public static Rectangle FindBoundingBoxAroundNode(Bitmap originalBitmap)
{
Point min = new Point(int.MaxValue, int.MaxValue);
Point max = new Point(int.MinValue, int.MinValue);
for (int x = 0; x < originalBitmap.Width; ++x)
{
for (int y = 0; y < originalBitmap.Height; ++y)
{
// Note that you can speed up this part of the algorithm by using LockBits and unsafe code instead of GetPixel.
Color pixelColor = originalBitmap.GetPixel(x, y);
// For each pixel that is not transparent calculate the bounding box around it.
if (pixelColor.ToArgb() != Color.Empty.ToArgb())
{
min.X = Math.Min(x, min.X);
min.Y = Math.Min(y, min.Y);
max.X = Math.Max(x, max.X);
max.Y = Math.Max(y, max.Y);
}
}
}
// Add one pixel to the width and height to avoid clipping.
return new Rectangle(min.X, min.Y, (max.X - min.X) + 1, (max.Y - min.Y) + 1);
}
//ExEnd
