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/*
* Copyright 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <vector>
#include <android/gui/ActivePicture.h>
#include <android/gui/IActivePictureListener.h>
namespace android {
class Layer;
class LayerFE;
struct CompositionResult;
// Keeps track of active pictures - layers that are undergoing picture processing.
class ActivePictureTracker {
public:
typedef std::vector<sp<gui::IActivePictureListener>> Listeners;
// Called for each visible layer when SurfaceFlinger finishes composing.
void onLayerComposed(const Layer& layer, const LayerFE& layerFE,
const CompositionResult& result);
// Update internals and return whether the set of active pictures have changed.
void updateAndNotifyListeners(const Listeners& activePictureListenersToAdd,
const Listeners& activePictureListenersToRemove);
// The current set of active pictures.
const std::vector<gui::ActivePicture>& getActivePictures() const;
private:
Listeners updateListeners(const Listeners& listenersToAdd, const Listeners& listenersToRemove);
bool updateAndHasChanged();
std::vector<gui::ActivePicture> mOldActivePictures;
std::vector<gui::ActivePicture> mNewActivePictures;
Listeners mListeners;
};
} // namespace android
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