1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "LayerVector.h" 18 #include "Layer.h" 19 20 namespace android { 21 22 LayerVector::LayerVector() = default; 23 24 LayerVector::LayerVector(const LayerVector& rhs) : SortedVector<sp<Layer>>(rhs) { 25 } 26 27 LayerVector::~LayerVector() = default; 28 29 int LayerVector::do_compare(const void* lhs, const void* rhs) const 30 { 31 // sort layers per layer-stack, then by z-order and finally by sequence 32 const auto& l = *reinterpret_cast<const sp<Layer>*>(lhs); 33 const auto& r = *reinterpret_cast<const sp<Layer>*>(rhs); 34 35 uint32_t ls = l->getCurrentState().layerStack; 36 uint32_t rs = r->getCurrentState().layerStack; 37 if (ls != rs) 38 return ls - rs; 39 40 uint32_t lz = l->getCurrentState().z; 41 uint32_t rz = r->getCurrentState().z; 42 if (lz != rz) 43 return lz - rz; 44 45 return l->sequence - r->sequence; 46 } 47 48 void LayerVector::traverseInZOrder(StateSet stateSet, const Visitor& visitor) const { 49 for (size_t i = 0; i < size(); i++) { 50 const auto& layer = (*this)[i]; 51 auto& state = (stateSet == StateSet::Current) ? layer->getCurrentState() 52 : layer->getDrawingState(); 53 if (state.zOrderRelativeOf != nullptr) { 54 continue; 55 } 56 layer->traverseInZOrder(stateSet, visitor); 57 } 58 } 59 60 void LayerVector::traverseInReverseZOrder(StateSet stateSet, const Visitor& visitor) const { 61 for (auto i = static_cast<int64_t>(size()) - 1; i >= 0; i--) { 62 const auto& layer = (*this)[i]; 63 auto& state = (stateSet == StateSet::Current) ? layer->getCurrentState() 64 : layer->getDrawingState(); 65 if (state.zOrderRelativeOf != nullptr) { 66 continue; 67 } 68 layer->traverseInReverseZOrder(stateSet, visitor); 69 } 70 } 71 } // namespace android 72
