[ft] Modifying/Enhancing the Truetype Interpreter

[Moony]

In reference to:
http://www.microsoft.com/typography/cleartype/TruetypeCleartype.aspx

The above whitepaper goes into some detail about the inner workings of 
Cleartype.  (Many people often refer to the subpixel rendering 
capability in Freetype erroneously as "Cleartype", even though Cleartype 
does much more than just subpixel rendering.)  I'm interested in using 
the details described in this whitepaper to make a patch (official or 
unofficial, don't care) to enhance the existing TT interpreter in 
Freetype.  The enhanced TT interpreter would probably be most useful 
with AA or subpixel, but not with B/W, where the existing TT is 
preferable.  Essentially it would modify the TT interpreter to ignore 
DELTAP instructions in the X direction under various conditions.

It looks like the main gist of the paper is in the sections "ClearType 
Asymmetric Super-sampling" and "DELTAP and SHPIX".  I know very little 
about the instructing of TT fonts, much less the inner workings of 
Freetype.  So, my questions are:

* Is anybody with more knowledge / experience with TT instrucing / 
Freetype willing to attempt to implement this enhanced TT interpreter?
* How difficult of a problem is this?  Is this feasible?

Regardless, I will be playing with the TT code in Freetype (and I'm sure 
learning things along the way).  I realize that there are a limited 
(although very popular) set of fonts that are well-hinted for the 
screen, but I think that in certain pixel ranges (10-17) this method of 
interpreting looks substantially better than most alternatives, and is 
well worth it for fonts you are looking at for 10+ hours per day.

Thanks,
Moony