RE: [ft-devel] [FYI] MingLiU identifier

[David Bevan]

> In general scope, I think, you raised a concern that
> the checksum in TTF header is too simple (it's a sum
> of 32-bit values of the table) to guarantee the identity.
> It's reasonable.

My concern is that the (small) tables may actually be the same in a variety of 
fonts.

> If I check the fonts bundled to Microsoft Windows,
> Mac OS (Classic & OS X), and distributed in GNU/Linux
> distribution and I find no conflict, is it sufficient
> guarantee? 

That seems reasonable.

> If not, I cannot access wider coverage
> of the fonts, so, the possible solution would be...
> 
> 1) identify by family name comparison is used too,
>    and add a fallback by sfnt table checksum.
> 
> 2) in addition to the tag-name of the table and
>    the checksum, the length should be checked.
>
> 3) if it's still insufficient... should we use
>    our own hash value instead of the checksum
>    in sfnt header.

Only 1) would address my concern.

David %^>