#include "config.h"
#include "ColorDistance.h"
#include "Color.h"
#include <wtf/MathExtras.h>
namespace WebCore {
ColorDistance::ColorDistance()
: m_redDiff(0)
, m_greenDiff(0)
, m_blueDiff(0)
{
}
ColorDistance::ColorDistance(const Color& fromColor, const Color& toColor)
: m_redDiff(toColor.red() - fromColor.red())
, m_greenDiff(toColor.green() - fromColor.green())
, m_blueDiff(toColor.blue() - fromColor.blue())
{
}
ColorDistance::ColorDistance(int redDiff, int greenDiff, int blueDiff)
: m_redDiff(redDiff)
, m_greenDiff(greenDiff)
, m_blueDiff(blueDiff)
{
}
static inline int clampColorValue(int v)
{
if (v > 255)
v = 255;
else if (v < 0)
v = 0;
return v;
}
ColorDistance ColorDistance::scaledDistance(float scaleFactor) const
{
return ColorDistance(static_cast<int>(scaleFactor * m_redDiff),
static_cast<int>(scaleFactor * m_greenDiff),
static_cast<int>(scaleFactor * m_blueDiff));
}
Color ColorDistance::clampColor(int red, int green, int blue, int alpha)
{
return Color(clampColorValue(red), clampColorValue(green), clampColorValue(blue), clampColorValue(alpha));
}
Color ColorDistance::addColors(const Color& first, const Color& second)
{
return Color(first.red() + second.red(), first.green() + second.green(), first.blue() + second.blue());
}
Color ColorDistance::addToColor(const Color& color) const
{
return Color(color.red() + m_redDiff, color.green() + m_greenDiff, color.blue() + m_blueDiff);
}
bool ColorDistance::isZero() const
{
return !m_redDiff && !m_blueDiff && !m_greenDiff;
}
float ColorDistance::distance() const
{
return sqrtf(m_redDiff * m_redDiff + m_blueDiff * m_blueDiff + m_greenDiff * m_greenDiff);
}
}