commit f0c53d6e864abc284b267e866817b3d006944a60
author Fabien Sanglard <sanglardf@google.com> Fri Mar 03 18:58:50 2017 -0800
committer Fabien Sanglard <sanglardf@google.com> Mon Mar 06 16:36:57 2017 -0800
tree 75efb256756e6bcf83a2c39d882be0a6e8429d99
parent d07fc91a3e574f28f8ac0829dfacc772255f3e11

[SurfaceFlinger] Document layerStack

Test: None, these are only comments.
Change-Id: Id5d45a5847d253bf92263091e5b322a1577fabe1

services/surfaceflinger/DisplayDevice.h

diff --git a/services/surfaceflinger/DisplayDevice.h b/services/surfaceflinger/DisplayDevice.h
index 92ede08..caa7adc 100644
--- a/services/surfaceflinger/DisplayDevice.h
+++ b/services/surfaceflinger/DisplayDevice.h
@@ -242,7 +242,11 @@
     static status_t orientationToTransfrom(int orientation,
             int w, int h, Transform* tr);
 
+    // The identifier of the active layer stack for this display. Several displays
+    // can use the same layer stack: A z-ordered group of layers (sometimes called
+    // "surfaces"). Any given layer can only be on a single layer stack.
     uint32_t mLayerStack;
+
     int mOrientation;
     static uint32_t sPrimaryDisplayOrientation;
     // user-provided visible area of the layer stack