> 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 %^> _______________________________________________ Freetype-devel mailing list Freetype-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/freetype-devel
