#include <mapnik/config.hpp>
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#include <mapnik/well_known_srs.hpp>
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#include <mapnik/geometry/box2d.hpp>
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#include <mapnik/warning.hpp>
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MAPNIK_DISABLE_WARNING_PUSH
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#include <mapnik/warning_ignore.hpp>
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#include <boost/optional.hpp>
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MAPNIK_DISABLE_WARNING_POP
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// stl
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#include <string>
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#include <stdexcept>
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// fwd decl
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#if MAPNIK_PROJ_VERSION >= 80000
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struct pj_ctx;
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using PJ_CONTEXT = struct pj_ctx;
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#else
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struct projCtx_t;
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using PJ_CONTEXT = struct projCtx_t;
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#endif
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struct PJconsts;
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using PJ = struct PJconsts;
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namespace mapnik {
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class proj_init_error : public std::runtime_error
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{
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public:
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proj_init_error(std::string const& params)
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: std::runtime_error("failed to initialize projection with: '" + params + "'")
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{}
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};
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class MAPNIK_DECL projection
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{
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friend class proj_transform;
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public:
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projection(std::string const& params, bool defer_proj_init = false);
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projection(projection const& rhs);
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~projection();
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projection& operator=(projection const& rhs);
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bool operator==(const projection& other) const;
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bool operator!=(const projection& other) const;
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bool is_initialized() const;
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bool is_geographic() const;
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std::optional<well_known_srs_e> well_known() const;
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std::string const& params() const;
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void forward(double& x, double& y) const;
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void inverse(double& x, double& y) const;
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std::string definition() const;
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std::string description() const;
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void init_proj();
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std::optional<box2d<double>> area_of_use() const;
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private:
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void swap(projection& rhs);
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private:
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std::string params_;
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bool defer_proj_init_;
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bool is_geographic_;
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std::optional<box2d<double>> area_of_use_;
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mutable PJ* proj_;
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mutable PJ_CONTEXT* proj_ctx_;
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};
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template<typename charT, typename traits>
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std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& s, mapnik::projection const& p)
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{
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s << "projection(\"" << p.params() << "\")";
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return s;
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}
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} // namespace mapnik
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#endif // MAPNIK_PROJECTION_HPP
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