[reportlab-users] ValueError: redefining named object

[jo]

Hi all,

I added a new font file to reportlab at  
/usr/lib/python2.4/site-packages/reportlab/fonts
I'm trying to use it but I have some difficulties.

If I call the function to print a line (self.show(txt='printing...', 
x=31, y=1,font='OCR',size=6) )
the first time it works, but the second time it rises the error:
ValueError: redefining named object: 
'toUnicodeCMap:SUBSET+OCRB10PitchBT-Regular+0'


here the sample:
----------------------------------------------------------------------------------------------- 

import reportlab
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont
reportlab.rl_config.warnOnMissingFontGlyphs = 0
pdfmetrics.registerFont(TTFont('OCR', 
'/usr/lib/python2.4/site-packages/reportlab/fonts/OCR-b___.ttf'))
from reportlab.pdfgen import canvas

class Fattura:
   def __init__(self,filename):
       self.ss = dict(   tx = None            ,
                         eli = None           ,
                         cnvs = None          ,
                         pxriga = 12          ,
                         borderx = 10         ,
                         bordery = 10         ,
                         name=filename        ,
                         pagesizex = 70 * 12  ,
                         pagesizey = 50 * 12  ,
                         )
       self.ss['cnvs'] = 
canvas.Canvas(self.ss['name'],pagesize=(self.ss['pagesizex'],self.ss['pagesizey']),bottomup=0) 


   def stampa(self):
       self.ss['tx'] = self.ss['cnvs'].beginText()
       self.ss['eli'] = self.ss['cnvs'].beginPath()
       # this line raises an error if this function is called twice...
       self.show(txt='printing...', x=31, y=1,font='OCR',size=6)
       self.ss['cnvs'].drawText(self.ss['tx'])
       self.ss['cnvs'].showPage()
       self.ss['cnvs'].save()
       return 1

   def show(self,txt='',x=None,y=None,font=None,size=None):
       self.ss['tx'].setFont(font, size)
       self.ss['tx'].setHorizScale(100)
       if x is not None and y is not None:
           self.ss['tx'].setTextOrigin(0,0)
           self.ss['tx'].moveCursor(
       (self.ss['borderx'] + (self.ss['pxriga'] * x)), 
(self.ss['bordery'] + (self.ss['pxriga'] * y)) )
       self.ss['tx'].textOut(" "+txt)

fd=open('pippo.pdf','w')
e=Fattura(fd)
for ii in range(2):
   ret=e.stampa()
fd.close()


here the error:

# python test.py
Traceback (most recent call last):
 File "test.py", line 44, in ?
   ret=e.stampa()
 File "test.py", line 29, in stampa
   self.ss['cnvs'].save()
 File "/usr/lib/python2.4/site-packages/reportlab/pdfgen/canvas.py", 
line 831, in save
   self._doc.SaveToFile(self._filename, self)
 File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 
line 233, in SaveToFile
   f.write(self.GetPDFData(canvas))
 File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 
line 245, in GetPDFData
   fnt.addObjects(self)
 File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", 
line 1040, in addObjects
   pdfFont.ToUnicode = doc.Reference(cmapStream, 'toUnicodeCMap:' + 
baseFontName)
 File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 
line 475, in Reference
   raise ValueError, "redefining named object: "+repr(name)
ValueError: redefining named object: 
'toUnicodeCMap:SUBSET+OCRB10PitchBT-Regular+0'



anyone knows how to solve this problem?
thank you all,

j