android display list,DisplayList.cpp

最新推荐文章于 2023-08-23 13:53:27 发布

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最新推荐文章于 2023-08-23 13:53:27 发布

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文章标签： android display list

本文解析了Android UI渲染中的DisplayListData类，展示了如何创建、维护DisplayList及其内部资源管理，包括路径、画笔和区域的处理。

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* 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.

#define ATRACE_TAG ATRACE_TAG_VIEW

#include #include #include #include "Debug.h"

#include "DisplayList.h"

#include "DisplayListOp.h"

namespace android {

namespace uirenderer {

DisplayListData::DisplayListData()

: projectionReceiveIndex(-1)

, hasDrawOps(false) {

}

DisplayListData::~DisplayListData() {

cleanupResources();

}

void DisplayListData::cleanupResources() {

ResourceCache& resourceCache = ResourceCache::getInstance();

resourceCache.lock();

for (size_t i = 0; i < patchResources.size(); i++) {

resourceCache.decrementRefcountLocked(patchResources.itemAt(i));

}

resourceCache.unlock();

for (size_t i = 0; i < pathResources.size(); i++) {

const SkPath* path = pathResources.itemAt(i);

if (path->unique() && Caches::hasInstance()) {

Caches::getInstance().pathCache.removeDeferred(path);

}

delete path;

}

patchResources.clear();

pathResources.clear();

paints.clear();

regions.clear();

}

size_t DisplayListData::addChild(DrawRenderNodeOp* op) {

mReferenceHolders.push(op->renderNode());

return mChildren.add(op);

}

}; // namespace uirenderer

}; // namespace android

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