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
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