Re: [ft-devel] GX support now working

[Dave Arnold]

Note that Type 1 and CFF fonts that follow the "Black Book" guidelines and 
avoid self-intersecting outlines will render correctly with either fill rule. Adobe 
rasterizers typically use even-odd at small sizes and non-zero at larger sizes.

-Dave

On 6/4/2015 12:19 PM, Behdad Esfahbod wrote:
> On 15-06-04 12:15 PM, Alexei Podtelezhnikov wrote:
> > On Wed, Jun 3, 2015 at 4:28 PM, Behdad Esfahbod <address@hidden> wrote:
> > > TrueType fonts have a 'non-zero winding' fill rule, whereas Postscript has
> > > 'even-odd'.  That's what causes the artifacts.
> > FT_OUTLINE_EVEN_ODD_FILL is never set by freeetype. So actually
> > FreeType always uses non-zero winding rule even for TrueType.
> I thought TrueType *is* non-zero.  I also thought Type1 / CFF are even-odd.
>
> > More so, the outer outline is always filled on the inside regardless of
> > the direction (ftgrays.c:1285).
> Right.  That's what non-zero means.  Doesn't matter if positive or negative.
>
>
> > FreeType is less sophisticated and resort
> > to what works the best even for broken fonts.