commit edd1360ad34c0777127b0df700f197ad4619ef66
author Robert Carr <racarr@google.com> Mon Apr 13 17:24:34 2020 -0700
committer Robert Carr <racarr@google.com> Thu May 14 20:50:52 2020 -0700
tree c71d27e5b0606b4d1d18441e91379ac6e2f0fcda
parent 9adccca5dd6186173b5049996e55e1d637dc44a6

SurfaceFlinger: Send all BufferedLayers to InputFlinger

Currently if an InputWindow is obscured by a window with
FLAG_NO_INPUT_CHANNEL or a Surface with no window (and input) at all
then InputDispatcher will not be aware of the window and it will
fail to generate FLAG_(PARTIALLY)_OCLUDED for windows underneath. To fix
this we make sure we generate an InputWindow for every buffered
element on the screen and make them all known to InputDispatcher.

Bug: 152064592
Test: ObscuredInputTests
Change-Id: I90a813be9b650dceb0a20ffbf33aa27f95d38771

services/surfaceflinger/SurfaceFlinger.cpp

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 4cd1c9b..1b2043f 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2885,7 +2885,7 @@
     std::vector<InputWindowInfo> inputHandles;
 
     mDrawingState.traverseInReverseZOrder([&](Layer* layer) {
-        if (layer->hasInput()) {
+        if (layer->needsInputInfo()) {
             // When calculating the screen bounds we ignore the transparent region since it may
             // result in an unwanted offset.
             inputHandles.push_back(layer->fillInputInfo());