Make the wallpaper offset update asynchronous

This change tests the effects of making updateWallpaperOffset asynchronous

Bug: 293248754
Test: WallpaperControllerTests
Change-Id: I5a72a1e9a38a7aa9d636c1f2b3b229b13d046151

4 files changed, 15 insertions, 3 deletions

diff --git a/core/java/android/window/flags/windowing_frontend.aconfig b/core/java/android/window/flags/windowing_frontend.aconfig
index 6c025a47ff5a..73778900399c 100644
--- a/core/java/android/window/flags/windowing_frontend.aconfig
+++ b/core/java/android/window/flags/windowing_frontend.aconfig
@@ -28,3 +28,12 @@ flag {
   description: "Enable accurate transition readiness tracking"
   bug: "294925498"
 }
+
+
+flag {
+    name: "wallpaper_offset_async"
+    namespace: "windowing_frontend"
+    description: "Do not synchronise the wallpaper offset"
+    bug: "293248754"
+    is_fixed_read_only: true
+}
\ No newline at end of file
diff --git a/services/core/java/com/android/server/wm/WallpaperController.java b/services/core/java/com/android/server/wm/WallpaperController.java
index 674ff487800f..94e66ffd8373 100644
--- a/services/core/java/com/android/server/wm/WallpaperController.java
+++ b/services/core/java/com/android/server/wm/WallpaperController.java
@@ -536,7 +536,7 @@ class WallpaperController {
             window.mWallpaperY = y;
             window.mWallpaperXStep = xStep;
             window.mWallpaperYStep = yStep;
-            updateWallpaperOffsetLocked(window, true);
+            updateWallpaperOffsetLocked(window, !mService.mFlags.mWallpaperOffsetAsync);
         }
     }
 
@@ -561,7 +561,7 @@ class WallpaperController {
         if (window.mWallpaperDisplayOffsetX != x || window.mWallpaperDisplayOffsetY != y)  {
             window.mWallpaperDisplayOffsetX = x;
             window.mWallpaperDisplayOffsetY = y;
-            updateWallpaperOffsetLocked(window, true);
+            updateWallpaperOffsetLocked(window, !mService.mFlags.mWallpaperOffsetAsync);
         }
     }
 
diff --git a/services/core/java/com/android/server/wm/WallpaperWindowToken.java b/services/core/java/com/android/server/wm/WallpaperWindowToken.java
index 50ef52a4d9dd..1ed14310a500 100644
--- a/services/core/java/com/android/server/wm/WallpaperWindowToken.java
+++ b/services/core/java/com/android/server/wm/WallpaperWindowToken.java
@@ -117,7 +117,8 @@ class WallpaperWindowToken extends WindowToken {
         final WallpaperController wallpaperController = mDisplayContent.mWallpaperController;
         for (int wallpaperNdx = mChildren.size() - 1; wallpaperNdx >= 0; wallpaperNdx--) {
             final WindowState wallpaper = mChildren.get(wallpaperNdx);
-            if (wallpaperController.updateWallpaperOffset(wallpaper, sync)) {
+            if (wallpaperController.updateWallpaperOffset(wallpaper,
+                    sync && !mWmService.mFlags.mWallpaperOffsetAsync)) {
                 // We only want to be synchronous with one wallpaper.
                 sync = false;
             }
diff --git a/services/core/java/com/android/server/wm/WindowManagerFlags.java b/services/core/java/com/android/server/wm/WindowManagerFlags.java
index 5b9acb2f67c4..46677107c670 100644
--- a/services/core/java/com/android/server/wm/WindowManagerFlags.java
+++ b/services/core/java/com/android/server/wm/WindowManagerFlags.java
@@ -47,5 +47,7 @@ class WindowManagerFlags {
 
     final boolean mWindowStateResizeItemFlag = Flags.windowStateResizeItemFlag();
 
+    final boolean mWallpaperOffsetAsync = Flags.wallpaperOffsetAsync();
+
     /* End Available Flags */
 }