| public static CreateColorWithCorrectedLightness ( System.Color color, float correctionFactor ) : System.Color | ||
| color | System.Color | /// Color to correct. /// |
| correctionFactor | float | /// Correction factor, with a value between -1 and 1. Negative values /// create darker color, positive values lighter color. Zero value /// returns the current color. /// |
| return | System.Color | |
public static Color CreateColorWithCorrectedLightness(Color color, float correctionFactor)
{
Debug.Assert(correctionFactor <= 1 && correctionFactor >= -1);
if (correctionFactor == 0)
return color;
float red = (float)color.R;
float green = (float)color.G;
float blue = (float)color.B;
if (correctionFactor < 0) {
correctionFactor = 1 + correctionFactor;
red *= correctionFactor;
green *= correctionFactor;
blue *= correctionFactor;
}
else {
red = (255 - red) * correctionFactor + red;
green = (255 - green) * correctionFactor + green;
blue = (255 - blue) * correctionFactor + blue;
}
return System.Drawing.Color.FromArgb(color.A, (int)red, (int)green, (int)blue);
}
/// <summary>
/// Gets the actual color used for rendering.
/// </summary>
public static Color GetRenderingColor(EdgeColorType edgeColorType, Color color)
{
Debug.Assert(color != Color.Empty);
if (edgeColorType == EdgeColorType.Contrast || edgeColorType == EdgeColorType.EnhancedContrast)
{
edgeColorType = GetContrastColorType(color, edgeColorType);
}
float correctionFactor = 0;
switch (edgeColorType)
{
case EdgeColorType.SystemColor:
return(SystemColors.WindowText);
case EdgeColorType.SurfaceColor:
return(color);
case EdgeColorType.FullContrast:
return(GetFullContrastColor(color));
case EdgeColorType.DarkerThanSurface:
correctionFactor = -ColorUtil.BrightnessEnhancementFactor1;
break;
case EdgeColorType.DarkerDarkerThanSurface:
correctionFactor = -ColorUtil.BrightnessEnhancementFactor2;
break;
case EdgeColorType.LighterThanSurface:
correctionFactor = +ColorUtil.BrightnessEnhancementFactor1;
break;
case EdgeColorType.LighterLighterThanSurface:
correctionFactor = +ColorUtil.BrightnessEnhancementFactor2;
break;
case EdgeColorType.NoEdge:
return(System.Drawing.Color.Transparent);
}
return(ColorUtil.CreateColorWithCorrectedLightness(color, correctionFactor));
}