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/*
* Copyright 2021 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 <android/gui/ISurfaceComposer.h>
#include <gui/AidlStatusUtil.h>
#include <gui/WindowInfosListenerReporter.h>
#include "gui/WindowInfosUpdate.h"
namespace android {
using gui::DisplayInfo;
using gui::WindowInfo;
using gui::WindowInfosListener;
using gui::aidl_utils::statusTFromBinderStatus;
sp<WindowInfosListenerReporter> WindowInfosListenerReporter::getInstance() {
static sp<WindowInfosListenerReporter> sInstance = new WindowInfosListenerReporter;
return sInstance;
}
status_t WindowInfosListenerReporter::addWindowInfosListener(
const sp<WindowInfosListener>& windowInfosListener,
const sp<gui::ISurfaceComposer>& surfaceComposer,
std::pair<std::vector<gui::WindowInfo>, std::vector<gui::DisplayInfo>>* outInitialInfo) {
status_t status = OK;
{
std::scoped_lock lock(mListenersMutex);
if (mWindowInfosListeners.empty()) {
gui::WindowInfosListenerInfo listenerInfo;
binder::Status s = surfaceComposer->addWindowInfosListener(this, &listenerInfo);
status = statusTFromBinderStatus(s);
if (status == OK) {
mWindowInfosPublisher = std::move(listenerInfo.windowInfosPublisher);
mListenerId = listenerInfo.listenerId;
}
}
if (status == OK) {
mWindowInfosListeners.insert(windowInfosListener);
}
if (outInitialInfo != nullptr) {
outInitialInfo->first = mLastWindowInfos;
outInitialInfo->second = mLastDisplayInfos;
}
}
return status;
}
status_t WindowInfosListenerReporter::removeWindowInfosListener(
const sp<WindowInfosListener>& windowInfosListener,
const sp<gui::ISurfaceComposer>& surfaceComposer) {
status_t status = OK;
{
std::scoped_lock lock(mListenersMutex);
if (mWindowInfosListeners.find(windowInfosListener) == mWindowInfosListeners.end()) {
return status;
}
if (mWindowInfosListeners.size() == 1) {
binder::Status s = surfaceComposer->removeWindowInfosListener(this);
status = statusTFromBinderStatus(s);
// Clear the last stored state since we're disabling updates and don't want to hold
// stale values
mLastWindowInfos.clear();
mLastDisplayInfos.clear();
}
if (status == OK) {
mWindowInfosListeners.erase(windowInfosListener);
}
}
return status;
}
binder::Status WindowInfosListenerReporter::onWindowInfosChanged(
const gui::WindowInfosUpdate& update) {
std::unordered_set<sp<WindowInfosListener>, gui::SpHash<WindowInfosListener>>
windowInfosListeners;
{
std::scoped_lock lock(mListenersMutex);
for (auto listener : mWindowInfosListeners) {
windowInfosListeners.insert(listener);
}
mLastWindowInfos = update.windowInfos;
mLastDisplayInfos = update.displayInfos;
}
for (auto listener : windowInfosListeners) {
listener->onWindowInfosChanged(update);
}
mWindowInfosPublisher->ackWindowInfosReceived(update.vsyncId, mListenerId);
return binder::Status::ok();
}
void WindowInfosListenerReporter::reconnect(const sp<gui::ISurfaceComposer>& composerService) {
std::scoped_lock lock(mListenersMutex);
if (!mWindowInfosListeners.empty()) {
gui::WindowInfosListenerInfo listenerInfo;
composerService->addWindowInfosListener(this, &listenerInfo);
mWindowInfosPublisher = std::move(listenerInfo.windowInfosPublisher);
mListenerId = listenerInfo.listenerId;
}
}
} // namespace android
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