kerning after ligature

dglen12 Dec 2010

I was wondering if someone could comment on something I don't understand about kerning.

My font is named "dugud". The attached image shows two words "offkey" then "iffy". The ligatures in both are in red. In "offkey" there's ligature sub for "ffk". In "iffy" there's a ligature for "ff".

Note the arrows above. I can kern between the initial "o" in offset and the following "ffk" ligature (black arrow). I cannot kern at all between the "ffk" and the following "e" (orange arrow).

For the word "iffy" the situation is the same. At the black arrow I can kern, at the orange arrow I cannot.

The type sample was created in Illustrator. If I turn off ligature substitution I can kern everything.

Any thoughts?

Regards,

Doug

Attachment	Size
dugud lig problem.jpg	622.97 KB

Thomas Phinney12 Dec 2010#

It sure as heck sounds like a bug in Illustrator.

I'll flag this thread to some of our friends at Adobe and perhaps it can be looked into, and if it is an Illustrator bug it might get fixed in some future release.

Regards,

dglen13 Dec 2010#

Thanks Thomas.

Miguel Sousa13 Dec 2010#

Thanks for bringing this problem to our attention. I have confirmed the incorrect functioning and submitted a bug.

msmiths14 Dec 2010#

This is funny, I've experienced it before and thought that it was just the way it is. I noticed that a workaround is to kern the ending letter pair beforehand and it would reflect once the ligature was activated, if that makes sense. It will be nice to have a fix for this.

andi aw masry15 Dec 2010#

IMHO, Illustrator is indeed so have not "friendly" with otf feature, LoL. But the problem also would be recheck to the "kerning classes" groups definition. I Just remembering you. Think, In this case, kerning for "k" and "f" should be separate to be two session:
"k" ----> "k_left" and "k_right". Same way for
"f" ----> "f_left" and "f_right".

And then:
"ffk" should be completely grouping with "k_left" and "f_right", and
"ff" should be completely grouping with "f_left" and "f_right"

I hope this correct.
Nice to introducing you.
Best regards.

Thomas Phinney18 Dec 2010#

@andiawmasry: I don't think you understand the bug report. You can't do *manual* kerning in Illustrator between the ligature and a following glyph. It's nothing to do with whether the font's built-in kerning was properly constructed. (Though it would be interesting to see if Illustrator also fails to correctly use the built-in kerning between a ligature and a following glyph.)

Cheers,

andi aw masry31 Jul 2011#

@Thomas ... you're right ... I've already mixed up FL and Illustrator :-)
Thanks

Best regards

Ravi Kiran4 May 2013#

This issue no longer happens in Illustrator CS6 - looks like it has been fixed.

Cheers,
RK

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