[ft-devel] freetype-py python binding to FontVal's FreeType backend.

[Hin-Tak Leung]

I have forked freetype-py and added a few things and an example to make it 
possible to wrap
around FontVal's FreeType backend. It is easier than I thought - or maybe it is 
just time
thinking about it before actually getting my hand dirty.

It is on the "fontval-diag" branch of http://github.com/HinTak/freetype-py .

Assuming you are on Mac OS X, if you do:
   ./setup.py build
then
   LD_LIBRARY_PATH=... PYTHONPATH=build/lib/:$PYTHONPATH  
./examples/font-diag.py examples/Vera.ttf

You should get something like this:

--
Family name:         Bitstream Vera Sans
Style name:          Roman
Face number:         1
Glyph number:        268
Available sizes:     []

Size 10, SLOOP, Glyph ID 241, At ByteOffset 67 : 
_rast_W_FT_VALUE_OUT_OF_RANGE_SLOOP
Size 10, SLOOP, Glyph ID 244, At ByteOffset 67 : 
_rast_W_FT_VALUE_OUT_OF_RANGE_SLOOP
--

Where ... is a directory containing 
https://github.com/HinTak/Font-Validator/tree/master/bin/Darwin/ ,
and renaming "libfreetype.6.dylib" to "libfreetype.so.6" .
( see https://github.com/rougier/freetype-py/issues/47 )

Or you can try it with another font other than "Vera.ttf" shipped with 
freetype-py .

The instruction for python on windows should be similar, but taking
https://github.com/HinTak/Font-Validator/tree/master/bin/{Win32,Win64}, a bit 
of copying
and renaming. Sorry there is no instruction for linux -
because the necessary enhancement in freetype isn't  upstreadm yet :-).

The 50 lines or so of python code is essentially the python equivalent
of a simpler version of 
https://github.com/HinTak/Font-Validator/tree/master/Compat/Compat.cs .