[DejaVu-bugs] [Bug 26882] New: U+FB00 - U+FB04 issues with strong hinting

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=26882

           Summary: U+FB00 - U+FB04 issues with strong hinting
           Product: DejaVu
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Sans
        AssignedTo: dejavu-bugs at lists.freedesktop.org
        ReportedBy: jacopods at gmail.com


Created an attachment (id=33755)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=33755)
Example

I am using Sans 7pt; please note that the issue appears with "medium" or
"strong" hinting style; with "slight" or "none" there is no problem. Please see
the attached screenshot.

On the left side you see what happens when typing the word "diffff"
notice that when passing from a single 'f' to the ligature 'ff'(U+FB00) (, the
first 'f' is displaced to the left by 1 px. When adding whatever letter
afterwards (in this case another 'f'), a 1px space is added; adding the forth
'f' again moves the third 'f' to the right by 1px, but does not fill the gap.

On the right side you see what happens when typing the word "dififi"
Again when passing from a single 'f' to the 'fi'(U+FB01) glyph, the first 'f'
moves 1px to the left (and almost forms a "ligature" with the previous i). This
time adding a letter afterwards doesn't add the 1px gap previously noticed.

Similar issues appear with the other ligatures fl, ffi and ffl 

--Thanks


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