? gnome-session-speedup.patch
? stamp-h1
Index: gnome-session/logout.c
===================================================================
RCS file: /cvs/gnome/gnome-session/gnome-session/logout.c,v
retrieving revision 1.60
diff -u -p -r1.60 logout.c
--- gnome-session/logout.c	26 Apr 2005 10:56:50 -0000	1.60
+++ gnome-session/logout.c	17 Aug 2005 16:37:52 -0000
@@ -61,10 +61,12 @@ typedef struct {
   int           rowstride;
   GdkWindow    *root_window;
   GdkWindow    *draw_window;
-  GdkPixbuf    *start_pb, *end_pb, *frame;
-  guchar       *start_p, *end_p, *frame_p;
+  GdkPixmap    *draw_pixmap;
+  GdkPixbuf    *start_pb, *frame;
+  guchar       *start_p, *frame_p;
   GTimeVal      start_time;
   GdkGC        *gc;
+  int           callback_id;
 } FadeoutData;
 
 static GList *fadeout_windows = NULL;
@@ -76,8 +78,10 @@ static void
 get_current_frame (FadeoutData *fadeout,
 		   double    sat)
 {
-  guchar *sp, *ep, *fp;
+  guchar *sp, *fp;
   int i, j, width, offset;
+  const int FIXED = 8;
+  int fixed_mult = (0.5 + (sat / 2)) * (1 << 8);
 
   width = fadeout->area.width * 3;
   offset = 0;
@@ -85,44 +89,17 @@ get_current_frame (FadeoutData *fadeout,
   for (i = 0; i < fadeout->area.height; i++)
     {
       sp = fadeout->start_p + offset;
-      ep = fadeout->end_p   + offset;
       fp = fadeout->frame_p + offset;
 
-      for (j = 0; j < width; j += 3)
+      for (j = 0; j < width; j ++)
 	{
-	  guchar r = abs (*(sp++) - ep[0]);
-	  guchar g = abs (*(sp++) - ep[1]);
-	  guchar b = abs (*(sp++) - ep[2]);
-
-	  *(fp++) = *(ep++) + r * sat;
-	  *(fp++) = *(ep++) + g * sat;
-	  *(fp++) = *(ep++) + b * sat;
+	  *(fp++) = (*(sp++) * fixed_mult) >> FIXED;
 	}
 
       offset += fadeout->rowstride;
     }
 }
 
-static void
-darken_pixbuf (GdkPixbuf *pb)
-{
-  int width, height, rowstride;
-  int i, j;
-  guchar *p, *pixels;
-  
-  width     = gdk_pixbuf_get_width (pb) * 3;
-  height    = gdk_pixbuf_get_height (pb);
-  rowstride = gdk_pixbuf_get_rowstride (pb);
-  pixels    = gdk_pixbuf_get_pixels (pb);
-  
-  for (i = 0; i < height; i++)
-    {
-      p = pixels + (i * rowstride);
-      for (j = 0; j < width; j++)
-	p [j] >>= 1;
-    }
-}
-
 static gboolean
 fadeout_callback (FadeoutData *fadeout)
 {
@@ -141,30 +118,26 @@ fadeout_callback (FadeoutData *fadeout)
 
   if (elapsed > FADE_DURATION)
     {
-      gdk_draw_pixbuf (fadeout->draw_window,
+      get_current_frame (fadeout, 0.0);
+      gdk_draw_pixbuf (fadeout->draw_pixmap,
 		       fadeout->gc,
-		       fadeout->end_pb,
+		       fadeout->frame,
 		       0, 0,
 		       0, 0,
 		       fadeout->area.width,
 		       fadeout->area.height,
 		       GDK_RGB_DITHER_NONE,
 		       0, 0);
+      gdk_window_clear (fadeout->draw_window);
 
