[DejaVu-bugs] [Bug 26940] New: Stacked diacritics don't stack

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=26940

           Summary: Stacked diacritics don't stack
           Product: DejaVu
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Sans
        AssignedTo: dejavu-bugs at lists.freedesktop.org
        ReportedBy: maxwell at umiacs.umd.edu


When I attempt to put two combining diacritics over a single base character,
the correct behavior is that the second one should stack above, rather than
overstrike, the first one.  This doesn't work; instead, the second diacritic
appears at the same height as the first one, resulting in an overstrike.

This is probably reproducible with many pairs of diacritics, but here's a test
case: ASCII 'a' followed by combining macron (U+0304) followed by combining
acute accent (U+0301).

I have reproduced this using the latest release of the Sans font (version 2.30;
it also happens with 2.29) under several scenarios: 
(1) in Microsoft Word 2003 on-screen (under Windows Vista)
(2) in the PDF produced by (1) using PDFCreator
(3) in a PDF produced under Linux using XeTeX
(hence my claim that it affects all platforms, which of course I haven't
tried!)

I attach a PDF produced using method (2), at 16 points.  It can be reproduced
at several point sizes, although again I haven't tried every size.

A similar bug report, but allegedly only relevant to Windows XP, is 9009.

(BTW, I can't seem to set the 'Version' field in this bug submission form.)


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