[Webkit-unassigned] [Bug 130840] New: Add Support for Glyph-level mirroring

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=130840

           Summary: Add Support for Glyph-level mirroring
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fred.wang at free.fr
                CC: cfleizach at apple.com, mrobinson at webkit.org
            Blocks: 123018


Created an attachment (id=227948)
 --> (https://bugs.webkit.org/attachment.cgi?id=227948&action=review)
testcase

Currently, Font::glyphDataForCharacter accepts a mirror boolean to apply Character-level mirroring. However it does not allow to apply Glyph-level mirroring. See

http://www.microsoft.com/typography/OTSPEC/TTOCHAP1.htm#ltrrtl

This is needed for MathML operators such as integrals or sums, that don't have character-level mirroring defined in Unicode. 

In Blink & Gecko with the XITS fonts installed, the attached testcase shows mirroring of the bracket (character-level) and sum (glyph-level). The latter relies on the 'rtlm' feature of the XITS. Note that for MathML purpose, all what is needed is a way for Font::glyphDataForCharacter to use the rtlm substitution table, not to implement the font-feature-settings CSS property.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.