1 /*
2 * Copyright 2021 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 <android/gui/ISurfaceComposer.h>
18 #include <gui/AidlStatusUtil.h>
19 #include <gui/WindowInfosListenerReporter.h>
20 #include "gui/WindowInfosUpdate.h"
21
22 namespace android {
23
24 using gui::DisplayInfo;
25 using gui::WindowInfo;
26 using gui::WindowInfosListener;
27 using gui::aidl_utils::statusTFromBinderStatus;
28
getInstance()29 sp<WindowInfosListenerReporter> WindowInfosListenerReporter::getInstance() {
30 static sp<WindowInfosListenerReporter> sInstance = new WindowInfosListenerReporter;
31 return sInstance;
32 }
33
addWindowInfosListener(const sp<WindowInfosListener> & windowInfosListener,const sp<gui::ISurfaceComposer> & surfaceComposer,std::pair<std::vector<gui::WindowInfo>,std::vector<gui::DisplayInfo>> * outInitialInfo)34 status_t WindowInfosListenerReporter::addWindowInfosListener(
35 const sp<WindowInfosListener>& windowInfosListener,
36 const sp<gui::ISurfaceComposer>& surfaceComposer,
37 std::pair<std::vector<gui::WindowInfo>, std::vector<gui::DisplayInfo>>* outInitialInfo) {
38 status_t status = OK;
39 {
40 std::scoped_lock lock(mListenersMutex);
41 if (mWindowInfosListeners.empty()) {
42 gui::WindowInfosListenerInfo listenerInfo;
43 binder::Status s = surfaceComposer->addWindowInfosListener(this, &listenerInfo);
44 status = statusTFromBinderStatus(s);
45 if (status == OK) {
46 mWindowInfosPublisher = std::move(listenerInfo.windowInfosPublisher);
47 mListenerId = listenerInfo.listenerId;
48 }
49 }
50
51 if (status == OK) {
52 mWindowInfosListeners.insert(windowInfosListener);
53 }
54
55 if (outInitialInfo != nullptr) {
56 outInitialInfo->first = mLastWindowInfos;
57 outInitialInfo->second = mLastDisplayInfos;
58 }
59 }
60
61 return status;
62 }
63
removeWindowInfosListener(const sp<WindowInfosListener> & windowInfosListener,const sp<gui::ISurfaceComposer> & surfaceComposer)64 status_t WindowInfosListenerReporter::removeWindowInfosListener(
65 const sp<WindowInfosListener>& windowInfosListener,
66 const sp<gui::ISurfaceComposer>& surfaceComposer) {
67 status_t status = OK;
68 {
69 std::scoped_lock lock(mListenersMutex);
70 if (mWindowInfosListeners.find(windowInfosListener) == mWindowInfosListeners.end()) {
71 return status;
72 }
73
74 if (mWindowInfosListeners.size() == 1) {
75 binder::Status s = surfaceComposer->removeWindowInfosListener(this);
76 status = statusTFromBinderStatus(s);
77 // Clear the last stored state since we're disabling updates and don't want to hold
78 // stale values
79 mLastWindowInfos.clear();
80 mLastDisplayInfos.clear();
81 }
82
83 if (status == OK) {
84 mWindowInfosListeners.erase(windowInfosListener);
85 }
86 }
87
88 return status;
89 }
90
onWindowInfosChanged(const gui::WindowInfosUpdate & update)91 binder::Status WindowInfosListenerReporter::onWindowInfosChanged(
92 const gui::WindowInfosUpdate& update) {
93 std::unordered_set<sp<WindowInfosListener>, gui::SpHash<WindowInfosListener>>
94 windowInfosListeners;
95
96 {
97 std::scoped_lock lock(mListenersMutex);
98 for (auto listener : mWindowInfosListeners) {
99 windowInfosListeners.insert(listener);
100 }
101
102 mLastWindowInfos = update.windowInfos;
103 mLastDisplayInfos = update.displayInfos;
104 }
105
106 for (auto listener : windowInfosListeners) {
107 listener->onWindowInfosChanged(update);
108 }
109
110 mWindowInfosPublisher->ackWindowInfosReceived(update.vsyncId, mListenerId);
111
112 return binder::Status::ok();
113 }
114
reconnect(const sp<gui::ISurfaceComposer> & composerService)115 void WindowInfosListenerReporter::reconnect(const sp<gui::ISurfaceComposer>& composerService) {
116 std::scoped_lock lock(mListenersMutex);
117 if (!mWindowInfosListeners.empty()) {
118 gui::WindowInfosListenerInfo listenerInfo;
119 composerService->addWindowInfosListener(this, &listenerInfo);
120 mWindowInfosPublisher = std::move(listenerInfo.windowInfosPublisher);
121 mListenerId = listenerInfo.listenerId;
122 }
123 }
124
125 } // namespace android
126