[luatex] Get area of a glyph?
Arno.Trautmann at gmx.de
Sun Sep 16 12:43:05 CEST 2012
again a rather unusual question: I'd like to get the black area of a
glyph. Why? To estimate it's greyness: For a “–” e.g. I want to get
something like “5%” (of the whole box surface), while a “m” would give
some “30%”, and a black box of course would result in 100%. Of course I
would also be happy with any absolute value like “0.1 square inches” or
whatever. So: Is there any chance to read such a value from inside
LuaTex? Or is this information not available?
In the end, I want to estimate the greyness of a document based on the
amount of “ink” used instead of Paul's (great!) ansatz in his TUGboat
article based on the stretching and shrinking of glue.
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