| /* |
| * Copyright (C) 2016 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 android.view.WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS; |
| import static android.view.WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS; |
| import static android.view.WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION; |
| import static android.view.WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS; |
| import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_FORCE_DRAW_BAR_BACKGROUNDS; |
| |
| import static com.android.internal.policy.DecorView.NAVIGATION_BAR_COLOR_VIEW_ATTRIBUTES; |
| import static com.android.internal.policy.DecorView.STATUS_BAR_COLOR_VIEW_ATTRIBUTES; |
| import static com.android.internal.policy.DecorView.getNavigationBarRect; |
| import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_SCREENSHOT; |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.app.ActivityManager; |
| import android.app.ActivityThread; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.PixelFormat; |
| import android.graphics.Point; |
| import android.graphics.RecordingCanvas; |
| import android.graphics.Rect; |
| import android.graphics.RenderNode; |
| import android.hardware.HardwareBuffer; |
| import android.os.Environment; |
| import android.os.Handler; |
| import android.util.ArraySet; |
| import android.util.Pair; |
| import android.util.Slog; |
| import android.view.Display; |
| import android.view.InsetsState; |
| import android.view.SurfaceControl; |
| import android.view.ThreadedRenderer; |
| import android.view.WindowInsets.Type; |
| import android.view.WindowInsetsController.Appearance; |
| import android.view.WindowManager.LayoutParams; |
| import android.window.TaskSnapshot; |
| |
| import com.android.internal.R; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.graphics.ColorUtils; |
| import com.android.internal.policy.DecorView; |
| import com.android.server.policy.WindowManagerPolicy.ScreenOffListener; |
| import com.android.server.wm.utils.InsetUtils; |
| |
| import com.google.android.collect.Sets; |
| |
| import java.io.PrintWriter; |
| import java.util.Set; |
| |
| /** |
| * When an app token becomes invisible, we take a snapshot (bitmap) of the corresponding task and |
| * put it into our cache. Internally we use gralloc buffers to be able to draw them wherever we |
| * like without any copying. |
| * <p> |
| * System applications may retrieve a snapshot to represent the current state of a task, and draw |
| * them in their own process. |
| * <p> |
| * When we task becomes visible again, we show a starting window with the snapshot as the content to |
| * make app transitions more responsive. |
| * <p> |
| * To access this class, acquire the global window manager lock. |
| */ |
| class TaskSnapshotController { |
| private static final String TAG = TAG_WITH_CLASS_NAME ? "TaskSnapshotController" : TAG_WM; |
| |
| /** |
| * Return value for {@link #getSnapshotMode}: We are allowed to take a real screenshot to be |
| * used as the snapshot. |
| */ |
| @VisibleForTesting |
| static final int SNAPSHOT_MODE_REAL = 0; |
| |
| /** |
| * Return value for {@link #getSnapshotMode}: We are not allowed to take a real screenshot but |
| * we should try to use the app theme to create a fake representation of the app. |
| */ |
| @VisibleForTesting |
| static final int SNAPSHOT_MODE_APP_THEME = 1; |
| |
| /** |
| * Return value for {@link #getSnapshotMode}: We aren't allowed to take any snapshot. |
| */ |
| @VisibleForTesting |
| static final int SNAPSHOT_MODE_NONE = 2; |
| |
| private final WindowManagerService mService; |
| |
| private final TaskSnapshotCache mCache; |
| private final TaskSnapshotPersister mPersister; |
| private final TaskSnapshotLoader mLoader; |
| private final ArraySet<Task> mSkipClosingAppSnapshotTasks = new ArraySet<>(); |
