[subset] Features don't get dropped

Hi. As opposed to my earlier post regarding dropping features after having frozen them with pyftfeatfreeze, I can’t seem to get the --layout-features setting right. When I use just --layout-features-='lnum,tnum,c2sc,smcp', all features disappear except for ccmp, locl, and liga. But there used to be more, like frac and ordn for instance. When I use --layout-features='*' --layout-features-='lnum,tnum,c2sc,smcp' all those feature (and the glyphs) stay in the font. Only the lnum feature seems to have disappeared.

I could of course calculate the precise amount of features and put it into --layout-features='XX', but I wanted to raise the issue anyway, because this doesn’t look right to me. Or am I doing something wrong?

The complete call is: python '/Users/yanone/Webseiten/wsgi/tools/pyftsubset.py' '/Users/yanone/Schriften/Font Produktion/Fonts/NonameSansOffice-Regular.temp.otf' --name-languages='*' --name-legacy --name-IDs='*' --unicodes='*' --layout-features='*' --layout-features-='lnum,tnum,c2sc,smcp' --output-file='/Users/yanone/Schriften/Font Produktion/Fonts/NonameSansOffice-Regular.otf'

[jenskutilek]

Example:

$ pyftsubset MyFont.ttf --unicodes='*' --layout-features='cpsp,mark,mkmk,rlig,ccmp,locl,subs,sinf,sups,numr,dnom,frac,lnum,pnum,tnum,onum,case,liga,ss14,ss04,ss06,ss09,ss10,ss13,ss20,calt' --glyph-names --notdef-glyph --notdef-outline --recommended-glyphs --name-IDs='*' --name-legacy

… successfully gets rid of all the small caps and petite caps glyphs for me.

[behdad]

If there’s a concrete proposal re aalt please file a new issue. We can add code to synthesize aalt, and add option to subsetter to call it.