On 2015-01-20 04:55, Zdenek Wagner wrote:
If I understand the scaling attribute correctly, let say, you have
scaling=1.4 and you request \normalsize which id 10pt. Fontspec will
multiply it and request 14pt font size instead. If there is an optical
size available, it will be used.
This last was my question: will the scaling attribute in Fontspec
automatically use an optical size (or since scaling will probably not
result in an exact optical size, will Fontspec scale the closest optical
size).
...how do I know whether a font supports optical
sizes (and which specific sizes it has)?
fontinfo -z FILENAME
There isn't any 'fontinfo' program on our Linux system, and I couldn't
find such a program in a websearch. (There is a Firefox plugin by that
name, written by Jonathan Kew, but that doesn't seem to be what you're
referring to. Also some libraries for Python etc.) There is however a
"font information" dialog box in FontForge. One of its tabs is "Size".
For the font I'm working with (MvElaafNormal.otf.ttf), the "design size"
shows up as 0.0 pts. I suspect that means there are no optical sizes in
this font.
But none of the other fonts I looked at with FontForge (including Charis
SIL and several free Adobe fonts) have anything but 0.0pts in the
"design size". Maybe it's only very high end fonts that have multiple
optical sizes? In which case I've been on a wild goose chase worrying
about whether Fontspec's scaling function will choose the appropriate
optical size...
Mike Maxwell
University of Maryland
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