-unsigned char **lbx_img_getframe(LBXimg *img, int frame);
-unsigned char **lbx_img_getmask(LBXimg *img);
+int lbx_img_seek(struct lbx_image *img, unsigned frame);
+long lbx_img_read_row_header(struct lbx_image *img, unsigned *x, unsigned *y);
+long lbx_img_read_row_data(struct lbx_image *img, void *buf);