#i_img *			T_PTR_NULL
Imager::Color           T_PTROBJ
Imager::Color::Float    T_PTROBJ
Imager::ImgRaw          T_IMAGER_IMAGE
Imager::Font::TT	T_PTROBJ
Imager::IO              T_PTROBJ
Imager::FillHandle      T_PTROBJ
const char *		T_PV
float			T_FLOAT
float*			T_ARRAY
undef_int		T_IV_U
undef_neg_int           T_IV_NEGU
HASH			T_HVREF
utf8_str		T_UTF8_STR
i_img_dim		T_IV

# these types are for use by Inline, which can't handle types containing ::
Imager__Color           T_PTROBJ_INV
Imager__Color__Float    T_PTROBJ_INV
Imager__ImgRaw          T_IMAGER_IMAGE
Imager__FillHandle      T_PTROBJ_INV
Imager__IO              T_PTROBJ_INV

# mostly intended for non-Imager-core use
Imager                  T_IMAGER_FULL_IMAGE

#############################################################################
INPUT
T_PTR_NULL
	if (SvOK($arg)) $var = INT2PTR($type,SvIV($arg));
	else $var = NULL

# handles Imager objects rather than just raw objects
T_IMAGER_IMAGE
        if (sv_derived_from($arg, \"Imager::ImgRaw\")) {
            IV tmp = SvIV((SV*)SvRV($arg));
            $var = INT2PTR($type,tmp);
        }
        else if (sv_derived_from($arg, \"Imager\") && 
                 SvTYPE(SvRV($arg)) == SVt_PVHV) {
            HV *hv = (HV *)SvRV($arg);
            SV **sv = hv_fetch(hv, \"IMG\", 3, 0);
            if (sv && *sv && sv_derived_from(*sv, \"Imager::ImgRaw\")) {
                IV tmp = SvIV((SV*)SvRV(*sv));
                $var = INT2PTR($type,tmp);
            }
            else
                Perl_croak(aTHX_ \"$var is not of type Imager::ImgRaw\");
        }
        else
            Perl_croak(aTHX_ \"$var is not of type Imager::ImgRaw\");

T_IMAGER_FULL_IMAGE
        if (sv_derived_from($arg, \"Imager\") && 
                 SvTYPE(SvRV($arg)) == SVt_PVHV) {
            HV *hv = (HV *)SvRV($arg);
            SV **sv = hv_fetch(hv, \"IMG\", 3, 0);
            if (sv && *sv && sv_derived_from(*sv, \"Imager::ImgRaw\")) {
                IV tmp = SvIV((SV*)SvRV(*sv));
                $var = INT2PTR($type,tmp);
            }
            else
                Perl_croak(aTHX_ \"$var is not of type Imager::ImgRaw\");
        }
        else
            Perl_croak(aTHX_ \"$var is not of type Imager\");

# same as T_PTROBJ, but replace __ with ::, the opposite of the way
# xsubpp's processing works
# this is to compensate for Inline's problem with type names containing ::
T_PTROBJ_INV
        if (sv_derived_from($arg, \"${(my $ntt=$ntype)=~s/__/::/g;\$ntt}\")) {
            IV tmp = SvIV((SV*)SvRV($arg));
            $var = INT2PTR($type,tmp);
        }
        else
            croak(\"$var is not of type ${(my $ntt=$ntype)=~s/__/::/g;\$ntt}\");


#############################################################################
OUTPUT
T_IV_U
	if ($var == 0) $arg=&PL_sv_undef;
	else sv_setiv($arg, (IV)$var);
T_IV_NEGU
	if ($var < 0) $arg=&PL_sv_undef;
	else sv_setiv($arg, (IV)$var);
T_PTR_NULL
	sv_setiv($arg, (IV)$var);

# same as T_PTROBJ
T_IMAGER_IMAGE
        sv_setref_pv($arg, \"Imager::ImgRaw\", (void*)$var);

T_PTROBJ_INV
        sv_setref_pv($arg, \"${(my $ntt=$ntype)=~s/__/::/g;\$ntt}\", (void*)$var);

# ugh, the things we do for ease of use
# this isn't suitable in some cases
T_IMAGER_FULL_IMAGE
        if ($var) {
          SV *imobj = NEWSV(0, 0);
          HV *hv = newHV();
          sv_setref_pv(imobj, \"Imager::ImgRaw\", $var);
          hv_store(hv, "IMG", 3, imobj, 0);
          $arg = sv_2mortal(sv_bless(newRV_noinc((SV*)hv), gv_stashpv("Imager", 1)));
        }
        else {
          $arg = &PL_sv_undef;
        }