Hi Hans,
many thanks for having released the new beta.
I experience opposite results with opbd. The first sample is:
\definefontfeature[default][default][protrusion=quality, opbd=yes]
\definefontfamily[mainface][rm][Linux Libertine O]
\setupbodyfont[mainface, 300pt]
\setuppagenumbering[location=]
\setupalign[hanging]
\showframe
\starttext
W
\stoptext
Although the value for that lfbd is only -29, the W is moved too much
from its original position.
The second sample is (font attached at
https://mailman.ntg.nl/pipermail/ntg-context/2018/092527.html):
\showframe
\definefontfeature[default][default][protrusion=quality, opbd=yes]
\definefontfamily[mainface][rm][TestOPBD]
\setupbodyfont[mainface, 60pt]
\setupalign[hanging]
\starttext
Ἠ\\
Ἠ\hfill Ἠ\\
Ἦ\hfill ὩὩ\\
ἯἯ\hfill ὩὩ
\stoptext
Here the changes are tiny. The right values are used in the image at
https://github.com/wspr/fontspec/issues/282#issuecomment-287155442.
Could you check it?
Many thanks for your help,
Pablo
--
http://www.ousia.tk
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