[Webkit-unassigned] [Bug 178564] New: Apple Coretext with Kannada nukta and consonant conjugate

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=178564

            Bug ID: 178564
           Summary: Apple Coretext with Kannada nukta and consonant
                    conjugate
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: parthakr at gmail.com
                CC: mmaxfield at apple.com

Created attachment 324339

  --> https://bugs.webkit.org/attachment.cgi?id=324339&action=review

Correct text

Summary:
following words uses nukta with the consonant conjugate
pizza ಪಿಜ಼್ಜ಼ಾ
gulf ಗಲ್ಫ಼್
waqf ವಕ್ಫ಼್
They have trouble rendering correctly in Safari with Apple CoreText. Also both Kannada Sangam MN and Kannada MN fails with this combination.

Below link demonstrates the same

http://kannadafont.blogspot.com/2017/10/case-14-nukta-in-consonant-conjugate.html

Steps to Reproduce:
Open the link http://kannadafont.blogspot.com/2017/10/case-14-nukta-in-consonant-conjugate.html
in Chrome and Safari and compare the text.

Expected Results:
Output seen with MurtyKannada font in Chrome
view: Chrome-Murty.png

Actual Results:
Broken text with Kannada Sangam MN and Kannada MN in Chrome
View: MNfont-Chrome.png

Broken text with MurtyKannada, Kannada Sangam MN and Kannada MN in Safari
View: Allfont-Safari.png

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