Switch BLAST flag to WindowManagerGlobal

Setup for P/H experiment by switching to WindowManagerGlobal.
Follow up patch will set the flag based on DeviceConfig

Bug: 147096935
Test: build, boot, manual
Change-Id: If062fc16a90e0f3069064b969e1a63a6142421df

3 files changed, 13 insertions, 12 deletions

diff --git a/core/java/android/view/SurfaceView.java b/core/java/android/view/SurfaceView.java
index 52ea2b2142ad..17825444a524 100644
--- a/core/java/android/view/SurfaceView.java
+++ b/core/java/android/view/SurfaceView.java
@@ -379,7 +379,7 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
                  * This gets called on a RenderThread worker thread, so members accessed here must
                  * be protected by a lock.
                  */
-                final boolean useBLAST = ViewRootImpl.USE_BLAST_BUFFERQUEUE;
+                final boolean useBLAST = WindowManagerGlobal.USE_BLAST_ADAPTER;
                 viewRoot.registerRtFrameCallback(frame -> {
                     try {
                         final SurfaceControl.Transaction t = useBLAST ?
@@ -1107,7 +1107,7 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
 
     private void applySurfaceTransforms(SurfaceControl surface, SurfaceControl.Transaction t,
             Rect position, long frameNumber) {
-        if (frameNumber > 0 && ViewRootImpl.USE_BLAST_BUFFERQUEUE == false) {
+        if (frameNumber > 0 && !WindowManagerGlobal.USE_BLAST_ADAPTER) {
             final ViewRootImpl viewRoot = getViewRootImpl();
 
             t.deferTransactionUntilSurface(surface, viewRoot.mSurface,
@@ -1125,7 +1125,7 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
     }
 
     private void setParentSpaceRectangle(Rect position, long frameNumber) {
-        final boolean useBLAST = ViewRootImpl.USE_BLAST_BUFFERQUEUE;
+        final boolean useBLAST = WindowManagerGlobal.USE_BLAST_ADAPTER;
         final ViewRootImpl viewRoot = getViewRootImpl();
         final SurfaceControl.Transaction t = useBLAST ? viewRoot.getBLASTSyncTransaction() :
             mRtTransaction;
@@ -1186,7 +1186,7 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
 
         @Override
         public void positionLost(long frameNumber) {
-            boolean useBLAST = ViewRootImpl.USE_BLAST_BUFFERQUEUE;
+            boolean useBLAST = WindowManagerGlobal.USE_BLAST_ADAPTER;
             if (DEBUG) {
                 Log.d(TAG, String.format("%d windowPositionLost, frameNr = %d",
                         System.identityHashCode(this), frameNumber));
@@ -1524,7 +1524,7 @@ public class SurfaceView extends View implements ViewRootImpl.SurfaceChangedCall
     @Override
     public void invalidate(boolean invalidateCache) {
         super.invalidate(invalidateCache);
-        if (ViewRootImpl.USE_BLAST_BUFFERQUEUE == false) {
+        if (!WindowManagerGlobal.USE_BLAST_ADAPTER) {
             return;
         }
         final ViewRootImpl viewRoot = getViewRootImpl();
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index 522ff9a3bcb5..bf8dc65abe28 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -192,11 +192,6 @@ public final class ViewRootImpl implements ViewParent,
     private static final boolean MT_RENDERER_AVAILABLE = true;
 
     /**
-     * @hide
-     */
-    public static final boolean USE_BLAST_BUFFERQUEUE = false;
-
-    /**
      * If set to 2, the view system will switch from using rectangles retrieved from window to
      * dispatch to the view hierarchy to using {@link InsetsController}, that derives the insets
      * directly from the full configuration, enabling richer information about the insets state, as
@@ -1312,7 +1307,7 @@ public final class ViewRootImpl implements ViewParent,
             }
             mWindowAttributes.privateFlags |= compatibleWindowFlag;
 
-            if (USE_BLAST_BUFFERQUEUE) {
+            if (WindowManagerGlobal.USE_BLAST_ADAPTER) {
                 mWindowAttributes.privateFlags =
                     WindowManager.LayoutParams.PRIVATE_FLAG_USE_BLAST;
             }
@@ -7273,7 +7268,7 @@ public final class ViewRootImpl implements ViewParent,
                 mPendingStableInsets, mPendingBackDropFrame, mPendingDisplayCutout,
                 mPendingMergedConfiguration, mSurfaceControl, mTempInsets);
         if (mSurfaceControl.isValid()) {
-            if (USE_BLAST_BUFFERQUEUE == false) {
+            if (!WindowManagerGlobal.USE_BLAST_ADAPTER) {
                 mSurface.copyFrom(mSurfaceControl);
             } else {
                 mSurface.transferFrom(getOrCreateBLASTSurface(
diff --git a/core/java/android/view/WindowManagerGlobal.java b/core/java/android/view/WindowManagerGlobal.java
index 95780023563d..7d5564e1c8be 100644
--- a/core/java/android/view/WindowManagerGlobal.java
+++ b/core/java/android/view/WindowManagerGlobal.java
@@ -57,6 +57,12 @@ public final class WindowManagerGlobal {
     private static final String TAG = "WindowManager";
 
     /**
+     * This flag controls whether ViewRootImpl will utilize the Blast Adapter
+     * to send buffer updates to SurfaceFlinger
+     */
+    public static final boolean USE_BLAST_ADAPTER = false;
+
+    /**
      * The user is navigating with keys (not the touch screen), so
      * navigational focus should be shown.
      */