问题
I'm just asking myself, what are those bbox values printed out by:
gs -dSAFER -dNOPAUSE -dBATCH -sDEVICE=bbox myfile.pdf
%%BoundingBox: 46 911 1668 4537
%%HiResBoundingBox: 46.080002 911.520035 1667.520064 4536.000173
top-left-X, top-left-Y, ....?
And what's the measurement of those values (1/72")?
Thanks for helping
回答1:
These values are given in PostScript "points":
72 points == 1 inch
so yes, the measurement value is 1/72''...
The four values need to be read as two pairs of coordinates describing the lower left and the upper right corner points of a rectangle enclosing the bounding box.
The PostScript coordinate system has its origin in the lower left corner.
The 46 911 part is for the lower left corner point: 46 points distance from the right left edge and 911 points from the bottom edge.
The 1668 4537 part is for the upper right corner point: 1668 points distance from the right left edge and 4537 points from the bottom edge.
(Corrected a somewhat legasthenic error... Thanks to Scolytus for spotting it.)
来源：https://stackoverflow.com/questions/6250064/ghostscript-boundingbox-values