[DejaVu-bugs] [Bug 23659] New: Tall glyphs like U+1EA2 (A+hook above) are clipped out and unreadable on Firefox/IE

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Sep 2 15:57:53 PDT 2009


http://bugs.freedesktop.org/show_bug.cgi?id=23659

           Summary: Tall glyphs like U+1EA2 (A+hook above) are clipped out
                    and unreadable on Firefox/IE
           Product: DejaVu
           Version: unspecified
          Platform: Other
        OS/Version: Windows (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Sans
        AssignedTo: dejavu-bugs at lists.freedesktop.org
        ReportedBy: seelie317 at faireal.net


Created an attachment (id=29126)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=29126)
A  sample to reproduce the problem on Firefox/IE

When the glyph is very tall, for example,
U+1EA2 [ Ả ] LATIN CAPITAL LETTER A WITH HOOK ABOVE
U+1EAE [ Ắ ] LATIN CAPITAL LETTER A WITH BREVE AND ACUTE
its highest part is clipped out on my Windows XP SP3,
and the character may get practically unreadable:
for example, U+1EA2 looks like 
U+00C1 [ Á ] LATIN CAPITAL LETTER A WITH ACUTE
because only the base of the hook is shown, and you can't read it
as 'A with HOOK ABOVE'; similarly U+1EAE looks like
U+0102 [ Ă ] LATIN CAPITAL LETTER A WITH BREVE

This problem appears to happen only when some kind of rendering (DrawTextEx
etc.)
is used on Windows and doesn't happen on Notepad,
so technically this may be Windows' problem,
but it does happen on my Firefox and IE8.
Other fonts (Charis SIL, Courier New, Tahoma, Times New Roman, etc.)
don't have this problem, and work just fine on Firefox or IE.

Steps to Reproduce: View test.html (I'm attaching) by firefox or MSIE
Actual Results: LATIN CAPITAL LETTER A WITH HOOK ABOVE looks like
LATIN CAPITAL LETTER A WITH ACUTE and other similar problems.
Expected Results: These are two different glyphs.
Build Date & Platform: Windows XP SP3
 USP10 version 1.0626.6001.18000
 DejaVu Sans Version 2.30
Additional Information: Other fonts do not have this problem.

This is my first report here. I did read the Guidelines but
correct me if I'm not doing right.


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