346 lines
12 KiB
C++
346 lines
12 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) 2014 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_IMAGE_UTIL_HPP
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#define MAPNIK_IMAGE_UTIL_HPP
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// mapnik
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#include <mapnik/config.hpp>
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#include <mapnik/image_data.hpp>
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#include <mapnik/image_data_any.hpp>
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#include <mapnik/image_view.hpp>
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#include <mapnik/image_view_any.hpp>
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#include <mapnik/util/variant.hpp>
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#include <mapnik/color.hpp>
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// boost
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-local-typedef"
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/optional.hpp>
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#pragma GCC diagnostic pop
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// stl
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#include <string>
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#include <cmath>
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#include <exception>
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namespace mapnik {
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// fwd declares
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class Map;
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class rgba_palette;
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class ImageWriterException : public std::exception
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{
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private:
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std::string message_;
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public:
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ImageWriterException(std::string const& message)
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: message_(message) {}
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~ImageWriterException() throw() {}
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virtual const char* what() const throw()
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{
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return message_.c_str();
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}
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};
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image,
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std::string const& filename,
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std::string const& type);
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image,
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std::string const& filename,
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std::string const& type,
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rgba_palette const& palette);
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// guess type from file extension
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image,
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std::string const& filename);
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image,
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std::string const& filename,
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rgba_palette const& palette);
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template <typename T>
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MAPNIK_DECL std::string save_to_string(T const& image,
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std::string const& type);
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template <typename T>
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MAPNIK_DECL std::string save_to_string(T const& image,
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std::string const& type,
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rgba_palette const& palette);
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template <typename T>
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MAPNIK_DECL void save_to_stream
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(
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T const& image,
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std::ostream & stream,
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std::string const& type,
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rgba_palette const& palette
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);
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template <typename T>
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MAPNIK_DECL void save_to_stream
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(
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T const& image,
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std::ostream & stream,
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std::string const& type
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);
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template <typename T>
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MAPNIK_DECL bool premultiply_alpha(T & image);
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template <typename T>
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MAPNIK_DECL bool demultiply_alpha(T & image);
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template <typename T>
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MAPNIK_DECL void set_premultiplied_alpha(T & image, bool status);
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template <typename T>
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MAPNIK_DECL bool is_solid (T const& image);
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template <typename T>
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MAPNIK_DECL void set_alpha (T & image, float opacity);
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template <typename T>
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MAPNIK_DECL void set_grayscale_to_alpha (T & image);
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template <typename T>
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MAPNIK_DECL void set_color_to_alpha (T & image, color const& c);
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template <typename T1, typename T2>
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MAPNIK_DECL void fill (T1 & data, T2 const& c);
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template <typename T>
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MAPNIK_DECL void set_rectangle (T & dst, T const& src, int x = 0, int y = 0);
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template <typename T>
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MAPNIK_DECL bool check_bounds (T const& data, std::size_t x, std::size_t y)
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{
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return (x < static_cast<int>(data.width()) && y < static_cast<int>(data.height()));
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}
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template <typename T>
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MAPNIK_DECL void composite_pixel(T & data, unsigned op, int x, int y, unsigned c, unsigned cover, double opacity );
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template <typename T1, typename T2>
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MAPNIK_DECL void set_pixel(T1 & data, std::size_t x, std::size_t y, T2 const& val);
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template <typename T1, typename T2>
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MAPNIK_DECL T2 get_pixel(T1 const& data, std::size_t x, std::size_t y);
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MAPNIK_DECL void view_to_string (image_view_any const& view, std::ostringstream & ss);
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MAPNIK_DECL image_view_any create_view (image_data_any const& data, unsigned x, unsigned y, unsigned w, unsigned h);
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inline bool is_png(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".png"));
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}
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inline bool is_jpeg(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".jpg")) ||
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boost::algorithm::iends_with(filename,std::string(".jpeg"));
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}
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inline bool is_tiff(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".tif")) ||
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boost::algorithm::iends_with(filename,std::string(".tiff"));
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}
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inline bool is_pdf(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".pdf"));
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}
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inline bool is_svg(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".svg"));
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}
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inline bool is_ps(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".ps"));
