commit dd3cb84cfbe8068790c6233b5829fae9c4a0ee93
author Jamie Gennis <jgennis@google.com> Fri Oct 19 18:19:11 2012 -0700
committer Jamie Gennis <jgennis@google.com> Mon Oct 22 13:41:21 2012 -0700
tree 366d14c7147f365dd47f85f418e262dec0427141
parent 60393d45207b6548e1f61ca104fa59aecee87d30

SurfaceFlinger: add support for secure displays

This change adds support for displays that are not allowed to display surfaces
with the eSecure flag set.  All non-virtual displays are considered secure,
while virtual displays have their secure-ness specified at creation time.

Bug: 7368436
Change-Id: I81ad535d2d1e5a7ff78269017e85b111f0098500

services/surfaceflinger/Layer.cpp

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index c2da238..064f689 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -253,6 +253,10 @@
         layer.setSkip(true);
     }
 
+    if (isSecure() && !hw->isSecure()) {
+        layer.setSkip(true);
+    }
+
     /*
      * Transformations are applied in this order:
      * 1) buffer orientation/flip/mirror
@@ -342,7 +346,9 @@
         // is probably going to have something visibly wrong.
     }
 
-    if (!isProtected()) {
+    bool blackOutLayer = isProtected() || (isSecure() && !hw->isSecure());
+
+    if (!blackOutLayer) {
         // TODO: we could be more subtle with isFixedSize()
         const bool useFiltering = getFiltering() || needsFiltering(hw) || isFixedSize();