2 Replies Latest reply: Oct 24, 2014 4:58 PM by nickop RSS

    Is a zero length glyf table valid for a TTF subset?

    nickop Community Member
    nickop Oct 23, 2014 11:02 PM

      I've posted related queries in a few forums - there is some background info at https://forums.adobe.com/thread/1611899 and it was suggested I ask the experts here

       

      Basically in some situations InDesign is generating a subset font with a zero length glyf table.

       

      Does this 'exists but zero length' table fulfil the criteria from the PDF specification?

       

      The following TrueType tables are always required: “head,” “hhea,” “loca,” “maxp,” “cvt_,” “prep,” “glyf,” “hmtx,” and “fpgm.”

       

      A number of programs are not happy with such files, but Adobe products seem to handle them. However Acrobat in particular is fairly forgiving as we all know.

       

      Microsoft's font validator says the subset is not valid. Programs like Ghostscript attempt to fix it by adding an empty table.