Hi,
as suggested by Werner, I currently look into using outlines as a (considerably faster) means to detect rendering regressions. I do understand that the outlines of glyphs should definitely be checked. However, I wonder if it is enough to guarantee "no rendering regressions" by just comparing the outlines and without checking the rendered bitmaps?
To get a feeling for that matter, it would help me to understand where most changes of FreeType happen and where versions differ the most. Concretely: is the outline-to-bitmap algorithm definitive and final or is it subject to (probably subtle) changes every now and then?
Thanks for your input and have a wonderful weekend, everyone!
Armin