|
public static BuildMatrix ( |
||
| dataBits | ||
| ecLevel | ||
| version | int | |
| maskPattern | int | |
| matrix | ||
| return | void | |
private static int ChooseMaskPattern(BitVector bits, ErrorCorrectionLevel ecLevel, int version,
ByteMatrix matrix)
{
var minPenalty = int.MaxValue; // Lower penalty is better.
var bestMaskPattern = -1;
// We try all mask patterns to choose the best one.
for (var maskPattern = 0; maskPattern < QRCode.NUM_MASK_PATTERNS; maskPattern++)
{
MatrixUtil.BuildMatrix(bits, ecLevel, version, maskPattern, matrix);
var penalty = CalculateMaskPenalty(matrix);
if (penalty < minPenalty)
{
minPenalty = penalty;
bestMaskPattern = maskPattern;
}
}
return(bestMaskPattern);
}
public static void Encode(string content, ErrorCorrectionLevel ecLevel, IDictionary <EncodeHintType, object> hints,
QRCode qrCode)
{
string encoding = null;
if (hints != null && hints.ContainsKey(EncodeHintType.CHARACTER_SET))
{
encoding = (string)hints[EncodeHintType.CHARACTER_SET];
}
if (encoding == null)
{
encoding = DEFAULT_BYTE_MODE_ENCODING;
}
// Step 1: Choose the mode (encoding).
var mode = ChooseMode(content, encoding);
// Step 2: Append "bytes" into "dataBits" in appropriate encoding.
var dataBits = new BitVector();
AppendBytes(content, mode, dataBits, encoding);
// Step 3: Initialize QR code that can contain "dataBits".
var numInputBytes = dataBits.SizeInBytes();
InitQRCode(numInputBytes, ecLevel, mode, qrCode);
// Step 4: Build another bit vector that contains header and data.
var headerAndDataBits = new BitVector();
// Step 4.5: Append ECI message if applicable
if (mode == Mode.BYTE && !DEFAULT_BYTE_MODE_ENCODING.Equals(encoding))
{
var eci = CharacterSetECI.GetCharacterSetECIByName(encoding);
if (eci != null)
{
AppendECI(eci, headerAndDataBits);
}
}
AppendModeInfo(mode, headerAndDataBits);
var 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.
var finalBits = new BitVector();
InterleaveWithECBytes(headerAndDataBits, qrCode.GetNumTotalBytes(), qrCode.GetNumDataBytes(),
qrCode.GetNumRSBlocks(), finalBits);
// Step 7: Choose the mask pattern and set to "qrCode".
var 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());
}
}