| private final ArraySet<Task> mTmpTasks = new ArraySet<>(); |
| private final Handler mHandler = new Handler(); |
| private final float mHighResTaskSnapshotScale; |
| |
| private final Rect mTmpRect = new Rect(); |
| |
| /** |
| * Flag indicating whether we are running on an Android TV device. |
| */ |
| private final boolean mIsRunningOnTv; |
| |
| /** |
| * Flag indicating whether we are running on an IoT device. |
| */ |
| private final boolean mIsRunningOnIoT; |
| |
| /** |
| * Flag indicating if task snapshot is enabled on this device. |
| */ |
| private boolean mTaskSnapshotEnabled; |
| |
| TaskSnapshotController(WindowManagerService service) { |
| mService = service; |
| mPersister = new TaskSnapshotPersister(mService, Environment::getDataSystemCeDirectory); |
| mLoader = new TaskSnapshotLoader(mPersister); |
| mCache = new TaskSnapshotCache(mService, mLoader); |
| mIsRunningOnTv = mService.mContext.getPackageManager().hasSystemFeature( |
| PackageManager.FEATURE_LEANBACK); |
| mIsRunningOnIoT = mService.mContext.getPackageManager().hasSystemFeature( |
| PackageManager.FEATURE_EMBEDDED); |
| mHighResTaskSnapshotScale = mService.mContext.getResources().getFloat( |
| com.android.internal.R.dimen.config_highResTaskSnapshotScale); |
| mTaskSnapshotEnabled = |
| !mService.mContext |
| .getResources() |
| .getBoolean(com.android.internal.R.bool.config_disableTaskSnapshots); |
| } |
| |
| void systemReady() { |
| mPersister.start(); |
| } |
| |
| void onTransitionStarting(DisplayContent displayContent) { |
| handleClosingApps(displayContent.mClosingApps); |
| } |
| |
| /** |
| * Called when the visibility of an app changes outside of the regular app transition flow. |
| */ |
| void notifyAppVisibilityChanged(ActivityRecord appWindowToken, boolean visible) { |
| if (!visible) { |
| handleClosingApps(Sets.newArraySet(appWindowToken)); |
| } |
| } |
| |
| private void handleClosingApps(ArraySet<ActivityRecord> closingApps) { |
| if (shouldDisableSnapshots()) { |
| return; |
| } |
| // We need to take a snapshot of the task if and only if all activities of the task are |
| // either closing or hidden. |
| getClosingTasks(closingApps, mTmpTasks); |
| snapshotTasks(mTmpTasks); |
| mSkipClosingAppSnapshotTasks.clear(); |
| } |
| |
| /** |
| * Adds the given {@param tasks} to the list of tasks which should not have their snapshots |
| * taken upon the next processing of the set of closing apps. The caller is responsible for |
| * calling {@link #snapshotTasks} to ensure that the task has an up-to-date snapshot. |
| */ |
| @VisibleForTesting |
| void addSkipClosingAppSnapshotTasks(Set<Task> tasks) { |
| if (shouldDisableSnapshots()) { |
| return; |
| } |
| mSkipClosingAppSnapshotTasks.addAll(tasks); |
| } |
| |
| void snapshotTasks(ArraySet<Task> tasks) { |
| snapshotTasks(tasks, false /* allowSnapshotHome */); |
| } |
| |
| /** |
| * This is different than {@link #recordTaskSnapshot(Task, boolean)} because it doesn't store |
| * the snapshot to the cache and returns the TaskSnapshot immediately. |
| * |
| * This is only used for testing so the snapshot content can be verified. |
| */ |
| @VisibleForTesting |
| TaskSnapshot captureTaskSnapshot(Task task, boolean snapshotHome) { |
| final TaskSnapshot snapshot; |
| if (snapshotHome) { |
| snapshot = snapshotTask(task); |
| } else { |
| switch (getSnapshotMode(task)) { |
| case SNAPSHOT_MODE_NONE: |
| return null; |
| case SNAPSHOT_MODE_APP_THEME: |
| snapshot = drawAppThemeSnapshot(task); |
| break; |
| case SNAPSHOT_MODE_REAL: |
| snapshot = snapshotTask(task); |
| break; |
| default: |
| snapshot = null; |
| break; |
| } |
| } |
| return snapshot; |
| } |
| |
| void recordTaskSnapshot(Task task, boolean allowSnapshotHome) { |
