System.Drawing.Drawing2D.ExtendedGeneralPath.Reverse C# (CSharp) Method

		internal void Reverse ()
		{
			ClearCache ();
			// revert coordinates
			for (int i=0, max = CoordsCount / 2; i < max;) {
				int ix = i++;
				int iy = i++;
				int rix = CoordsCount - i;
				int riy = rix + 1;
				float tmpx = Coords [ix];
				float tmpy = Coords [iy];
				Coords [ix] = Coords [rix];
				Coords [iy] = Coords [riy];
				Coords [rix] = tmpx;
				Coords [riy] = tmpy;
			}

			// revert types
			sbyte [] newTypes = new sbyte [TypesCount];
			int oldIdx = 0;
			int newIdx = TypesCount - 1;
			int copyStart;
			int copyEnd;
			sbyte mask1 = 0;
			sbyte mask2 = 0;
			sbyte closeMask = 0;
			bool closedFigure = false;
			
			while (oldIdx < TypesCount) {
				// start copying after moveto
				copyStart = ++oldIdx;
				// continue to the next figure start
				while ((Types [oldIdx] != SEG_MOVETO) && (oldIdx < TypesCount))
					oldIdx++;

				copyEnd = oldIdx - 1;
				// check whenever current figure is closed
				if ((Types [oldIdx - 1] & SEG_CLOSE) != 0) {
					closedFigure = true;
					// close figure
					newTypes [newIdx--] = (sbyte)(SEG_CLOSE | mask1);
					mask1 = 0;
					mask2 = 0;
					// end copy one cell earlier
					copyEnd--;
					closeMask = (sbyte)(Types [oldIdx - 1] & (sbyte)SEG_MARKER);
				}
				else {
					mask2 = mask1;
					mask1 = 0;
				}

				// copy reverted "inner" types
				for(int i = copyStart; i <= copyEnd; i++) {
					newTypes [newIdx--] = (sbyte)((Types [i] & SEG_MASK) | mask2);
					mask2 = mask1;
					mask1 = (sbyte)(Types [i] & (sbyte)SEG_MARKER);
				}

				// copy moveto
				newTypes [newIdx--] = SEG_MOVETO;

				// pass close mask to the nex figure
				if (closedFigure) {
					mask1 = closeMask;
					closedFigure = false;
				}
			}

			_types = newTypes;
		}