Re: [Matplotlib-users] small bugfix in font_manager.py

Just out of curiosity, is anyone using the fontconfig way of mapping fonts?
 I turned it on one day, but the immediate problem was that no mathtext
worked any more; so I turned it back off.  Any mathtext in titles, labels,
etc. just rendered as a much of seemingly random letters.

And I'll tack a second question in here as well; the reason that I was
playing with fontconfig is that the font cache takes a really long time to
build in certain circumstances (I'm having trouble identifying exactly
when)....so I guess the question is...has anyone else seen this?  For
example, on my (2008 vintage) mac mini, a complete rebuild of the font cache
takes around 3 seconds, which is fine.  On a macbook pro (tested on three
different machines so far), it takes 30 seconds.  This makes no sense at all
to me, so any insights welcome :)

I initially thought that perhaps the other users had a ton more fonts than
I, but I don't think so...if I remember correctly, their font cache on the
macbook pro ended up being smaller than mine on the mini.


On Mon, Nov 29, 2010 at 10:10 AM, Michael Droettboom <md...@st...>wrote:

> The fontManager is essentially a replacement for what fontconfig
> provides on many platforms -- so it's intended that the fontManager
> doesn't exist if the user opts to use fontconfig.  However, that's still
> an "experimental" option because it hasn't been formally tested on many
> platforms, and, as you point out, there may still be code paths that
> aren't coded correctly for that option.
>
> Mike
>
> On 11/25/2010 10:34 AM, Benjamin Root wrote:
> > On Wednesday, November 24, 2010, Daniel Hyams<dh...@gm...>  wrote:
> >> MPL 1.0.0, OSX
> >> If USE_FONTCONFIG is turned on, the function
> FontProperties.get_size_in_points will sometimes fail, because it is wanting
> to use "fontManager", which is still 'None' if USE_FONTCONFIG is on.  I'm
> not sure if it's the proper way to fix it, but here is a small patch that
> works (meaning that at least the code doesn't die; I can't vouch for much
> else):
> >>
> >>
> >> ORIGINAL:
> >>      def get_size_in_points(self):        if self._size is not None:
>        try:                return float(self._size)
> >>
> >>              except ValueError:                pass        default_size
> = fontManager.get_default_size()        return default_size *
> font_scalings.get(self._size)
> >>
> >>
> >> NEW:
> >>      def get_size_in_points(self):        if self._size is not None:
>        try:                return float(self._size)            except
> ValueError:
> >>
> >>                  pass        if fontManager:            default_size =
> fontManager.get_default_size()        else:           default_size =
> rcParams['font.size']
> >>
> >>          return default_size * font_scalings.get(self._size)
> >>
> >> --
> >> Daniel Hyams
> >> dh...@gm...
> >>
> >>
> > I personally think that this is reasonable, as it guarantees a size
> > value to come from somewhere.  However, I am concerned about
> > fontManager being None. If it isn't a bug for it to be None at this
> > point, then I have to wonder where-else in the code needs a check for
> > None?  If it is a bug, then what should it be when USE_FONTCONFIG is
> > true?
> >
> > Good catch Daniel.
> >
> > Ben Root
> >
> >
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-- 
Daniel Hyams
dh...@gm...