public static iText.Kernel.Colors.DeviceRgb MakeDarker(iText.Kernel.Colors.DeviceRgb rgbColor)
{
float r = rgbColor.GetColorValue()[0];
float g = rgbColor.GetColorValue()[1];
float b = rgbColor.GetColorValue()[2];
float v = Math.Max(r, Math.Max(g, b));
float multiplier = Math.Max(0f, (v - 0.33f) / v);
r = multiplier * r;
g = multiplier * g;
b = multiplier * b;
return(new iText.Kernel.Colors.DeviceRgb(r, g, b));
}
public static iText.Kernel.Colors.DeviceRgb MakeLighter(iText.Kernel.Colors.DeviceRgb rgbColor)
{
float r = rgbColor.GetColorValue()[0];
float g = rgbColor.GetColorValue()[1];
float b = rgbColor.GetColorValue()[2];
float v = Math.Max(r, Math.Max(g, b));
if (v == 0f)
{
return(new iText.Kernel.Colors.DeviceRgb(0x54, 0x54, 0x54));
}
float multiplier = Math.Min(1f, v + 0.33f) / v;
r = multiplier * r;
g = multiplier * g;
b = multiplier * b;
return(new iText.Kernel.Colors.DeviceRgb(r, g, b));
}