| /* |
| * 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; |
| 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.Point; |
| 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; |
| } |
| |
| static class PreRLegacySnapshotConfig { |
| /** |
| * If isPreRLegacy is {@code true}, specifies the scale the snapshot was taken at |
| */ |
| final float mScale; |
| |
| /** |
| * If {@code true}, always load *_reduced.jpg file, no matter what was requested |
| */ |
| final boolean mForceLoadReducedJpeg; |
| |
| PreRLegacySnapshotConfig(float scale, boolean forceLoadReducedJpeg) { |
| mScale = scale; |
| mForceLoadReducedJpeg = forceLoadReducedJpeg; |
| } |
| } |
| |
| /** |
| * When device is upgraded, we might be loading a legacy snapshot. In those cases, |
| * restore the scale based on how it was configured historically. See history of |
| * TaskSnapshotPersister for more information. |
| * |
| * | low_ram=false | low_ram=true |
| * +------------------------------------------------------------------------------+ |
| * O | *.jpg = 100%, *_reduced.jpg = 50% | |
| * | +-----------------------------------------| |
| * P | | *.jpg = NONE, *_reduced.jpg = 60% | |
| * +------------------------------------+-----------------------------------------+ |
| * Q | *.jpg = proto.scale, | *.jpg = NONE, | |
| * | *_reduced.jpg = 50% * proto.scale | *_reduced.jpg = proto.scale | |
| * +------------------------------------+-----------------------------------------+ |
| * |
| * @return null if Android R, otherwise a PreRLegacySnapshotConfig object |
| */ |
| PreRLegacySnapshotConfig getLegacySnapshotConfig(int taskWidth, float legacyScale, |
| boolean highResFileExists, boolean loadLowResolutionBitmap) { |
| float preRLegacyScale = 0; |
| boolean forceLoadReducedJpeg = false; |
| boolean isPreRLegacySnapshot = (taskWidth == 0); |
| if (!isPreRLegacySnapshot) { |
| return null; |
| } |
| final boolean isPreQLegacyProto = isPreRLegacySnapshot |
| && (Float.compare(legacyScale, 0f) == 0); |
| |
| if (isPreQLegacyProto) { |
| // Android O or Android P |
| if (ActivityManager.isLowRamDeviceStatic() && !highResFileExists) { |
| // Android P w/ low_ram=true |
| preRLegacyScale = 0.6f; |
| // Force bitmapFile to always be *_reduced.jpg |
| forceLoadReducedJpeg = true; |
| } else { |
| // Android O, OR Android P w/ low_ram=false |
| preRLegacyScale = loadLowResolutionBitmap ? 0.5f : 1.0f; |
| } |
| } else if (isPreRLegacySnapshot) { |
| // If not pre-Q but is pre-R, then it must be Android Q |
| if (ActivityManager.isLowRamDeviceStatic()) { |
| preRLegacyScale = legacyScale; |
| // Force bitmapFile to always be *_reduced.jpg |
| forceLoadReducedJpeg = true; |
| } else { |
| preRLegacyScale = |
| loadLowResolutionBitmap ? 0.5f * legacyScale : legacyScale; |
| } |
| } |
| return new PreRLegacySnapshotConfig(preRLegacyScale, forceLoadReducedJpeg); |
| } |
| |
| /** |
| * 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 loadLowResolutionBitmap Whether to load a low resolution 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 loadLowResolutionBitmap) { |
| final File protoFile = mPersister.getProtoFile(taskId, userId); |
| if (!protoFile.exists()) { |
| return null; |
| } |
| try { |
| final byte[] bytes = Files.readAllBytes(protoFile.toPath()); |
| final TaskSnapshotProto proto = TaskSnapshotProto.parseFrom(bytes); |
| final File highResBitmap = mPersister.getHighResolutionBitmapFile(taskId, userId); |
| |
| PreRLegacySnapshotConfig legacyConfig = getLegacySnapshotConfig(proto.taskWidth, |
| proto.legacyScale, highResBitmap.exists(), loadLowResolutionBitmap); |
| |
| boolean forceLoadReducedJpeg = |
| legacyConfig != null && legacyConfig.mForceLoadReducedJpeg; |
| File bitmapFile = (loadLowResolutionBitmap || forceLoadReducedJpeg) |
| ? mPersister.getLowResolutionBitmapFile(taskId, userId) : highResBitmap; |
| |
| if (!bitmapFile.exists()) { |
| return null; |
| } |
| |
| 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); |
| |
| Point taskSize; |
| if (legacyConfig != null) { |
| int taskWidth = (int) ((float) hwBitmap.getWidth() / legacyConfig.mScale); |
| int taskHeight = (int) ((float) hwBitmap.getHeight() / legacyConfig.mScale); |
| taskSize = new Point(taskWidth, taskHeight); |
| } else { |
| taskSize = new Point(proto.taskWidth, proto.taskHeight); |
| } |
| |
| return new TaskSnapshot(proto.id, topActivityComponent, buffer, |
| hwBitmap.getColorSpace(), proto.orientation, proto.rotation, taskSize, |
| new Rect(proto.insetLeft, proto.insetTop, proto.insetRight, proto.insetBottom), |
| loadLowResolutionBitmap, 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; |
| } |
| } |
| } |