Fix inaccuracy in a comment.

[bpt/emacs.git] / src / dispextern.h

diff --git a/src/dispextern.h b/src/dispextern.h
index aa40f01..1f26990 100644 (file)
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -1,6 +1,6 @@
 /* Interface definitions for display code.
 
-Copyright (C) 1985, 1993-1994, 1997-2012  Free Software Foundation, Inc.
+Copyright (C) 1985, 1993-1994, 1997-2013 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -317,13 +317,18 @@ struct glyph
      Lisp string, this is a position in that string.  If it is a
      buffer, this is a position in that buffer.  A value of -1
      together with a null object means glyph is a truncation glyph at
-     the start of a row.  */
+     the start of a row.  Right truncation and continuation glyphs at
+     the right edge of a row have their position set to the next
+     buffer position that is not shown on this row.  Glyphs inserted
+     by redisplay, such as the empty space after the end of a line on
+     TTYs, or the overlay-arrow on a TTY, have this set to -1.  */
   ptrdiff_t charpos;
 
-  /* Lisp object source of this glyph.  Currently either a buffer or
-     a string, if the glyph was produced from characters which came from
+  /* Lisp object source of this glyph.  Currently either a buffer or a
+     string, if the glyph was produced from characters which came from
      a buffer or a string; or 0 if the glyph was inserted by redisplay
-     for its own purposes such as padding.  */
+     for its own purposes, such as padding or truncation/continuation
+     glyphs, or the overlay-arrow glyphs on TTYs.  */
   Lisp_Object object;
 
   /* Width in pixels.  */
@@ -597,8 +602,8 @@ struct glyph_pool
 
    2. Window glyph matrices on frames having frame glyph matrices.
    Such matrices are sub-matrices of their corresponding frame matrix,
-   i.e. frame glyph matrices and window glyph matrices share the same
-   glyph memory which is allocated in form of a glyph_pool structure.
+   i.e., frame glyph matrices and window glyph matrices share the same
+   glyph memory, which is allocated in the form of a glyph_pool structure.
    Glyph rows in such a window matrix are slices of frame matrix rows.
 
    2. Free-standing window glyph matrices managing their own glyph
@@ -3181,7 +3186,15 @@ bool valid_image_p (Lisp_Object);
 void prepare_image_for_display (struct frame *, struct image *);
 ptrdiff_t lookup_image (struct frame *, Lisp_Object);
 
-unsigned long image_background (struct image *, struct frame *,
+#if defined (HAVE_X_WINDOWS) ||  defined (HAVE_NS)
+#define RGB_PIXEL_COLOR unsigned long
+#endif
+
+#ifdef HAVE_NTGUI
+#define RGB_PIXEL_COLOR COLORREF
+#endif
+
+RGB_PIXEL_COLOR image_background (struct image *, struct frame *,
                                 XImagePtr_or_DC ximg);
 int image_background_transparent (struct image *, struct frame *,
                                   XImagePtr_or_DC mask);