Re: U.F.O. 3 Implementation Questions

Frank,

if it helps i can send you an array of UFO’s; the same font, generated as UFO’s from different apps.
You can diff between the fontforge UFO and the other apps UFO’s.
Might reveal some pointers.

I’ll put them on gist as soon as i grab time.

-v

On 6 Dec 2013, at 12:18, Frank Trampe <[email protected]> wrote:

> Hi, folks.
> 
> I'm working on adding support for U.F.O. 3 to Fontforge. I've worked on Fontforge before, but I'm not yet an expert on the code base and have some questions. Dave suggested that I post these to the main list in order to get added perspective and depth.
> 
> As things stand, the U.F.O. handler writes out only values that Fontforge uses (except when dealing with lib.plist), I think. For example, a value specified for PostscriptOtherBlues in an incoming U.F.O. would not appear in output.
> 
> Is this a problem? If so, we would need to extend internal data structures and s.f.d. in order to losslessly accommodate foreign information, unless some feature like this already exists. Thoughts?
> 
> Dealing with stuff in the data directory is similarly tricky since Fontforge isn't a native U.F.O. editor; perhaps s.f.d. could have an extension for an associated support files folder that gets copied into any exported U.F.O.s. Thoughts?
> 
> Do we want to implement openTypeNameRecords? What's the corresponding Fontforge entity?
> 
> Looking at fontforge/woff.c, it seems that the WOFF metadata just gets dumped as a string, which is not how U.F.O. expects it. Can somebody send me a sample WOFF file with metadata so that I can test conversions?
> 
> Fontforge (judging from the code) seems to store layers as children of splinechars and also as children of splinefonts, and U.F.O. (judging from the specification) seems to store them as parents of glyphs. Can somebody explain this scheme better to me?
> 
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