Loads a font for later use. Before text is output with a loaded font it must be set with ps_setfont(). This function needs the adobe font metric file in order to calculate the space used up by the characters. A font which is loaded within a page will only be available on that page. Fonts which are to be used in the complete document has to be loaded before the first call of ps_begin_page(). Calling ps_findfont() between pages will make that font available for all following pages.
ps_findfont() will try to load the file passed in the parameter encoding. Encoding files are of the same syntax as those used by dvips(1). The contain a font encoding vector (which is currently not used but must be present) and a list of extra ligatures to extend the list of ligatures derived from the afm file.
encoding can be NULL or the empty string if the default encoding (TeXBase1) schall be used.
If the encoding is set to `builtin' then there will be no reencoding and the font specific encoding will be used. This is very useful with symbol fonts.