[Webkit-unassigned] [Bug 165009] New: Arabic hamza diacritic misrendering on Tahoma

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=165009

            Bug ID: 165009
           Summary: Arabic hamza diacritic misrendering on Tahoma
    Classification: Unclassified
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Macintosh
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ebraminio at gmail.com
                CC: mmaxfield at apple.com

Repro case:
data:text/html;charset=utf8,<div style="font-family:Tahoma;font-size:400%;">%D9%87%D9%94

Actual:
The first part from right is distanced from its base (Arabic Heh)

Expected:
Like Chrome and Firefox, it should be near the base letter.


AFAIK this is a font bug, but HarfBuzz on Firefox and Chrome have done some workaround for it so it can be considered ComplexPath/CoreText thus Safari bug.

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