chaining context substitution - anchor problem

FontCreator - Font Editor FontCreator - Support
1

I have:

  • 2 classes: base glyphs & marks
  • mark positioning: base + mark (using the 2 classes)
  • chaining context substitution: backtrack (base), input (mark), substitution table (2 other marks)

What I’m trying to achieve is substitute mark A with mark B if a certain base is used. Separately,

  • mark attachment with a defined anchor works:
    img01.png
    img02.png
  • substitution works:
    img03.png
    img04b.png
    BUT using substitution plus mark attachment with a defined anchor doesn’t. When mark A is substituted with B, B is added to the right side of base ignoring the anchor (e.g. img04a above, or img04b from Word):
    img04a.png
    Interestingly, the preview in the OpenType Designer window shows them working correctly at the same time:
    img05.png
    Is there something I can do to make it work properly?

Thank you for your help,
Ninna

2

Not all shaping engines behave the same, so also try if it works in a Web Font test.

3

Thank you for your reply.
What I couldn’t figure out was why FC’s OT Designer preview showed it correctly, while FC’s Test Font preview didn’t.
Anyway, I feel silly to say the fault was mine, but maybe posting it here will help someone else in the future: the problem was caused by & solved (in the case of substitution marks):
Glyph Properties > (More>>>) > Extra Info > “Automatic” (Mark), which should have been “Mark”, not “Automatic”.

4

The OT Designer preview uses our own shaping engine. Test Font preview uses one that comes with Windows. And what the Web Font test uses depends on the web browser.

I am glad to know the problem is solved, although both Automatic (Mark) and Mark should produce the same font.

5

It didn’t in Word 365, so maybe there is some issue there. I’m just happy I got it to work :smiley: