+DECLARE_IMAGE_INSTANTIATOR_FORMAT (nothing);
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (string);
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (formatted_string);
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (inherit);
+#ifdef HAVE_JPEG
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (jpeg);
+#endif
+#ifdef HAVE_TIFF
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (tiff);
+#endif
+#ifdef HAVE_PNG
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (png);
+#endif
+#ifdef HAVE_GIF
+DECLARE_IMAGE_INSTANTIATOR_FORMAT (gif);
+#endif