* glib/poppler-document.cc (poppler_document_new_from_file): Add
        output device (cairo or splash) to PopplerDocument and initialize
        it in the constructor.

        * glib/poppler-page.cc (splash_render_to_pixbuf,
        cairo_render_to_pixbuf): Use output device from associated poppler
        document instead of creating a new one.

        * poppler-glib.pc.in (Requires): Add Requires: field.

        * poppler/Page.cc (loadThumb): Remove unecessary and buggy call to
        Stream::addFilters(), reported by Ryan Lortie (#3046).