| /* |
| * Copyright (C) 2017 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 |
| */ |
| |
| package com.android.server.wm; |
| |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM; |
| |
| import android.app.ActivityManager.TaskSnapshot; |
| import android.content.ComponentName; |
| import android.graphics.Bitmap; |
| import android.graphics.Bitmap.Config; |
| import android.graphics.BitmapFactory; |
| import android.graphics.BitmapFactory.Options; |
| import android.graphics.GraphicBuffer; |
| import android.graphics.Rect; |
| import android.util.Slog; |
| |
| import com.android.server.wm.nano.WindowManagerProtos.TaskSnapshotProto; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| |
| /** |
| * Loads a persisted {@link TaskSnapshot} from disk. |
| * <p> |
| * Do not hold the window manager lock when accessing this class. |
| * <p> |
| * Test class: {@link TaskSnapshotPersisterLoaderTest} |
| */ |
| class TaskSnapshotLoader { |
| |
| private static final String TAG = TAG_WITH_CLASS_NAME ? "TaskSnapshotLoader" : TAG_WM; |
| |
| private final TaskSnapshotPersister mPersister; |
| |
| TaskSnapshotLoader(TaskSnapshotPersister persister) { |
| mPersister = persister; |
| } |
| |
| /** |
| * Loads a task from the disk. |
| * <p> |
| * Do not hold the window manager lock when calling this method, as we directly read data from |
| * disk here, which might be slow. |
| * |
| * @param taskId The id of the task to load. |
| * @param userId The id of the user the task belonged to. |
| * @param reducedResolution Whether to load a reduced resolution version of the snapshot. |
| * @return The loaded {@link TaskSnapshot} or {@code null} if it couldn't be loaded. |
| */ |
| TaskSnapshot loadTask(int taskId, int userId, boolean reducedResolution) { |
| final File protoFile = mPersister.getProtoFile(taskId, userId); |
| final File bitmapFile = reducedResolution |
| ? mPersister.getReducedResolutionBitmapFile(taskId, userId) |
| : mPersister.getBitmapFile(taskId, userId); |
| if (bitmapFile == null || !protoFile.exists() || !bitmapFile.exists()) { |
| return null; |
| } |
| try { |
| final byte[] bytes = Files.readAllBytes(protoFile.toPath()); |
| final TaskSnapshotProto proto = TaskSnapshotProto.parseFrom(bytes); |
| final Options options = new Options(); |
| options.inPreferredConfig = mPersister.use16BitFormat() && !proto.isTranslucent |
| ? Config.RGB_565 |
| : Config.ARGB_8888; |
| final Bitmap bitmap = BitmapFactory.decodeFile(bitmapFile.getPath(), options); |
| if (bitmap == null) { |
| Slog.w(TAG, "Failed to load bitmap: " + bitmapFile.getPath()); |
| return null; |
| } |
| |
| final Bitmap hwBitmap = bitmap.copy(Config.HARDWARE, false); |
| bitmap.recycle(); |
| if (hwBitmap == null) { |
| Slog.w(TAG, "Failed to create hardware bitmap: " + bitmapFile.getPath()); |
| return null; |
| } |
| final GraphicBuffer buffer = hwBitmap.createGraphicBufferHandle(); |
| if (buffer == null) { |
| Slog.w(TAG, "Failed to retrieve gralloc buffer for bitmap: " |
| + bitmapFile.getPath()); |
| return null; |
| } |
| |
| final ComponentName topActivityComponent = ComponentName.unflattenFromString( |
| proto.topActivityComponent); |
| // For legacy snapshots, restore the scale based on the reduced resolution state |
| final float legacyScale = reducedResolution ? mPersister.getReducedScale() : 1f; |
| final float scale = Float.compare(proto.scale, 0f) != 0 ? proto.scale : legacyScale; |
| return new TaskSnapshot(proto.id, topActivityComponent, buffer, |
| hwBitmap.getColorSpace(), proto.orientation, |
| new Rect(proto.insetLeft, proto.insetTop, proto.insetRight, proto.insetBottom), |
| reducedResolution, scale, proto.isRealSnapshot, proto.windowingMode, |
| proto.systemUiVisibility, proto.isTranslucent); |
| } catch (IOException e) { |
| Slog.w(TAG, "Unable to load task snapshot data for taskId=" + taskId); |
| return null; |
| } |
| } |
| } |