/// <summary>
/// Initializes a new instance of the <see cref="PixelAntialiasedChecker"/> class.
/// </summary>
/// <param name="sourcePixel"></param>
/// <param name="imageStream"></param>
/// <param name="verticalPosition"></param>
/// <param name="horizontalPosition"></param>
/// <param name="width"></param>
public PixelAntialiasedChecker(PixelColor sourcePixel, ImageData imageStream, int verticalPosition, int horizontalPosition, int width)
{
int offset;
int distance = 1;
int i, j;
int hasHighContrastSibling = 0;
int hasSiblingWithDifferentHue = 0;
int hasEquivalentSibling = 0;
sourcePixel.AddHueInfo();
for (i = distance * -1; i <= distance; i++)
{
for (j = distance * -1; j <= distance; j++)
{
if (i == 0 && j == 0)
{
// Ignore source pixel
}
else
{
offset = ((verticalPosition + j) * width + (horizontalPosition + i)) * 4;
if (!PixelColor.TargetPixel.GetPixelInfo(imageStream, offset))
{
continue;
}
PixelColor.TargetPixel.AddBrightnessInfo();
PixelColor.TargetPixel.AddHueInfo();
if (new ContrastingChecker(sourcePixel, PixelColor.TargetPixel).Result)
{
hasHighContrastSibling++;
}
if (new RGBSameChecker(sourcePixel, PixelColor.TargetPixel).Result)
{
hasEquivalentSibling++;
}
if (Math.Abs(PixelColor.TargetPixel.Hue - sourcePixel.Hue) > 0.3)
{
hasSiblingWithDifferentHue++;
}
if (hasSiblingWithDifferentHue > 1 || hasHighContrastSibling > 1)
{
this.Result = true;
return;
}
}
}
}
if (hasEquivalentSibling < 2)
{
this.Result = true;
return;
}
this.Result = false;
}