| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| #ifndef ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H |
| #define ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H |
| |
| #include <utils/SortedVector.h> |
| #include <utils/RefBase.h> |
| |
| #include <functional> |
| |
| namespace android { |
| class Layer; |
| |
| /* |
| * Used by the top-level SurfaceFlinger state and individual layers |
| * to track layers they own sorted according to Z-order. Provides traversal |
| * functions for traversing all owned layers, and their descendents. |
| */ |
| class LayerVector : public SortedVector<sp<Layer>> { |
| public: |
| LayerVector(); |
| LayerVector(const LayerVector& rhs); |
| ~LayerVector() override; |
| |
| enum class StateSet { |
| Invalid, |
| Current, |
| Drawing, |
| }; |
| |
| // Sorts layer by layer-stack, Z order, and finally creation order (sequence). |
| int do_compare(const void* lhs, const void* rhs) const override; |
| |
| using Visitor = std::function<void(Layer*)>; |
| void traverseInReverseZOrder(StateSet stateSet, const Visitor& visitor) const; |
| void traverseInZOrder(StateSet stateSet, const Visitor& visitor) const; |
| }; |
| } |
| |
| #endif /* ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H_ */ |