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/************************************************************************
*
* Copyright (C) 2014-2023 IRCAD France
* Copyright (C) 2014-2020 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight 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 3 of the License, or
* (at your option) any later version.
*
* Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "data/tools/color.hpp"
#include "core/spy_log.hpp"
#include <core/exceptionmacros.hpp>
#include <sstream>
namespace sight::data::tools
{
//------------------------------------------------------------------------------
void color::hexa_string_to_rgba(const std::string& _hexa_color, std::array<std::uint8_t, 4>& _rgba)
{
SIGHT_THROW_IF(
"Color string should start with '#' and followed by 6 or 8 "
"hexadecimal digits. Given color: " + _hexa_color,
_hexa_color[0] != '#'
|| (_hexa_color.length() != 7 && _hexa_color.length() != 9)
);
std::string red_string = _hexa_color.substr(1, 2);
std::string green_string = _hexa_color.substr(3, 2);
std::string blue_string = _hexa_color.substr(5, 2);
int r = 0;
int g = 0;
int b = 0;
int a = 255;
std::istringstream iss;
iss.str(red_string);
iss >> std::hex >> r;
iss.clear();
iss.str(green_string);
iss >> std::hex >> g;
iss.clear();
iss.str(blue_string);
iss >> std::hex >> b;
_rgba[3] = 255;
if(_hexa_color.length() == 9)
{
std::string alpha_string = _hexa_color.substr(7, 2);
iss.clear();
iss.str(alpha_string);
iss >> std::hex >> a;
}
_rgba[0] = static_cast<std::uint8_t>(r);
_rgba[1] = static_cast<std::uint8_t>(g);
_rgba[2] = static_cast<std::uint8_t>(b);
_rgba[3] = static_cast<std::uint8_t>(a);
}
//------------------------------------------------------------------------------
} // end namespace sight::data::tools
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