[Bug 738264] New: LiberationMono have different metrics for different styles

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Wed Sep 14 12:38:13 UTC 2011


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Summary: LiberationMono have different metrics for different styles

https://bugzilla.redhat.com/show_bug.cgi?id=738264

           Summary: LiberationMono have different metrics for different
                    styles
           Product: Fedora
           Version: 15
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: unspecified
          Priority: unspecified
         Component: liberation-fonts
        AssignedTo: psatpute at redhat.com
        ReportedBy: rkagan at mail.ru
         QAContact: extras-qa at fedoraproject.org
                CC: petersen at redhat.com,
                    fonts-bugs at lists.fedoraproject.org,
                    psatpute at redhat.com, i18n-bugs at lists.fedoraproject.org
    Classification: Fedora
      Story Points: ---
              Type: ---


Description of problem:

LiberationMono Bold and Italic fonts have metrics different from Regular and
BoldItalic.  This results in various artifacts, e.g. misaligned bold text in
xterm or gnome-terminal at certain resolution and font size.

Version-Release number of selected component (if applicable):
liberation-mono-fonts-1.07.0-1.fc15.noarch

How reproducible:
100%

Steps to Reproduce:
1. using freetype-demos package:

# for f in /usr/share/fonts/liberation/LiberationMono-*; do
  ftdump $f | grep -e postscript -e ascent -e descent
done
   postscript: LiberationMono-BoldItalic
   ascent:          1705
   descent:         -615
   postscript: LiberationMono-Bold
   ascent:          1707
   descent:         -615
   postscript: LiberationMono-Italic
   ascent:          1707
   descent:         -615
   postscript: LiberationMono
   ascent:          1705
   descent:         -615


Actual results:

ascent for different styles is different.  As a result, at 106 dpi at size 10
pt the rounded ascent is different, too.  This makes bold characters misaligned
in xterm and gnome-terminal (when used with freetype-2.4.6)

Expected results:

all metrics are the same

Additional info:

Full details are available in freetype bug
https://savannah.nongnu.org/bugs/index.php?34156.

version 1.06 didn't have this problem.  It looks like it's due to the changes
introduced to fix bug 591559.

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