[sf] Properly update clones of clones
When updating a cloned layer hierarchy that contains
another cloned layer hierarchy, we are dependent on
the order in which we update each hierarchy.
The inner cloned hierarchy must be updated first
otherwise the outer clone will not capture the entire
tree and some layers might be omitted from
composition.
To fix this we track all layer mirror roots. When updating
each root, we check to see if they mirror another root. If
they do mirror another root and that root has not been updated,
we update the root again at the end.
Test: repro steps in bug
Fixes: 279622227
Change-Id: I07e3f2c89d62d44455fda9fe3f8203215c22abf7
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 9e40d7f..bbf8551 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -254,7 +254,8 @@
mFlinger->mTunnelModeEnabledReporter->decrementTunnelModeCount();
}
if (mHadClonedChild) {
- mFlinger->mNumClones--;
+ auto& roots = mFlinger->mLayerMirrorRoots;
+ roots.erase(std::remove(roots.begin(), roots.end(), this), roots.end());
}
if (hasTrustedPresentationListener()) {
mFlinger->mNumTrustedPresentationListeners--;
@@ -2591,7 +2592,7 @@
mDrawingState.inputInfo = tmpInputInfo;
}
-void Layer::updateMirrorInfo() {
+bool Layer::updateMirrorInfo(const std::deque<Layer*>& cloneRootsPendingUpdates) {
if (mClonedChild == nullptr || !mClonedChild->isClonedFromAlive()) {
// If mClonedChild is null, there is nothing to mirror. If isClonedFromAlive returns false,
// it means that there is a clone, but the layer it was cloned from has been destroyed. In
@@ -2599,7 +2600,7 @@
// destroyed. The root, this layer, will still be around since the client can continue
// to hold a reference, but no cloned layers will be displayed.
mClonedChild = nullptr;
- return;
+ return true;
}
std::map<sp<Layer>, sp<Layer>> clonedLayersMap;
@@ -2614,6 +2615,13 @@
mClonedChild->updateClonedDrawingState(clonedLayersMap);
mClonedChild->updateClonedChildren(sp<Layer>::fromExisting(this), clonedLayersMap);
mClonedChild->updateClonedRelatives(clonedLayersMap);
+
+ for (Layer* root : cloneRootsPendingUpdates) {
+ if (clonedLayersMap.find(sp<Layer>::fromExisting(root)) != clonedLayersMap.end()) {
+ return false;
+ }
+ }
+ return true;
}
void Layer::updateClonedDrawingState(std::map<sp<Layer>, sp<Layer>>& clonedLayersMap) {
@@ -2761,7 +2769,7 @@
void Layer::setClonedChild(const sp<Layer>& clonedChild) {
mClonedChild = clonedChild;
mHadClonedChild = true;
- mFlinger->mNumClones++;
+ mFlinger->mLayerMirrorRoots.push_back(this);
}
bool Layer::setDropInputMode(gui::DropInputMode mode) {