Freetype changes

[Matthew Garrett]

I've reverted the changes that Scott made to Freetype, Xft and Cairo. 
This functionality is intended to improve rendering on LCD screens, but 
it's clearly failing to do so at the moment - vertical lines were being 
rendered across sub-pixel boundaries, resulting in increased colour 
blurring and reduced legibility. As an example, see 
http://www.codon.org.uk/~mjg59/tmp/blur.png - prior to the change, the 
vertical lines were solid white without any sub-pixel colouring.

However, the rendering quality in some other situations did seem to 
improve slightly. I'm uncomfortable with introducing this change this 
close to beta without a full discussion of the pros and cons of the 
change, and ideally I suspect we ought to defer it to post-UDS where we 
can get more feedback from experts in this field. Thoughts?

-- 
Matthew Garrett | mjg59 at srcf.ucam.org