Registering OTF fonts doesn't work

Test

Trying to register and then use an OpenType font:

const fs = require('fs');
const PDFDocument = require('pdfkit');

const doc = new PDFDocument({ layout: 'landscape' });
const stream = fs.createWriteStream('out.pdf');

// Register the font family
// OTF fonts don't work, TTF does!
doc.registerFont('Montserrat Bold', 'fonts/v5/Montserrat-Bold.otf');

doc
  .font('Montserrat Bold')
  .text('This is a test of the emergency broadcast signal.');

doc.pipe(stream);
doc.end();

Result

The font didn’t register. out.pdf rendered in Chrome or Firefox looks like this:

Expected result

Font embedded.

It works with TTF. This uses Montserrat Bold v5.001 OTF but I’ve tried other versions of Montserrat as well as other OpenType fonts. I couldn’t get any .otf to work.

Using directly doesn’t work either:

doc
  .font('fonts/v5/Montserrat-Bold.otf') // Doesn't work
  .text('This is a test of the emergency broadcast signal.');

Also tried to check in fontkit – no errors there.

fontkit.openSync('fonts/v5/Montserrat-Bold.otf');

[devongovett]

Should be fixed by https://github.com/foliojs/fontkit/commit/1a2a572b09ced7d2332f1bac1a66acfe960ecdb3 in the fontkit v1.7.8.

[blikblum]

I cannot reproduce the issue with master version. Probably fixed in the mean time.

I used the font from https://www.fontsquirrel.com/fonts/list/popular. The linked font gives a Unknown font format error