| final boolean snapshotHome = allowSnapshotHome && task.isActivityTypeHome(); |
| final TaskSnapshot snapshot = captureTaskSnapshot(task, snapshotHome); |
| if (snapshot == null) { |
| return; |
| } |
| |
| final HardwareBuffer buffer = snapshot.getHardwareBuffer(); |
| if (buffer.getWidth() == 0 || buffer.getHeight() == 0) { |
| buffer.close(); |
| Slog.e(TAG, "Invalid task snapshot dimensions " + buffer.getWidth() + "x" |
| + buffer.getHeight()); |
| } else { |
| mCache.putSnapshot(task, snapshot); |
| // Don't persist or notify the change for the temporal snapshot. |
| if (!snapshotHome) { |
| mPersister.persistSnapshot(task.mTaskId, task.mUserId, snapshot); |
| task.onSnapshotChanged(snapshot); |
| } |
| } |
| } |
| |
| private void snapshotTasks(ArraySet<Task> tasks, boolean allowSnapshotHome) { |
| for (int i = tasks.size() - 1; i >= 0; i--) { |
| recordTaskSnapshot(tasks.valueAt(i), allowSnapshotHome); |
| } |
| } |
| |
| /** |
| * Retrieves a snapshot. If {@param restoreFromDisk} equals {@code true}, DO NOT HOLD THE WINDOW |
| * MANAGER LOCK WHEN CALLING THIS METHOD! |
| */ |
| @Nullable |
| TaskSnapshot getSnapshot(int taskId, int userId, boolean restoreFromDisk, |
| boolean isLowResolution) { |
| return mCache.getSnapshot(taskId, userId, restoreFromDisk, isLowResolution |
| && mPersister.enableLowResSnapshots()); |
| } |
| |
| /** |
| * @see WindowManagerInternal#clearSnapshotCache |
| */ |
| public void clearSnapshotCache() { |
| mCache.clearRunningCache(); |
| } |
| |
| /** |
| * Find the window for a given task to take a snapshot. Top child of the task is usually the one |
| * we're looking for, but during app transitions, trampoline activities can appear in the |
| * children, which should be ignored. |
| */ |
| @Nullable private ActivityRecord findAppTokenForSnapshot(Task task) { |
| return task.getActivity((r) -> { |
| if (r == null || !r.isSurfaceShowing() || r.findMainWindow() == null) { |
| return false; |
| } |
| return r.forAllWindows( |
| // Ensure at least one window for the top app is visible before attempting to |
| // take a screenshot. Visible here means that the WSA surface is shown and has |
| // an alpha greater than 0. |
| ws -> ws.mWinAnimator != null && ws.mWinAnimator.getShown() |
| && ws.mWinAnimator.mLastAlpha > 0f, true /* traverseTopToBottom */); |
| |
| }); |
| } |
| |
| /** |
| * Validates the state of the Task is appropriate to capture a snapshot, collects |
| * information from the task and populates the builder. |
| * |
| * @param task the task to capture |
| * @param pixelFormat the desired pixel format, or {@link PixelFormat#UNKNOWN} to |
| * automatically select |
| * @param builder the snapshot builder to populate |
| * |
| * @return true if the state of the task is ok to proceed |
| */ |
| @VisibleForTesting |
| boolean prepareTaskSnapshot(Task task, int pixelFormat, TaskSnapshot.Builder builder) { |
| final Pair<ActivityRecord, WindowState> result = checkIfReadyToSnapshot(task); |
| if (result == null) { |
| return false; |
| } |
| final ActivityRecord activity = result.first; |
| final WindowState mainWindow = result.second; |
| final Rect contentInsets = getSystemBarInsets(mainWindow.getFrame(), |
| mainWindow.getInsetsStateWithVisibilityOverride()); |
| final Rect letterboxInsets = activity.getLetterboxInsets(); |
| InsetUtils.addInsets(contentInsets, letterboxInsets); |
| |
| builder.setIsRealSnapshot(true); |
| builder.setId(System.currentTimeMillis()); |
| builder.setContentInsets(contentInsets); |
| builder.setLetterboxInsets(letterboxInsets); |
| |
| final boolean isWindowTranslucent = mainWindow.getAttrs().format != PixelFormat.OPAQUE; |
| final boolean isShowWallpaper = mainWindow.hasWallpaper(); |
| |
| if (pixelFormat == PixelFormat.UNKNOWN) { |
| pixelFormat = mPersister.use16BitFormat() && activity.fillsParent() |
