commit ab0c319824632c463ea624cee6f0bc3c8cd8a779
author Chia-I Wu <olv@google.com> Tue Aug 01 11:29:00 2017 -0700
committer Chia-I Wu <olv@google.com> Wed Aug 02 14:13:02 2017 -0700
tree 61262143a15424ea11f6a6749b333c09a5d63588
parent 37d8c19a193d41b535e91a8ea1637938f5a10faf

libsurfaceflinger: handle WINDOW_TYPE_DONT_SCREENSHOT

When a layer has type WINDOW_TYPE_DONT_SCREENSHOT, hide it from
everywhere but the primary display.  This should be reverted when we
switch to use layer hierarchy properly.

Bug: 63311708
Test: screencap, screenrecord, android.view.cts.SurfaceViewSyncTest
Change-Id: I6a8d6b93399b0dc42832588f9a6c5e8879a8b754

services/surfaceflinger/Layer.h

diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 392479f..2306d1a 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -166,6 +166,8 @@
 
     virtual ~Layer();
 
+    void setPrimaryDisplayOnly() { mPrimaryDisplayOnly = true; }
+
     // the this layer's size and format
     status_t setBuffers(uint32_t w, uint32_t h, PixelFormat format, uint32_t flags);
 
@@ -249,6 +251,10 @@
     uint32_t getTransactionFlags(uint32_t flags);
     uint32_t setTransactionFlags(uint32_t flags);
 
+    bool belongsToDisplay(uint32_t layerStack, bool isPrimaryDisplay) const {
+        return getLayerStack() == layerStack && (!mPrimaryDisplayOnly || isPrimaryDisplay);
+    }
+
     void computeGeometry(const sp<const DisplayDevice>& hw, Mesh& mesh,
             bool useIdentityTransform) const;
     Rect computeBounds(const Region& activeTransparentRegion) const;
@@ -701,6 +707,8 @@
     String8 mTransactionName; // A cached version of "TX - " + mName for systraces
     PixelFormat mFormat;
 
+    bool mPrimaryDisplayOnly = false;
+
     // these are protected by an external lock
     State mCurrentState;
     State mDrawingState;