/// <summary> Append length info. On success, store the result in "bits".</summary>
internal static void appendLengthInfo(int numLetters, int version, Mode mode, BitVector bits)
{
int numBits = mode.getCharacterCountBits(Version.getVersionForNumber(version));
if (numLetters > ((1 << numBits) - 1))
{
throw new WriterException(numLetters + "is bigger than" + ((1 << numBits) - 1));
}
bits.appendBits(numLetters, numBits);
}
public MicroQRCode()
{
mode = null;
ecLevel = null;
version = - 1;
matrixWidth = - 1;
maskPattern = - 1;
numTotalBytes = - 1;
numDataBytes = - 1;
numECBytes = - 1;
numRSBlocks = - 1;
matrix = null;
}
public MicroQRCode()
{
mode = null;
ecLevel = null;
version = -1;
matrixWidth = -1;
maskPattern = -1;
numTotalBytes = -1;
numDataBytes = -1;
numECBytes = -1;
numRSBlocks = -1;
matrix = null;
}
/// <summary> Append "bytes" in "mode" mode (encoding) into "bits". On success, store the result in "bits".</summary>
internal static void appendBytes(System.String content, Mode mode, BitVector bits, System.String encoding, int versionNum)
{
if (mode.Equals(Mode.NUMERIC))
{
appendNumericBytes(content, bits);
}
else if (mode.Equals(Mode.ALPHANUMERIC) && versionNum >= 2)
{
appendAlphanumericBytes(content, bits);
}
else if (mode.Equals(Mode.BYTE) && versionNum >= 3)
{
append8BitBytes(content, bits, encoding);
}
else if (mode.Equals(Mode.KANJI) && versionNum >= 3)
{
appendKanjiBytes(content, bits);
}
else
{
throw new WriterException("Invalid mode: " + mode);
}
}
/// <summary>
///
/// </summary>
/// <param name="content"></param>
/// <param name="ecLevel"></param>
/// <param name="hints"></param>
/// <param name="qrCode"></param>
public static void encode(System.String content, ErrorCorrectionLevel ecLevel,
System.Collections.Hashtable hints, MicroQRCode qrCode, int versionNum)
{
if (versionNum < 1 || versionNum > 4)
{
throw new ArgumentOutOfRangeException("versionNum", "versionNum [1, 4]");
}
System.String encoding = hints == null ? null : (System.String)hints[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, versionNum);
// Step 3: Initialize QR code that can contain "dataBits".
int numInputBytes = dataBits.sizeInBytes();
initQRCode(numInputBytes, ecLevel, mode, qrCode, versionNum);
// Step 4: Build another bit vector that contains header and data.
BitVector headerAndDataBits = new BitVector();
//INFO ECB+Mode+Length+Data[+terminate]
// Step 4.5: Append ECI message if applicable
appendModeInfo(mode, headerAndDataBits, versionNum);
int numLetters = mode.Equals(Mode.BYTE) ? dataBits.sizeInBytes() : content.Length;
appendLengthInfo(numLetters, qrCode.Version, mode, headerAndDataBits);
headerAndDataBits.appendBitVector(dataBits);
// Step 5: Terminate the bits properly.
terminateBits(qrCode.NumDataBytes, headerAndDataBits, versionNum);
// Step 6: Interleave data bits with error correction code.
BitVector finalBits = new BitVector();
interleaveWithECBytes(headerAndDataBits, versionNum, qrCode.NumTotalBytes, qrCode.NumDataBytes, qrCode.NumRSBlocks, finalBits);
// Step 7: Choose the mask pattern and set to "qrCode".
ByteMatrix matrix = new ByteMatrix(qrCode.MatrixWidth, qrCode.MatrixWidth);
qrCode.MaskPattern = chooseMaskPattern(finalBits, qrCode.ECLevel, qrCode.Version, matrix);
// Step 8. Build the matrix and set it to "qrCode".
MatrixUtil.buildMatrix(finalBits, qrCode.ECLevel, qrCode.Version, qrCode.MaskPattern, matrix);
qrCode.Matrix = matrix;
//var decoder = new com.google.zxing.microqrcode.decoder.Decoder();
//var res = decoder.decode(com.google.zxing.common.BitMatrix.FromByteMatrix(matrix));
//Console.WriteLine(res.Text);
// Step 9. Make sure we have a valid QR Code.
if (!qrCode.Valid)
{
throw new WriterException("Invalid QR code: " + qrCode.ToString());
}
}
/// <summary> Append mode info. On success, store the result in "bits".</summary>
internal static void appendModeInfo(Mode mode, BitVector bits, int versionNum)
{
bits.appendBits(mode.Bits, mode.getBitsLength(versionNum));
}
/// <summary> Initialize "qrCode" according to "numInputBytes", "ecLevel", and "mode". On success,
/// modify "qrCode".
