[Webkit-unassigned] [Bug 255972] New: Some Arabic fonts are not being shaped correctly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255972

            Bug ID: 255972
           Summary: Some Arabic fonts are not being shaped correctly
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: saadat.mateen at gmail.com
                CC: bugs-noreply at webkitgtk.org

# Platform details

Epiphany version: 44.1
WebKitGTK: 2.40.1
GStreamer: 1.22.2
Distributor: Fedora Linux 38 (Workstation Edition)

# Issue

Text set in some Arabic fonts is not being shaped correctly. Depending on the font, following issues are occurring:

1. Vertical positioning of glyphs is incorrect.
   URL: https://fonts.google.com/noto/specimen/Noto+Nastaliq+Urdu

2. All marks (dots/diacritics) are in wrong positions, and separate lines of a paragraph are jumbled.
   URL: https://fonts.google.com/specimen/Mada

3. Some diacritics are incorrectly positioned.
   URL: https://fonts.google.com/noto/specimen/Noto+Sans+Arabic

Examples of various other Arabic fonts with incorrect shaping may also be seen at https://fonts.google.com/?subset=arabic&noto.script=Arab

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