I agree. Please report again as soon as there is a concensus; it
> should be straightforward to adjust FreeType to whatever the result
> is.
In FT_GlyphSlot, the positive y-offset is up.
https://www.freetype.org/freetype2/docs/reference/site/ft2-base_interface.html#bitmap_left
> I was making a test sbix font where I wanted the image not to have
> its lower left corner at 0,0 (which seems to be what most sbix fonts
> do). I ended up with different results from FreeType, CoreGraphics,
> and DirectWrite/Edge. [...]
Thanks for your investigation!
> That being said,
I was making a test sbix font where I wanted the image not to have its
lower left corner at 0,0 (which seems to be what most sbix fonts do). I
ended up with different results from FreeType, CoreGraphics, and
DirectWrite/Edge. The specification is difficult to interpret so I opened
an issue for
