Convert CFF fonts into OpenType fonts programmatically
Does anyone have any pointers where I can find extra information on how to create an opentype wrapper around a CFF font?
Currently I have a parser for CFF files so I can get all sorts of information out of it (cmap, glyph names, widths, names etc etc). Given this information I am unable to create an Opentype (truetype format like) wrapper so I can use the font on Windows using GDI; GDI will not load the Opentype font and the only thing I know is that it fails to load the font.
Does anyone know any additional information, validation applications, example code, get additional information why the font does not load from Windows etc etc?
Note: I am looking for information how to do it, not utilities and/or conversion tools.
Answer
Util now, I got 3 libraries as reference:
- FreeType: mainly in cff package, and main entry is cff\cffload.c, now in github
- FontForge: fontforge\parsettf.c, still in sf.net
- fonttools: fonttools\cffLib.py, in sf.net
- ots tools: http://code.google.com/p/ots/source/browse/trunk/src/cff.cc
In parsettf.c, George Williams write: True Type is a really icky format. ...now that I understand it better it seems better designed but the docs remain in conflict. Sometimes badly so.
IMO, the cff doc same bad. Maybe it better designed. Just maybe, if I have time:) I will confirm the maybe. Why? look at the creation time of those thing, too old.
What is better only if older? Parent, math and filosophy:) Anything others must uptodate!