[XeTeX] CID-keyed font support?

[Akira Kakuto]

Dear Jiang Jiang,

>> In the case of dvipdfmx, we usually write in a map file,
>> cid-x.map for example, like
>> gbm  UniSourceHanSansJP-UTF16-H  SourceHanSansJP-Regular.otf
>> where gbm means a tfm:  gbm.tfm.

> Yes, I understand that and had spent quite amount of time getting such
> map file right, but I consider that approach less "XeTeX-like" as most
> XeTeX documents / setup should just work out of the box without
> tweaking in each TeX installation. The motivation for my initial patch
> is to make such map files unnecessary.

Yes, that is less XeTeX-like.
In the case of XeTeX-xdvipdfmx, we cannot use the kind of map file
for OpenType fonts. That is, we cannot load OpenType fonts through tfm fonts.

Thanks,
Akira