issues with lbearing and optical bounds

[Pablo Rodríguez]

Hi there,

I just have created a derivative from GFS Baskerville
(http://www.ousia.tk/GrandjeanBaskerville-Regular.sfd.bz2). It only
corrects negative left bearings and adds those ones to optical bounds.

I experience two issues (the font was created using FontLab by the
people at the Greek Font Society [just in case it might help]:

The first one is that some glyphs (such as 1f9b) have negative zero
values after deleting their previous value. (I cannot tell it 100% sure
in all cases, but I think there where floating point values before
deleting their negative values). I don't have a very strong math
background, but I guess this is wrong, isn't it?

For some strange reason, optical bounds cannot be set with floating
comma values. I guess they should be able to have the same kind values
as the left and right bearings, shouldn't they?

I hope it helps. Thanks for your help,


Pablo

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[Barry Schwartz-2]

Pablo Rodríguez <oinos@...> skribis:

> I just have created a derivative from GFS Baskerville
> (http://www.ousia.tk/GrandjeanBaskerville-Regular.sfd.bz2). It only
> corrects negative left bearings and adds those ones to optical bounds.
>
> I experience two issues (the font was created using FontLab by the
> people at the Greek Font Society [just in case it might help]:
>
> The first one is that some glyphs (such as 1f9b) have negative zero
> values after deleting their previous value. (I cannot tell it 100% sure
> in all cases, but I think there where floating point values before
> deleting their negative values). I don't have a very strong math
> background, but I guess this is wrong, isn't it?

The left bearing is some tiny negative number that rounds off to
zero. If you don't like negative bearings then just move the glyph a
tiny bit further to the right. Or, better yet, use the
round-to-hundredths from the Element menu. (Or else round the font
to integers, but then it might need some adjustments.) Using Add
Extrema might be a good idea, too.

> For some strange reason, optical bounds cannot be set with floating
> comma values. I guess they should be able to have the same kind values
> as the left and right bearings, shouldn't they?

I myself don't know the answer to that question.



------------------------------------------------------------------------------
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is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
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