depends Thunar
depends ImageMagick

optional_depends "dcraw"           ""               "" "enables thumbnailing of raw images (required together with raw-thumbnailer)"
optional_depends "raw-thumbnailer" ""               "" "enables thumbnailing of raw images (required together with dcraw)"
optional_depends "grace"           "--enable-grace" "" "enables thumbnailing of grace files"
optional_depends "texlive"         "--enable-tex"   "" "enables thumbnailing of LaTeX files"
