-using ImageLoaderBackendCbAreaPrepared = void (*)(gpointer, gpointer);
-using ImageLoaderBackendCbSize = void (*)(gpointer, gint, gint, gpointer);
-using ImageLoaderBackendCbAreaUpdated = void (*)(gpointer, guint, guint, guint, guint, gpointer);
-
-using ImageLoaderBackendFuncLoaderNew = gpointer (*)(ImageLoaderBackendCbAreaUpdated, ImageLoaderBackendCbSize, ImageLoaderBackendCbAreaPrepared, gpointer);
-using ImageLoaderBackendFuncSetSize = void (*)(gpointer, int, int);
-using ImageLoaderBackendFuncWrite = gboolean (*)(gpointer, const guchar *, gsize &, gsize, GError **);
-using ImageLoaderBackendFuncGetPixbuf = GdkPixbuf *(*)(gpointer);
-using ImageLoaderBackendFuncClose = gboolean (*)(gpointer, GError **);
-using ImageLoaderBackendFuncAbort = void (*)(gpointer);
-using ImageLoaderBackendFuncFree = void (*)(gpointer);
-using ImageLoaderBackendFuncGetFormatName = gchar *(*)(gpointer);
-using ImageLoaderBackendFuncGetFormatMimeTypes = gchar **(*)(gpointer);
-using ImageLoaderBackendFuncSetPageNum = void (*)(gpointer, gint);
-using ImageLoaderBackendFuncGetPageTotal = gint (*)(gpointer);
-