| && !(isWindowTranslucent && isShowWallpaper) |
| ? PixelFormat.RGB_565 |
| : PixelFormat.RGBA_8888; |
| } |
| |
| final boolean isTranslucent = PixelFormat.formatHasAlpha(pixelFormat) |
| && (!activity.fillsParent() || isWindowTranslucent); |
| |
| builder.setTopActivityComponent(activity.mActivityComponent); |
| builder.setPixelFormat(pixelFormat); |
| builder.setIsTranslucent(isTranslucent); |
| builder.setOrientation(activity.getTask().getConfiguration().orientation); |
| builder.setRotation(activity.getTask().getDisplayContent().getRotation()); |
| builder.setWindowingMode(task.getWindowingMode()); |
| builder.setAppearance(getAppearance(task)); |
| return true; |
| } |
| |
| /** |
| * Check if the state of the Task is appropriate to capture a snapshot, such like the task |
| * snapshot or the associated IME surface snapshot. |
| * |
| * @param task the target task to capture the snapshot |
| * @return Pair of (the top activity of the task, the main window of the task) if passed the |
| * state checking. Returns {@code null} if the task state isn't ready to snapshot. |
| */ |
| Pair<ActivityRecord, WindowState> checkIfReadyToSnapshot(Task task) { |
| if (!mService.mPolicy.isScreenOn()) { |
| if (DEBUG_SCREENSHOT) { |
| Slog.i(TAG_WM, "Attempted to take screenshot while display was off."); |
| } |
| return null; |
| } |
| final ActivityRecord activity = findAppTokenForSnapshot(task); |
| if (activity == null) { |
| if (DEBUG_SCREENSHOT) { |
| Slog.w(TAG_WM, "Failed to take screenshot. No visible windows for " + task); |
| } |
| return null; |
| } |
| if (activity.hasCommittedReparentToAnimationLeash()) { |
| if (DEBUG_SCREENSHOT) { |
| Slog.w(TAG_WM, "Failed to take screenshot. App is animating " + activity); |
| } |
| return null; |
| } |
| |
| final WindowState mainWindow = activity.findMainWindow(); |
| if (mainWindow == null) { |
| Slog.w(TAG_WM, "Failed to take screenshot. No main window for " + task); |
| return null; |
| } |
| if (activity.hasFixedRotationTransform()) { |
| if (DEBUG_SCREENSHOT) { |
| Slog.i(TAG_WM, "Skip taking screenshot. App has fixed rotation " + activity); |
| } |
| // The activity is in a temporal state that it has different rotation than the task. |
| return null; |
| } |
| return new Pair<>(activity, mainWindow); |
| } |
| |
| @Nullable |
| SurfaceControl.ScreenshotHardwareBuffer createTaskSnapshot(@NonNull Task task, |
| TaskSnapshot.Builder builder) { |
| Point taskSize = new Point(); |
| final SurfaceControl.ScreenshotHardwareBuffer taskSnapshot = createTaskSnapshot(task, |
| mHighResTaskSnapshotScale, builder.getPixelFormat(), taskSize, builder); |
| builder.setTaskSize(taskSize); |
| return taskSnapshot; |
| } |
| |
| @Nullable |
| private SurfaceControl.ScreenshotHardwareBuffer createImeSnapshot(@NonNull Task task, |
| int pixelFormat) { |
| if (task.getSurfaceControl() == null) { |
| if (DEBUG_SCREENSHOT) { |
| Slog.w(TAG_WM, "Failed to take screenshot. No surface control for " + task); |
| } |
| return null; |
| } |
| final WindowState imeWindow = task.getDisplayContent().mInputMethodWindow; |
| SurfaceControl.ScreenshotHardwareBuffer imeBuffer = null; |
| if (imeWindow != null && imeWindow.isWinVisibleLw()) { |
| final Rect bounds = imeWindow.getParentFrame(); |
| bounds.offsetTo(0, 0); |
| imeBuffer = SurfaceControl.captureLayersExcluding(imeWindow.getSurfaceControl(), |
| bounds, 1.0f, pixelFormat, null); |
| } |
| return imeBuffer; |
| } |
| |
| /** |
| * Create the snapshot of the IME surface on the task which used for placing on the closing |
| * task to keep IME visibility while app transitioning. |
| */ |
| @Nullable |
| SurfaceControl.ScreenshotHardwareBuffer snapshotImeFromAttachedTask(@NonNull Task task) { |
| // Check if the IME targets task ready to take the corresponding IME snapshot, if not, |
