Changing the Order of Precedence of OpenType Features

Get help with FontCreator here. Please do not post feature requests or bug reports here.
Post Reply
Bhikkhu Pesala
Top Typographer
Top Typographer
Posts: 9009
Joined: Tue Oct 29, 2002 5:28 am
Location: Seven Kings, London UK
Contact:

Changing the Order of Precedence of OpenType Features

Post by Bhikkhu Pesala »

I am sure that I used to be able to change the order by using the Up and Down arrows in the OpenType Designer.

In 9.1, they no longer have any effect. Has something changed that prevents this, or is there another way to do it? Suppose that I want Tabular Figures to be used if both Tnum and Onum are enabled?
Changing Order of Precedence.png
Changing Order of Precedence.png (157.68 KiB) Viewed 3428 times
My FontsReviews: MainTypeFont CreatorHelpFC13 Pro + MT10.0 @ Win10 2004 build 19041.746
MikeW
Posts: 618
Joined: Mon May 20, 2013 2:51 pm

Re: Changing the Order of Precedence of OpenType Features

Post by MikeW »

Hmm. I thought so too. Now only the lookups can move up/down.
Bhikkhu Pesala
Top Typographer
Top Typographer
Posts: 9009
Joined: Tue Oct 29, 2002 5:28 am
Location: Seven Kings, London UK
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Bhikkhu Pesala »

The features can be moved in the scripts, not where they're listed above the lookups, where they always appear in alphabetical order.
My FontsReviews: MainTypeFont CreatorHelpFC13 Pro + MT10.0 @ Win10 2004 build 19041.746
Erwin Denissen
Moderator
Moderator
Posts: 9140
Joined: Fri Oct 04, 2002 12:41 am
Location: Bilthoven, The Netherlands
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Erwin Denissen »

Bhikkhu Pesala wrote:Has something changed that prevents this, or is there another way to do it? Suppose that I want Tabular Figures to be used if both Tnum and Onum are enabled?
Regardless of the feature order, the lookup order is important.

So if you want Tabular Figures to be used if both Tnum and Onum are enabled, make sure the TabularFigures lookup is above the OldStyleFigures in the lookup list.

See the result:
LookupOrder.png
LookupOrder.png (120.17 KiB) Viewed 3423 times
Erwin Denissen
High-Logic
Proven Font Technology
Bhikkhu Pesala
Top Typographer
Top Typographer
Posts: 9009
Joined: Tue Oct 29, 2002 5:28 am
Location: Seven Kings, London UK
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Bhikkhu Pesala »

That's working for Balava, but not for OpenSans.
My FontsReviews: MainTypeFont CreatorHelpFC13 Pro + MT10.0 @ Win10 2004 build 19041.746
Erwin Denissen
Moderator
Moderator
Posts: 9140
Joined: Fri Oct 04, 2002 12:41 am
Location: Bilthoven, The Netherlands
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Erwin Denissen »

It should be, as this is the only way as far as I know.

OpenSans contains two lookups in onum as well as two lookups in tnum. What is not working?
Erwin Denissen
High-Logic
Proven Font Technology
Bhikkhu Pesala
Top Typographer
Top Typographer
Posts: 9009
Joined: Tue Oct 29, 2002 5:28 am
Location: Seven Kings, London UK
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Bhikkhu Pesala »

I noticed the pairs of lookups and moved both of them, and tried moving the lookups in the Moldavian and Romanian scripts too, but I still cannot get Tnum to override Onum whatever I do, if they are both enabled. There's a Pnum feature too, and that won't override Onum either.

Here is my modified version.
My FontsReviews: MainTypeFont CreatorHelpFC13 Pro + MT10.0 @ Win10 2004 build 19041.746
Erwin Denissen
Moderator
Moderator
Posts: 9140
Joined: Fri Oct 04, 2002 12:41 am
Location: Bilthoven, The Netherlands
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Erwin Denissen »

I find the substitutions rather confusing. Maybe they didn't work the way you think they should work.
Erwin Denissen
High-Logic
Proven Font Technology
Bhikkhu Pesala
Top Typographer
Top Typographer
Posts: 9009
Joined: Tue Oct 29, 2002 5:28 am
Location: Seven Kings, London UK
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Bhikkhu Pesala »

The lnum, onum, pnum, and tnum features were already in the font when I started work on it to added ordn, ornm, and frac.

I am easily confused. I will look at some of my older fonts, and see if I can sort out a system that works how I want.

At least the up and down arrows are working as intended to reorder the lookups.
My FontsReviews: MainTypeFont CreatorHelpFC13 Pro + MT10.0 @ Win10 2004 build 19041.746
Erwin Denissen
Moderator
Moderator
Posts: 9140
Joined: Fri Oct 04, 2002 12:41 am
Location: Bilthoven, The Netherlands
Contact:

Re: Changing the Order of Precedence of OpenType Features

Post by Erwin Denissen »

Since the regular digits in OpenSans are already monospaced, the TabularFigures are a little different than usual.

From what I understand; In case both onum and tnum are enabled and TabularFigures comes after OldstyleFigures, the TabularFigures undo what OldstyleFigures did. If the order is different, then TabularFigures is doing nothing, and then OldstyleFigures does its work.
Erwin Denissen
High-Logic
Proven Font Technology
Post Reply