Minor fixes to SurfaceTexture transform matrix.

- Sometimes, the applyUpdate was applied through draw() and the
  underlying matrix was not updated in time, causing "jitter".  Add a
  matrix update call in draw().

- Switch to invalidateParentIfNeeded() in setTransform().

Change-Id: I1cf9cdfe78f9d989821cdc9600984fc826430211

core/java/android/view/TextureView.java

@@ -261,6 +261,7 @@ public class TextureView extends View {
     @Override
     public final void draw(Canvas canvas) {
         applyUpdate();
+        applyTransformMatrix();
     }
 
     /**
@@ -315,11 +316,7 @@ public class TextureView extends View {
         }
 
         applyUpdate();
-
-        if (mMatrixChanged) {
-            mLayer.setTransform(mMatrix);
-            mMatrixChanged = false;
-        }
+        applyTransformMatrix();
 
         return mLayer;
     }
@@ -386,7 +383,7 @@ public class TextureView extends View {
     public void setTransform(Matrix transform) {
         mMatrix.set(transform);
         mMatrixChanged = true;
-        invalidate();
+        invalidateParentIfNeeded();
     }
 
     /**
@@ -410,6 +407,13 @@ public class TextureView extends View {
         return transform;
     }
 
+    private void applyTransformMatrix() {
+        if (mMatrixChanged) {
+            mLayer.setTransform(mMatrix);
+            mMatrixChanged = false;
+        }
+    }
+
     /**
      * <p>Returns a {@link android.graphics.Bitmap} representation of the content
      * of the associated surface texture. If the surface texture is not available,