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    • Strange rendering of one letter in on-line PDF reader

    Posts: 14
    edited October 2015 in Type Design Software
    Hello,
    My client, an advertising office, designs a magazine for on-line previewing based on PDF. Unfortunately, one single letter of the font is rendered with a strange shape around the letter. Accented letters A are affected (single A is fine). The letters look OK in InDesign as well as in Acrobat.

    I did everything I could to avoid this problem: I changed direction of curves, I added a few redundant nodes, I did place the shape of Á to another glyph position. The Á is still rendered with the black shape.

    Any idea what could be a source of this strange behaviour?




    Thanks,
    Filip


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    Comments

    • Posts: 100
      open contours?
    • Posts: 14
      No. I tried to export the font from Glyphs, FL Mac, FL Win, still the same issue. Maybe it is a bug of the rendering software but all other glyphs are rendered properly. And as I mentioned, the bug is only related to the online previewing tool.
    • Posts: 58
      Contour direction or double contours?

      Are you hinting with an old version of ttfautohint? (current version is 1.4)
    • Posts: 14
      I double checked directions and double contours... I will try to check the hinting, I used the default setting so far. Thanks.
    • Posts: 310
      It might be a hinting issue, but on the other hand it could also be an incorrect OpenType layout feature. If you need help, do let me know and I'll look into it.
    • Posts: 148
      Have you tried rendering the same type in a different piece of software that can also export to PDF? Sometimes PDF can be really weird, and rendering isn't always a problem in the font itself.
    • Posts: 3,355
      Sometimes PDF can be really weird, and rendering isn't always a problem in the font itself.

      Yes. Get a description of the PDF creation workflow from the client.
    • Posts: 265
      Sometimes PDF can be really weird, and rendering isn't always a problem in the font itself.

      I've noticed this, ever get /I or /l stem thickness rendering really wide/bold, with all other characters rendering correctly?

    • Posts: 1,747
      edited October 2015
      That's a known thing. It happens in Acrobat when type has been converted to outlines. Rectangular glyphs get heavier. It's a side effect of a rendering trick designed to boost the visibility of thin lines. Fonts are not affected unless they are converted to simple (unhinted) vector shapes.

      More here: 
    • Posts: 1,013

      @HoeflerCo @Acrobat Go to Acrobat > Preferences > Page Display > and uncheck "Enchance thin lines" under Rendering. Solves the problem!

      — Megan Anderson (@Megan_Anderson3) August 30, 2015
    • Posts: 148
      Dang, that's useful to know Stephen, thanks!

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