Re: New from Iain's hack factory

[Todd Kulesza <todd dropline net>]

Iain, you are rocking out.  Thanks :]

Todd

iain wrote:
> Its amazing what you can do with 10 minutes and a desire not to write YA
> iTunes Clone...
>
> Apply to gnome-session, don't think it matters if the previous
> gnome-session patch has been applied.
> Log out,
> log back in
> and log out again...
>
> Log out times are slightly slower, but still faster than winXP on my
> laptop.
>
> Although an arthritic snail would be faster than winXP on my laptop.
>
> Oh yeah, should tell the viewers 
> listening in on radio what it does
> Instead of the black lines filling the screen
> It gradually fades your desktop to greyscale
>
> iain
>
>
> ------------------------------------------------------------------------
>
> Index: logout.c
> ===================================================================
> RCS file: /cvs/gnome/gnome-session/gnome-session/logout.c,v
> retrieving revision 1.44
> diff -u -p -r1.44 logout.c
> --- logout.c	15 Oct 2002 06:05:01 -0000	1.44
> +++ logout.c	17 Feb 2003 19:03:53 -0000
> @@ -54,63 +54,53 @@ static enum
>  action = LOGOUT;
>  
>  typedef struct {
> -	GdkScreen    *screen;
> -	int           monitor;
> -	GdkRectangle  iris_rect;
> -	GdkWindow    *root_window;
> -	int           iris_block;
> -	GdkGC        *iris_gc;
> +  GdkScreen    *screen;
> +  int           monitor;
> +  GdkRectangle  iris_rect;
> +  GdkWindow    *root_window;
> +  GdkPixbuf    *back_pb, *dest;
> +  int           iris_block;
> +  int           percent;
> +  GdkGC        *iris_gc;
>  } IrisData;
>  
>  static int num_iris_timeouts = 0;
>  
> -static gint
> -iris_callback (IrisData *data)
> +static gboolean
> +iris_callback (gpointer data)
>  {
> -  gint i;
> -  gint width_step;
> -  gint height_step;
> -  gint width;
> -  gint height;
> -
> -  width_step = MIN (data->iris_rect.width / 2, data->iris_block);
> -  height_step = MIN (data->iris_rect.width / 2, data->iris_block);
> -
> -  for (i = 0; i < MIN (width_step, height_step); i++)
> -    {
> -      width  = (gint)data->iris_rect.width  - 2 * i;
> -      height = (gint)data->iris_rect.height - 2 * i;
> +  IrisData *iris = data;
>  
> -      if (width < 0 || height < 0)
> -        break;
> -
> -      gdk_draw_rectangle (data->root_window, data->iris_gc, FALSE,
> -                          data->iris_rect.x + i,
> -			  data->iris_rect.y + i,
> -                          width, height);
> +  if (iris->percent < 0) {
> +    
> +    g_object_unref (iris->iris_gc);
> +    g_object_unref (iris->back_pb);
> +    g_object_unref (iris->dest);
> +    
> +    g_free (iris);
> +    
> +    if (!--num_iris_timeouts) {
> +      gtk_main_quit ();
>      }
> +    
> +    return FALSE;
> +  }
> +  
> +  gdk_pixbuf_saturate_and_pixelate (iris->back_pb, iris->dest,
> +				    ((float) iris->percent) / 100.0, FALSE);
> +
> +  gdk_draw_pixbuf (iris->root_window, iris->iris_gc, iris->dest,
> +		   0, 0, iris->iris_rect.x, iris->iris_rect.y,
> +		   iris->iris_rect.width, iris->iris_rect.height,
> +		   GDK_RGB_DITHER_NONE, 0, 0);
>  
>    gdk_flush ();
> -
> -  data->iris_rect.x += width_step;
> -  data->iris_rect.y += height_step;
> -  data->iris_rect.width -= MIN (data->iris_rect.width, data->iris_block * 2);
> -  data->iris_rect.height -= MIN (data->iris_rect.height, data->iris_block * 2);
> -
> -  if (data->iris_rect.width == 0 || data->iris_rect.height == 0)
> -    {
> -      g_object_unref (data->iris_gc);
> -      g_free (data);
> -
> -      if (!--num_iris_timeouts)
> -        gtk_main_quit ();
> -
> -      return FALSE;
> -    }
> -  else
> -    return TRUE;
> +  
> +  iris->percent -= 30;
> +    
> +  return TRUE;
>  }
> -
> +  
>  static void
>  iris_on_screen (GdkScreen *screen,
>  		int        monitor)
> @@ -128,21 +118,23 @@ iris_on_screen (GdkScreen *screen,
>    data->iris_rect.y = gsm_screen_get_y (screen, monitor);
>    data->iris_rect.width = gsm_screen_get_width (screen, monitor);
>    data->iris_rect.height = gsm_screen_get_height (screen, monitor);
> -
> +  data->percent = 90;
> +  
>    data->root_window = gdk_screen_get_root_window (screen);
> -
> -  values.line_style = GDK_LINE_ON_OFF_DASH;
> +  data->back_pb = gdk_pixbuf_get_from_drawable (NULL, data->root_window,
> +						NULL, data->iris_rect.x,
> +						data->iris_rect.y,
> +						0, 0, data->iris_rect.width,
> +						data->iris_rect.height);
> +  data->dest = gdk_pixbuf_copy (data->back_pb);
> +  
> +/*   values.line_style = GDK_LINE_ON_OFF_DASH; */
>    values.subwindow_mode = GDK_INCLUDE_INFERIORS;
>  
>    data->iris_gc = gdk_gc_new_with_values (data->root_window,
>  					  &values,
> -					  GDK_GC_LINE_STYLE | GDK_GC_SUBWINDOW);
> -  gdk_gc_set_dashes (data->iris_gc, 0, dash_list, 2);
> -
> -  /* Plan for a time of 0.5 seconds for effect */
> -  data->iris_block = data->iris_rect.height / (500 / 20);
> -  if (data->iris_block < 8)
> -    data->iris_block = 8;
> +					  GDK_GC_SUBWINDOW);
> +/*   gdk_gc_set_dashes (data->iris_gc, 0, dash_list, 2); */
>  
>    g_timeout_add (20, (GSourceFunc) iris_callback, data);
>    num_iris_timeouts++;