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

From: fantasai <fantasai.lists@inkedblade.net>
Date: Wed, 24 May 2017 00:03:35 -0400
To: John Hudson <john@tiro.ca>, www-style@w3.org
Message-ID: <69d5a9c7-bd9b-504e-f38c-bae0e8d96905@inkedblade.net>
On 05/04/2017 01:23 PM, John Hudson wrote:
> 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.

Luckily the line ordering is entirely under control of the CSS engine,
so that part is covered correctly by 'writing-mode'. :)

Received on Wednesday, 24 May 2017 04:04:23 UTC

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