(save_frame_matrix, restore_frame_matrix): Removed.

(save_or_restore_current_matrix): New function for the same
purpose, but more efficient.
(adjust_frame_glyphs_for_frame_redisplay): Use it.

2 files changed, 28 insertions, 42 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index c25d648fcad..655b1312d65 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,10 @@
+2000-12-23  Gerd Moellmann  <gerd@gnu.org>
+
+        * dispnew.c (save_frame_matrix, restore_frame_matrix): Removed.
+        (save_or_restore_current_matrix): New function for the same
+        purpose, but more efficient.
+        (adjust_frame_glyphs_for_frame_redisplay): Use it.
+
 2000-12-23  Eli Zaretskii  <eliz@is.elta.co.il>
 
         * xdisp.c (syms_of_xdisp): Fix last change.
diff --git a/src/dispnew.c b/src/dispnew.c
index 9c96da4b804..36ccd0d7bf6 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -120,8 +120,7 @@ struct dim
 
 /* Function prototypes.  */
 
-static struct glyph_matrix *save_frame_matrix P_ ((struct glyph_matrix *));
-static void restore_frame_matrix P_ ((struct glyph_matrix *, struct glyph_matrix *));
+static void save_or_restore_current_matrix P_ ((struct frame *, int));
 static void fake_current_matrices P_ ((Lisp_Object));
 static void redraw_overlapping_rows P_ ((struct window *, int));
 static void redraw_overlapped_rows P_ ((struct window *, int));
@@ -2056,55 +2055,35 @@ fake_current_matrices (window)
 }
 
 
-/* Return a glyph matrix that holds of copy of the glyph contents
-   of frame matrix M.  */
+/* Save or restore the contents of frame F's current frame matrix.
+   SAVE_P non-zero means save it.  */
 
-static struct glyph_matrix *
-save_frame_matrix (m)
-     struct glyph_matrix *m;
+static void
+save_or_restore_current_matrix (f, save_p)
+     struct frame *f;
+     int save_p;
 {
-  struct glyph_matrix *copy;
-  int i;
+  struct glyph_row *from, *to, *end;
 
-  copy = (struct glyph_matrix *) xmalloc (sizeof *copy);
-  *copy = *m;
-  copy->rows = (struct glyph_row *) xmalloc (m->nrows * sizeof (*copy->rows));
-
-  for (i = 0; i < copy->nrows; ++i)
+  if (save_p)
     {
-      struct glyph_row *from = m->rows + i;
-      struct glyph_row *to = copy->rows + i;
-      size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph);
-      to->glyphs[TEXT_AREA] = (struct glyph *) xmalloc (nbytes);
-      bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes);
-      to->used[TEXT_AREA] = from->used[TEXT_AREA];
+      from = f->current_matrix->rows;
+      end = from + f->current_matrix->nrows;
+      to = f->desired_matrix->rows;
+    }
+  else
+    {
+      from = f->desired_matrix->rows;
+      end = from + f->desired_matrix->nrows;
+      to = f->current_matrix->rows;
     }
   
-  return copy;
-}
-
-
-/* Restore the glyph contents of frame matrix M from the copy COPY,
-   made by save_frame_matrix.  Free memory allocated for COPY.  */
-
-static void
-restore_frame_matrix (m, copy)
-     struct glyph_matrix *m, *copy;
-{
-  int i;
-  
-  for (i = 0; i < copy->nrows; ++i)
+  for (; from < end; ++from, ++to)
     {
-      struct glyph_row *from = copy->rows + i;
-      struct glyph_row *to = m->rows + i;
       size_t nbytes = from->used[TEXT_AREA] * sizeof (struct glyph);
       bcopy (from->glyphs[TEXT_AREA], to->glyphs[TEXT_AREA], nbytes);
       to->used[TEXT_AREA] = from->used[TEXT_AREA];
-      xfree (from->glyphs[TEXT_AREA]);
     }
-
-  xfree (copy->rows);
-  xfree (copy);
 }
 
 
@@ -2196,9 +2175,9 @@ adjust_frame_glyphs_for_frame_redisplay (f)
           && matrix_dim.width == f->current_matrix->matrix_w
           && matrix_dim.height == f->current_matrix->matrix_h)
         {
-          struct glyph_matrix *saved = save_frame_matrix (f->current_matrix);
+          save_or_restore_current_matrix (f, 1);
           adjust_glyph_matrix (NULL, f->current_matrix, 0, 0, matrix_dim);
-          restore_frame_matrix (f->current_matrix, saved);
+          save_or_restore_current_matrix (f, 0);
           fake_current_matrices (FRAME_ROOT_WINDOW (f));
         }
       else