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Commit a89f063a authored by Treehugger Robot's avatar Treehugger Robot Committed by Android (Google) Code Review
Browse files

Merge "Remove ScopedAddToTraversalPath" into main

parents b0ef4111 f1a53407

services/surfaceflinger/FrontEnd/LayerHierarchy.cpp

+18 −39
Original line number Diff line number Diff line
@@ -54,7 +54,8 @@ LayerHierarchy::LayerHierarchy(const LayerHierarchy& hierarchy, bool childrenOnl 
    mChildren = hierarchy.mChildren;

}



void LayerHierarchy::traverse(const Visitor& visitor, LayerHierarchy::TraversalPath& traversalPath,

void LayerHierarchy::traverse(const Visitor& visitor,

                              const LayerHierarchy::TraversalPath& traversalPath,

                              uint32_t depth) const {

    LLOG_ALWAYS_FATAL_WITH_TRACE_IF(depth > 50,

                                    "Cycle detected in LayerHierarchy::traverse. See "
@@ -70,14 +71,13 @@ void LayerHierarchy::traverse(const Visitor& visitor, LayerHierarchy::TraversalP 
    LLOG_ALWAYS_FATAL_WITH_TRACE_IF(traversalPath.hasRelZLoop(), "Found relative z loop layerId:%d",

                                    traversalPath.invalidRelativeRootId);

    for (auto& [child, childVariant] : mChildren) {

        ScopedAddToTraversalPath addChildToTraversalPath(traversalPath, child->mLayer->id,

                                                         childVariant);

        child->traverse(visitor, traversalPath, depth + 1);

        child->traverse(visitor, traversalPath.makeChild(child->mLayer->id, childVariant),

                        depth + 1);

    }

}



void LayerHierarchy::traverseInZOrder(const Visitor& visitor,

                                      LayerHierarchy::TraversalPath& traversalPath) const {

                                      const LayerHierarchy::TraversalPath& traversalPath) const {

    bool traverseThisLayer = (mLayer != nullptr);

    for (auto it = mChildren.begin(); it < mChildren.end(); it++) {

        auto& [child, childVariant] = *it;
@@ -91,9 +91,7 @@ void LayerHierarchy::traverseInZOrder(const Visitor& visitor, 
        if (childVariant == LayerHierarchy::Variant::Detached) {

            continue;

        }

        ScopedAddToTraversalPath addChildToTraversalPath(traversalPath, child->mLayer->id,

                                                         childVariant);

        child->traverseInZOrder(visitor, traversalPath);

        child->traverseInZOrder(visitor, traversalPath.makeChild(child->mLayer->id, childVariant));

    }



    if (traverseThisLayer) {
@@ -568,42 +566,23 @@ std::string LayerHierarchy::TraversalPath::toString() const { 
    return ss.str();

}



// Helper class to update a passed in TraversalPath when visiting a child. When the object goes out

// of scope the TraversalPath is reset to its original state.

LayerHierarchy::ScopedAddToTraversalPath::ScopedAddToTraversalPath(TraversalPath& traversalPath,

                                                                   uint32_t layerId,

                                                                   LayerHierarchy::Variant variant)

      : mTraversalPath(traversalPath), mParentPath(traversalPath) {

    // Update the traversal id with the child layer id and variant. Parent id and variant are

    // stored to reset the id upon destruction.

    traversalPath.id = layerId;

    traversalPath.variant = variant;

LayerHierarchy::TraversalPath LayerHierarchy::TraversalPath::makeChild(

        uint32_t layerId, LayerHierarchy::Variant variant) const {

    TraversalPath child{*this};

    child.id = layerId;

    child.variant = variant;

    if (LayerHierarchy::isMirror(variant)) {

        traversalPath.mirrorRootIds.emplace_back(mParentPath.id);

        child.mirrorRootIds.emplace_back(id);

    } else if (variant == LayerHierarchy::Variant::Relative) {

        if (std::find(traversalPath.relativeRootIds.begin(), traversalPath.relativeRootIds.end(),

                      layerId) != traversalPath.relativeRootIds.end()) {

            traversalPath.invalidRelativeRootId = layerId;

        if (std::find(relativeRootIds.begin(), relativeRootIds.end(), layerId) !=

            relativeRootIds.end()) {

            child.invalidRelativeRootId = layerId;

        }

        traversalPath.relativeRootIds.emplace_back(layerId);

        child.relativeRootIds.emplace_back(layerId);

    } else if (variant == LayerHierarchy::Variant::Detached) {

        traversalPath.detached = true;

        child.detached = true;

    }

}

LayerHierarchy::ScopedAddToTraversalPath::~ScopedAddToTraversalPath() {

    // Reset the traversal id to its original parent state using the state that was saved in

    // the constructor.

    if (LayerHierarchy::isMirror(mTraversalPath.variant)) {

        mTraversalPath.mirrorRootIds.pop_back();

    } else if (mTraversalPath.variant == LayerHierarchy::Variant::Relative) {

        mTraversalPath.relativeRootIds.pop_back();

