On Wed, 2007-10-10 at 14:03, Mark E. Shoulson wrote:
> When editing U+FB4F HEBREW LIGATURE ALEF LAMED, I find that adding
> anchor points only gives me one of each, set to type "Base Char". The
> "Base Lig" type is greyed-out and inaccessible. But I know it's
> possible; I think that's what it used to do, and I have seen proper
> multiple ligature-appropriate anchors when reverse-engineering other
> Hebrew fonts.
You must define a mark to ligature lookup before you can use base
> This is even when the character's OT glyph class is explicitly set to
> "Base Ligature" (and not left on Automatic).
This is irrelevant in this context.
> (actually, I even tried hacking the SFD file, copying the syntax from a
> reverse-engineered Hebrew font. It showed up as a ligature anchor, but
> the "Base Lig" type was still greyed-out, even though it was selected,
> whereas in the other font it was normal. I put the SFD back the way I
> found it)
Don't do that. You can't have a base ligature in a mark-to-base lookup,
the OT formats are different.