Hi Kieren,
I did some checks on the absolute font-sizes:
- If you do a stencil-add on a stencil created via
grob-interpret-markup and interpret-markup inside a normal markup,
they exactly match-
- If you do a pixel by pixel compare (I did in gimp) a Lyric markup
with an abs-font-size with different global-staff-sizes, they also
match ...
... but you have to move the letter. IMO this is reasonable, because
different staff-sizes mean different scaling of anything else but
these absolute scaled fonts.
Now if you import a simple PDF with a single 'X' 42pt into
Libre/OpenOffice, it will show the found font-sizes of the
text-objects.
If you create the PDF with LibreOffice Century Schoolbook L 42pt and
reimport that PDF, you will have exactly 42pt.
If you create PDF files with an absolute-font-size of 42pt, it will
result in 41,9pt in the reimported file - regardless of the
global-staff-size.
AFAICS the font-size is absolute, but there seems to be a calculation
inaccuracy of 0.1pt.