    }

    if (mTraversalPath.invalidRelativeRootId == mTraversalPath.id) {

        mTraversalPath.invalidRelativeRootId = UNASSIGNED_LAYER_ID;

    }

    mTraversalPath.id = mParentPath.id;

    mTraversalPath.variant = mParentPath.variant;

    mTraversalPath.detached = mParentPath.detached;

    return child;

}



} // namespace android::surfaceflinger::frontend

services/surfaceflinger/FrontEnd/LayerHierarchy.h

+5 −14
Original line number Diff line number Diff line
@@ -104,6 +104,8 @@ public: 


        TraversalPath getClonedFrom() const { return {.id = id, .variant = variant}; }



        TraversalPath makeChild(uint32_t layerId, LayerHierarchy::Variant variant) const;



        bool operator==(const TraversalPath& other) const {

            return id == other.id && mirrorRootIds == other.mirrorRootIds;

        }
@@ -122,18 +124,6 @@ public: 
        }

    };



    // Helper class to add nodes to an existing traversal id and removes the

    // node when it goes out of scope.

    class ScopedAddToTraversalPath {

    public:

        ScopedAddToTraversalPath(TraversalPath& traversalPath, uint32_t layerId,

                                 LayerHierarchy::Variant variantArg);

        ~ScopedAddToTraversalPath();



    private:

        TraversalPath& mTraversalPath;

        TraversalPath mParentPath;

    };

    LayerHierarchy(RequestedLayerState* layer);



    // Visitor function that provides the hierarchy node and a traversal id which uniquely
@@ -191,8 +181,9 @@ private: 
    void removeChild(LayerHierarchy*);

    void sortChildrenByZOrder();

    void updateChild(LayerHierarchy*, LayerHierarchy::Variant);

    void traverseInZOrder(const Visitor& visitor, LayerHierarchy::TraversalPath& parent) const;

    void traverse(const Visitor& visitor, LayerHierarchy::TraversalPath& parent,

    void traverseInZOrder(const Visitor& visitor,

                          const LayerHierarchy::TraversalPath& parent) const;

    void traverse(const Visitor& visitor, const LayerHierarchy::TraversalPath& parent,

                  uint32_t depth = 0) const;

    void dump(std::ostream& out, const std::string& prefix, LayerHierarchy::Variant variant,

              bool isLastChild, bool includeMirroredHierarchy) const;

services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.cpp

+10 −13
Original line number Diff line number Diff line
@@ -447,15 +447,14 @@ void LayerSnapshotBuilder::updateSnapshots(const Args& args) { 
    if (args.root.getLayer()) {

        // The hierarchy can have a root layer when used for screenshots otherwise, it will have

        // multiple children.

        LayerHierarchy::ScopedAddToTraversalPath addChildToPath(root, args.root.getLayer()->id,

                                                                LayerHierarchy::Variant::Attached);

        updateSnapshotsInHierarchy(args, args.root, root, rootSnapshot, /*depth=*/0);

        LayerHierarchy::TraversalPath childPath =

                root.makeChild(args.root.getLayer()->id, LayerHierarchy::Variant::Attached);

        updateSnapshotsInHierarchy(args, args.root, childPath, rootSnapshot, /*depth=*/0);

    } else {

        for (auto& [childHierarchy, variant] : args.root.mChildren) {

            LayerHierarchy::ScopedAddToTraversalPath addChildToPath(root,

                                                                    childHierarchy->getLayer()->id,

                                                                    variant);

            updateSnapshotsInHierarchy(args, *childHierarchy, root, rootSnapshot, /*depth=*/0);

            LayerHierarchy::TraversalPath childPath =

                    root.makeChild(childHierarchy->getLayer()->id, variant);

            updateSnapshotsInHierarchy(args, *childHierarchy, childPath, rootSnapshot, /*depth=*/0);

        }

    }
@@ -520,7 +519,7 @@ void LayerSnapshotBuilder::update(const Args& args) { 


const LayerSnapshot& LayerSnapshotBuilder::updateSnapshotsInHierarchy(

        const Args& args, const LayerHierarchy& hierarchy,

        LayerHierarchy::TraversalPath& traversalPath, const LayerSnapshot& parentSnapshot,

        const LayerHierarchy::TraversalPath& traversalPath, const LayerSnapshot& parentSnapshot,

        int depth) {

    LLOG_ALWAYS_FATAL_WITH_TRACE_IF(depth > 50,

                                    "Cycle detected in LayerSnapshotBuilder. See "
@@ -549,12 +548,10 @@ const LayerSnapshot& LayerSnapshotBuilder::updateSnapshotsInHierarchy( 


    bool childHasValidFrameRate = false;

    for (auto& [childHierarchy, variant] : hierarchy.mChildren) {

        LayerHierarchy::ScopedAddToTraversalPath addChildToPath(traversalPath,

                                                                childHierarchy->getLayer()->id,

                                                                variant);

