[HarfBuzz] incorrect glyph positioning in vertical text with MS PMincho font

[Jonathan Kew]

On 13/1/15 18:23, Jonathan Kew wrote:
> Testcase:
>
> $ echo 4e10,ff41,ff42,ff43,ff44,ff45,4e11 | hb-unicode-encode | hb-view
> --font-file msmincho.ttc --face-index 1 --direction ttb
>
> results in poor positioning of the (proportionally-spaced) vertical
> variants of the fullwidth Latin glyphs.
>
>
> JK

Attaching a screenshot comparing Firefox (left, using harfbuzz; hb-view 
result is comparable) and Chrome (right, using ???) renderings of a 
similar testcase.

JK

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