Typophile

Kerning problem

RadLuka

Hi,

I recently spotted an issue with kerning in FL.
In metrics window all kerning works fine but when i generate "kern" feature some pairs among classes are excluded. But it is only visible in OT preview and later in exported file. What interesting is, when I change the order of the code, e.g. I bring the missing pair to the top of the code, it works. Anyway the whole thing behave very random and I can't get the logic of this. I was searching the problem but didn't found the exact answer. Putting extra "subtable" doesn't fix the problem.

Hope it sounds clear.

Any suggestions would be highly appreciated.

Thanks,

Rad.

Jan Żurawski

Any error note or warning?

RadLuka

I'm not sure does it have any connection with the problem, but it shows up when compiled:
[WARNING] Start of new pair positioning subtable; some pairs may never be accessed: [E Eogonek Egrave Eacute Edieresis Ecircumflex AE Emacron Ecaron Edotaccent Ebreve] [igrave idieresis icircumflex imacron ibreve] [/Users/radek/Library/Application Support/FontLab/Studio 5/Features/fontlab.fea 596].

Jan Żurawski

Most probably you have the same glyph(s) in two kerning classes.
see: http://www.adobe.com/devnet/opentype/afdko/topic_feature_file_syntax.htm...
The suspect is in the line 596 of your .fea file

RadLuka

Ok, Thanks a lot, it fits to the problem. Does FontLab have any quick possibility to find all overlapping glyphs in classes, or I have to do it manually.

Thanks

Jan Żurawski

see: http://typophile.com/node/65149#comment-382760 and following.
[szukajka miejscowa nie działa za dobrze, używaj gógla: "site:typophile.com overlapping glyphs in classes"]

RadLuka

Thanks for the link and help.

RadLuka

Yeah, that was it. I cleaned everything and there's no errors. It is tricky that this issue also appears when same glyph is putted in one class twice, it can be missed while coping and pasting.

That problem was quite haunting me, so thanks a lot one more time.

Jan Żurawski

Great :)

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