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60 lines
1.9 KiB
60 lines
1.9 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H
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#define ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H
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#include <utils/SortedVector.h>
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#include <utils/RefBase.h>
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#include <functional>
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namespace android {
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class Layer;
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/*
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* Used by the top-level SurfaceFlinger state and individual layers
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* to track layers they own sorted according to Z-order. Provides traversal
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* functions for traversing all owned layers, and their descendents.
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*/
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class LayerVector : public SortedVector<sp<Layer>> {
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public:
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enum class StateSet {
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Invalid,
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Current,
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Drawing,
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};
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explicit LayerVector(const StateSet stateSet);
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LayerVector(const LayerVector& rhs, const StateSet stateSet);
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~LayerVector() override;
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LayerVector& operator=(const LayerVector& rhs);
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// Sorts layer by layer-stack, Z order, and finally creation order (sequence).
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int do_compare(const void* lhs, const void* rhs) const override;
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using Visitor = std::function<void(Layer*)>;
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void traverseInReverseZOrder(StateSet stateSet, const Visitor& visitor) const;
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void traverseInZOrder(StateSet stateSet, const Visitor& visitor) const;
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void traverse(const Visitor& visitor) const;
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private:
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const StateSet mStateSet;
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};
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}
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#endif /* ANDROID_SURFACE_FLINGER_LAYER_VECTOR_H_ */
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