The "useafm" option is designed to work with the 14 standard Postscript
fonts. I suppose it's possible to use a third-party afm, but such a
thing would be extremely rare. The closest thing to Arial in the
standard PS fonts is Helvetica.
But yes, this is a bug, only in that the error message could be better,
not that using Arial as an AFM would ever work.
As for reducing file sizes, are you already using ps.fonttype set to 3?
That will subset a TTF font, and should reduce file sizes over type 42.
Cheers,
Mike
Marco A. S. Netto wrote:
> Hi everyone
>
> I'm a matplotlib's beginner user and I had a problem that seems to be
> a bug. If I enable the option ps.useafm and I ask for a font that is
> not available in my OS, the matplotlib's font manager tries to get a
> default font, which is Vera (I don't know how the default font is set
> to Vera, since I removed it from the font.serif and font.sans-serif
> lists). The problem is that the font manager is getting a ttf file, in
> my OS it is located at
> /usr/share/fonts/truetype/tf-bitstream-vera/Vera.ttf. Therefore I'm
> getting the error:
>
> Could not match Arial, normal, 400. Returning
> /usr/share/fonts/truetype/tf-bitstream-vera/Vera.ttf (this line is
> showed when I use the option --verbose-helpful)
> ...
> ...
> ...
> File "/usr/lib/python2.5/site-packages/matplotlib/afm.py", line 295,
> in __init__
> parse_afm(fh)
> File "/usr/lib/python2.5/site-packages/matplotlib/afm.py", line 281,
> in parse_afm
> _sanity_check(fh)
> File "/usr/lib/python2.5/site-packages/matplotlib/afm.py", line 76,
> in _sanity_check
> raise RuntimeError('Not an AFM file')
> RuntimeError: Not an AFM file
>
> Is this a bug? Shouldn't matplotlib try to get an AFM default font,
> rather than a ttf font, in case it cannot find what I'm looking for
> (with ps.useafm=True)? In my case I put the font Arial but matplotlib
> was not able to find it. Some details: I'm using ubuntu hardy and
> matplotlib version 0.98.3. backend PS to generated eps files. My
> decision to use AFM is to reduce the file sizes.
>
> Kind regards,
> Marco
>
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