> When a font is not begin the TTAG_ttcf we assume it should be an
> SFNT and read the next 2 bytes as numTables. We then check every
> table to be sure that it does is an SFNT.
>
> In some extreme cases, the checking could take a long time. I know
> that `OTTO', `true', 0x00010000, 0x00020000 are good tags. Are
> there others? If there are not too many good tags, I guess should
> check the tag before checking tables.
I'm not aware of any other tag, so it seems that your idea makes
sense. Maybe a compromise is useful too, this is, to check for a
mandatory table, then for the tag, then for the remaining tables.
Opinions?
Werner
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