Feature ss04 and ss07 not working due to upstream issue

After build every feature seems to work except ss04 i.e. "simplified i".

[0xShamil]

As of 1.066, ss04 still does not work as expected

[arrowtype]

Hi @0xShamil, can you please let me know which fonts you are using (TTF/OTF/variable), and on which platform & app?

For me, these seem to be working on a random sampling:

This is FontGoggles 0.9.3, on macOS 10.15.5.

[arrowtype]

One thing that might solve your problem in the near term, potentially, would be configuring a custom build at

https://github.com/arrowtype/recursive-code-config

[zou000]

Seems related: In my case, the feature ss08 is not working. I built the custom font with the following config

# Family Name

# The name you want after "Rec Mono" in your custom fonts.
# Example: "Custom" will yield the family "Rec Mono Custom".
# Keep under 13 characters in length to avoid potential OS bugs.

Family Name: Custom

# -----------------------------------------------------------------------------
# Font Styles

# The variable axis values for the Regular, Italic, Bold, & Bold Italic fonts.
# See https://recursive.design for more information on these.

# MONO: 0 for Sans, 1 for Mono (or anything in-between)
# CASL: 0 for Linear, 1 for Casual (or anything in-between)
# wght: 300–1000 (realistically, about 400 for Regular & Italic and about 700 for Bold & Bold Italic)
# slnt: 0 to -15 (negative numbers are more slanted, and approximately equal to degrees of slope)
# CRSV: 0 (0 for Roman, 1 for Cursive)

Fonts:

  Regular:
    MONO: 1
    CASL: 1
    wght: 325
    slnt: 0
    CRSV: 0

  Italic:
    MONO: 1
    CASL: 1
    wght: 375
    slnt: -10
    CRSV: 1

  Bold:
    MONO: 1
    CASL: 1
    wght: 700
    slnt: 0
    CRSV: 0

  Bold Italic:
    MONO: 1
    CASL: 1
    wght: 700
    slnt: -10
    CRSV: 1

# -----------------------------------------------------------------------------
# Font Features

# Freeze in code ligatures? True or False
Code Ligatures: True

# Include font features to freeze in stylistic options. Copy them below to use.
# See README for details.

# These options only have an affect at CRSV<=0.5 (Roman/normal styles)
# ss01 # single-story a
# ss02 # single-story g
# ss03 # simplified f
# ss04 # simplified i
# ss05 # simplified l
# ss06 # simplified r

# These options affect both Roman & Cursive styles
# ss07 # serifless L and Z
# ss08 # simplified @
# ss09 # simplified 6 and 9
# ss10 # dotted 0
# ss11 # simplified 1

# (Keep the hyphen before each list item)
Features:
- ss03 # simplified f
- ss05 # simplified l
- ss07 # serifless L and Z
- ss08 # simplified @
- ss09 # simplified 6 and 9

# That’s it! See README for next steps.
~                                                                     

[zou000]

Turns out the problem I encountered was due to a comment error in the config file. Fixed in #7

[amsokol]

One thing that might solve your problem in the near term, potentially, would be configuring a custom build at

https://github.com/arrowtype/recursive-code-config

Hello,
ss04 is not working for me also. My environment is Win10 x64 20H2. I build recursive-code-config using WSL2 + Ubuntu 20.04.

Windows 10 font settings screenshot:
https://1drv.ms/u/s!Ar-rBqJF_BY5gbwFSJFWtL1ntSB0Yw?e=I2whod

My config.yaml:
https://1drv.ms/u/s!Ar-rBqJF_BY5gbwG0ZyILNoI0E9G5w?e=BmlNIc

Thank you.

[arrowtype]

Hi all, sorry about this mess-up.

If you're still interested, please try again with the latest commits. Thanks!

[arrowtype]

Nevermind; I now realize that I misunderstood this issue a couple of times.

I see now that trying to build the code fonts with ss04 does not apply the simplified i, as it should. Debugging now...

[arrowtype]

Okay, I think this might be partly due to a current limitation of the opentype-feature-freezer, twardoch/fonttools-opentype-feature-freezer#20. From there:

it won’t work if a glyph is only accessible only through a combination of multiple features, which is not a systemic limitation, just of the implementation.

For ss04, I think the simplified i is "only accessible only through a combination of multiple features." To get the i.simple glyph:

• rvrn changes the glyph from i to i.mono
• Then, ss04 changes i to i.simple and i.mono to i.simple

But also, most of the other stylistic sets work as expected, and the g, l, and r all have very similar substitution complexity – even with the exact same suffixing happening: normal to .mono, then .mono to .simple.

Still, maybe there is something unique that I’m not realizing which is disrupting the i? Perhaps the issue is that the i is made from components to start?

I’ve also found that ss07 (simplified italic diagonals) doesn’t work.

FWIW, I have also tried this outside of my main script, to reproduce: I used the FontTools Instancer to output a static mono family, then used pyftfeatfreeze to try to freeze in features. Again, things except for the ss04 & ss07 seemed to work.

[AlexPoulsen]

i think i may have run into this issue with ss03 and ss05 simplified f and l. they show as the regular unsimplified form in font book

[AlexPoulsen]

using 1.084, downloaded the repo earlier today

[arrowtype]

Hmm, ss03 and ss05 (simplified f and l) are working fine for me, in both VS Code and in Font Book:

Do they show up for you in your code editor? Which version of macOS are you on?