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 // TODO(b/129481165): remove the #pragma below and fix conversion issues
18 #pragma clang diagnostic push
19 #pragma clang diagnostic ignored "-Wconversion"
20
21 #include "LayerVector.h"
22 #include "Layer.h"
23
24 namespace android {
25
LayerVector(const StateSet stateSet)26 LayerVector::LayerVector(const StateSet stateSet) : mStateSet(stateSet) {}
27
LayerVector(const LayerVector & rhs,const StateSet stateSet)28 LayerVector::LayerVector(const LayerVector& rhs, const StateSet stateSet)
29 : SortedVector<sp<Layer>>(rhs), mStateSet(stateSet) {}
30
31 LayerVector::~LayerVector() = default;
32
33 // This operator override is needed to prevent mStateSet from getting copied over.
operator =(const LayerVector & rhs)34 LayerVector& LayerVector::operator=(const LayerVector& rhs) {
35 SortedVector::operator=(rhs);
36 return *this;
37 }
38
do_compare(const void * lhs,const void * rhs) const39 int LayerVector::do_compare(const void* lhs, const void* rhs) const
40 {
41 // sort layers per layer-stack, then by z-order and finally by sequence
42 const auto& l = *reinterpret_cast<const sp<Layer>*>(lhs);
43 const auto& r = *reinterpret_cast<const sp<Layer>*>(rhs);
44
45 const auto& lState =
46 (mStateSet == StateSet::Current) ? l->getCurrentState() : l->getDrawingState();
47 const auto& rState =
48 (mStateSet == StateSet::Current) ? r->getCurrentState() : r->getDrawingState();
49
50 uint32_t ls = lState.layerStack;
51 uint32_t rs = rState.layerStack;
52 if (ls != rs)
53 return (ls > rs) ? 1 : -1;
54
55 int32_t lz = lState.z;
56 int32_t rz = rState.z;
57 if (lz != rz)
58 return (lz > rz) ? 1 : -1;
59
60 if (l->sequence == r->sequence)
61 return 0;
62
63 return (l->sequence > r->sequence) ? 1 : -1;
64 }
65
traverseInZOrder(StateSet stateSet,const Visitor & visitor) const66 void LayerVector::traverseInZOrder(StateSet stateSet, const Visitor& visitor) const {
67 for (size_t i = 0; i < size(); i++) {
68 const auto& layer = (*this)[i];
69 auto& state = (stateSet == StateSet::Current) ? layer->getCurrentState()
70 : layer->getDrawingState();
71 if (state.isRelativeOf) {
72 continue;
73 }
74 layer->traverseInZOrder(stateSet, visitor);
75 }
76 }
77
traverseInReverseZOrder(StateSet stateSet,const Visitor & visitor) const78 void LayerVector::traverseInReverseZOrder(StateSet stateSet, const Visitor& visitor) const {
79 for (auto i = static_cast<int64_t>(size()) - 1; i >= 0; i--) {
80 const auto& layer = (*this)[i];
81 auto& state = (stateSet == StateSet::Current) ? layer->getCurrentState()
82 : layer->getDrawingState();
83 if (state.isRelativeOf) {
84 continue;
85 }
86 layer->traverseInReverseZOrder(stateSet, visitor);
87 }
88 }
89
traverse(const Visitor & visitor) const90 void LayerVector::traverse(const Visitor& visitor) const {
91 for (auto i = static_cast<int64_t>(size()) - 1; i >= 0; i--) {
92 const auto& layer = (*this)[i];
93 layer->traverse(mStateSet, visitor);
94 }
95 }
96
97 } // namespace android
98
99 // TODO(b/129481165): remove the #pragma below and fix conversion issues
100 #pragma clang diagnostic pop // ignored "-Wconversion"
101