color_io.hpp

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// Copyright (c) 2017 Kolya Kosenko
 
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
 
 
#ifndef BOOST_UI_COLOR_IO_HPP
#define BOOST_UI_COLOR_IO_HPP
 
#include <boost/ui/config.hpp>
 
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
 
#include <boost/ui/color.hpp>
 
#include <ostream>
 
namespace boost {
namespace ui    {
 
 
template <class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const boost::ui::color& c)
{
    const bool is_transparent = c.alpha255() != 255;
    os << 'r' << 'g' << 'b';
    if ( is_transparent )
        os << 'a';
    os << '(' << static_cast<int>(c.red255());
    os << ',' << static_cast<int>(c.green255());
    os << ',' << static_cast<int>(c.blue255());
    if ( is_transparent )
        os << ',' << static_cast<int>(c.alpha255());
    os << ')';
    return os;
}
 
} // namespace ui
} // namespace boost
 
#endif // BOOST_UI_COLOR_IO_HPP