[Webkit-unassigned] [Bug 112488] REGRESSION (r145854): Mongolian characters are not upright in vertical writing mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=112488





--- Comment #49 from SiqinBilige <siqinbilige at gmail.com>  2013-06-15 09:05:39 PST ---
(In reply to comment #48)
> (From update of attachment 204687 [details])
> I don't think this is the right approach to the problem.
> Mongolian text is rendered with the complex path and the reason why this fails is because the font has vertical glyphs but this information gets lost when we get to the point of preparing the glyphs to draw.
> This fix will solve the problem only for Mongolian characters but not for all the other characters for which we should avoid rotation (those included in shouldAvoidRotation) when rendered with a font that has vertical glyphs for those characters.

Yes, you are right.
We believe you did work according the UTR#50. and you are did the best.
The problem is that the mongolian definitions in the unicode is not clear or the document about mongolian is not clear.
The fact is that all Existing Mongolian and Phags-Pa OpenType/TrueType/AAT fonts have counter-clockwise rotated glyphs.
We wrote a report about this in http://www.unicode.org/review/pri253/feedback.html.
May be there is mistake about english grammar, because  of my poor english.
The fast is that before this patch the all traditional home page is All OK, but is broken after the patch.

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