I will draw GS1-DataMatrix in zxing. How do I?

[EunMi Lee]

Hello

I coding java.

I will draw GS1-DataMatrix in zxing.

I do not know what API should be used when creating a barcode that GS1-DataMatrix type.

I will appreciate tell us the answer.

[Lachezar Dobrev]

  // ZXing Core Project [1]

  new MultiFormatWriter()//
  .encode("Data Matrix Contents", BarcodeFormat.DATA_MATRIX, 300, 300);

  The 300 and 300 are the desired width and height to fit the matrix in.

  This generates a bit-matrix which you should render in a way appropriate for your platform.
  Typically for a Java SE/EE the c.g.z.client.j2se.MatrixToImageWriter is the way to go. This is found in the javase sub-project [2].

  [1] https://github.com/zxing/zxing/tree/master/core
  [2] https://github.com/zxing/zxing/tree/master/javase

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[EunMi Lee]

Thank you For your answer.
I used this way, But,I made DataMatrix barcodes with different the picture.

I used code

DataMatrixWriter dataMatrixWriter = new DataMatrixWriter();

//char FNC1 = 0xe8; // ASCII 232
char FNC1 = 0x1d; // ASCII 29

//String contents = FNC1 + "01088012345600161719123110A123";
String contents = FNC1 + "01" + "0" + "8801234560016" + "17" + "191231" + "10A123";


BarcodeFormat format = BarcodeFormat.DATA_MATRIX;
int width = 20;
int height = 20;
Map<EncodeHintType, Object> hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
hints.put(EncodeHintType.CHARACTER_SET, "ASCII");

BitMatrix bitMatrix = dataMatrixWriter.encode(contents, format, width, height, hints);

MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream(new File("img/img.png")));


How do I GS1-type of encoding is?
How do I use FNC?

2015년 11월 2일 월요일 오후 6시 56분 34초 UTC+9, Lachezar Dobrev 님의 말:

[Lachezar Dobrev]

  I took another look at this.

  It seems that FNC1 is not supported by ZXing for encoding Data Matrix.

  When decoding Data Matrix with a FNC1 codeword it gets reported as 0x1D character.

[Sean Owen]

Hm, what does support mean besides that? it's generally translated as ASCII 29.

[Lachezar Dobrev]

  The GS1 rules for bar-codes are not easy to read and understand.

  The rules I was able to dig out seem (to me) to point that the GS1 variant of Data Matrix must start with a FNC1 code word, not a <GS> (group separator, 0x001D) symbol. The current Data Matrix encoder does not allow for FNC1 to be encoded. One can encode a <GS>, but that is not the same, and the encoded matrix is different. Which is what I believe the original poster meant.

  It seems FNC1 is also used as a terminator/separator for variable-length elements.

  The GS1 imposes significant requirements on readers, for instance the first FNC1 has to be returned as ']d2' (no quotes), while subsequent FNC1 symbols are to be replaced with a <GS> symbol.

  This all seems a lot of specific content that may be outside the project's scope.

  [1] http://www.gs1.org/barcodes/2d
  [2] http://www.gs1.org/sites/default/files/docs/barcodes/GS1_DataMatrix_Guideline.pdf

2015-11-03 14:42 GMT+02:00 Sean Owen <sro...@gmail.com>:

Hm, what does support mean besides that? it's generally translated as ASCII 29.

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