[Gambas-user] BarCode

[Paul Horechuk]

On April 23, 2007, nando wrote:
> Info: I do know that there are PHP scripts to do this.
> -Fernando
>
>
> ---------- Original Message -----------
> From: Werner <wdahn at ...1000...>
> To: mailing list for gambas users <gambas-user at lists.sourceforge.net>
> Sent: Tue, 24 Apr 2007 01:34:55 +0800
> Subject: Re: [Gambas-user] BarCode
>
> > Hamilton Geminiano Andrioli Junior wrote:
> > > Hi Guys!
> > >
> > > I need some papers about how to produce barcodes with gambas.
> > > I have to print Code 2 of 5 interleaved and EAN13.
> > >
> > > Anyone?
> > > In VB i used some True Type Fonts i founded in internet. In Gambas?
> > > how to do? And i had a OCX that prints a EAN13 bar code.
> > >
> > > Well, now i will have to learn how to make this...
> > >
> > > Any help?
> > > Regards
> > > Hamilton From Brazil!
> >
> > Do you think KBarcode might be for you?
> > http://www.kbarcode.net/
> >
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> ------- End of Original Message -------
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Sorry I used the wrong subscriber address the first time...


Look for a program called GNU barcode. It is commandline driven and will 
accept as parameters, the string to encode, the encoding method, and the 
name of the PS output file, plus a few flags.

eg: barcode -n -e 128b -b "@$1" -o /tmp/barcode.ps
will use code 128B to encrypt the passed text (@$1), strip the ascii text 
label and produce a PostScript file called /tmp/barcode.ps

You can then use ghostscript to further process:
gs -dNOPAUSE -sDEVICE=png256 -sOutputFile=/tmp/barcode.png -q -dBATCH /tmp/barcode.ps

This will convert from the ps file to 256 colour png, and finally:
convert /tmp/barcode.png -crop 140x50+7+703 /tmp/barcode.png
to trim the barcode to the desired size.

No need for special fonts!

-- 
Paul Horechuk
      Think Free 
Use Open Source Software