Introduce eCanOccludePresentation layer flag

Sets a property on a layer hierarchy indicating that its visible region
should be considered when computing TrustedPresentation
Thresholds. This property is set on a layer and inherited by all its
children. The property is then passed via windowinfos so the
TrustedPresentation controller can determine which windows to
use when computing the thresholds.

Test: presubmit
Bug: b/275574214
Change-Id: Ide384c64cb7b5a9b2b3ce293b20e2be64da8ad69

1 files changed, 7 insertions, 1 deletions

diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index 38fab9cdaa..7564c26316 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -199,7 +199,7 @@ status_t layer_state_t::write(Parcel& output) const
     SAFE_PARCEL(output.writeParcelable, trustedPresentationListener);
     SAFE_PARCEL(output.writeFloat, currentHdrSdrRatio);
     SAFE_PARCEL(output.writeFloat, desiredHdrSdrRatio);
-    SAFE_PARCEL(output.writeInt32, static_cast<int32_t>(cachingHint))
+    SAFE_PARCEL(output.writeInt32, static_cast<int32_t>(cachingHint));
     return NO_ERROR;
 }
 
@@ -484,6 +484,12 @@ void layer_state_t::sanitize(int32_t permissions) {
             flags &= ~eLayerIsDisplayDecoration;
             ALOGE("Stripped attempt to set LayerIsDisplayDecoration in sanitize");
         }
+        if ((mask & eCanOccludePresentation) &&
+            !(permissions & Permission::ACCESS_SURFACE_FLINGER)) {
+            flags &= ~eCanOccludePresentation;
+            mask &= ~eCanOccludePresentation;
+            ALOGE("Stripped attempt to set eCanOccludePresentation in sanitize");
+        }
     }
 
     if (what & layer_state_t::eInputInfoChanged) {