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Re: [css-writing-modes] Vertical upright Mongolian intrinsic orientation

From: John Hudson <john@tiro.ca>
Date: Thu, 4 May 2017 10:23:45 -0700
To: www-style@w3.org
Message-ID: <59b6a474-4bfe-c932-4bfb-83c8164ad6d7@tiro.ca>
On 04/05/17 07:39, fantasai wrote:

> Mongolian needs to be rotated sideways, however, because that's how 
> current
> font technology works IIRC.

Correct. Mongolian fonts are designed with glyphs pre-rotated 90° 
counter-clockwise, and the layout model used is horizontal. For correct 
vertical display of the script, the lines of text need to be rotated 90° 
clockwise *and ordered from left to right*. The last bit is where a lot 
of software seems to fail. It's easy to typeset a block of LTR 
horizontal text and rotate it 90° CW, but then the lines are ordered 
right to left.

J.


-- 

John Hudson
Tiro Typeworks Ltd    www.tiro.com
Salish Sea, BC        tiro@tiro.com

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Received on Thursday, 4 May 2017 17:24:21 UTC

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