DSIG and other issues

Folks,

I am traveling this week and won't be able to join the telcon tomorrow, we will resume next week.

One issue that was discussed recently at the MPEG font list about DSIG is the reliance of some of the Windows  applications on DSIG presence to distinguish OT fonts from TTF, and by extension, to use this distinction to enable the OpenType layout features. It is not clear whether only certain applications are affected, or any that use the underlying Win API, but this is something we may need to investigate because of the WOFF2 spec recommendation to remove DSIG because it will be compromised by pre-processing and reconstruction steps. What we may consider instead (or in addition to) is to remove the DSIG table while encoding a font and recreate a dummy DSIG (if the original font had it) to preserve font compatibility with Win API. Let's give it a time to discuss it at the next telcon (on May 28).

Thank you,
Vlad