Initial implementation of snapshots
All this functionality is hidden behind a flag. If this flag is
active, we disable the regular screenshots.
Instead, we take a screenshot when an app transition for which a
task is disappearing is starting. The screenshot gets stored
into a gralloc buffer. SystemUI uses a new method to retrieve
a snapshot gralloc buffer and then draws it using GraphicBuffer.
createHardwareBitmap().
When starting an existing activity in an existing tasks, or when
bringing an existing tasks to front from recents, we add a new
snapshot starting window. For that, we reuse the existing
starting window, but when creating the window, we use a fake
window that draws the contents of the starting window.
Test: runtest frameworks-services -c
com.android.server.wm.TaskSnapshotControllerTest
Bug: 31339431
Change-Id: If72df07b3e56f30413db5029d0887b8c9665aaf4
diff --git a/services/core/java/com/android/server/wm/AppWindowToken.java b/services/core/java/com/android/server/wm/AppWindowToken.java
index f4fa220..10d1d8b 100644
--- a/services/core/java/com/android/server/wm/AppWindowToken.java
+++ b/services/core/java/com/android/server/wm/AppWindowToken.java
@@ -205,7 +205,7 @@
// We now have a good window to show, remove dead placeholders
removeDeadWindows();
- if (startingData != null) {
+ if (startingWindow != null) {
if (DEBUG_STARTING_WINDOW || DEBUG_ANIM) Slog.v(TAG, "Finish starting "
+ win.mToken + ": first real window is shown, no animation");
// If this initial window is animating, stop it -- we will do an animation to reveal
@@ -671,7 +671,7 @@
} else if (mChildren.size() == 0 && startingData != null) {
// If this is the last window and we had requested a starting transition window,
// well there is no point now.
- if (DEBUG_STARTING_WINDOW) Slog.v(TAG_WM, "Nulling last startingWindow");
+ if (DEBUG_STARTING_WINDOW) Slog.v(TAG_WM, "Nulling last startingData");
startingData = null;
} else if (mChildren.size() == 1 && startingSurface != null) {
// If this is the last window except for a starting transition window,