Re: [ft] Decomposing complicated glyphs

[Michiel Kamermans]

On 4/5/2010 5:08 AM, Ian Britten wrote:
> So, can you confirm then that outer boundaries are always stored in 
> one direction, and islands/holes are stored in the other?
> [ I'm not familiar with the TT file format.  I could experiment, but 
> I'd rather not base my final solution just on observations... ]

Technically it simply looks at directional nesting. The outermost vector 
will go in one direction, a contained vector in the other, a contained 
vector in that, original direction, a contained vector in that, the 
other, etc. etc.

Note that while programs like FontForge save fonts in such a way that 
the outermost vector is always counter-clockwise, this is not a 
requirement for TrueType outlines, so you may encounter fonts that don't 
follow that rule, and are perfectly legal TTF.

- Mike "Pomax" Kamermans
nihongoresources.com