-      g_object_unref (fadeout->gc);
-      g_object_unref (fadeout->start_pb);
-      g_object_unref (fadeout->end_pb);
-      g_object_unref (fadeout->frame);
-
-      g_free (fadeout);
-    
+      fadeout->callback_id = 0;
       return FALSE;
     }
 
   percent = elapsed / FADE_DURATION;
 
   get_current_frame (fadeout, 1.0 - percent);
-  gdk_draw_pixbuf (fadeout->draw_window,
+  gdk_draw_pixbuf (fadeout->draw_pixmap,
 		   fadeout->gc,
 		   fadeout->frame,
 		   0, 0,
@@ -173,6 +146,7 @@ fadeout_callback (FadeoutData *fadeout)
 		   fadeout->area.height,
 		   GDK_RGB_DITHER_NONE,
 		   0, 0);
+  gdk_window_clear (fadeout->draw_window);
 
   gdk_flush ();
   
@@ -211,7 +185,8 @@ fadeout_screen (GdkScreen *screen,
   attr_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP | GDK_WA_NOREDIR;
 
   fadeout->draw_window = gdk_window_new (fadeout->root_window, &attr, attr_mask);
-  fadeout_windows = g_list_prepend (fadeout_windows, fadeout->draw_window);
+  fadeout->draw_pixmap = gdk_pixmap_new (fadeout->draw_window, fadeout->area.width, fadeout->area.height, gdk_drawable_get_depth (fadeout->draw_window));
+  fadeout_windows = g_list_prepend (fadeout_windows, fadeout);
   
   fadeout->start_pb = gdk_pixbuf_get_from_drawable (NULL,
 						    fadeout->root_window,
@@ -222,14 +197,10 @@ fadeout_screen (GdkScreen *screen,
 						    fadeout->area.width,
 						    fadeout->area.height);
   
-  fadeout->end_pb = gdk_pixbuf_copy (fadeout->start_pb);
-  darken_pixbuf (fadeout->end_pb);
-  
   fadeout->frame = gdk_pixbuf_copy (fadeout->start_pb);
   fadeout->rowstride = gdk_pixbuf_get_rowstride (fadeout->start_pb);
 
   fadeout->start_p = gdk_pixbuf_get_pixels (fadeout->start_pb);
-  fadeout->end_p   = gdk_pixbuf_get_pixels (fadeout->end_pb);
   fadeout->frame_p = gdk_pixbuf_get_pixels (fadeout->frame);
   
   values.subwindow_mode = GDK_INCLUDE_INFERIORS;
@@ -238,7 +209,7 @@ fadeout_screen (GdkScreen *screen,
 
   gdk_window_set_back_pixmap (fadeout->draw_window, NULL, FALSE);
   gdk_window_show (fadeout->draw_window);
-  gdk_draw_pixbuf (fadeout->draw_window,
+  gdk_draw_pixbuf (fadeout->draw_pixmap,
 		   fadeout->gc,
 		   fadeout->frame,
 		   0, 0,
@@ -247,9 +218,11 @@ fadeout_screen (GdkScreen *screen,
 		   fadeout->area.height,
 		   GDK_RGB_DITHER_NONE,
 		   0, 0);
+  gdk_window_set_back_pixmap (fadeout->draw_window, fadeout->draw_pixmap, FALSE);
+  gdk_window_clear (fadeout->draw_window);
   
   g_get_current_time (&fadeout->start_time);
-  g_idle_add ((GSourceFunc) fadeout_callback, fadeout);
+  fadeout->callback_id = g_idle_add ((GSourceFunc) fadeout_callback, fadeout);
 }
 
 static void
@@ -259,8 +232,20 @@ hide_fadeout_windows (void)
 
   for (l = fadeout_windows; l; l = l->next)
     {
-      gdk_window_hide (GDK_WINDOW (l->data));
-      g_object_unref (l->data);
+      FadeoutData *fadeout = l->data;
+      gdk_window_hide (fadeout->draw_window);
+
+      if (fadeout->callback_id)
+	g_source_remove (fadeout->callback_id);
+
+      g_object_unref (fadeout->gc);
+      g_object_unref (fadeout->start_pb);
+      g_object_unref (fadeout->frame);
+
+      g_object_unref (fadeout->draw_window);
+      g_object_unref (fadeout->draw_pixmap);
+
+      g_free (fadeout);
     }
 
   g_list_free (fadeout_windows);