Problem in Chrome?

Micha Mirck

Opening https://beautifulwebtype.com/zilla-slab/ in Chrome or Edge doesn't display the four different figure sets, but only the default figures. In firefox it is right. Does anyone know more about this issue?



But when an extra gylph is added to Chrome it works....???

Khaled Hosny

An explanation here would be that since digits are assigned Common script, Chrome is trying to shape them with DFLT OpenType script and the font does not have lookups under DFLT script. Adding a Latin letter will cause them to be shaped with latn OpenType script. Firefox may be falling to Latin when no script is detected.

Erwin Denissen

Actually the font contains one lookup in the DFLT script (in the Slashed Zero feature), so removing the DFLT script solves the issue.

I'll add this inconsistent behaviour between web browsers in this forum post:

OpenType Layout Feature Support Differences - (Complex) Shaping Engine

Microsoft Edge has a similar issue.

Micha Mirck

I'm not done testing yet, but it seems dat DFLT is needed. FiraSans works fine and has this code:

feature lnum { # Lining Figures

 # Latin

    sub @lnum1 by @lnum2;

 language AZE ; # Azeri

 language AFK ; # Afrikaans

 language PLK ; # Polish

 language TRK ; # Turkish

 language MOL ; # Moldavian

 language ROM ; # Romanian

 language CAT ; # Catalan

 language TAT ; # Tatar

 language CRT ; # Crimean Tatar

 language KAZ ; # Kazakh

 script DFLT; # DEFAULT

    sub @lnum1 by @lnum2;

 script grek; # Greek

    sub @lnum1 by @lnum2;

 script cyrl; # Cyrillic

    sub @lnum1 by @lnum2;

} lnum;

Erwin Denissen

I think the feature code misses script latn;

feature zero {
	language dflt;

Should be:

feature zero {
	script latn;
	language dflt;

Georg Seifert

If you have any feature that is using ‘script latn’, then all other features need to be registered for ‘dflt’ and ‘latn’.


you can do that like this

feature xxxx {

  lookup xxxx_a {
    sub a by b;
  } xxxx_a;

  script latn;
  lookup xxxx_a;
} xxxx;

Micha Mirck

George. I just now noticed your reply. Thank you very much!