| // means the task is not yet visible for some reasons and no need to snapshot IME surface. |
| if (checkIfReadyToSnapshot(task) == null) { |
| return null; |
| } |
| final int pixelFormat = mPersister.use16BitFormat() |
| ? PixelFormat.RGB_565 |
| : PixelFormat.RGBA_8888; |
| return createImeSnapshot(task, pixelFormat); |
| } |
| |
| @Nullable |
| SurfaceControl.ScreenshotHardwareBuffer createTaskSnapshot(@NonNull Task task, |
| float scaleFraction, int pixelFormat, Point outTaskSize, TaskSnapshot.Builder builder) { |
| if (task.getSurfaceControl() == null) { |
| if (DEBUG_SCREENSHOT) { |
| Slog.w(TAG_WM, "Failed to take screenshot. No surface control for " + task); |
| } |
| return null; |
| } |
| task.getBounds(mTmpRect); |
| mTmpRect.offsetTo(0, 0); |
| |
| SurfaceControl[] excludeLayers; |
| final WindowState imeWindow = task.getDisplayContent().mInputMethodWindow; |
| // Exclude IME window snapshot when IME isn't proper to attach to app. |
| final boolean excludeIme = imeWindow != null && imeWindow.getSurfaceControl() != null |
| && !task.getDisplayContent().shouldImeAttachedToApp(); |
| final WindowState navWindow = |
| task.getDisplayContent().getDisplayPolicy().getNavigationBar(); |
| // If config_attachNavBarToAppDuringTransition is true, the nav bar will be reparent to the |
| // the swiped app when entering recent app, therefore the task will contain the navigation |
| // bar and we should exclude it from snapshot. |
| final boolean excludeNavBar = navWindow != null; |
| if (excludeIme && excludeNavBar) { |
| excludeLayers = new SurfaceControl[2]; |
| excludeLayers[0] = imeWindow.getSurfaceControl(); |
| excludeLayers[1] = navWindow.getSurfaceControl(); |
| } else if (excludeIme || excludeNavBar) { |
| excludeLayers = new SurfaceControl[1]; |
| excludeLayers[0] = |
| excludeIme ? imeWindow.getSurfaceControl() : navWindow.getSurfaceControl(); |
| } else { |
| excludeLayers = new SurfaceControl[0]; |
| } |
| builder.setHasImeSurface(!excludeIme && imeWindow != null && imeWindow.isVisible()); |
| |
| final SurfaceControl.ScreenshotHardwareBuffer screenshotBuffer = |
| SurfaceControl.captureLayersExcluding( |
| task.getSurfaceControl(), mTmpRect, scaleFraction, |
| pixelFormat, excludeLayers); |
| if (outTaskSize != null) { |
| outTaskSize.x = mTmpRect.width(); |
| outTaskSize.y = mTmpRect.height(); |
| } |
| final HardwareBuffer buffer = screenshotBuffer == null ? null |
| : screenshotBuffer.getHardwareBuffer(); |
| if (isInvalidHardwareBuffer(buffer)) { |
| return null; |
| } |
| return screenshotBuffer; |
| } |
| |
| static boolean isInvalidHardwareBuffer(HardwareBuffer buffer) { |
| return buffer == null || buffer.isClosed() // This must be checked before getting size. |
| || buffer.getWidth() <= 1 || buffer.getHeight() <= 1; |
| } |
| |
| @Nullable |
| TaskSnapshot snapshotTask(Task task) { |
| return snapshotTask(task, PixelFormat.UNKNOWN); |
| } |
| |
| @Nullable |
| TaskSnapshot snapshotTask(Task task, int pixelFormat) { |
| TaskSnapshot.Builder builder = new TaskSnapshot.Builder(); |
| |
| if (!prepareTaskSnapshot(task, pixelFormat, builder)) { |
| // Failed some pre-req. Has been logged. |
| return null; |
| } |
| |
| final SurfaceControl.ScreenshotHardwareBuffer screenshotBuffer = |
| createTaskSnapshot(task, builder); |
| |
| if (screenshotBuffer == null) { |
| // Failed to acquire image. Has been logged. |
| return null; |
| } |
| builder.setSnapshot(screenshotBuffer.getHardwareBuffer()); |
| builder.setColorSpace(screenshotBuffer.getColorSpace()); |
| return builder.build(); |
| } |
| |
| void setTaskSnapshotEnabled(boolean enabled) { |
| mTaskSnapshotEnabled = enabled; |
| } |
| |
| boolean shouldDisableSnapshots() { |
| return mIsRunningOnTv || mIsRunningOnIoT || !mTaskSnapshotEnabled; |
| } |
| |