        LayerHierarchy::TraversalPath childPath =

                traversalPath.makeChild(childHierarchy->getLayer()->id, variant);

        const LayerSnapshot& childSnapshot =

                updateSnapshotsInHierarchy(args, *childHierarchy, traversalPath, *snapshot,

                                           depth + 1);

                updateSnapshotsInHierarchy(args, *childHierarchy, childPath, *snapshot, depth + 1);

        updateFrameRateFromChildSnapshot(*snapshot, childSnapshot, *childHierarchy->getLayer(),

                                         args, &childHasValidFrameRate);

    }

services/surfaceflinger/FrontEnd/LayerSnapshotBuilder.h

+4 −3
Original line number Diff line number Diff line
@@ -106,9 +106,10 @@ private: 


    void updateSnapshots(const Args& args);



    const LayerSnapshot& updateSnapshotsInHierarchy(const Args&, const LayerHierarchy& hierarchy,

                                                    LayerHierarchy::TraversalPath& traversalPath,

                                                    const LayerSnapshot& parentSnapshot, int depth);

    const LayerSnapshot& updateSnapshotsInHierarchy(

            const Args&, const LayerHierarchy& hierarchy,

            const LayerHierarchy::TraversalPath& traversalPath, const LayerSnapshot& parentSnapshot,

            int depth);

    void updateSnapshot(LayerSnapshot&, const Args&, const RequestedLayerState&,

                        const LayerSnapshot& parentSnapshot, const LayerHierarchy::TraversalPath&);

    static void updateRelativeState(LayerSnapshot& snapshot, const LayerSnapshot& parentSnapshot,

services/surfaceflinger/LayerProtoHelper.cpp

+9 −14
Original line number Diff line number Diff line
@@ -278,10 +278,9 @@ LayerProtoFromSnapshotGenerator& LayerProtoFromSnapshotGenerator::with( 
            stackIdsToSkip.find(child->getLayer()->layerStack.id) != stackIdsToSkip.end()) {

            continue;

        }

        frontend::LayerHierarchy::ScopedAddToTraversalPath addChildToPath(path,

                                                                          child->getLayer()->id,

                                                                          variant);

        LayerProtoFromSnapshotGenerator::writeHierarchyToProto(*child, path);

        LayerProtoFromSnapshotGenerator::writeHierarchyToProto(*child,

                                                               path.makeChild(child->getLayer()->id,

                                                                              variant));

    }



    // fill in relative and parent info
@@ -338,7 +337,8 @@ LayerProtoFromSnapshotGenerator& LayerProtoFromSnapshotGenerator::withOffscreenL 
}



frontend::LayerSnapshot* LayerProtoFromSnapshotGenerator::getSnapshot(

        frontend::LayerHierarchy::TraversalPath& path, const frontend::RequestedLayerState& layer) {

        const frontend::LayerHierarchy::TraversalPath& path,

        const frontend::RequestedLayerState& layer) {

    frontend::LayerSnapshot* snapshot = mSnapshotBuilder.getSnapshot(path);

    if (snapshot) {

        return snapshot;
@@ -349,7 +349,7 @@ frontend::LayerSnapshot* LayerProtoFromSnapshotGenerator::getSnapshot( 
}



void LayerProtoFromSnapshotGenerator::writeHierarchyToProto(

        const frontend::LayerHierarchy& root, frontend::LayerHierarchy::TraversalPath& path) {

        const frontend::LayerHierarchy& root, const frontend::LayerHierarchy::TraversalPath& path) {

    using Variant = frontend::LayerHierarchy::Variant;

    perfetto::protos::LayerProto* layerProto = mLayersProto.add_layers();

    const frontend::RequestedLayerState& layer = *root.getLayer();
@@ -362,10 +362,8 @@ void LayerProtoFromSnapshotGenerator::writeHierarchyToProto( 
    LayerProtoHelper::writeSnapshotToProto(layerProto, layer, *snapshot, mTraceFlags);



    for (const auto& [child, variant] : root.mChildren) {

        frontend::LayerHierarchy::ScopedAddToTraversalPath addChildToPath(path,

                                                                          child->getLayer()->id,

                                                                          variant);

        frontend::LayerSnapshot* childSnapshot = getSnapshot(path, layer);

        frontend::LayerSnapshot* childSnapshot =

                getSnapshot(path.makeChild(child->getLayer()->id, variant), layer);

        if (variant == Variant::Attached || variant == Variant::Detached ||

            frontend::LayerHierarchy::isMirror(variant)) {

            mChildToParent[childSnapshot->uniqueSequence] = snapshot->uniqueSequence;
@@ -388,10 +386,7 @@ void LayerProtoFromSnapshotGenerator::writeHierarchyToProto( 
        if (variant == Variant::Detached) {

            continue;

        }

        frontend::LayerHierarchy::ScopedAddToTraversalPath addChildToPath(path,

                                                                          child->getLayer()->id,

                                                                          variant);

        writeHierarchyToProto(*child, path);

        writeHierarchyToProto(*child, path.makeChild(child->getLayer()->id, variant));

    }

}