+/* xform.c */
+void indent_mtx2(GRFMTX_2D m);
+void xlat_mtx2(GRFMTX_2D m, const double x, const double y);
+void scale_mtx2(GRFMTX_2D m, const double sx, const double sy);
+void rot_mtx2(GRFMTX_2D m, const double theta);
+void mult_mtx2(GRFMTX_2D m1, GRFMTX_2D m2, GRFMTX_2D result);
+void xform_mtx2(GRFMTX_2D m, double *x, double *y);
+void rotate2d(double x[], double y[], int pts, double angle);
+void xlat2d(double x[], double y[], int pts, double xoffset, double yoffset);
+void scale2d(double x[], double y[], int pts, double xfact, double yfact);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+