| /** |
| * Retrieves all closing tasks based on the list of closing apps during an app transition. |
| */ |
| @VisibleForTesting |
| void getClosingTasks(ArraySet<ActivityRecord> closingApps, ArraySet<Task> outClosingTasks) { |
| outClosingTasks.clear(); |
| for (int i = closingApps.size() - 1; i >= 0; i--) { |
| final ActivityRecord activity = closingApps.valueAt(i); |
| final Task task = activity.getTask(); |
| if (task == null) continue; |
| |
| // Since RecentsAnimation will handle task snapshot while switching apps with the |
| // best capture timing (e.g. IME window capture), |
| // No need additional task capture while task is controlled by RecentsAnimation. |
| if (isAnimatingByRecents(task)) { |
| mSkipClosingAppSnapshotTasks.add(task); |
| } |
| // If the task of the app is not visible anymore, it means no other app in that task |
| // is opening. Thus, the task is closing. |
| if (!task.isVisible() && !mSkipClosingAppSnapshotTasks.contains(task)) { |
| outClosingTasks.add(task); |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| int getSnapshotMode(Task task) { |
| final ActivityRecord topChild = task.getTopMostActivity(); |
| if (!task.isActivityTypeStandardOrUndefined() && !task.isActivityTypeAssistant()) { |
| return SNAPSHOT_MODE_NONE; |
| } else if (topChild != null && topChild.shouldUseAppThemeSnapshot()) { |
| return SNAPSHOT_MODE_APP_THEME; |
| } else { |
| return SNAPSHOT_MODE_REAL; |
| } |
| } |
| |
| /** |
| * If we are not allowed to take a real screenshot, this attempts to represent the app as best |
| * as possible by using the theme's window background. |
| */ |
| private TaskSnapshot drawAppThemeSnapshot(Task task) { |
| final ActivityRecord topChild = task.getTopMostActivity(); |
| if (topChild == null) { |
| return null; |
| } |
| final WindowState mainWindow = topChild.findMainWindow(); |
| if (mainWindow == null) { |
| return null; |
| } |
| final int color = ColorUtils.setAlphaComponent( |
| task.getTaskDescription().getBackgroundColor(), 255); |
| final LayoutParams attrs = mainWindow.getAttrs(); |
| final Rect taskBounds = task.getBounds(); |
| final InsetsState insetsState = mainWindow.getInsetsStateWithVisibilityOverride(); |
| final Rect systemBarInsets = getSystemBarInsets(mainWindow.getFrame(), insetsState); |
| final SystemBarBackgroundPainter decorPainter = new SystemBarBackgroundPainter(attrs.flags, |
| attrs.privateFlags, attrs.insetsFlags.appearance, task.getTaskDescription(), |
| mHighResTaskSnapshotScale, insetsState); |
| final int taskWidth = taskBounds.width(); |
| final int taskHeight = taskBounds.height(); |
| final int width = (int) (taskWidth * mHighResTaskSnapshotScale); |
| final int height = (int) (taskHeight * mHighResTaskSnapshotScale); |
| |
| final RenderNode node = RenderNode.create("TaskSnapshotController", null); |
| node.setLeftTopRightBottom(0, 0, width, height); |
| node.setClipToBounds(false); |
| final RecordingCanvas c = node.start(width, height); |
| c.drawColor(color); |
| decorPainter.setInsets(systemBarInsets); |
| decorPainter.drawDecors(c /* statusBarExcludeFrame */); |
| node.end(c); |
| final Bitmap hwBitmap = ThreadedRenderer.createHardwareBitmap(node, width, height); |
| if (hwBitmap == null) { |
| return null; |
| } |
| final Rect contentInsets = new Rect(systemBarInsets); |
| final Rect letterboxInsets = topChild.getLetterboxInsets(); |
| InsetUtils.addInsets(contentInsets, letterboxInsets); |
| |
| // Note, the app theme snapshot is never translucent because we enforce a non-translucent |
| // color above |
| return new TaskSnapshot( |
| System.currentTimeMillis() /* id */, |
| topChild.mActivityComponent, hwBitmap.getHardwareBuffer(), |
| hwBitmap.getColorSpace(), mainWindow.getConfiguration().orientation, |
| mainWindow.getWindowConfiguration().getRotation(), new Point(taskWidth, taskHeight), |
