Thank you for asking that question, Alex.
filters-graphics.odt (Writer version of filter.graphics)
filters-graphics.ods (Calc version of filter.graphics) (added 2015-11-18)
(filter.graphics is hand-extracted from graphicfilter.xcd)
:~$ /opt/libreoffice5.0/program/soffice.bin --version
LibreOffice 5.0.0.5 437e4abdf9e72fd0a6e6f8697a0e659bc77f9b10
:~$ cat filter.graphics | wc -l
31
Obtained from /opt/libreoffice5.0/share/registry/graphicfilter.xcd; Debian 6.0:
:~$ cat filter.graphics | sort
"BMP - Windows Bitmap" image/x-MS-bmp Extensions:bmp
"CGM - Computer Graphics Metafile" image/cgm Extensions:cgm
"DXF - AutoCAD Interchange Format" image/vnd.dxf Extensions:dxf
"EMF - Enhanced Metafile" image/x-emf Extensions:emf
"EPS - Encapsulated PostScript" image/x-eps Extensions:eps
"GIF - Graphics Interchange Format" image/gif Extensions:gif
"HTML Document (Draw)" text/html Extensions:html htm
"JPEG - Joint Photographic Experts Group" image/jpeg Extensions:jpg jpeg jfif jif jpe
"MET - OS/2 Metafile" image/x-met Extensions:met
"MOV - QuickTime File Format" application/movie Extensions:mov
"PBM - Portable Bitmap" image/x-portable-bitmap Extensions:pbm
"PCD - Kodak Photo CD (192x128)" image/x-photo-cd Extensions:
"PCD - Kodak Photo CD (384x256)" image/x-photo-cd Extensions:
"PCD - Kodak Photo CD (768x512)" image/x-photo-cd Extensions:pcd
"PCT - Mac Pict" image/x-pict Extensions:pct pict
"PCX - Zsoft Paintbrush" image/x-pcx Extensions:pcx
"PGM - Portable Graymap" image/x-portable-graymap Extensions:pgm
"PNG - Portable Network Graphic" image/png Extensions:png
"PPM - Portable Pixelmap" image/x-portable-pixmap Extensions:ppm
"PSD - Adobe Photoshop" image/vnd.adobe.photoshop Extensions:psd
"RAS - Sun Raster Image" image/x-cmu-raster Extensions:ras
"SGF - StarWriter Graphics Format" image/x-sgf Extensions:sgf
"SGV - StarDraw 2.0" Extensions:sgv
"SVG - Scalable Vector Graphics" image/svg+xml Extensions:svg svgz
"SVM - StarView Metafile" image/x-svm Extensions:svm
"SWF - Macromedia Flash" Extensions:swf
"TGA - Truevision Targa" image/x-targa Extensions:tga
"TIFF - Tagged Image File Format" image/tiff Extensions:tif tiff
"WMF - Windows Metafile" image/x-wmf Extensions:wmf
"XBM - X Bitmap" image/x-xbitmap Extensions:xbm
"XPM - X PixMap" image/x-xpixmap Extensions:xpm
If this helps then please show you like it with an uptick (∧)