Render full-screen windows as opaque and shadowless.

Signed-off-by: Darren Salt <linux@youustbejoking.demon.co.uk>

Index: src/compositor.c
===================================================================
--- src/compositor.c	(revision 22201)
+++ src/compositor.c	(working copy)
@@ -68,12 +68,13 @@
                                          !FLAG_TEST (cw->c->flags, CLIENT_FLAG_FULLSCREEN))
 #define WIN_IS_OVERRIDE(cw)             (cw->c == NULL)
 #define WIN_IS_ARGB(cw)                 (cw->argb)
-#define WIN_IS_OPAQUE(cw)               (((cw->opacity == NET_WM_OPAQUE) && !WIN_IS_ARGB(cw)) || (cw->screen_info->overlays))
+#define WIN_IS_OPAQUE(cw)               (((cw->opacity == NET_WM_OPAQUE) && !WIN_IS_ARGB(cw)) || (cw->screen_info->overlays) || WIN_IS_FULLSCREEN(cw))
 #define WIN_IS_NATIVE_OPAQUE(cw)        ((cw->native_opacity) && !WIN_IS_ARGB(cw))
-#define WIN_IS_FULLSCREEN(cw)           ((cw->attr.x <= 0) && \
+#define WIN_IS_FULLSCREEN(cw)           ((cw->c && FLAG_TEST (cw->c->flags, CLIENT_FLAG_FULLSCREEN)) || \
+                                        ((cw->attr.x <= 0) && \
                                          (cw->attr.y <= 0) && \
                                          (cw->attr.width >= cw->screen_info->width) && \
-                                         (cw->attr.height >= cw->screen_info->height))
+                                         (cw->attr.height >= cw->screen_info->height)))
 #define WIN_IS_SHAPED(cw)               ((!WIN_IS_OVERRIDE(cw) && FLAG_TEST (cw->c->flags, CLIENT_FLAG_HAS_SHAPE)) || \
                                          (WIN_IS_OVERRIDE(cw) && (cw->shaped)))
 #define WIN_IS_VIEWABLE(cw)             (cw->viewable)
@@ -836,13 +837,14 @@
          windows,
        - it's an override redirect window that is not shaped, not an argb and
          the user asked for shadows on so called "popup" windows.
+       We don't apply shadows to full-screen windows. There's no point.
      */
 
     if (!(screen_info->overlays) &&
          ((WIN_IS_OVERRIDE(cw) && 
              !(WIN_IS_ARGB(cw) || WIN_IS_SHAPED(cw)) && 
              screen_info->params->show_popup_shadow) || 
-         (!WIN_IS_OVERRIDE(cw) && 
+         (!WIN_IS_OVERRIDE(cw) && !WIN_IS_FULLSCREEN(cw) && 
              (WIN_HAS_FRAME(cw) || !(WIN_IS_ARGB(cw) || WIN_IS_SHAPED(cw))) && 
              screen_info->params->show_frame_shadow)))
     {
@@ -1233,7 +1235,8 @@
 
         if (cw->picture)
         {
-            if ((cw->opacity != NET_WM_OPAQUE) && !(cw->alphaPict))
+            if ((cw->opacity != NET_WM_OPAQUE) && !(cw->alphaPict) && 
+                !WIN_IS_FULLSCREEN(cw))
             {
                 cw->alphaPict = solid_picture (screen_info, FALSE,
                                                (double) cw->opacity / NET_WM_OPAQUE, 0, 0, 0);