| contentInsets, letterboxInsets, false /* isLowResolution */, |
| false /* isRealSnapshot */, task.getWindowingMode(), |
| getAppearance(task), false /* isTranslucent */, false /* hasImeSurface */); |
| } |
| |
| /** |
| * Called when an {@link ActivityRecord} has been removed. |
| */ |
| void onAppRemoved(ActivityRecord activity) { |
| mCache.onAppRemoved(activity); |
| } |
| |
| /** |
| * Called when the process of an {@link ActivityRecord} has died. |
| */ |
| void onAppDied(ActivityRecord activity) { |
| mCache.onAppDied(activity); |
| } |
| |
| void notifyTaskRemovedFromRecents(int taskId, int userId) { |
| mCache.onTaskRemoved(taskId); |
| mPersister.onTaskRemovedFromRecents(taskId, userId); |
| } |
| |
| void removeSnapshotCache(int taskId) { |
| mCache.removeRunningEntry(taskId); |
| } |
| |
| /** |
| * See {@link TaskSnapshotPersister#removeObsoleteFiles} |
| */ |
| void removeObsoleteTaskFiles(ArraySet<Integer> persistentTaskIds, int[] runningUserIds) { |
| mPersister.removeObsoleteFiles(persistentTaskIds, runningUserIds); |
| } |
| |
| /** |
| * Temporarily pauses/unpauses persisting of task snapshots. |
| * |
| * @param paused Whether task snapshot persisting should be paused. |
| */ |
| void setPersisterPaused(boolean paused) { |
| mPersister.setPaused(paused); |
| } |
| |
| /** |
| * Called when screen is being turned off. |
| */ |
| void screenTurningOff(int displayId, ScreenOffListener listener) { |
| if (shouldDisableSnapshots()) { |
| listener.onScreenOff(); |
| return; |
| } |
| |
| // We can't take a snapshot when screen is off, so take a snapshot now! |
| mHandler.post(() -> { |
| try { |
| synchronized (mService.mGlobalLock) { |
| snapshotForSleeping(displayId); |
| } |
| } finally { |
| listener.onScreenOff(); |
| } |
| }); |
| } |
| |
| /** Called when the device is going to sleep (e.g. screen off, AOD without screen off). */ |
| void snapshotForSleeping(int displayId) { |
| if (shouldDisableSnapshots() || !mService.mDisplayEnabled) { |
| return; |
| } |
| final DisplayContent displayContent = mService.mRoot.getDisplayContent(displayId); |
| if (displayContent == null) { |
| return; |
| } |
| mTmpTasks.clear(); |
| displayContent.forAllTasks(task -> { |
| // Since RecentsAnimation will handle task snapshot while switching apps with the best |
| // capture timing (e.g. IME window capture), No need additional task capture while task |
| // is controlled by RecentsAnimation. |
| if (task.isVisible() && !isAnimatingByRecents(task)) { |
| mTmpTasks.add(task); |
| } |
| }); |
| // Allow taking snapshot of home when turning screen off to reduce the delay of waking from |
| // secure lock to home. |
| final boolean allowSnapshotHome = displayId == Display.DEFAULT_DISPLAY |
| && mService.mPolicy.isKeyguardSecure(mService.mCurrentUserId); |
| snapshotTasks(mTmpTasks, allowSnapshotHome); |
| } |
| |
| /** |
| * @return The {@link Appearance} flags for the top fullscreen opaque window in the given |
| * {@param task}. |
| */ |
| private @Appearance int getAppearance(Task task) { |
| final ActivityRecord topFullscreenActivity = task.getTopFullscreenActivity(); |
| final WindowState topFullscreenOpaqueWindow = topFullscreenActivity != null |
| ? topFullscreenActivity.getTopFullscreenOpaqueWindow() |
| : null; |
| if (topFullscreenOpaqueWindow != null) { |
| return topFullscreenOpaqueWindow.mAttrs.insetsFlags.appearance; |
| } |
| return 0; |
| } |
| |
| static Rect getSystemBarInsets(Rect frame, InsetsState state) { |
| return state.calculateInsets( |
| frame, Type.systemBars(), false /* ignoreVisibility */).toRect(); |
| } |
| |
| private boolean isAnimatingByRecents(@NonNull Task task) { |
| return task.isAnimatingByRecents() |
| || mService.mAtmService.getTransitionController().inRecentsTransition(task); |
