/*
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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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#include "LayerVector.h"
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#include "Layer.h"
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namespace android {
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LayerVector::LayerVector(const StateSet stateSet) : mStateSet(stateSet) {}
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LayerVector::LayerVector(const LayerVector& rhs, const StateSet stateSet)
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: SortedVector<sp<Layer>>(rhs), mStateSet(stateSet) {}
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LayerVector::~LayerVector() = default;
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// This operator override is needed to prevent mStateSet from getting copied over.
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LayerVector& LayerVector::operator=(const LayerVector& rhs) {
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SortedVector::operator=(rhs);
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return *this;
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}
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int LayerVector::do_compare(const void* lhs, const void* rhs) const
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{
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// sort layers per layer-stack, then by z-order and finally by sequence
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const auto& l = *reinterpret_cast<const sp<Layer>*>(lhs);
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const auto& r = *reinterpret_cast<const sp<Layer>*>(rhs);
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const auto& lState =
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(mStateSet == StateSet::Current) ? l->getCurrentState() : l->getDrawingState();
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const auto& rState =
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(mStateSet == StateSet::Current) ? r->getCurrentState() : r->getDrawingState();
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uint32_t ls = lState.layerStack;
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uint32_t rs = rState.layerStack;
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if (ls != rs)
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return (ls > rs) ? 1 : -1;
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int32_t lz = lState.z;
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int32_t rz = rState.z;
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if (lz != rz)
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return (lz > rz) ? 1 : -1;
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if (l->sequence == r->sequence)
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return 0;
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return (l->sequence > r->sequence) ? 1 : -1;
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}
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void LayerVector::traverseInZOrder(StateSet stateSet, const Visitor& visitor) const {
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for (size_t i = 0; i < size(); i++) {
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const auto& layer = (*this)[i];
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auto& state = (stateSet == StateSet::Current) ? layer->getCurrentState()
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: layer->getDrawingState();
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if (state.zOrderRelativeOf != nullptr) {
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continue;
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}
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layer->traverseInZOrder(stateSet, visitor);
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}
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}
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void LayerVector::traverseInReverseZOrder(StateSet stateSet, const Visitor& visitor) const {
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for (auto i = static_cast<int64_t>(size()) - 1; i >= 0; i--) {
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const auto& layer = (*this)[i];
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auto& state = (stateSet == StateSet::Current) ? layer->getCurrentState()
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: layer->getDrawingState();
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if (state.zOrderRelativeOf != nullptr) {
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continue;
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}
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layer->traverseInReverseZOrder(stateSet, visitor);
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}
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}
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} // namespace android
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