Flag window animation transactions as animations.

This change makes WindowManager use the new eAnimation flag when animating
windows.  This prevents some of the window updates from being combined with
updates from prior animation frames.

Bug: 7353840
Change-Id: I5a9f8fa2c1a2f5f08363a45cd9f28bb97cd77080

Author: Jamie Gennis

core/java/android/view/Surface.java

@@ -245,6 +245,7 @@ private static native Bitmap nativeScreenshot(IBinder displayToken,
 
     private static native void nativeOpenTransaction();
     private static native void nativeCloseTransaction();
+    private static native void nativeSetAnimationTransaction();
 
     private native void nativeSetLayer(int zorder);
     private native void nativeSetPosition(float x, float y);
@@ -525,6 +526,11 @@ public static void closeTransaction() {
         nativeCloseTransaction();
     }
 
+    /** flag the transaction as an animation @hide */
+    public static void setAnimationTransaction() {
+        nativeSetAnimationTransaction();
+    }
+
     /** @hide */
     public void setLayer(int zorder) {
         nativeSetLayer(zorder);

core/jni/android_view_Surface.cpp

@@ -526,6 +526,10 @@ static void nativeCloseTransaction(JNIEnv* env, jclass clazz) {
     SurfaceComposerClient::closeGlobalTransaction();
 }
 
+static void nativeSetAnimationTransaction(JNIEnv* env, jclass clazz) {
+    SurfaceComposerClient::setAnimationTransaction();
+}
+
 static void nativeSetLayer(JNIEnv* env, jobject surfaceObj, jint zorder) {
     sp<SurfaceControl> surface(getSurfaceControl(env, surfaceObj));
     if (surface == NULL) return;
@@ -819,6 +823,8 @@ static JNINativeMethod gSurfaceMethods[] = {
             (void*)nativeOpenTransaction },
     {"nativeCloseTransaction", "()V",
             (void*)nativeCloseTransaction },
+    {"nativeSetAnimationTransaction", "()V",
+            (void*)nativeSetAnimationTransaction },
     {"nativeSetLayer", "(I)V",
             (void*)nativeSetLayer },
     {"nativeSetPosition", "(FF)V",

services/java/com/android/server/wm/WindowAnimator.java

@@ -618,6 +618,7 @@ private void animateLocked() {
         if (WindowManagerService.SHOW_TRANSACTIONS) Slog.i(
                 TAG, ">>> OPEN TRANSACTION animateLocked");
         Surface.openTransaction();
+        Surface.setAnimationTransaction();
         try {
             updateAppWindowsLocked();