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