Re: [Devel] new fixes

[Artur Zaprza?a]

David Turner wrote:
>      2/ What has changed since:
>
>        the "default" computations have been modified in order
>        to accomodate David Chester's blue scale patch (which
>        requires un-rounded scaling factors to be really
>        effective)
>
>        the truetype callback has also been modified especially
>        to recompute the pixel sizes and scaling factors according
>        to the TrueType spec/rounding , as well as to not store
>        these new values in the root metrics of the corresponding
>        FT_Size object. Instead, the "new" metrics are stored in
>        a hidden location (named here "metrics2") that are not
>        available to the rest of the engine.
>
>        however, there have been subtle bugs in this re-implementation,
>        and I now hope that things are correct.

My notes to the latest patch for ttdriver.c.
The formula:
  ( (xxx)       / 72 + 32 ) & -64
should be rounded in two places (though the difference is very small):
  ( (xxx + 36)  / 72 + 32 ) & -64
which is equivalent to:
  ( (xxx + (36+32*72)) / 72 ) & -64


--
Artur Zaprzala