[Freetype] Light text on dark background

[spiffgq]

I’m writing a program that uses Freetype2 for font loading.  The problem is 
thin fonts (for example, arial.ttf and cour.ttf at 12 point) do not look 
good when rendered as light colored text on a dark background.  The 
characters look smudged or half-erased.  Does any one have any good ideas on 
how to prevent this?  I think it may be caused by the anti-aliasing of the 
glyphs, but I don’t know how to turn off the anti-aliasing to test if that 
is the case.  Any ideas?  Thanks for your help. 

Daniel Royer