FreeType settings for AntiAliasMode=4 with HintingMode=3

What's it mean when HintingMode = 3 and AntiAliasMode = 4?

; Auto light-way hinting
HintingMode = 3
; Light+LCD (RGB) antialiasing
AntiAliasMode = 4

In 2013, Adobe contributed its CFF rasterizer engine and hinting engine. From FreeType version 2.5, this became the default engine.

FreeType's hinting engine has two different modes: FreeType and light-way. The autohinter works significantly differently with the light antialias mode, however Adobe's engine behaves consistently in all of FreeType's antialias modes.

So, the light-way mode is deprecated, if Adobe hinting engine is used.

References:

• https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_LOAD_TARGET_LIGHT
• https://www.freetype.org/freetype2/docs/text-rendering-general.html