[ft] Extract glyph contours using native units

[Charles Matthew Chen]

Hi,

   I'm trying to extra unscaled glyph contours.  For example, if the
units_per_em is 1024 and the raw values in the .otf file is 512,512,
how do I configure freetype to return (512, 512) and not values scaled
to a certain pixel size, ppem, etc.?

   I'm assuming the answer is to call FT_Request_Size(), but I can't
determine the correct values for the FT_Size_Request passed to that
function.

Thanks,
   Charles