/// <exception cref="iText.Barcodes.Qrcode.WriterException"/> public static void Encode(String content, ErrorCorrectionLevel ecLevel, IDictionary <EncodeHintType, Object > hints, QRCode qrCode) { String encoding = hints == null ? null : (String)hints.Get(EncodeHintType.CHARACTER_SET); if (encoding == null) { encoding = DEFAULT_BYTE_MODE_ENCODING; } // Step 1: Choose the mode (encoding). Mode mode = ChooseMode(content, encoding); // Step 2: Append "bytes" into "dataBits" in appropriate encoding. BitVector dataBits = new BitVector(); AppendBytes(content, mode, dataBits, encoding); // Step 3: Initialize QR code that can contain "dataBits". int numInputBytes = dataBits.SizeInBytes(); InitQRCode(numInputBytes, ecLevel, mode, qrCode); // Step 4: Build another bit vector that contains header and data. BitVector headerAndDataBits = new BitVector(); // Step 4.5: Append ECI message if applicable if (mode == Mode.BYTE && !DEFAULT_BYTE_MODE_ENCODING.Equals(encoding)) { CharacterSetECI eci = CharacterSetECI.GetCharacterSetECIByName(encoding); if (eci != null) { AppendECI(eci, headerAndDataBits); } } AppendModeInfo(mode, headerAndDataBits); int numLetters = mode.Equals(Mode.BYTE) ? dataBits.SizeInBytes() : content.Length; AppendLengthInfo(numLetters, qrCode.GetVersion(), mode, headerAndDataBits); headerAndDataBits.AppendBitVector(dataBits); // Step 5: Terminate the bits properly. TerminateBits(qrCode.GetNumDataBytes(), headerAndDataBits); // Step 6: Interleave data bits with error correction code. BitVector finalBits = new BitVector(); InterleaveWithECBytes(headerAndDataBits, qrCode.GetNumTotalBytes(), qrCode.GetNumDataBytes(), qrCode.GetNumRSBlocks (), finalBits); // Step 7: Choose the mask pattern and set to "qrCode". ByteMatrix matrix = new ByteMatrix(qrCode.GetMatrixWidth(), qrCode.GetMatrixWidth()); qrCode.SetMaskPattern(ChooseMaskPattern(finalBits, qrCode.GetECLevel(), qrCode.GetVersion(), matrix)); // Step 8. Build the matrix and set it to "qrCode". MatrixUtil.BuildMatrix(finalBits, qrCode.GetECLevel(), qrCode.GetVersion(), qrCode.GetMaskPattern(), matrix ); qrCode.SetMatrix(matrix); // Step 9. Make sure we have a valid QR Code. if (!qrCode.IsValid()) { throw new WriterException("Invalid QR code: " + qrCode.ToString()); } }
private static void AppendECI(CharacterSetECI eci, BitVector bits) { bits.AppendBits(Mode.ECI.GetBits(), 4); // This is correct for values up to 127, which is all we need now. bits.AppendBits(eci.GetValue(), 8); }