[Libreoffice-bugs] [Bug 128292] New: Thumbnail generator: black background

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=128292

            Bug ID: 128292
           Summary: Thumbnail generator: black background
           Product: LibreOffice
           Version: 6.3.2.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: LibreOffice
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: contact at gnos.in

# Context
GNOS Project (https://gnos.in) relies on LO thumbnails (generated by LO and
zipped at Thumbnails/thumbnail.png) to generate odt/odc/odp files previews.

# Description
Since version 6.3, thumbnails get a black background (instead of the white one
present in 6.2 and previous versions) rendering most file previews unusable.

# Steps to reproduce

- Install LO 6.3.2 on Ubuntu from ppa:libreoffice/ppa 
- Create any document, save
- Unzip
- Check Thumbnails/thumbnail.png with any image viewer

- Expected behaviour: the preview should have a white background
- Actual behaviour: the preview has a black background

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