[Webkit-unassigned] [Bug 69282] [chromium] some Japanese punctuation displayed wrong in vertical writing in Chromium Linux

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Mon Dec 12 18:31:11 PST 2011


--- Comment #6 from Koan-Sin Tan <koansin.tan at gmail.com>  2011-12-12 18:31:11 PST ---
(In reply to comment #5)
> If there is no vert table in the font, but there is Unicode corresponding vertical presentation form in the font, can we introduce a fallback mapping table so that those glyphs can be displayed?

There are two kinds of relevant tables/features. 
 1.  ‘vhea’/ ‘vmtx’ to provide vertical metrics
 2.  ‘vert’ or ‘vrt2’ GSUB features for mapping horizontal punctuations to vertical ones

It seems you are talking about 2. Yes, we can retrieve 'vert' or 'vrt2'  from a font with good font. But I think this should be a platform independent function instead of a Chromium specific one.

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