Re: [ft-devel] Turning off stem darkening by default until all drivers support it?

[Nikolaus Waxweiler]

Hm, so how about the following:
* FT_LOAD_TARGET_LIGHT is changed to mean "Use native Y-only-snapping 
with linear advances if driver and font supports it and Y-only 
autohinter with linear advances otherwise". That's broadly comparable to 
what happens on Windows with DirectWrite.
* FT_LOAD_INTEND_LINEAR_ALPHA_BLENDING_AND_GAMMA_CORRECTION is added so 
that a rendering library or toolkit can express its' intent to do what 
the flag says. This flag would then trigger stem darkening except the 
library user wants color bitmaps out of the font or something. Other 
caveats? What else would need to happen?

This would
1. provide something that works well now (CFF hinter for CFF fonts, 
autohinter for everything else) and can be added to in the future (full 
ClearType with linear advance widths support).
2. provide other libraries to make use of stem darkening as soon as they 
enable/implement the feature. No user has to suffer heavy glyphs.  And I 
have more time to work on making stem darkening generic within FreeType.

Everybody wins?