| /* |
| * 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(const StateSet stateSet) : mStateSet(stateSet) {} |
| |
| LayerVector::LayerVector(const LayerVector& rhs, const StateSet stateSet) |
| : SortedVector<sp<Layer>>(rhs), mStateSet(stateSet) {} |
| |
| LayerVector::~LayerVector() = default; |
| |
| // This operator override is needed to prevent mStateSet from getting copied over. |
| LayerVector& LayerVector::operator=(const LayerVector& rhs) { |
| SortedVector::operator=(rhs); |
| return *this; |
| } |
| |
| 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); |
| |
| const auto& lState = |
| (mStateSet == StateSet::Current) ? l->getCurrentState() : l->getDrawingState(); |
| const auto& rState = |
| (mStateSet == StateSet::Current) ? r->getCurrentState() : r->getDrawingState(); |
| |
| uint32_t ls = lState.layerStack; |
| uint32_t rs = rState.layerStack; |
| if (ls != rs) |
| return (ls > rs) ? 1 : -1; |
| |
| int32_t lz = lState.z; |
| int32_t rz = rState.z; |
| if (lz != rz) |
| return (lz > rz) ? 1 : -1; |
| |
| if (l->sequence == r->sequence) |
| return 0; |
| |
| return (l->sequence > r->sequence) ? 1 : -1; |
| } |
| |
| 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 |