[Webkit-unassigned] [Bug 251753] Disconnected Arabic glyphs for embolden webfont

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=251753

--- Comment #2 from zalan <zalan at apple.com> ---
I noticed that some of the text (e.g. لتاريخ الميلادي:) was split into multiple runs and we painted them individually. Sometimes (incorrect) mismatching rounding directions could manifest in such subpixel gaps. However, after force-merging them all (so that لتاريخ الميلادي comes out as one TextRun) I was still able to see those tiny gaps, so this very well be a CoreText bug as you said. Myles, what do you think?

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