// Try to treat as filename first.
        if (rb_respond_to(val, rb_intern("to_str")))
        {
            const char* filename = STR2CSTR(rb_funcall(val, rb_intern("to_str"), 0));
            return quickLoadBitmap(Gosu::utf8ToWstring(filename));
        }

        // Otherwise, try to call .to_blob on it.
        // (Works with RMagick).
        VALUE conversion = rb_str_new2("to_blob { self.format = 'RGBA'; self.depth = 8 }");
        VALUE blob = rb_obj_instance_eval(1, &conversion, val);
        Check_SafeStr(blob);
        unsigned width = NUM2UINT(rb_funcall(val, rb_intern("columns"), 0));
        unsigned height = NUM2UINT(rb_funcall(val, rb_intern("rows"), 0));