Code 39 Barcode Spec

[Alvaro]

I'm writing an application that needs to print barcode labels using the Code39 spec. Do you know of any source code which I can use to draw text in Code39 format?

Thanks in advance!

Alvaro

[Essam Helmy]

code 39 is a font, you can use the font in your reports. crystal report have this font and also Corel Draw

[Dieter Fauth]

Hi,
you might want to look there:

AIM USA AUTOMATIC IDENTIFICATION
MANUFACTURERS INC.

634 Alpha Drive
Pittsburgh, PA 15238-2802
Telephone: 412.963.8588
Telefax: 412.963.8753
Contact:
Larry Roberts, Executive Director
Dan Mullen, Director of Technical Services
Steve Halliday, VP Technology
* ANSI/AIM-BC1, Uniform Symbol Specification - Code 39 (1995)
* ANSI/AIM-BC2, Uniform Symbol Specification - Interleaved 2 of 5 (1995)
* ANSI/AIM-BC3, Uniform Symbol Specification - Codabar (1995)
* ANSI/AIM-BC4, Uniform Symbol Specification - Code 128 (1995)
* ANSI/AIM-BC5, Uniform Symbol Specification - Code 93 (1995)
* ANSI/AIM-BC6, Uniform Symbol Specification - Code 49 (1995)
* ANSI/AIM-BC7, Uniform Symbol Specification - Code 16K (1995)
* Uniform Symbol Specification - PDF417 (1994)
* Uniform Symbol Specification - Code One (1994)
* Uniform Symbol Specification - Data Matrix (1995)
* Uniform Symbol Specification - MaxiCode (1995)
* Symbology Identifiers (1990)
* Film Master Certification Program
* Small Animal RFID Specification (Draft)
* Channel Code (in discussion - 1995)

There might be a PDF version out in the net.

Dieter Fauth, Welch Allyn DCD


Dieter Fauth :-)

[Dieter Fauth]

Hi, again and again
this might be good for you:

http://www.adams1.com/pub/russadam/stack.html

Dieter Fauth, Welch Allyn DCD

PS: In case you need support for 2D barcodes, think about using Aztec code. The printing routines are free!

Dieter Fauth :-)

[Alvaro]

Thanks to everyone who replied to my message.

I searched everywhere and found some Java code that did what I wanted. So I converted it to C++/MFC and here it is, in case anyone's interested:


void DrawBarcodeText(CDC& dc, int nX, int nY, const CString& strText, int nHeight, double dWideToNarrowRatio)
{
static CString s_strCode39Alphabet= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*";
static char* s_arrayCode39Characters[] =
{
/* 0 */ "000110100", /* 1 */ "100100001", /* 2 */ "001100001", /* 3 */ "101100000",
/* 4 */ "000110001", /* 5 */ "100110000", /* 6 */ "001110000", /* 7 */ "000100101",
/* 8 */ "100100100", /* 9 */ "001100100", /* A */ "100001001", /* B */ "001001001",
/* C */ "101001000", /* D */ "000011001", /* E */ "100011000", /* F */ "001011000",
/* G */ "000001101", /* H */ "100001100", /* I */ "001001100", /* J */ "000011100",
/* K */ "100000011", /* L */ "001000011", /* M */ "101000010", /* N */ "000010011",
/* O */ "100010010", /* P */ "001010010", /* Q */ "000000111", /* R */ "100000110",
/* S */ "001000110", /* T */ "000010110", /* U */ "110000001", /* V */ "011000001",
/* W */ "111000000", /* X */ "010010001", /* Y */ "110010000", /* Z */ "011010000",
/* - */ "010000101", /* . */ "110000100", /*SPACE*/"011000100",/* $ */ "010101000",
/* / */ "010100010", /* + */ "010001010", /* % */ "000101010", /* * */ "010010100",
/*INVALID*/ "000000000"
};

// Add the start/stop characters
CString strToEncode = _TCHAR('*') + strText + _TCHAR('*');
CString strEncoded;

for (int iPos = 0, nLen = strToEncode.GetLength(); iPos < nLen - 1; iPos++)
{
int nChar = s_strCode39Alphabet.Find(strToEncode[iPos]);
if (nChar < 0)
nChar = 44; // invalid character
strEncoded += (s_arrayCode39Characters[nChar] + CString(_T("0")));
}

strEncoded += s_arrayCode39Characters[s_strCode39Alphabet.Find(strToEncode[iPos])];
double dNarrowestWidth = 1.0;

CRect rect(nX, nY, 0, nY + nHeight);
COLORREF colorChar = 0;

// Loop through all the characters and decode each 1 and 0 into a bar
for (iPos = 0, nLen = strEncoded.GetLength(); iPos < nLen; iPos++)
{
int nValue = (int)(dNarrowestWidth + 0.5);
if (strEncoded[iPos] == _TCHAR('1'))
nValue = (int)((dWideToNarrowRatio * dNarrowestWidth) + 0.5);

rect.right = rect.left + nValue;

if (iPos % 2 == 0)
{
for (int iPix = rect.left; iPix < rect.right; iPix++)
{
dc.MoveTo(iPix, rect.top);
dc.LineTo(iPix, rect.bottom);
}
}

rect.left += rect.Width();
}
}





Alvaro

[Gomez Addams]

Thanks for sharing your snippet. I have added it to my tips and tricks collection.
This subject could make an interesting article for codeguru (hint,hint to
illustrate how this kind of stuff is used. I know that I am curious.