// Return the point within a bitmap that matches 'target' the closest
private Point FindTargetColour(Bitmap bitmap, RGB target, out int distance)
{
Rectangle rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
BitmapData bm = bitmap.LockBits(rect, ImageLockMode.ReadOnly, bitmap.PixelFormat);
Point pt = new Point(0, 0);
distance = int.MaxValue;
unsafe
{
//Bitmap test_bm = new Bitmap(rect.Width, rect.Height, bm.PixelFormat);
RGB *px = (RGB *)bm.Scan0.ToPointer();
for (int y = 0; y != bitmap.Height; ++y)
{
RGB *col = px + y * bitmap.Width;
for (int x = 0; x != bitmap.Width; ++x, ++col)
{
//test_bm.SetPixel(x,y,Color.FromArgb(0xff, col->r, col->g, col->b));
int distsq = RGB.DistanceSq(target, *col);
if (distsq < distance)
{
pt.X = x;
pt.Y = y;
distance = distsq;
}
}
}
//test_bm.Save("D:/deleteme/screen_grap2.bmp");
}
bitmap.UnlockBits(bm);
distance = (int)Math.Sqrt(distance);
return(pt);
}
