TaskSnapshotCache.java revision 02886a82d876aa5e31a92444fec70208599c509c 
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
17package com.android.server.wm;
18
19import android.annotation.Nullable;
20import android.graphics.GraphicBuffer;
21import android.util.ArrayMap;
22
23/**
24 * Caches snapshots. See {@link TaskSnapshotController}.
25 * <p>
26 * Access to this class should be guarded by the global window manager lock.
27 */
28class TaskSnapshotCache {
29
30    private final ArrayMap<Task, GraphicBuffer> mCache = new ArrayMap<>();
31
32    void putSnapshot(Task task, GraphicBuffer snapshot) {
33        mCache.put(task, snapshot);
34    }
35
36    @Nullable GraphicBuffer getSnapshot(Task task) {
37        return mCache.get(task);
38    }
39}
40