[MS-WMF] 126.96.36.199.2 defines a BitBlt "without bitmap" variant.
LO doesn't support it.
Steps to Reproduce:
Open attached WMF sample.
LO shows two overlapping rectangles.
It should have two overlapping rectangles and three copies of the overlapping area in around.
User Profile Reset: No
One of the smaller rectangles has negative YDest value and one has negative "Width" to allow testing for such cases.
Created attachment 172686 [details]
WMF sample of BitBlt w/o bitmap
Created attachment 172687 [details]
How it should look like
Created attachment 172688 [details]
HOw it looks like in LO
Created attachment 172710 [details]
WMF sample of StretchBlt w/o bitmap
According to Bartosz BitBlt and StretchBlt implementation is almost identical.
Adding a sample for StretchBlt w/o bitmap.
Created attachment 172711 [details]
StretchBlt in LO and MS Paint side by side