TYPEMAP
imgProcess *             O_OBJECT
imgArray *               O_OBJECT
imgGlyph *               O_OBJECT
BitFont *                O_OBJECT
Glyph *                  O_OBJECT
Glyph **                 O_OBJECT
float			 T_FLOAT

OUTPUT
# The Perl object is blessed into 'CLASS', which should be a
# char* having the name of the package for the blessing.
O_OBJECT
     sv_setref_pv( $arg, CLASS, (void*)$var );

INPUT
O_OBJECT
        if( sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG) )
                $var = ($type)SvIV((SV*)SvRV( $arg ));
        else{
                warn( \"${Package}::$func_name() -- $var is not a blessed SV reference\" );
                XSRETURN_UNDEF;
        }
