>>> 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.
I guess Masamichi means that the mapping is not part of the font itself. >> 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. Hopefully there is a solution that makes Cairo do the mapping work for us... Werner