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}
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inline bool is_webp(std::string const& filename)
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{
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return boost::algorithm::iends_with(filename,std::string(".webp"));
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}
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inline boost::optional<std::string> type_from_filename(std::string const& filename)
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{
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using result_type = boost::optional<std::string>;
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if (is_png(filename)) return result_type("png");
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if (is_jpeg(filename)) return result_type("jpeg");
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if (is_tiff(filename)) return result_type("tiff");
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if (is_pdf(filename)) return result_type("pdf");
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if (is_svg(filename)) return result_type("svg");
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if (is_ps(filename)) return result_type("ps");
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if (is_webp(filename)) return result_type("webp");
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return result_type();
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}
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inline std::string guess_type( std::string const& filename )
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{
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std::string::size_type idx = filename.find_last_of(".");
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if ( idx != std::string::npos ) {
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return filename.substr( idx + 1 );
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}
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return "<unknown>";
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}
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// add 1-px border around image - useful for debugging alignment issues
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template <typename T>
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void add_border(T & image)
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{
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for (unsigned x = 0; x < image.width();++x)
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{
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image(x,0) = 0xff0000ff; // red
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image(x,image.height()-1) = 0xff00ff00; //green
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}
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for (unsigned y = 0; y < image.height();++y)
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{
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image(0,y) = 0xff00ffff; //yellow
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image(image.width()-1,y) = 0xffff0000; // blue
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}
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}
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/*
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extern template MAPNIK_DECL void save_to_file<image_data_rgba8>(image_data_rgba8 const&,
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std::string const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL void save_to_file<image_data_any>(image_data_any const&,
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std::string const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL void save_to_file<image_data_rgba8>(image_data_rgba8 const&,
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std::string const&,
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std::string const&);
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extern template MAPNIK_DECL void save_to_file<image_data_any>(image_data_any const&,
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std::string const&,
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std::string const&);
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extern template MAPNIK_DECL void save_to_file<image_data_rgba8>(image_data_rgba8 const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL void save_to_file<image_data_any>(image_data_any const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL void save_to_file<image_data_rgba8>(image_data_rgba8 const&,
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std::string const&);
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extern template MAPNIK_DECL void save_to_file<image_data_any>(image_data_any const&,
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std::string const&);
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extern template MAPNIK_DECL void save_to_file<image_view_any>(image_view_any const&,
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std::string const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL void save_to_file<image_view_any>(image_view_any const&,
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std::string const&,
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std::string const&);
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extern template MAPNIK_DECL void save_to_file<image_view_any>(image_view_any const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL void save_to_file<image_view_any>(image_view_any const&,
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std::string const&);
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extern template MAPNIK_DECL std::string save_to_string<image_data_rgba8>(image_data_rgba8 const&,
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std::string const&);
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extern template MAPNIK_DECL std::string save_to_string<image_data_rgba8>(image_data_rgba8 const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL std::string save_to_string<image_view_rgba8> (image_view_rgba8 const&,
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std::string const&);
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extern template MAPNIK_DECL std::string save_to_string<image_view_rgba8> (image_view_rgba8 const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL std::string save_to_string<image_data_any>(image_data_any const&,
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std::string const&);
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extern template MAPNIK_DECL std::string save_to_string<image_data_any>(image_data_any const&,
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std::string const&,
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rgba_palette const&);
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extern template MAPNIK_DECL std::string save_to_string<image_view_any> (image_view_any const&,
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std::string const&);
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extern template MAPNIK_DECL std::string save_to_string<image_view_any> (image_view_any const&,
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std::string const&,
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rgba_palette const&);
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*/
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#ifdef _MSC_VER
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template MAPNIK_DECL void save_to_stream<image_data_rgba8>(
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image_data_rgba8 const& image,
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std::ostream & stream,
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std::string const& type,
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rgba_palette const& palette
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);
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template MAPNIK_DECL void save_to_stream<image_data_rgba8>(
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image_data_rgba8 const& image,
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std::ostream & stream,
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std::string const& type
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);
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template MAPNIK_DECL void save_to_stream<image_view_rgba8> (
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image_view_rgba8 const& image,
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std::ostream & stream,
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std::string const& type,
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rgba_palette const& palette
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);
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template MAPNIK_DECL void save_to_stream<image_view_rgba8> (
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image_view_rgba8 const& image,
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std::ostream & stream,
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std::string const& type
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);
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#endif
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}
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#endif // MAPNIK_IMAGE_UTIL_HPP
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