protected Color ResolveColor(string hexColor)
{
var resultColor = DefaultGridLinesColor;
if (string.IsNullOrEmpty(hexColor))
{
return(resultColor);
}
var colorObject = model.CreateInstance(model.Types[ChartingConstants.HexColorDataType]);
colorObject[ChartingConstants.HexColorPropertyName] = hexColor;
return(colorConverter.Convert(colorObject));
}
/// <summary>
/// Transforms XYZ color to destination reference white.
/// </summary>
public XYZ Transform(XYZ sourceColor, XYZ sourceWhitePoint, XYZ targetWhitePoint)
{
if (sourceColor == null)
{
throw new ArgumentNullException(nameof(sourceColor));
}
if (sourceWhitePoint == null)
{
throw new ArgumentNullException(nameof(sourceWhitePoint));
}
if (targetWhitePoint == null)
{
throw new ArgumentNullException(nameof(targetWhitePoint));
}
if (sourceWhitePoint.Equals(targetWhitePoint))
{
return(sourceColor);
}
var sourceColorLMS = _conversionToLMS.Convert(sourceColor);
if (sourceWhitePoint != _lastSourceWhitePoint || targetWhitePoint != _lastTargetWhitePoint)
{
var sourceWhitePointLMS = _conversionToLMS.Convert(sourceWhitePoint);
var targetWhitePointLMS = _conversionToLMS.Convert(targetWhitePoint);
_cachedDiagonalMatrix = Matrix.Diagonal(targetWhitePointLMS.L / sourceWhitePointLMS.L, targetWhitePointLMS.M / sourceWhitePointLMS.M, targetWhitePointLMS.S / sourceWhitePointLMS.S);
_lastSourceWhitePoint = sourceWhitePoint;
_lastTargetWhitePoint = targetWhitePoint;
}
var targetColorLMS = new LMS(_cachedDiagonalMatrix.Multiply(sourceColorLMS.Vector));
var targetColor = _conversionToXYZ.Convert(targetColorLMS);
return(targetColor);
}
public double ColourfulConvert()
{
return(ColourfulConverter.Convert(XYZColor).L);
}
public RGBColor ColourfulConvert()
{
return(ColourfulConverter.Convert(RGBColor));
}
/// <summary> /// See https://en.wikipedia.org/wiki/CIELAB_color_space /// </summary> private static LabColor ToLabColor(int r, int g, int b) => converter.Convert(new RGBColor((double)r / 255, (double)g / 255, (double)b / 255));