Re: [ft] Modifying/Enhancing the Truetype Interpreter

[Moony]

> It's not very difficult, I believe.  You probably have to add some
> flags to one of the internal TrueType interpreter structures to store
> the results of the bytecode signature scanning.
>
> Do you have any ideas how many fonts are affected?  Which of them are
> important/well known?

Off hand, I know that MS core fonts would benefit from this.  
(Basically, any TT font that was hinted with B/W rasterization in 
mind).  Redhat Liberation fonts also seem to be hinted with B/W in mind, 
as they supposed to be metrically compatible with the core web fonts.

In my experience, the fonts that are already "optimized" for CT don't 
suffer nearly as badly.

> And finally, do you have a working ClearType
> emulation, this is, at least tripling the horizontal resolution for
> calling the bytecode interpreter, then compressing the results again
> for proper subpixel positioning?
>    
No, I do not.  I have tinkered with the code a bit, but haven't really 
had a chance to sit down and seriously try something.  I was thinking 
though-  is it even necessary to have a resolution to snap to in the X 
direction?  In this scenario perhaps grid-fitting to 1/3 pixel in the X 
direction would be considered "full hinting" and leaving the X direction 
alone entirely would be considered "slight hinting"?