[metacity] xrender: track decoration status

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 3ca3549c02f2627ebe7600773ccdcb99bce579fc
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Mar 17 21:11:17 2017 +0200

    xrender: track decoration status

 src/compositor/meta-compositor-xrender.c |  133 ++++++++++++++++++++++++++++++
 1 files changed, 133 insertions(+), 0 deletions(-)
---
diff --git a/src/compositor/meta-compositor-xrender.c b/src/compositor/meta-compositor-xrender.c
index 8c8a1cc..8c80e5b 100644
--- a/src/compositor/meta-compositor-xrender.c
+++ b/src/compositor/meta-compositor-xrender.c
@@ -2043,6 +2043,135 @@ notify_appears_focused_cb (MetaWindow            *window,
 }
 
 static void
+notify_decorated_cb (MetaWindow            *window,
+                     GParamSpec            *pspec,
+                     MetaCompositorXRender *xrender)
+{
+  MetaCompWindow *cw;
+  XserverRegion damage;
+
+  cw = find_comp_window_by_window (xrender, window);
+  damage = None;
+
+  if (cw == NULL)
+    return;
+
+  meta_error_trap_push (window->display);
+
+  if (cw->back_pixmap != None)
+    {
+      XFreePixmap (xrender->xdisplay, cw->back_pixmap);
+      cw->back_pixmap = None;
+    }
+
+  if (cw->mask_pixmap != None)
+    {
+      XFreePixmap (xrender->xdisplay, cw->mask_pixmap);
+      cw->mask_pixmap = None;
+    }
+
+  if (cw->shape_region != None)
+    {
+      XFixesDestroyRegion (xrender->xdisplay, cw->shape_region);
+      cw->shape_region = None;
+    }
+
+  if (cw->damage != None)
+    {
+      XDamageDestroy (xrender->xdisplay, cw->damage);
+      cw->damage = None;
+    }
+
+  if (cw->picture != None)
+    {
+      XRenderFreePicture (xrender->xdisplay, cw->picture);
+      cw->picture = None;
+    }
+
+  if (cw->mask != None)
+    {
+      XRenderFreePicture (xrender->xdisplay, cw->mask);
+      cw->mask = None;
+    }
+
+  if (cw->alpha_pict != None)
+    {
+      XRenderFreePicture (xrender->xdisplay, cw->alpha_pict);
+      cw->alpha_pict = None;
+    }
+
+  if (cw->window_region != None)
+    {
+      XFixesDestroyRegion (xrender->xdisplay, cw->window_region);
+      cw->window_region = None;
+    }
+
+  if (cw->visible_region != None)
+    {
+      XFixesDestroyRegion (xrender->xdisplay, cw->visible_region);
+      cw->visible_region = None;
+    }
+
+  if (cw->client_region != None)
+    {
+      XFixesDestroyRegion (xrender->xdisplay, cw->client_region);
+      cw->client_region = None;
+    }
+
+  if (cw->extents != None)
+    {
+      damage = cw->extents;
+      cw->extents = None;
+    }
+
+  if (cw->shadow != None)
+    {
+      XRenderFreePicture (xrender->xdisplay, cw->shadow);
+      cw->shadow = None;
+    }
+
+  if (cw->border_clip != None)
+    {
+      XFixesDestroyRegion (xrender->xdisplay, cw->border_clip);
+      cw->border_clip = None;
+    }
+
+  if (cw->shaded.back_pixmap != None)
+    {
+      XFreePixmap (xrender->xdisplay, cw->shaded.back_pixmap);
+      cw->shaded.back_pixmap = None;
+    }
+
+  if (cw->shaded.mask_pixmap != None)
+    {
+      XFreePixmap (xrender->xdisplay, cw->shaded.mask_pixmap);
+      cw->shaded.mask_pixmap = None;
+    }
+
+  if (cw->shaded.client_region != None)
+    {
+      XFixesDestroyRegion (xrender->xdisplay, cw->shaded.client_region);
+      cw->shaded.client_region = None;
+    }
+
+  cw->damage = XDamageCreate (xrender->xdisplay,
+                              get_toplevel_xwindow (window),
+                              XDamageReportNonEmpty);
+
+  determine_mode (xrender, cw);
+  cw->needs_shadow = window_has_shadow (xrender, cw);
+
+  meta_error_trap_pop (window->display);
+
+  dump_xserver_region (xrender, "notify_decorated_cb", damage);
+  add_damage (xrender, damage);
+  cw->damaged = TRUE;
+
+  xrender->clip_changed = TRUE;
+  add_repair (xrender);
+}
+
+static void
 resize_win (MetaCompositorXRender *xrender,
             MetaCompWindow        *cw,
             int                    x,
@@ -2518,6 +2647,10 @@ meta_compositor_xrender_add_window (MetaCompositor *compositor,
                            G_CALLBACK (notify_appears_focused_cb),
                            xrender, 0);
 
+  g_signal_connect_object (window, "notify::decorated",
+                           G_CALLBACK (notify_decorated_cb),
+                           xrender, 0);
+
   cw->back_pixmap = None;
   cw->mask_pixmap = None;