add a layerStack attribute to Layers.

this attribute can be set through a regular transaction using
SurfaceComposerClient (just like any other attribute, eg: position or size)

Change-Id: I701a47c677ea6442ca713728a93335328cd2b172

1 files changed, 4 insertions, 0 deletions

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 8da2543..b70c720 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1572,6 +1572,10 @@ uint32_t SurfaceFlinger::setClientStateLocked(
             if (layer->setCrop(s.crop))
                 flags |= eTraversalNeeded;
         }
+        if (what & eLayerStackChanged) {
+            if (layer->setLayerStack(s.layerStack))
+                flags |= eTraversalNeeded;
+        }
     }
     return flags;
 }