Re: [ft-devel] gamma correction and stem darkening

[Nikolaus Waxweiler]

> For high-quality output with gamma correction, I think I need both:
> (1) native hinting for TrueType fonts -- otherwise tricky CJK fonts
>      fail
> (2) stem darkening -- otherwise the text is too light after gamma
>      correction

This is actually what I have in mind. The idea is to get the TrueType 
driver to a point where it can be enabled for FT_LOAD_TARGET_LIGHT. 
What's blocking this from my point of view is:

1) To get stem-darkening working with native TrueType hinting, subpixel 
hinting/full ClearType handling is needed, specifically the backwards 
compatibility mode that hides behind #define 
TT_CONFIG_OPTION_SUBPIXEL_HINTING -- and is not really ready for public 
consumption. I need it so that I can freely darken on the X-axis.
2) So far, I failed miserably in understanding how this entire TrueType 
hinting and ClearType stuff works so my attempts to do something about 
it got nowhere.

Your best bet is probably to find ways to detect tricky fonts somehow or 
postpone your work to a future release. No idea which one, though...