[reportlab-users] ttfont checksum fails

[matt-lists at comnet.net.nz]

Hello,

I'm new to this list, so please excuse any indiscretions.

I'm in the middle of putting together a function in an application I maintain 
to create reports in pdf format.  The application has been translated into a 
number of different languages, and so I need to generate a report using a 
font that has good non-latin character support.  At the moment, I've chosen 
verdana.  

I'm using the following code:

    import reportlab.rl_config
    reportlab.rl_config.warnOnMissingFontGlyphs = 0
    from reportlab.pdfbase import pdfmetrics
    from reportlab.pdfbase.ttfonts import TTFont
    import time
    enc = 'UTF-8' 
    pdfmetrics.registerFont(TTFont('Verdana', config_directory 
+ '/verdana.ttf',enc))
    pdfmetrics.registerFont(TTFont('Verdana Bold', config_directory 
+ '/Verdana_Bold.ttf',enc))

to register the font with reportlab (config_directory is a variable holding 
the path to the directory where the verdana fonts I want to use are held).  
However,  on executing this code, I'm getting the following error:

Traceback (most recent call last):
  File "liquid_weather.py", line 4022, in menuOptionChanged
    printForecast(widget,0)
  File "liquid_weather.py", line 3330, in printForecast
    pdfmetrics.registerFont(TTFont('Verdana', config_directory 
+ '/verdana.ttf',enc))
  File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", line 
1000, in __init__
    self.face = TTFontFace(filename, validate=validate, 
subfontIndex=subfontIndex)
  File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", line 
915, in __init__
    TTFontFile.__init__(self, filename, validate=validate, 
subfontIndex=subfontIndex)
  File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", line 
433, in __init__
    TTFontParser.__init__(self, file, 
validate=validate,subfontIndex=subfontIndex)
  File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", line 
221, in __init__
    if self.validate: self.checksumFile()
  File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", line 
309, in checksumFile
    raise TTFError('TTF file "%s": invalid checksum %s len: %d &3: %d' % 
(self.filename,hex32(checkSum),len(self._ttf_data),(len(self._ttf_data)&3)))
reportlab.pdfbase.ttfonts.TTFError: TTF 
file "/home/matt/.superkaramba/lwp/verdana.ttf": invalid checksum 0XBBB0AFBA 
len: 149753 &3: 1

It appears that the checksum is failing.  Is it possible to disable checksum 
validation.  I've had a quick look through the code, but can't find a way to 
do this (although, it was a very quick look).  I note their is an option 
within the various methods to set validate=false, but I can't see how to do 
that from within my application when I call the registerFont function.  

Any help would be appreciated.  Thanks in advance.

Regards

Matt