"FileExt"	"Function"	"Args"
"tiff"	"tiff"	"filename=filename;height=height;width=width;units=size.units;res=resolution;compression=$lzw"
"pdf"	"cairo_pdf"	"filename=filename;height=height;width=width"
"png"	"png"	"filename=filename;height=height;width=width;units=size.units;res=resolution"
"svg"	"svg"	"filename=filename;height=height;width=width"
"eps"	"postscript"	"file=filename;height=height;width=width"
