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diff --git a/src/dispextern.h b/src/dispextern.h
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+/* Interface definitions for display code.
+   Copyright (C) 1985 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Nonzero means don't assume anything about current
+   contents of actual terminal screen */
+extern int screen_garbaged;
+
+/* Nonzero means last display completed and cursor is really at
+   cursX, cursY.  Zero means it was preempted. */
+extern int display_completed;
+
+#ifdef HAVE_X_WINDOWS
+struct run
+{
+  int begin_run;
+  int len;
+  int face_code;                /* Also handles underlining. */
+};
+#endif
+
+/* This structure is used for the actual display of text on a screen.
+
+   There are two instantiations of it:  the glyphs currently displayed,
+   and the glyphs we desire to display.  The latter object is generated
+   from buffers being displayed. */
+
+struct screen_glyphs
+  {
+#ifdef MULTI_SCREEN
+    struct  screen *screen;     /* Screen these glyphs belong to. */
+#endif /* MULTI_SCREEN */
+    int height;
+    int width;
+
+    int *used;                  /* Vector of widths (in chars) of lines. */
+    /* Vector of line contents.
+       m->glyphs[V][H] is the glyph at position V, H.
+       Note that ->glyphs[...][screen_width] is always 0
+       and so is ->glyphs[...][-1].  */
+    GLYPH **glyphs;
+    /* long vector from which the strings in `glyphs' are taken.  */
+    GLYPH *total_contents;
+
+    /* highlight[n] != 0 iff line n is highlighted.  */
+    char *highlight;
+
+    /* When representing a desired screen, enable[n] == 0 implies line
+       n is same as current screen.  When representing current screen
+       contents, enable[n] == 0 implies line n is blank.  */
+    char *enable;
+
+    /* Buffer offset of this line's first char. */
+    int   *bufp;
+
+#ifdef HAVE_X_WINDOWS
+    int *nruns;                 /* N runs of differently displayed text. */
+    struct run **face_list;
+    short *top_left_x;          /* Pixel position of top left corner */
+    short *top_left_y;
+    short *pix_width;           /* Pixel width of line. */
+    short *pix_height;          /* Pixel height of line. */
+#endif  /* HAVE_X_WINDOWS */
+  };
+
+#if 0
+#define LINE_HEIGHT(s,n) (current_glyphs->pix_height[n])
+#define LINE_WIDTH(s,n) (current_glyphs->pix_width[n])
+#endif
+
+#define LINE_HEIGHT(s,n) (FONT_HEIGHT((s)->display.x->font))
+#define LINE_WIDTH(s,n) (FONT_HEIGHT((s)->display.x->font) \
+                         * SCREEN_CURRENT_GLYPHS(s)->enable[(n)])
+
+extern void get_display_line ();
+
+/* Buffer used by `message' for formatting a message.  */
+extern char *message_buf;
+extern int message_buf_size;