Comment 9 for bug 615787

Note: that the version included in 0.70 is a from-scratch rewrite by Dalton Maag and not based on Ben's pragmatic code or implementation (although Ben definitely gets credit for the inspiration). The current solution is effectively using a large table of delta exceptions, which only exist for the range 9–69 ppem, meaning that it is not possible to differentiate between >=69 ppem and having the hint engine disabled. If this proves a problem we can probably look into using a more pragmatic method later.

High-level GUI source can be found with:

  strings -a sources/VTT/Ubuntu-*-hinting.ttf | grep -A10 0xf000