Created attachment 145007 [details]
After signing a signature line in ooxml, the background turns black (see attached screenshot).
This is probably a result of converting SVG to EMF for OOXML.
Please provide sample document where problems occur, and step by step instruction how to reproduce the issue.
1. Open attached document
2. Right click on the signature line, "Sign signature line"
3. Fill in your name, select a certificate, click "Sign"
Expected: Signature line is signed and has a transparent background.
Actual: Signature line is signed, but background is black (makes it unreadable)
Created attachment 146587 [details]
This is merely a display problem in LO. When opening the emf file in Word, the image is shown correctly.
Created attachment 146646 [details]
Attaching new bugdoc including an affected emf file.
No need to sign the document, just open this file to see the problem.
Created attachment 146648 [details]
Found out that this only happens in debug mode.
Repro Win LO 6.1 and 6.2 OpenGL, no repro 6.2 GDI, repro 7.1+ GDI, no repro Skia.
Repro GTK3, no repro Skia and GEN in Linux GTK3.