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

[Nikolaus Waxweiler]

So Alexei noted that he found stem darkening too strong. And it got me 
thinking again. As long as cairo/Qt5/Skia and others don't ship with 
LAB+GC by default on their X11/Wayland backends, maybe enabling it by 
default for the CFF driver and autohinter just creates angry users and 
more work for packagers?

Currently, stem darkening is done inconsistently, so using the native 
TrueType and Type1 engines won't get you any darkening. Maybe I should 
work out general support for all drivers first and *then* I can try 
convincing packagers to ship with it enabled, plus enabled versions of 
e.g. Qt5 and Skia?

This would also lead to more consistent rendering if we really change 
the meaning of FT_LOAD_TARGET_LIGHT to mean "Use native Y-only-snapping 
if driver and font supports it and Y-only autohinter otherwise".