/// </summary>
private static void initQRCode(int numInputBytes, ErrorCorrectionLevel ecLevel, Mode mode, MicroQRCode qrCode, int versionNum)
{
qrCode.ECLevel = ecLevel;
qrCode.Mode = mode;
// In the following comments, we use numbers of Version 7-H.
Version version = Version.getVersionForNumber(versionNum);
// numBytes = 196
int numBytes = version.TotalCodewords;
// getNumECBytes = 130
Version.ECBlocks ecBlocks = version.getECBlocksForLevel(ecLevel);
int numEcBytes = ecBlocks.TotalECCodewords;
// getNumRSBlocks = 5
int numRSBlocks = ecBlocks.NumBlocks;
// getNumDataBytes = 196 - 130 = 66
int numDataBytes = numBytes - numEcBytes;
// We want to choose the smallest version which can contain data of "numInputBytes" + some
// extra bits for the header (mode info and length info). The header can be three bytes
// (precisely 4 + 16 bits) at most. Hence we do +3 here.
if (numDataBytes >= numInputBytes)
{
// Yay, we found the proper rs block info!
qrCode.Version = versionNum;
qrCode.NumTotalBytes = numBytes;
qrCode.NumDataBytes = numDataBytes;
qrCode.NumRSBlocks = numRSBlocks;
// getNumECBytes = 196 - 66 = 130
qrCode.NumECBytes = numEcBytes;
// matrix width = 21 + 6 * 4 = 45
qrCode.MatrixWidth = version.DimensionForVersion;
return;
}
throw new WriterException("Cannot find proper rs block info (input data too big?)");
}
/// <summary> Initialize "qrCode" according to "numInputBytes", "ecLevel", and "mode". On success,
/// modify "qrCode".
/// </summary>
private static void initQRCode(int numInputBytes, ErrorCorrectionLevel ecLevel, Mode mode, MicroQRCode qrCode, int versionNum)
{
qrCode.ECLevel = ecLevel;
qrCode.Mode = mode;
// In the following comments, we use numbers of Version 7-H.
Version version = Version.getVersionForNumber(versionNum);
// numBytes = 196
int numBytes = version.TotalCodewords;
// getNumECBytes = 130
Version.ECBlocks ecBlocks = version.getECBlocksForLevel(ecLevel);
int numEcBytes = ecBlocks.TotalECCodewords;
// getNumRSBlocks = 5
int numRSBlocks = ecBlocks.NumBlocks;
// getNumDataBytes = 196 - 130 = 66
int numDataBytes = numBytes - numEcBytes;
// We want to choose the smallest version which can contain data of "numInputBytes" + some
// extra bits for the header (mode info and length info). The header can be three bytes
// (precisely 4 + 16 bits) at most. Hence we do +3 here.
if (numDataBytes >= numInputBytes)
{
// Yay, we found the proper rs block info!
qrCode.Version = versionNum;
qrCode.NumTotalBytes = numBytes;
qrCode.NumDataBytes = numDataBytes;
qrCode.NumRSBlocks = numRSBlocks;
// getNumECBytes = 196 - 66 = 130
qrCode.NumECBytes = numEcBytes;
// matrix width = 21 + 6 * 4 = 45
qrCode.MatrixWidth = version.DimensionForVersion;
return;
}
throw new WriterException("Cannot find proper rs block info (input data too big?)");
}
/// <summary> Append mode info. On success, store the result in "bits".</summary>
internal static void appendModeInfo(Mode mode, BitVector bits, int versionNum)
{
bits.appendBits(mode.Bits, mode.getBitsLength(versionNum));
}
/// <summary> Append length info. On success, store the result in "bits".</summary>
internal static void appendLengthInfo(int numLetters, int version, Mode mode, BitVector bits)
{
int numBits = mode.getCharacterCountBits(Version.getVersionForNumber(version));
if (numLetters > ((1 << numBits) - 1))
{
throw new WriterException(numLetters + "is bigger than" + ((1 << numBits) - 1));
}
bits.appendBits(numLetters, numBits);
}
/// <summary> Append "bytes" in "mode" mode (encoding) into "bits". On success, store the result in "bits".</summary>
internal static void appendBytes(System.String content, Mode mode, BitVector bits, System.String encoding, int versionNum)
{
if (mode.Equals(Mode.NUMERIC))
{
appendNumericBytes(content, bits);
}
else if (mode.Equals(Mode.ALPHANUMERIC) && versionNum >= 2)
{
appendAlphanumericBytes(content, bits);
}
else if (mode.Equals(Mode.BYTE) && versionNum >= 3)
{
append8BitBytes(content, bits, encoding);
}
else if (mode.Equals(Mode.KANJI) && versionNum >= 3)
{
appendKanjiBytes(content, bits);
}
else
{
throw new WriterException("Invalid mode: " + mode);
}
}
