[reportlab-users] TrueType fonts and barcode widgets

[Markos Kapes]

When using True Type fonts as prescribed in the documentation, I get a value error if I use a unicode font with a barcode widget if I don't also set the font of the barcode widget to the same font. For the time being, it's not a big deal as it still gets the job done, but I'm curious what I might be doing wrong. The code works fine with builtin 'Courier' but if I try a system unicode font, it chokes unless I make sure barcode has the same font.

Thanks,
--Markos Kapes

The code relevant code is as follows, followed by the stack trace.
    rl_config.warnOnMissingFontGlyphs = 1
    registerFont(TTFont('Courier New', 'Courier New.ttf'))
    registerFont(TTFont('Courier New Bold', 'Courier New Bold.ttf'))
    registerFont(TTFont('Courier New Italic', 'Courier New Italic.ttf'))
    registerFont(TTFont('Courier New Bold Italic', 'Courier New Bold Italic.ttf'))
    registerFontFamily('Courier New', normal='Courier New', bold='Courier New Bold', italic='Courier New Italicc', boldItalic='Courier New Bold Italic')

    font = 'Courier New'
    font_size = 9
    doc_width = 2.4*inch
    doc_height = 2*inch
    margin = 0.1*inch
    tmpfile = tempfile.NamedTemporaryFile(delete=False)
    
    canvas1 = canvas.Canvas(tmpfile, (doc_width, doc_height))
    #change coordinates so origin is now at left bottom margin corner
    canvas1.translate(margin, margin)
    text_object = canvas1.beginText()
    text_object.setFont(font, font_size)
    text_object.setTextOrigin(0, column_height-margin)
    text_object.textOut( title)
    text_object.moveCursor(120, 0)
    text_object.textLine(price)
     canvas1.drawText(text_object)
    #create barcode and draw it at the origin.
    barcode1=barcode.createBarcodeDrawing('EAN13', value=isbn, validate=True, width= column_width, height=1.4*inch, humanReadable=True, fontName=font)
    renderPDF.draw(barcode1, canvas1, 0,0)
    canvas1.showPage()
    canvas1.save()


---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
/Library/Python/2.7/site-packages/ipython-0.14.dev-py2.7.egg/IPython/utils/py3compat.pyc in execfile(fname, *where)
    177             else:
    178                 filename = fname
--> 179             __builtin__.execfile(filename, *where)

/Users/mkapes/Documents/Developer/git_repos/infoshopkeeper/specialOrderLabel.py in <module>()
     92     canvas1.save()
     93 
---> 94 print_special_order_label(isbn=isbn, booktitle=booktitle, author=author, price=price, customer_name=customer_name, customer_phone=customer_phone, customer_email=customer_email)

/Users/mkapes/Documents/Developer/git_repos/infoshopkeeper/specialOrderLabel.py in print_special_order_label(isbn, booktitle, author, price, customer_name, customer_phone, customer_email)
     90     canvas1.drawText(text_object)
     91     canvas1.showPage()
---> 92     canvas1.save()
     93 
     94 print_special_order_label(isbn=isbn, booktitle=booktitle, author=author, price=price, customer_name=customer_name, customer_phone=customer_phone, customer_email=customer_email)

/Library/Python/2.7/site-packages/reportlab/pdfgen/canvas.pyc in save(self)
   1192            After this operation the canvas must not be used further."""
   1193         if len(self._code): self.showPage()
-> 1194         self._doc.SaveToFile(self._filename, self)
   1195 
   1196     def getpdfdata(self):

/Library/Python/2.7/site-packages/reportlab/pdfbase/pdfdoc.pyc in SaveToFile(self, filename, canvas)
    234             filename = utf8str(filename)
    235             f = open(filename, "wb")
--> 236         f.write(self.GetPDFData(canvas))
    237         if myfile:
    238             f.close()

/Library/Python/2.7/site-packages/reportlab/pdfbase/pdfdoc.pyc in GetPDFData(self, canvas)
    246         # realize delayed fonts
    247         for fnt in self.delayedFonts:
--> 248             fnt.addObjects(self)
    249         # add info stuff to signature
    250         self.info.invariant = self.invariant

/Library/Python/2.7/site-packages/reportlab/pdfbase/ttfonts.pyc in addObjects(self, doc)
   1124             if doc.compression:
   1125                 cmapStream.filters = [pdfdoc.PDFZCompress]
-> 1126             pdfFont.ToUnicode = doc.Reference(cmapStream, 'toUnicodeCMap:' + baseFontName)
   1127 
   1128             pdfFont.FontDescriptor = self.face.addSubsetObjects(doc, baseFontName, subset)

/Library/Python/2.7/site-packages/reportlab/pdfbase/pdfdoc.pyc in Reference(self, object, name, InstanceType)
    534             other = idToObject[name]
    535             if other!=object:
--> 536                 raise ValueError, "redefining named object: "+repr(name)
    537             return PDFObjectReference(name)
    538         if iob:

ValueError: redefining named object: 'toUnicodeCMap:AAAAAA+CourierNewPSMT'

> /Library/Python/2.7/site-packages/reportlab/pdfbase/pdfdoc.py(536)Reference()

    535             if other!=object:
--> 536                 raise ValueError, "redefining named object: "+repr(name)
    537             return PDFObjectReference(name)