6c0977099d
Make color::to_string() generate appropriate rgb() or rgba() strings depending on alpha() value. It also changes the alpha range to be 0.0-1.0, not 0-255.
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2009 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
//$Id$
|
|
|
|
// mapnik
|
|
#include <mapnik/color.hpp>
|
|
#include <mapnik/color_factory.hpp>
|
|
// boost
|
|
#include <boost/format.hpp>
|
|
// stl
|
|
#include <sstream>
|
|
|
|
namespace mapnik {
|
|
|
|
color::color( std::string const& css_string)
|
|
{
|
|
color_factory::init_from_string(*this,css_string.c_str());
|
|
}
|
|
|
|
std::string color::to_string() const
|
|
{
|
|
std::stringstream ss;
|
|
if (alpha() == 255) {
|
|
ss << "rgb("
|
|
<< red() << ","
|
|
<< green() << ","
|
|
<< blue() << ")";
|
|
} else {
|
|
ss << "rgba("
|
|
<< red() << ","
|
|
<< green() << ","
|
|
<< blue() << ","
|
|
<< alpha()/255.0 << ")";
|
|
}
|
|
return ss.str();
|
|
}
|
|
|
|
std::string color::to_hex_string() const
|
|
{
|
|
return (boost::format("#%1$02x%2$02x%3$02x")
|
|
% red()
|
|
% green()
|
|
% blue() ).str();
|
|
}
|
|
}
|
|
|