2 files changed, 15 insertions, 25 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 6b56abbafd1..2c9b6c8375b 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2015-02-05  Martin Rudalics  <rudalics@gmx.at>
+
+        * xdisp.c (Fwindow_text_pixel_size): Remove optional BUFFER
+        argument added on 2015-02-01.
+
 2015-02-04  Paul Eggert  <eggert@cs.ucla.edu>
 
         Remove no-longer-used two_byte_p calculations
diff --git a/src/xdisp.c b/src/xdisp.c
index 3c928f7897a..5c3e641fdfe 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -9650,7 +9650,7 @@ in_display_vector_p (struct it *it)
           && it->dpvec + it->current.dpvec_index != it->dpend);
 }
 
-DEFUN ("window-text-pixel-size", Fwindow_text_pixel_size, Swindow_text_pixel_size, 0, 7, 0,
+DEFUN ("window-text-pixel-size", Fwindow_text_pixel_size, Swindow_text_pixel_size, 0, 6, 0,
        doc: /* Return the size of the text of WINDOW's buffer in pixels.
 WINDOW must be a live window and defaults to the selected one.  The
 return value is a cons of the maximum pixel-width of any text line and
@@ -9683,17 +9683,12 @@ Optional argument MODE-AND-HEADER-LINE nil or omitted means do not
 include the height of the mode- or header-line of WINDOW in the return
 value.  If it is either the symbol `mode-line' or `header-line', include
 only the height of that line, if present, in the return value.  If t,
-include the height of both, if present, in the return value.
-
-Optional argument BUFFER nil means to return the size of the text of
-WINDOW's buffer.  BUFFER t means to return the size of the text of the
-current buffer as if it were displayed in WINDOW.  Else BUFFER has to
-specify a live buffer and this function returns the size of the text of
-BUFFER as if it were displayed in WINDOW.  */)
+include the height of both, if present, in the return value.  */)
   (Lisp_Object window, Lisp_Object from, Lisp_Object to, Lisp_Object x_limit,
-   Lisp_Object y_limit, Lisp_Object mode_and_header_line, Lisp_Object buffer)
+   Lisp_Object y_limit, Lisp_Object mode_and_header_line)
 {
   struct window *w = decode_live_window (window);
+  Lisp_Object buffer = w->contents;
   struct buffer *b;
   struct it it;
   struct buffer *old_b = NULL;
@@ -9702,23 +9697,13 @@ BUFFER as if it were displayed in WINDOW.  */)
   void *itdata = NULL;
   int c, max_y = -1, x = 0, y = 0;
 
-  if (EQ (buffer, Qt))
-    b = current_buffer;
-  else
-    {
-      if (NILP (buffer))
-        buffer = w->contents;
-
-      CHECK_BUFFER (buffer);
-      if (!BUFFER_LIVE_P (XBUFFER (buffer)))
-        error ("Not a live buffer");
+  CHECK_BUFFER (buffer);
+  b = XBUFFER (buffer);
 
-      b = XBUFFER (buffer);
-      if (b != current_buffer)
-        {
-          old_b = current_buffer;
-          set_buffer_internal (b);
-        }
+  if (b != current_buffer)
+    {
+      old_b = current_buffer;
+      set_buffer_internal (b);
     }
 
   if (NILP (from))