overlay *		OVERLAY

Time			T_UV
Atom			T_UV
Window			T_UV
Pixmap			T_UV
rxvt_img::nv		T_NV

urxvt::pixbuf           T_PTROBJ

octet_string            OCTET_STRING
utf8_string             UTF8_STRING

rxvt_term *		TERM
rxvt_img *		IMG

GError **		T_UV

render_repeat_mode	RENDER_REPEAT_MODE

INPUT

TERM
	$var = SvTERM ($arg);
OVERLAY
	$var = SvOVERLAY ($arg);

OCTET_STRING
        $var = SvPVbyte_nolen ($arg)

UTF8_STRING
        $var = SvPVutf8_nolen ($arg) /* imperfect, destroys references */

IMG
        if (SvROK ($arg) && sv_derived_from ($arg, \"urxvt::img\"))
          $var = INT2PTR ($type, SvIV ((SV *) SvRV ($arg)));
        else
          croak (\"%s is not of type urxvt::img\", \"$var\")

RENDER_REPEAT_MODE
	if (SvOK ($arg))
          {
	    $var = SvIV ($arg);
            if ($var != RepeatNone && $var != RepeatNormal && $var != RepeatPad && $var != RepeatReflect)
              croak (\"invalid repeat mode specified (%d)\\n\", $var);
          }
        else
          $var = RepeatNormal;

OUTPUT

TERM
	$arg = newSVterm ($var);

IMG
        sv_setref_pv ($arg, "urxvt::img", (void *)$var);