One TTF becomes larger in file size?

Göran Söderström
Göran Söderström Posts: 40
in Type Design Technique & Theory
I’m making five TTF’s. Manually hinted (Y-direction) from FontLab. It’s a typeface in five weights, interpolated, so the outlines are identical.

Everything was fine, until I manually added some new glyphs to all fonts, from another source document.  I copy/pasted these new glyphs, about . After that, one of the fonts became 100K instead of 70K upon export.

All five fonts share same classes, features, components, number of kerning pairs etc and I’m using the same settings to export them too.

What could possibly be the issue with that one single font? I’m totally stuck. Any ideas?

Comments

  • Malcolm Wooden
    Malcolm Wooden Posts: 58
    It could be a number of things, decomposed composites, VDMX or LTSH tables added, a different glyph order increasing the size of the cmap table.

    What you need in is a tool that can show you the tables in the font and the size of each table so that you can do a comparison of before and after.

    You could try TTX/FontTools to give you some detailed info of what is going on in each table of the fonts.

    A tool that does comparisons of two or more font files is a valuable tool which many foundries will have, and is often written in-house to suit their own work practices.
  • Georg Seifert
    Georg Seifert Posts: 680
    OTMaster helps a lot with this issues.
  • LeMo aka PatternMan aka Frank E Blokland
    LeMo aka PatternMan aka Frank E Blokland Posts: 764
    The free OTM 3.7 Light version (Mac OS, Windows, Linux) will be sufficient for this purpose, I reckon.
  • Christoph Koeberlin
    Christoph Koeberlin Posts: 51
    Feel free to send ’em over, mate. I’ll have a look.
  • PabloImpallari
    PabloImpallari Posts: 824
    Hi Goran, ¿are you exporting from Glyphs? if Yes, ¿the problem appears from the very first export, or only after you hint it and re-export from Fontlab?
  • Göran Söderström
    Göran Söderström Posts: 40
    Thanks! I’ll try OTM and see what could be the issue — and maybe learn something. If that does not help I’m definitely getting in touch with you Christoph (thanks for the offer!).

    Originally the document comes from Glyphs, but this happens after re-export from FontLab. On one font only.
  • Malcolm Wooden
    Malcolm Wooden Posts: 58
    We have just made a 'cut-down' version of one of our in-house tools to give a visual comparison of font tables. It's a simple 'one trick pony' called Font Table Compare which you can get here:
    https://dtptypes.com/software
    Available for Mac and Win...and free.
    enjoy!
  • Göran Söderström
    Göran Söderström Posts: 40
    Thanks, I’ll give it a go!

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