internal DataMatrixCode(CodeSize size)
{
_size = size;
Bounds = new Bounds(size.Columns, size.Rows);
Metadata = new Metadata(BarcodeType.DataMatrix, 2);
_data = new BitList(size.Rows * size.Columns);
}
public static byte[] CalculateEcc(byte[] data, CodeSize size)
{
var dataSize = data.Length;
var result = new byte[data.Length + size.EccCount];
Array.Copy(data, result, data.Length);
for (int block = 0; block < size.BlockCount; block++)
{
var dataCnt = size.DataCodewordsForBlock(block);
var buff = new int[dataCnt];
// copy the data for the current block to buff
var j = 0;
for (int i = block; i < dataSize; i += size.BlockCount)
{
buff[j] = result[i];
j++;
}
// calc the error correction codes
var ecc = ReedSolomonEncoder.Encode(buff, size.ErrorCorrectionCodewordsPerBlock);
// and append them to the result
j = 0;
for (int i = block; i < size.ErrorCorrectionCodewordsPerBlock * size.BlockCount; i += size.BlockCount)
{
result[dataSize + i] = (byte)ecc[j];
j++;
}
}
return(result);
}
private static DataMatrixCode Render(byte[] data, CodeSize size)
{
var codeLayout = new CodeLayout(size);
codeLayout.SetValues(data);
return(codeLayout.Merge());
}
private static CodeSize GetFixedCodeSizeForData(int fixedNumberOfRows, int dataLength)
{
CodeSize codeSize = CodeSizes.All.FirstOrDefault(x => x.Rows == fixedNumberOfRows)
?? throw new InvalidOperationException($"No code size found with fixed number of rows {fixedNumberOfRows}");
if (codeSize.DataCodewords < dataLength)
{
throw new InvalidOperationException($"The fixed code size does not fit {dataLength} codewords");
}
return(codeSize);
}
public static IBarcode Encode(string content, int?fixedNumberOfRows = null, bool gs1ModeEnabled = false)
{
var data = gs1ModeEnabled
? EncodeGs1(content)
: EncodeText(content);
CodeSize size = fixedNumberOfRows.HasValue
? GetFixedCodeSizeForData(fixedNumberOfRows.Value, data.Length)
: GetSmallestCodeSizeForData(data.Length);
data = AddPadding(data, size.DataCodewords);
data = ErrorCorrection.CalculateEcc(data, size);
var code = Render(data, size)
?? throw new InvalidOperationException("Unable to render barcode");
code.Content = content;
return(code);
}
public CodeLayout(CodeSize size)
{
Size = size;
Matrix = new BitList(size.MatrixColumns * size.MatrixRows);
Occupy = new BitList(size.MatrixColumns * size.MatrixRows);
}