[Webkit-unassigned] [Bug 186010] REGRESSION (Mountain Lion-Mavericks): Incorrect font used to render decomposed grapheme cluster in some cases

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186010

--- Comment #11 from mitz at webkit.org ---
Attached screenshots showing how even the test case from bug 68287 regressed between Mountain Lion and Mavericks.

In Mountain Lion, Core Text had the ability to tell us that we could use Verdana for the combining character sequence i+circumflex, even though Verdana didn’t have a glyph for the combining circumflex alone. The fix for bug 68287 was to take advantage of this ability, which was already benefiting the Cocoa text system.

In Mavericks, that Core Text ability was gone. It regressed WebKit, but also the Cocoa text system, as can be seen with TextEdit.

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