Files
odfstudio/filter
Christian Lohmaier 725b107b1d add helper to rewrite timestamps in zip files to SOURCE_DATE_EPOCH
for reproducible builds, the timestams of zip members must not depend on
checkout date or file creation dates, the metadata should be clear of
those effects.

Only timestamps are rewritten since we want custom order/storage options
for open document files / our make rules should already have
deterministic order (or that determinism is just one additional $(sort…)
call away)

Change-Id: I49341cf3252d5ef5c092508c789fd188f21dc8df
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/207142
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Jenkins
2026-07-14 15:14:42 +02:00
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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.