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/*
* 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_ */
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