Signature form field flattening distortion issue

[Lonzak]

After fixing [#992] and [#1047] I have another case of distorted images after flattening.

This PDF is in landscape mode and contains fields with 90° rotation etc - the full program ...
When it is signed and then flattened the signatures are distorted:

On the first glance I didn't spot the error - I'll have to investigate deeper. But maybe someone already fixed this or knows where the problem is? @mkl-public :-D

[mkl-public]

You remember #992 (comment) ? I wouldn't be surprised if the decision back then to stick with /R for now comes back to haunt us now... ;)

Seriously, though, I'll take a look at the example file sometime the next days.

[Lonzak]

@mkl-public But the field does contain /R so normally it should be ok... (except they additionally fiddled with the matrix)

[Lonzak]

Page 1 (842.0x595.22) is rotated by 90°.
The signature fields are rotated as well, e.g. ll(x,y)=208.025; 55.179993 ur(x,y)=332.335 ; 70.77997 , rotation=90.
The image looks distorted so the coordinates seem to be handled incorrectly...