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Re: Cairo plans

From: Masamichi Hosoda
Subject: Re: Cairo plans
Date: Sat, 04 Sep 2021 21:12:15 +0900 (JST)

>> Most PDF readers have a mapping
>> from Adobe-Japan1 CID to Unicode code points as follows.
> Is it impossible to discover this mapping from the OTF file alone?

If I understand correctly, yes.

> Where does the OTF file say it is using encoding Adobe-Japan1-UCS

It is described in ROS in the CFF table.

ROS means `Registry-Ordering-Supplement`.
For the current HaranoAjiMincho-Regular.otf,
Registry is `Adobe`, Ordering is `Japan1`, and Supplement is `7`.
So it is an `Adobe-Japan1-7` font.

PDF readers use Adobe-Japan1-UCS2 for `Adobe-Japan1-*` fonts.

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