From 43f4372c0aa87171f7e8bc3f20f7d2a78e6c6593 Mon Sep 17 00:00:00 2001
From: Jorim Jaggi <jjaggi@google.com>
Date: Wed, 10 Dec 2014 22:17:44 +0100
Subject: [PATCH] Fix low FPS when entering wifi/BT detail panel

Bug: 18665311
Change-Id: If50db68ef3442fceb923ac0466878846c4071981
---
 .../SystemUI/res/layout/qs_detail_header.xml  |  5 +-
 .../res/layout/status_bar_expanded_header.xml |  2 +-
 .../statusbar/AlphaOptimizedImageView.java    | 51 +++++++++++++++++++
 .../statusbar/phone/StatusBarHeaderView.java  |  4 +-
 4 files changed, 58 insertions(+), 4 deletions(-)
 create mode 100644 packages/SystemUI/src/com/android/systemui/statusbar/AlphaOptimizedImageView.java

diff --git a/packages/SystemUI/res/layout/qs_detail_header.xml b/packages/SystemUI/res/layout/qs_detail_header.xml
index 48bb2133fd86f..5a96dc3bd01ed 100644
--- a/packages/SystemUI/res/layout/qs_detail_header.xml
+++ b/packages/SystemUI/res/layout/qs_detail_header.xml
@@ -14,7 +14,8 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<com.android.keyguard.AlphaOptimizedLinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_alignParentBottom="true"
@@ -36,4 +37,4 @@
         android:clickable="false"
         android:textAppearance="@style/TextAppearance.QS.DetailHeader" />
 
-</LinearLayout>
\ No newline at end of file
+</com.android.keyguard.AlphaOptimizedLinearLayout>
\ No newline at end of file
diff --git a/packages/SystemUI/res/layout/status_bar_expanded_header.xml b/packages/SystemUI/res/layout/status_bar_expanded_header.xml
index 2fb7cdbf408af..f717ac771df5e 100644
--- a/packages/SystemUI/res/layout/status_bar_expanded_header.xml
+++ b/packages/SystemUI/res/layout/status_bar_expanded_header.xml
@@ -154,7 +154,7 @@
         android:layout_alignParentBottom="true"
         />
 
-    <ImageView
+    <com.android.systemui.statusbar.AlphaOptimizedImageView
         android:id="@+id/qs_detail_header_progress"
         android:src="@drawable/indeterminate_anim"
         android:alpha="0"
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/AlphaOptimizedImageView.java b/packages/SystemUI/src/com/android/systemui/statusbar/AlphaOptimizedImageView.java
new file mode 100644
index 0000000000000..094161d3e8aa3
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/AlphaOptimizedImageView.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.systemui.statusbar;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.ImageView;
+
+/**
+ * An ImageView which does not have overlapping rendering commands and therefore does not need a
+ * layer when alpha is changed.
+ */
+public class AlphaOptimizedImageView extends ImageView
+{
+    public AlphaOptimizedImageView(Context context) {
+        super(context);
+    }
+
+    public AlphaOptimizedImageView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public AlphaOptimizedImageView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public AlphaOptimizedImageView(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
index 247252cfcc48e..181926c61193b 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
@@ -777,9 +777,11 @@ public class StatusBarHeaderView extends RelativeLayout implements View.OnClickL
                 v.bringToFront();
                 v.setVisibility(VISIBLE);
             }
+            if (v.hasOverlappingRendering()) {
+                v.animate().withLayer();
+            }
             v.animate()
                     .alpha(in ? 1 : 0)
-                    .withLayer()
                     .withEndAction(new Runnable() {
                         @Override
                         public void run() {