bugThe FreeType Project - Bugs: bug #19873, Legendum font wrongly displayed...


bug #19873: Legendum font wrongly displayed when faking bold with FT-2.3.4 (using autohinter)

Submitted by:  Pablo Rodríguez <ousia>
Submitted on:  Mon 14 May 2007 09:32:58 PM UTC  
Severity:  3 - Normal Item Group:  None
Status:  Wont Fix Privacy:  Public
Assigned to:  Werner LEMBERG <wl> Open/Closed:  Closed
Planned Release:  None

Add a New Comment(Rich Markup)

You are not logged in

Please log in, so followups can be emailed to you.


Tue 01 Nov 2016 03:12:44 AM UTC, comment #5:

The FreeType emboldener is sensitive to errors in contour orientations, i.e., the wrong orientation would inverse the direction of emboldening, making some parts thinner. There is no way to diagnose the orientation errors in FreeType currently.

In fact, you can consider these emboldening artifacts as a diagnostic of the problem fonts. :) This is a feature, rather than bug.

Alexei Podtelezhnikov <podtelez>
Project Member
Fri 20 Mar 2009 12:47:58 PM UTC, comment #4:

The correct solution is probably to first embolden the glyphs,
then autohinting the character.

I mention this here explicitly so that it won't get forgotten.

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Mon 21 Apr 2008 11:06:16 PM UTC, comment #3:

The problem occurs for all hinting settings,
no matter whether the byte code interpreter is used or the
autohinter and even turning off hinting completely
doesn’t help.

Mike FABIAN <mfabian>
Mon 21 Apr 2008 11:02:33 PM UTC, comment #2:

The problem when emboldening the gulim.ttc font can
be easily seen with the command:

xfd -start 63744 -fa "Gulim:weight=200:pixelsize=27"

(Same problem with the other three faces in gulim.ttc,
i.e. “Dotum”, “GulimChe”, and “DotumChe”).

A screenshot is available here:


Mike FABIAN <mfabian>
Mon 21 Apr 2008 10:52:31 PM UTC, comment #1:

The same problem is seen with FT-2.3.5 and the
Korean font gulim.ttc (from Windows Vista).

For details see


Mike FABIAN <mfabian>
Mon 14 May 2007 09:32:58 PM UTC, original submission:

As shown in the attachment below, FT-2.3.4 seems to have problems to fake bold characters in Legedum's lowercase and uppercase acute accented letters. Just in case it helps, FT uses autohinter.

This happens in both the upright and slanted fonts (also attached).

Thanks for your excellent work,


PS: this was previously reported in bug 18875, but since the issue is different, I think it would be better to close bug 18875 (since it has been fixed).

Pablo Rodríguez <ousia>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

Attached Files
file #12768:  wronglegndmbold.png added by ousia (43KiB - image/png)
file #12769:  legendum.tar.bz2 added by ousia (61KiB - application/x-bzip)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -email is unavailable- added by podtelez (Posted a comment)
  • -email is unavailable- added by wl (Posted a comment)
  • -email is unavailable- added by mfabian (Posted a comment)
  • -email is unavailable- added by ousia (Submitted the item)

    Do you think this task is very important?
    If so, you can add your encouragement to it.
    This task has 0 encouragements so far.

    Only logged-in users can vote.




    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-11-01 podtelez StatusNone => Wont Fix
        Open/ClosedOpen => Closed
    2009-03-20 wl Assigned toNone => wl
        SummaryLegendum font wrong displayed when faking bold with FT-2.3.4 (using autohinter) => Legendum font wrongly displayed when faking bold with FT-2.3.4 (using autohinter)
    2007-05-14 ousia Attached File- => Added wronglegndmbold.png, #12768
        Attached File- => Added legendum.tar.bz2, #12769

    Back to the top

    Powered by Savane 3.3