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/*
* 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
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