Files
odfstudio/filter
Stephan Bergmann b792c42325 Silence -Werror=maybe-uninitialized
...as seen at least with --disable-optimized against recent GCC 16 trunk,

> filter/source/msfilter/msdffimp.cxx:5810:24: error: ‘<unknown>’ may be used uninitialized [-Werror=maybe-uninitialized]
>  5810 |      mbSkipImages(false)
>       |                        ^
> filter/source/msfilter/msdffimp.cxx:239:1: note: by argument 2 of type ‘const SvxMSDffManager&’ to ‘DffPropertyReader::DffPropertyReader(const SvxMSDffManager&)’ declared here
>   239 | DffPropertyReader::DffPropertyReader( const SvxMSDffManager& rMan )
>       | ^~~~~~~~~~~~~~~~~
> filter/source/msfilter/msdffimp.cxx: In constructor ‘SvxMSDffManager::SvxMSDffManager(SvStream&, rtl::OUString, sal_uInt32, SvStream*, SdrModel*, tools::Long, Color, SvStream*, bool)’:
> filter/source/msfilter/msdffimp.cxx:5769:31: error: ‘<unknown>’ may be used uninitialized [-Werror=maybe-uninitialized]
>  5769 |      mbSkipImages (bSkipImages)
>       |                               ^
> filter/source/msfilter/msdffimp.cxx:239:1: note: by argument 2 of type ‘const SvxMSDffManager&’ to ‘DffPropertyReader::DffPropertyReader(const SvxMSDffManager&)’ declared here
>   239 | DffPropertyReader::DffPropertyReader( const SvxMSDffManager& rMan )
>       | ^~~~~~~~~~~~~~~~~

Change-Id: Ib1cb233e0208c8316db399c369a4879bca5b31eb
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/193058
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@collabora.com>
2025-10-28 07:53:01 +01:00
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LibreOffice Filters

Filter registration and some simple filters (also descriptions).

Desperate splitting of code into small shared libraries for historical reasons presumably (OS/2 and Windows 3.x). The libraries produced from the code in each subdirectory of filter/source/graphicfilter are graphic format import or export filters. But they don't have uniform API. Some have either a GraphicImport or GraphicExport entry point, and are loaded and used in a uniform fashion from code in svtools/source/filter/filter.cxx. Others have different API and are loaded from other places. For instance icgm has ImportCGM, and is loaded and used by sd/source/filter/cgm/sdcgmfilter.cxx (!). Svgreader is used for "File -> Open" and then to choose the svg file. For "Insert -> Picture -> From File", see svgio/source/svgreader directory.

Filter Configuration

The filter configuration consists of two parts, the type definition in filter/source/config/fragments/types/ and the actual filter definition in filter/source/config/fragments/filters/.

Each file type e.g. text file should be represented by exactly one type definition. This type can then be referenced by several different filters, e.g. calc text, writer text.