181 lines
5.2 KiB
C++
181 lines
5.2 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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//$Id$
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// mapnik
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#include <mapnik/color.hpp>
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#include <mapnik/color_factory.hpp>
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#include <mapnik/config_error.hpp>
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// boost
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#include <boost/format.hpp>
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#include <boost/version.hpp>
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// stl
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#include <sstream>
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// boost 1.41 -> 1.44 compatibility, to be removed in mapnik 2.1 (dane)
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#if BOOST_VERSION >= 104500
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#include <mapnik/css_color_grammar.hpp>
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#else
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#include <mapnik/css_color_grammar_deprecated.hpp>
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#endif
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namespace mapnik {
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color::color( std::string const& css_string)
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: red_(0),
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green_(0),
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blue_(0),
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alpha_(0xff)
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{
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color_factory::init_from_string(*this,css_string);
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}
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std::string color::to_string() const
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{
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std::stringstream ss;
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if (alpha_ == 255)
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{
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ss << "rgb("
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<< red() << ","
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<< green() << ","
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<< blue() << ")";
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}
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else
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{
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ss << "rgba("
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<< red() << ","
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<< green() << ","
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<< blue() << ","
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<< alpha()/255.0 << ")";
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}
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return ss.str();
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}
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std::string color::to_hex_string() const
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{
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if (alpha_ == 255 )
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{
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return (boost::format("#%1$02x%2$02x%3$02x")
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% red()
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% green()
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% blue() ).str();
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}
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else
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{
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return (boost::format("#%1$02x%2$02x%3$02x%4$02x")
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% red()
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% green()
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% blue()
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% alpha()).str();
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}
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}
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/****************************************************************************/
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void color_factory::init_from_string(color & c, std::string const& css_color)
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{
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typedef std::string::const_iterator iterator_type;
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typedef mapnik::css_color_grammar<iterator_type> css_color_grammar;
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css_color_grammar g;
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iterator_type first = css_color.begin();
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iterator_type last = css_color.end();
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// boost 1.41 -> 1.44 compatibility, to be removed in mapnik 2.1 (dane)
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#if BOOST_VERSION >= 104500
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bool result =
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boost::spirit::qi::phrase_parse(first,
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last,
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g,
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boost::spirit::ascii::space,
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c);
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if (!result)
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{
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throw config_error(std::string("Failed to parse color value: ") +
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"Expected a CSS color, but got '" + css_color + "'");
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}
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#else
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mapnik::css css_;
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bool result =
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boost::spirit::qi::phrase_parse(first,
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last,
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g,
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boost::spirit::ascii::space,
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css_);
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if (!result)
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{
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throw config_error(std::string("Failed to parse color value: ") +
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"Expected a CSS color, but got '" + css_color + "'");
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}
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c.set_red(css_.r);
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c.set_green(css_.g);
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c.set_blue(css_.b);
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c.set_alpha(css_.a);
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#endif
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}
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bool color_factory::parse_from_string(color & c, std::string const& css_color,
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mapnik::css_color_grammar<std::string::const_iterator> const& g)
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{
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std::string::const_iterator first = css_color.begin();
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std::string::const_iterator last = css_color.end();
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// boost 1.41 -> 1.44 compatibility, to be removed in mapnik 2.1 (dane)
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#if BOOST_VERSION >= 104500
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bool result =
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boost::spirit::qi::phrase_parse(first,
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last,
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g,
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boost::spirit::ascii::space,
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c);
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return result && (first == last);
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#else
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mapnik::css css_;
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bool result =
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boost::spirit::qi::phrase_parse(first,
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last,
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g,
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boost::spirit::ascii::space,
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css_);
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if (result && (first == last))
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{
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c.set_red(css_.r);
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c.set_green(css_.g);
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c.set_blue(css_.b);
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c.set_alpha(css_.a);
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return true;
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}
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#endif
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}
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color color_factory::from_string(std::string const& css_color)
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{
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color c;
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init_from_string(c, css_color);
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return c;
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}
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}
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