| } |
| |
| void dump(PrintWriter pw, String prefix) { |
| pw.println(prefix + "mHighResTaskSnapshotScale=" + mHighResTaskSnapshotScale); |
| pw.println(prefix + "mTaskSnapshotEnabled=" + mTaskSnapshotEnabled); |
| mCache.dump(pw, prefix); |
| } |
| |
| /** |
| * Helper class to draw the background of the system bars in regions the task snapshot isn't |
| * filling the window. |
| */ |
| static class SystemBarBackgroundPainter { |
| |
| private final Paint mStatusBarPaint = new Paint(); |
| private final Paint mNavigationBarPaint = new Paint(); |
| private final int mStatusBarColor; |
| private final int mNavigationBarColor; |
| private final int mWindowFlags; |
| private final int mWindowPrivateFlags; |
| private final float mScale; |
| private final InsetsState mInsetsState; |
| private final Rect mSystemBarInsets = new Rect(); |
| |
| SystemBarBackgroundPainter(int windowFlags, int windowPrivateFlags, int appearance, |
| ActivityManager.TaskDescription taskDescription, float scale, |
| InsetsState insetsState) { |
| mWindowFlags = windowFlags; |
| mWindowPrivateFlags = windowPrivateFlags; |
| mScale = scale; |
| final Context context = ActivityThread.currentActivityThread().getSystemUiContext(); |
| final int semiTransparent = context.getColor( |
| R.color.system_bar_background_semi_transparent); |
| mStatusBarColor = DecorView.calculateBarColor(windowFlags, FLAG_TRANSLUCENT_STATUS, |
| semiTransparent, taskDescription.getStatusBarColor(), appearance, |
| APPEARANCE_LIGHT_STATUS_BARS, |
| taskDescription.getEnsureStatusBarContrastWhenTransparent()); |
| mNavigationBarColor = DecorView.calculateBarColor(windowFlags, |
| FLAG_TRANSLUCENT_NAVIGATION, semiTransparent, |
| taskDescription.getNavigationBarColor(), appearance, |
| APPEARANCE_LIGHT_NAVIGATION_BARS, |
| taskDescription.getEnsureNavigationBarContrastWhenTransparent() |
| && context.getResources().getBoolean(R.bool.config_navBarNeedsScrim)); |
| mStatusBarPaint.setColor(mStatusBarColor); |
| mNavigationBarPaint.setColor(mNavigationBarColor); |
| mInsetsState = insetsState; |
| } |
| |
| void setInsets(Rect systemBarInsets) { |
| mSystemBarInsets.set(systemBarInsets); |
| } |
| |
| int getStatusBarColorViewHeight() { |
| final boolean forceBarBackground = |
| (mWindowPrivateFlags & PRIVATE_FLAG_FORCE_DRAW_BAR_BACKGROUNDS) != 0; |
| if (STATUS_BAR_COLOR_VIEW_ATTRIBUTES.isVisible( |
| mInsetsState, mStatusBarColor, mWindowFlags, forceBarBackground)) { |
| return (int) (mSystemBarInsets.top * mScale); |
| } else { |
| return 0; |
| } |
| } |
| |
| private boolean isNavigationBarColorViewVisible() { |
| final boolean forceBarBackground = |
| (mWindowPrivateFlags & PRIVATE_FLAG_FORCE_DRAW_BAR_BACKGROUNDS) != 0; |
| return NAVIGATION_BAR_COLOR_VIEW_ATTRIBUTES.isVisible( |
| mInsetsState, mNavigationBarColor, mWindowFlags, forceBarBackground); |
| } |
| |
| void drawDecors(Canvas c) { |
| drawStatusBarBackground(c, getStatusBarColorViewHeight()); |
| drawNavigationBarBackground(c); |
| } |
| |
| @VisibleForTesting |
| void drawStatusBarBackground(Canvas c, |
| int statusBarHeight) { |
| if (statusBarHeight > 0 && Color.alpha(mStatusBarColor) != 0) { |
| final int rightInset = (int) (mSystemBarInsets.right * mScale); |
| c.drawRect(0, 0, c.getWidth() - rightInset, statusBarHeight, mStatusBarPaint); |
| } |
| } |
| |
| @VisibleForTesting |
| void drawNavigationBarBackground(Canvas c) { |
| final Rect navigationBarRect = new Rect(); |
| getNavigationBarRect(c.getWidth(), c.getHeight(), mSystemBarInsets, navigationBarRect, |
| mScale); |
| final boolean visible = isNavigationBarColorViewVisible(); |
| if (visible && Color.alpha(mNavigationBarColor) != 0 && !navigationBarRect.isEmpty()) { |
| c.drawRect(navigationBarRect, mNavigationBarPaint); |
| } |
| } |
| } |
| } |
