[reportlab-users] Forcing usage of DejaVu fonts instead of standardfonts in PDF

[Sorin Sbarnea]

I have several problems with missing special characters in default
fonts and I want to force the DejaVu fonts (last release) instead of
the default Times/Helvetica/Courier using:

pdfmetrics.registerFont(TTFont('Times-Roman',           'DejaVuSerif.ttf'))
pdfmetrics.registerFont(TTFont('Times-BoldItalic',
'DejaVuSerif-BoldItalic.ttf'))
pdfmetrics.registerFont(TTFont('Times-Bold',            'DejaVuSerif-Bold.ttf'))
pdfmetrics.registerFont(TTFont('Times-Italic',
'DejaVuSerif-Italic.ttf'))

pdfmetrics.registerFont(TTFont('Helvetica',             'DejaVuSans.ttf'))
pdfmetrics.registerFont(TTFont('Helvetica-BoldItalic',
'DejaVuSans-BoldOblique.ttf'))
pdfmetrics.registerFont(TTFont('Helvetica-Bold',        'DejaVuSans-Bold.ttf'))
pdfmetrics.registerFont(TTFont('Helvetica-Italic',
'DejaVuSans-Oblique.ttf'))

pdfmetrics.registerFont(TTFont('Courier',           'DejaVuSansMono.ttf'))
pdfmetrics.registerFont(TTFont('Courier-Bold',      'DejaVuSansMono-Bold.ttf'))
pdfmetrics.registerFont(TTFont('Courier-BoldItalic','DejaVuSansMono-BoldOblique.ttf'))
pdfmetrics.registerFont(TTFont('Courier-Italic',
'DejaVuSansMono-Oblique.ttf'))

The first problem is seams that i receive:
File "trml2pdf.py", line 736, in <module>
 print parseString(file(sys.argv[1], 'r').read()),
File "trml2pdf.py", line 724, in parseString
 r.render(fp)
File "trml2pdf.py", line 234, in render
 pt_obj.render(self.dom.documentElement.getElementsByTagName('story'))
File "trml2pdf.py", line 713, in render
 self.doc_tmpl.build(fis)
File "/usr/lib/python2.5/site-packages/reportlab/platypus/doctemplate.py",
line 730, in build
 self._startBuild(filename,canvasmaker)
File "/usr/lib/python2.5/site-packages/reportlab/platypus/doctemplate.py",
line 693, in _startBuild
 pageCompression=self.pageCompression)
File "/usr/lib/python2.5/site-packages/reportlab/pdfgen/canvas.py",
line 183, in __init__
 self._make_preamble()
File "/usr/lib/python2.5/site-packages/reportlab/pdfgen/canvas.py",
line 245, in _make_preamble
 iName = self._doc.getInternalFontName(self._fontname)
File "/usr/lib/python2.5/site-packages/reportlab/pdfbase/pdfdoc.py",
line 267, in getInternalFontName
 raise PDFError, "getInternalFontName(%s) called for a dynamic font" %
repr(psfontname)
reportlab.pdfbase.pdfdoc.PDFError: getInternalFontName('Helvetica')
called for a dynamic font

I've found a hack on the forum that I should modify in canvas.py the
_make_preamble to this:
 def _make_preamble(self):
     self._preamble = ''

This will not give any erros to me but somehow it does still not work
for Helvetica (just the simple one, the variants like bold,italic are
working). Helvetica seams to map to the default fonts(looks like an
Arial to me)

Changing the name of the font in RML files is not an option. The
entire idea is to change the font set without changing the templates.
Just for your info: I've tried to change the font name to Helvetica2
in RML and on the registerFont and it does work, but i need to make it
work for "Helvetica" because I can't "update" the RML files from the
project.

Any idea?

-- 
Sorin Sbarnea