Patching CalculiX Graphics to fix flipped screen hardcopy
Since some time, I’ve had the problem that generating hardcopy images from
cgx doesn’t work properly; the pictures are inverted vertically.
At first, I thought this might have been a change in
cgx. But comparing
the source code for
cgx.c for 2.16 up to and including 2.19, I don’t see
anything that would explain it.