iTextSharp.text.pdf.qrcode.ErrorCorrectionLevel.GetBits C# (CSharp) Method

        public int GetBits() {
            return bits;
        }

        // Make bit vector of type information. On success, store the result in "bits" and return true.
        // Encode error correction level and mask pattern. See 8.9 of
        // JISX0510:2004 (p.45) for details.
        public static void MakeTypeInfoBits(ErrorCorrectionLevel ecLevel, int maskPattern, BitVector bits)
        {
            if (!QRCode.IsValidMaskPattern(maskPattern))
            {
                throw new WriterException("Invalid mask pattern");
            }
            int typeInfo = (ecLevel.GetBits() << 3) | maskPattern;

            bits.AppendBits(typeInfo, 5);

            int bchCode = CalculateBCHCode(typeInfo, TYPE_INFO_POLY);

            bits.AppendBits(bchCode, 10);

            BitVector maskBits = new BitVector();

            maskBits.AppendBits(TYPE_INFO_MASK_PATTERN, 15);
            bits.Xor(maskBits);

            if (bits.Size() != 15)    // Just in case.
            {
                throw new WriterException("should not happen but we got: " + bits.Size());
            }
        }