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/*
* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "hsv.hpp"
#include "rgb.hpp"
namespace usdx
{
HsvColor::HsvColor(uint8_t hue, uint8_t saturation, uint8_t value)
: hue(hue), saturation(saturation), value(value)
{
}
HsvColor::HsvColor(const HsvColor& color)
: hue(color.hue), saturation(color.saturation), value(color.value)
{
}
HsvColor::HsvColor(const RgbColor& rgb)
: hue(0), saturation(0), value(0)
{
// find min and max RGB value
uint8_t rgb_min = rgb.get_red();
if (rgb.get_green() < rgb_min) rgb_min = rgb.get_green();
if (rgb.get_blue() < rgb_min) rgb_min = rgb.get_blue();
uint8_t rgb_max = rgb.get_red();
if (rgb.get_green() > rgb_max) rgb_max = rgb.get_green();
if (rgb.get_blue() > rgb_max) rgb_max = rgb.get_blue();
uint8_t rgb_delta = rgb_max - rgb_min;
if (rgb_max != 0) {
// compute value
value = rgb_max;
if (rgb_delta != 0) {
// compute saturation
saturation = (255 * (rgb_max - rgb_min)) / value;
// compute hue
if (rgb_max == rgb.get_red()) {
hue = 0 + 43 * (rgb.get_green() - rgb.get_blue()) / rgb_delta;
} else if (rgb_max == rgb.get_green()) {
hue = 85 + 43 * (rgb.get_blue() - rgb.get_red()) / rgb_delta;
} else /* rgb_max == rgb.get_blue() */ {
hue = 171 + 43 * (rgb.get_red() - rgb.get_green()) / rgb_delta;
}
}
}
}
HsvColor::~HsvColor()
{
}
HsvColor& HsvColor::operator=(const HsvColor& color)
{
if (this != &color) {
hue = color.hue;
saturation = color.saturation;
value = color.value;
}
return *this;
}
uint8_t HsvColor::get_hue(void) const
{
return hue;
}
uint8_t HsvColor::get_saturation(void) const
{
return saturation;
}
uint8_t HsvColor::get_value(void) const
{
return value;
}
}
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