struct ImageLoaderBackend;
-gboolean image_loader_jpeg_load(gpointer loader, const guchar *buf, gsize count, GError **error);
+gboolean image_loader_jpeg_write(gpointer loader, const guchar *buf, gsize &chunk_size, gsize count, GError **error);
void image_loader_backend_set_jpeg(ImageLoaderBackend *funcs);
#endif