Hi Alexander,
Am 02.03.2018 um 11:35 schrieb Alexander Kobel:
...
I'd be glad about any concrete information or other suggestions.
Both slightly more concrete and another suggestion: wouldn't you be
better off with using the high-resolution bounding box determined by
GS from an actual rendering of the page? E.g.,
gs -sDEVICE=bbox -q -dBATCH -dNOPAUSE bbox.pdf
gives
%%BoundingBox: 0 0 480 136
%%HiResBoundingBox: 0.486000 0.432000 479.510774 135.017433
for your attached file. These numbers are as accurate as they can
reasonably expected to be: GS promises that the numbers are
conservatively rounded and accurate to 1 unit in the last place.
(Subject to theoretical limitations on Turing-complete page
description languages, I guess...)
Note that AFAICS the EPS generated by Lilypond has a white background
on the integer coordinates, so the values reported by GS will match
the numbers in the file. But since you use LuaLaTeX apparently, I
assume you include PDFs rather than EPSs, right? No need to work with
both formats, then.
HTH and doesn't add a whole lot of confusion,
Indeed it helps, thank you very much.
First I thought this is the solution.
Then the confusion came.
But now I think again that it's the solution :-)
I assume the difference between the BoundingBox and the HiResBoundingBox
is exactly what I'm after.
Unfortunately the box is shifted to a new origin: the lower left corner
now is the origin of the resulting image and not related to the staff
symbol anymore.
However, I can
- read the "rough" values from the original .eps file
- run your gs command on the final .pdf
- use the .eps values to shift the rectangle.
$ head -n 3 bbox-1.eps | tail -n 1
%%BoundingBox: -80 -37 400 1
$ gs -sDEVICE=bbox -q -dBATCH -dNOPAUSE bbox-1.pdf
%%BoundingBox: 0 0 480 38
%%HiResBoundingBox: 0.504000 0.522000 479.510774 37.025999
So I have to shift the X coordinates by -80 (the llx) and the Y
coordinates by -37 (the lly) to get
-79.504 -36.5222 399.519774 0.025999
I think this is the way to go and should actually be quite manageable.
Thanks everybody for the input!
Urs
Alex
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