Adding OpenType features

FontCreator - Font Editor FontCreator - Support
1

Friends,
Just wondering if you can tell me following is possible:
I would like to see a single glyph be displayed while I type 2 glyphs (Latin with Microsoft BMP and Macintosh Roman mapping) but after typing both glyphs the glyph I would like to display does not have a standard mapping number instead I give it a unique name. e.g., for typing say “sy” I would like to see the special glyph be displayed.

Can I implement this feature using Font Creator as well as “OpenType Compiler”?

Sincerely,
Rabin

2

Yes. Glyph Substitutions are made using Postscript Names, not mapping values. Read the Tutorial thread on Adding OpenType features. You would give your sy ligature a postscript name such as “sy” and use a lookup table like this:

feature ligatures liga {
lookup ligaSub;
}

lookup ligaSub {

sub s y → sy;
}