+#ifdef HAVE_WINDOW_SYSTEM
+
+/* On frame F, convert character coordinates X and Y to pixel
+ coordinates *PIX_X and *PIX_Y. */
+
+static void
+frame_char_to_pixel_position (struct frame *f, int x, int y,
+ int *pix_x, int *pix_y)
+{
+ *pix_x = FRAME_COL_TO_PIXEL_X (f, x) + FRAME_COLUMN_WIDTH (f) / 2;
+ *pix_y = FRAME_LINE_TO_PIXEL_Y (f, y) + FRAME_LINE_HEIGHT (f) / 2;
+
+ if (*pix_x < 0)
+ *pix_x = 0;
+ if (*pix_x > FRAME_PIXEL_WIDTH (f))
+ *pix_x = FRAME_PIXEL_WIDTH (f);
+
+ if (*pix_y < 0)
+ *pix_y = 0;
+ if (*pix_y > FRAME_PIXEL_HEIGHT (f))
+ *pix_y = FRAME_PIXEL_HEIGHT (f);
+}
+
+/* On frame F, reposition mouse pointer to character coordinates X and Y. */
+
+static void
+frame_set_mouse_position (struct frame *f, int x, int y)
+{
+ int pix_x, pix_y;
+
+ frame_char_to_pixel_position (f, x, y, &pix_x, &pix_y);
+ frame_set_mouse_pixel_position (f, pix_x, pix_y);
+}
+
+#endif /* HAVE_WINDOW_SYSTEM */
+