Topographer.Renderer.Crop C# (CSharp) 메소드

        private static Bitmap Crop(Bitmap b)
        {
            int top = 0;
            int bottom = b.Height - 1;
            int left = 0;
            int right = b.Width - 1;

            bool stop = false;
            for (int y = 0; y < b.Height && !stop; y++)
            {
                for (int x = 0; x < b.Width && !stop; x++)
                {
                    if (b.GetPixel(x, y).A > 0)
                    {
                        top = y;
                        stop = true;
                        break;
                    }
                }
            }

            stop = false;
            for (int y = b.Height - 1; y > top && !stop; y--)
            {
                for (int x = 0; x < b.Width && !stop; x++)
                {
                    if (b.GetPixel(x, y).A > 0)
                    {
                        bottom = y + 1;
                        stop = true;
                        break;
                    }
                }
            }

            stop = false;
            for (int x = 0; x < b.Width && !stop; x++)
            {
                for(int y = 0; y < b.Height && !stop; y++)
                {
                    if (b.GetPixel(x, y).A > 0)
                    {
                        left = x;
                        stop = true;
                        break;
                    }
                }
            }

            stop = false;
            for (int x = b.Width - 1; x > left && !stop; x--)
            {
                for (int y = 0; y < b.Height && !stop; y++)
                {
                    if (b.GetPixel(x, y).A > 0)
                    {
                        right = x + 1;
                        stop = true;
                        break;
                    }
                }
            }

            Bitmap ret = b.Clone(Rectangle.FromLTRB(left, top, right, bottom), b.PixelFormat);
            b.Dispose();
            return ret;
        }