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
LayerVector(const LayerVector & rhs)24 LayerVector::LayerVector(const LayerVector& rhs) : SortedVector<sp<Layer>>(rhs) {
25 }
26
27 LayerVector::~LayerVector() = default;
28
do_compare(const void * lhs,const void * rhs) const29 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
traverseInZOrder(StateSet stateSet,const Visitor & visitor) const48 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
traverseInReverseZOrder(StateSet stateSet,const Visitor & visitor) const60 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