Turn off AA while notification expanding animation is running

Turn off AA from GriadientDrawable, while drawing with SRC
transfer mode. This CL speeds up drawing by avoiding intermediate
texture buffer in skia.

Bug:72804165
Test: Measured performance with systrace on opening a notifiation.
Change-Id: Icc69de90d81e8b1c4492f97722f72e7440d9acac

diff --git a/graphics/java/android/graphics/drawable/GradientDrawable.java b/graphics/java/android/graphics/drawable/GradientDrawable.java
index f5a6f49..8b5114c 100644 (file)
--- a/graphics/java/android/graphics/drawable/GradientDrawable.java
+++ b/graphics/java/android/graphics/drawable/GradientDrawable.java
@@ -825,6 +825,14 @@ public class GradientDrawable extends Drawable {
         mFillPaint.setXfermode(mode);
     }
 
+    /**
+     * @param aa to draw this drawable with
+     * @hide
+     */
+    public void setAntiAlias(boolean aa) {
+        mFillPaint.setAntiAlias(aa);
+    }
+
     private void buildPathIfDirty() {
         final GradientState st = mGradientState;
         if (mPathIsDirty) {

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationBackgroundView.java b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationBackgroundView.java
index d6beb7f..ab89a52 100644 (file)
--- a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationBackgroundView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationBackgroundView.java
@@ -249,6 +249,9 @@ public class NotificationBackgroundView extends View {
                     (GradientDrawable) ((LayerDrawable) mBackground).getDrawable(0);
             gradientDrawable.setXfermode(
                     running ? new PorterDuffXfermode(PorterDuff.Mode.SRC) : null);
+            // Speed optimization: disable AA if transfer mode is not SRC_OVER. AA is not easy to
+            // spot during animation anyways.
+            gradientDrawable.setAntiAlias(!running);
         }
         if (!mExpandAnimationRunning) {
             setDrawableAlpha(mDrawableAlpha);