1 /* 2 * Copyright (C) 2016 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 #ifndef ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H 18 #define ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H 19 20 #include <utils/SortedVector.h> 21 #include <utils/RefBase.h> 22 23 #include <functional> 24 25 namespace android { 26 class Layer; 27 28 /* 29 * Used by the top-level SurfaceFlinger state and individual layers 30 * to track layers they own sorted according to Z-order. Provides traversal 31 * functions for traversing all owned layers, and their descendents. 32 */ 33 class LayerVector : public SortedVector<sp<Layer>> { 34 public: 35 LayerVector(); 36 LayerVector(const LayerVector& rhs); 37 ~LayerVector() override; 38 39 enum class StateSet { 40 Invalid, 41 Current, 42 Drawing, 43 }; 44 45 // Sorts layer by layer-stack, Z order, and finally creation order (sequence). 46 int do_compare(const void* lhs, const void* rhs) const override; 47 48 using Visitor = std::function<void(Layer*)>; 49 void traverseInReverseZOrder(StateSet stateSet, const Visitor& visitor) const; 50 void traverseInZOrder(StateSet stateSet, const Visitor& visitor) const; 51 }; 52 } 53 54 #endif /* ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H_ */ 55
