System.Drawing.Graphics.MeasureCharacterRanges C# (CSharp) Method

        public Region[] MeasureCharacterRanges(string text, Font font, RectangleF layoutRect, StringFormat stringFormat)
        {
            if ((text == null) || (text.Length == 0))
                return new Region [0];

            if (font == null)
                throw new ArgumentNullException ("font");

            if (stringFormat == null)
                throw new ArgumentException ("stringFormat");

            throw new NotImplementedException ();
        }

        public DisplayCharacterRanges(System.Drawing.Graphics gr, System.Drawing.Font font, StringFormat format, string text)
        {
            _rectF = new RectangleF[text.Length];
            int   c       = 0;
            float xOffset = 0;

            for (int l = 0; l < text.Length; l += 32, c += 32)
            {
                string t = text.Substring(l, Math.Min(32, text.Length - l));

                CharacterRange[] ranges = new CharacterRange[t.Length];
                for (int i = 0; i < t.Length; i++)
                {
                    ranges[i] = new CharacterRange(i, 1);
                }

                format.SetMeasurableCharacterRanges(ranges);

                SizeF    size    = gr.MeasureString(t, font);
                Region[] regions = gr.MeasureCharacterRanges(t, font, new RectangleF(0, 0, size.Width, size.Height), format);

                for (int i = 0; i < regions.Length; i++)
                {
                    _rectF[c + i]    = regions[i].GetBounds(gr);
                    _rectF[c + i].X += xOffset;
                    regions[i].Dispose();
                }

                xOffset = _rectF[c + t.Length - 1].X + _rectF[c + t.Length - 1].Width;
            }
        }