>> Most PDF readers have a mapping >> from Adobe-Japan1 CID to Unicode code points as follows. >> https://github.com/adobe-type-tools/mapping-resources-pdf/blob/master/pdf2unicode/Adobe-Japan1-UCS2 > > 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. https://docs.microsoft.com/en-us/typography/opentype/spec/cff http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf 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.
