[Libreoffice-bugs] [Bug 123452] New: Big file size due to missing compression of the Pictures Directory in LibreOffice 6.x

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=123452

            Bug ID: 123452
           Summary: Big file size due to missing compression of the
                    Pictures Directory in LibreOffice 6.x
           Product: LibreOffice
           Version: 6.0.6.2 release
          Hardware: x86-64 (AMD64)
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: LibreOffice
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: andreas.friesen at elmos.com

Description:
Testing the LibreOffice 6.1.5 for company usage I've seen that formally compact
files are getting big, if saved with LibreOffice 6.x.
Specially Files with EMF pictures.
Making a copy of the files to [formername].zip and enter them with an archive
browser I've found that the new Libre Office does not compress the EMF files.
With the actually used version 5.3.7 the EMF files in the directory 'Pictures'
have a high compression rate.

Steps to Reproduce:
1. Generate an ODT file and import one ore more graphics.
2. Open the file with an older version (e.g. 5.3.7) and SaveAs.
3. Open the file with an actual version (e.g. 6.1.5) and SaveAs.
--> compare the file sizes

Actual Results:
The file saved with 6.1.5 has the size of the uncompressed graphics.
The file saved with 5.3.7 is much smaller.

Expected Results:
the file sizes should be similar.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Tested with

Setup 1:
Version: 6.1.5.2 (x64)
Build-ID: 90f8dcf33c87b3705e78202e3df5142b201bd805
CPU-Threads: 4; BS: Windows 6.1; UI-Render: Standard; 
Gebietsschema: de-DE (de_DE); Calc: group threaded

Setup 2:
Version: 5.3.7.2
Build-ID: 6b8ed514a9f8b44d37a1b96673cbbdd077e24059
CPU-Threads: 4; BS-Version: Windows 6.1; UI-Render: Standard; Layout-Engine:
neu; 
Gebietsschema: de-DE (de_DE); Calc: group

Setup 3:
Version: 6.0.6.2
Build-ID: 0c292870b25a325b5ed35f6b45599d2ea4458e77
CPU-Threads: 4; BS: Windows 6.1; UI-Render: Standard; 
Gebietsschema: de-DE (de_DE); Calc: group

Setup 4:
Version: 6.0.7.3
Build-ID: 1:6.0.7-0ubuntu0.18.04.2
CPU-Threads: 4; BS: Linux 4.15; UI-Render: Standard; VCL: gtk3; 
Gebietsschema: de-DE (de_DE.UTF-8); Calc: group

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