Fix first frame on rotation animation for Tegra

Modify rotation animation to use a screenshot instead of a black screen.

Change-Id: I71563680f5d7cb355dd50b8873fa1b420a131512

1 files changed, 31 insertions, 1 deletions

diff --git a/services/java/com/android/server/wm/ScreenRotationAnimation.java b/services/java/com/android/server/wm/ScreenRotationAnimation.java
index 35503d3..4e4f851 100644
--- a/services/java/com/android/server/wm/ScreenRotationAnimation.java
+++ b/services/java/com/android/server/wm/ScreenRotationAnimation.java
@@ -62,6 +62,7 @@ class ScreenRotationAnimation {
 
     public ScreenRotationAnimation(Context context, SurfaceSession session,
             boolean inTransaction, int originalWidth, int originalHeight, int originalRotation) {
+        boolean isTegra = android.os.SystemProperties.get("ro.board.platform","").equals("tegra");
         mContext = context;
 
         // Screenshot does NOT include rotation!
@@ -99,7 +100,7 @@ class ScreenRotationAnimation {
         try {
             try {
                 mSurface = new Surface(session, 0, "FreezeSurface",
-                        -1, mWidth, mHeight, PixelFormat.OPAQUE, Surface.FX_SURFACE_SCREENSHOT | Surface.HIDDEN);
+                        -1, mWidth, mHeight, PixelFormat.OPAQUE, isTegra ? 0 : (Surface.FX_SURFACE_SCREENSHOT | Surface.HIDDEN));
                 if (mSurface == null || !mSurface.isValid()) {
                     // Screenshot failed, punt.
                     mSurface = null;
@@ -116,6 +117,35 @@ class ScreenRotationAnimation {
                             "  FREEZE " + mSurface + ": CREATE");
 
             setRotation(originalRotation);
+
+            if (isTegra) {
+                Rect rect = new Rect(0, 0, mWidth, mHeight);
+                Canvas canvas = null;
+
+                try {
+                    canvas = mSurface.lockCanvas(rect);
+                } catch (IllegalArgumentException e) {
+                    Slog.w(TAG, "Unable to lock surface", e);
+                } catch (Surface.OutOfResourcesException e) {
+                    Slog.w(TAG, "Unable to lock surface", e);
+                }
+
+                Bitmap screenshot = Surface.screenshot(0, 0);
+                if (canvas == null || screenshot == null) {
+                    Slog.w(TAG, "Null surface canvas");
+                    mSurface.destroy();
+                    mSurface = null;
+                    return;
+                }
+
+                Paint paint = new Paint(0);
+                paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
+
+                canvas.drawBitmap(screenshot, 0, 0, paint);
+                mSurface.unlockCanvasAndPost(canvas);
+
+            }
+
         } finally {
             if (!inTransaction) {
                 Surface.closeTransaction();