1 /* 2 * Copyright 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <vector> 20 21 #include <android/gui/ActivePicture.h> 22 #include <android/gui/IActivePictureListener.h> 23 24 namespace android { 25 26 class Layer; 27 class LayerFE; 28 struct CompositionResult; 29 30 // Keeps track of active pictures - layers that are undergoing picture processing. 31 class ActivePictureTracker { 32 public: 33 typedef std::vector<sp<gui::IActivePictureListener>> Listeners; 34 35 // Called for each visible layer when SurfaceFlinger finishes composing. 36 void onLayerComposed(const Layer& layer, const LayerFE& layerFE, 37 const CompositionResult& result); 38 39 // Update internals and return whether the set of active pictures have changed. 40 void updateAndNotifyListeners(const Listeners& activePictureListenersToAdd, 41 const Listeners& activePictureListenersToRemove); 42 43 // The current set of active pictures. 44 const std::vector<gui::ActivePicture>& getActivePictures() const; 45 46 private: 47 Listeners updateListeners(const Listeners& listenersToAdd, const Listeners& listenersToRemove); 48 bool updateAndHasChanged(); 49 50 std::vector<gui::ActivePicture> mOldActivePictures; 51 std::vector<gui::ActivePicture> mNewActivePictures; 52 Listeners mListeners; 53 }; 54 55 } // namespace android 56