From 2ccaf6a448408d3504a4b1cd4c47a9a2b66499cf Mon Sep 17 00:00:00 2001
From: John Reck <jreck@google.com>
Date: Thu, 26 May 2016 14:36:42 -0700
Subject: [PATCH] Change overdraw test to use windowbackground

Bug: 28786023

Fixes an issue where the first couple frames would
be extremely slow due to the simpleness of HWUI's
overdraw rejection optimization.

Change-Id: I1fe3d83f7e2e0eb3299124b00b9f877c2c3aebf9
---
 .../uibench/FullscreenOverdrawActivity.java   | 36 +++++++++++++------
 1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/tests/UiBench/src/com/android/test/uibench/FullscreenOverdrawActivity.java b/tests/UiBench/src/com/android/test/uibench/FullscreenOverdrawActivity.java
index f1ecc5624d577..b9c5fac96a3eb 100644
--- a/tests/UiBench/src/com/android/test/uibench/FullscreenOverdrawActivity.java
+++ b/tests/UiBench/src/com/android/test/uibench/FullscreenOverdrawActivity.java
@@ -19,8 +19,11 @@ import android.animation.ObjectAnimator;
 import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.PixelFormat;
 import android.graphics.Color;
 import android.graphics.Paint;
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
@@ -31,37 +34,48 @@ import android.view.View;
  * This should all be optimized out by the renderer.
  */
 public class FullscreenOverdrawActivity extends AppCompatActivity {
-    private class OverdrawView extends View {
+    private class OverdrawDrawable extends Drawable {
         Paint paint = new Paint();
         int mColorValue = 0;
 
-        public OverdrawView(Context context) {
-            super(context);
-        }
-
         @SuppressWarnings("unused")
         public void setColorValue(int colorValue) {
             mColorValue = colorValue;
-            invalidate();
+            invalidateSelf();
         }
 
         @Override
-        protected void onDraw(Canvas canvas) {
+        public void draw(Canvas canvas) {
             paint.setColor(Color.rgb(mColorValue, 255 - mColorValue, 255));
 
             for (int i = 0; i < 400; i++) {
-                canvas.drawRect(0, 0, getWidth(), getHeight(), paint);
+                canvas.drawRect(getBounds(), paint);
             }
         }
+
+        @Override
+        public void setAlpha(int alpha) {
+        }
+
+        @Override
+        public void setColorFilter(ColorFilter colorFilter) {
+        }
+
+        @Override
+        public int getOpacity() {
+            return PixelFormat.OPAQUE;
+        }
     }
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        OverdrawView overdrawView = new OverdrawView(this);
-        setContentView(overdrawView);
+        OverdrawDrawable overdraw = new OverdrawDrawable();
+        getWindow().setBackgroundDrawable(overdraw);
 
-        ObjectAnimator objectAnimator = ObjectAnimator.ofInt(overdrawView, "colorValue", 0, 255);
+        setContentView(new View(this));
+
+        ObjectAnimator objectAnimator = ObjectAnimator.ofInt(overdraw, "colorValue", 0, 255);
         objectAnimator.setRepeatMode(ValueAnimator.REVERSE);
         objectAnimator.setRepeatCount(ValueAnimator.INFINITE);
         objectAnimator.start();