[Webkit-unassigned] [Bug 133569] New: The OpenType MATH table is not read on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133569

           Summary: The OpenType MATH table is not read on Mac
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Mac OS X 10.8
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: MathML
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fred.wang at free.fr
                CC: cfleizach at apple.com, mrobinson at webkit.org,
                    gur.trio at gmail.com
            Blocks: 122297


At the moment, the OpenType MATH table has been successfully read on EFL & GTK (I tested that) and Windows (Gurpreet tested that). From the screenshots provided by Chris, it seems that this does not work on Mac at the moment (I'm not sure for which version). This would require some debugging, for example:

1) Of the OpenTypeMathData::OpenTypeMathData function, to see if the table is well created and the headers validated.

2) Of the OpenTypeMathData::getMathVariants function, to see if sizeVariants and assemblyParts vectors are well created.

3) Of the OpenTypeMathData::getMathConstant function, to see if the constant is correctly read.

3) Of the RenderMathMLOperator::getDisplayStyleLargeOperator to see if the minheight and size variant is correctly picked.

For a minimal testcase, consider LayoutTests/mathml/opentype/large-operators-LatinModern.html (only one <mo> element is needed).

At the moment I can't do that myself.

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