LO doesn't support WMF StretchBlt MR and shows nothing.
Steps to Reproduce:
Open attached WMF sample.
LO shows empty object.
It should show a small rectangle filled with color gradient.
User Profile Reset: No
tdf#142708 has a sample of StretchBlt variant w/o bitmap.
Created attachment 172712 [details]
WMF sample with StretchBlt with bitmap
Created attachment 172713 [details]
How it should look like
Created attachment 172714 [details]
WMF BitBlt with 32bpp bitmap
Looks like BitBlt implementation of "with bitmap" variant is also incomplete.
It seems to have incorrect support for 1bpp bitmaps only.
Created attachment 172715 [details]
How BitBlt with 32bpp bitmap should look like
Confirm with Version: 184.108.40.206.alpha1+ / LibreOffice Community
Build ID: ec629c5ee22d02f99d66a5cf975ce239876b7f4d
CPU threads: 4; OS: Linux 5.11; UI render: default; VCL: gtk3
Locale: cs-CZ (cs_CZ.UTF-8); UI: en-US
Bartosz Kosiorek committed a patch related to this issue.
It has been pushed to "master":
WMF tdf#55058 tdf#142722 Add implementation of BitBlt and StretchBlt
It will be available in 7.2.0.
The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.