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diff --git a/filter/README.md b/filter/README.md new file mode 100644 index 000000000000..78d469a6859f --- /dev/null +++ b/filter/README.md @@ -0,0 +1,25 @@ +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. |