From fe59c4de423ca38bab718daf0c9a0da649f18293 Mon Sep 17 00:00:00 2001
From: Galia Peycheva <galinap@google.com>
Date: Mon, 31 Jan 2022 11:46:05 +0100
Subject: [PATCH] Add background blur activity to silkfx

Bug: 213292227
Test: m SilkFX && adb install $OUT/testcases/SilkFX/arm/SilkFX.apk
Test: adb shell am start -n com.android.test.silkfx/.materials.BackgroundBlurActivity
Change-Id: I1692a53460b64b5a49d14736b2b680069217fa1d
---
 tests/SilkFX/AndroidManifest.xml              |  10 +-
 .../res/drawable/background_blur_drawable.xml |  20 ++
 ...lur_activity_background_drawable_white.xml |  20 ++
 .../res/layout/activity_background_blur.xml   | 173 ++++++++++++++++
 tests/SilkFX/res/values/style.xml             |  31 +++
 .../src/com/android/test/silkfx/Main.kt       |   8 +-
 .../materials/BackgroundBlurActivity.kt       | 189 ++++++++++++++++++
 7 files changed, 446 insertions(+), 5 deletions(-)
 create mode 100644 tests/SilkFX/res/drawable/background_blur_drawable.xml
 create mode 100644 tests/SilkFX/res/drawable/blur_activity_background_drawable_white.xml
 create mode 100644 tests/SilkFX/res/layout/activity_background_blur.xml
 create mode 100644 tests/SilkFX/res/values/style.xml
 create mode 100644 tests/SilkFX/src/com/android/test/silkfx/materials/BackgroundBlurActivity.kt

diff --git a/tests/SilkFX/AndroidManifest.xml b/tests/SilkFX/AndroidManifest.xml
index c30d76137f76b..21256d8c9d0bb 100644
--- a/tests/SilkFX/AndroidManifest.xml
+++ b/tests/SilkFX/AndroidManifest.xml
@@ -20,17 +20,20 @@
     <uses-sdk android:minSdkVersion="30"/>
 
     <uses-permission android:name="android.permission.CONTROL_DISPLAY_BRIGHTNESS" />
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
 
     <application android:label="SilkFX"
          android:theme="@android:style/Theme.Material">
 
         <activity android:name=".Main"
              android:label="SilkFX Demos"
+             android:banner="@drawable/background1"
              android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.DEFAULT"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.LEANBACK_LAUNCHER"/>
             </intent-filter>
         </activity>
 
@@ -41,13 +44,16 @@
 
         <activity android:name=".materials.GlassActivity"
             android:label="Glass Examples"
-            android:banner="@drawable/background1"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
             </intent-filter>
         </activity>
 
+        <activity android:name=".materials.BackgroundBlurActivity"
+            android:theme="@style/Theme.BackgroundBlurTheme"
+            android:exported="true">
+        </activity>
+
     </application>
 </manifest>
diff --git a/tests/SilkFX/res/drawable/background_blur_drawable.xml b/tests/SilkFX/res/drawable/background_blur_drawable.xml
new file mode 100644
index 0000000000000..173ca99bdfdfe
--- /dev/null
+++ b/tests/SilkFX/res/drawable/background_blur_drawable.xml
@@ -0,0 +1,20 @@
+<!--
+  ~ Copyright (C) 2022 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.
+  -->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+           android:shape="rectangle">
+    <solid android:color="#20FFFFFF"/>
+    <corners android:radius="10dp"/>
+</shape>
diff --git a/tests/SilkFX/res/drawable/blur_activity_background_drawable_white.xml b/tests/SilkFX/res/drawable/blur_activity_background_drawable_white.xml
new file mode 100644
index 0000000000000..bd8942d46383c
--- /dev/null
+++ b/tests/SilkFX/res/drawable/blur_activity_background_drawable_white.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 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.
+  -->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="10dp"/>
+</shape>
diff --git a/tests/SilkFX/res/layout/activity_background_blur.xml b/tests/SilkFX/res/layout/activity_background_blur.xml
new file mode 100644
index 0000000000000..f13c0883cb017
--- /dev/null
+++ b/tests/SilkFX/res/layout/activity_background_blur.xml
@@ -0,0 +1,173 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 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.
+  -->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/background"
+    android:layout_width="390dp"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:padding="15dp"
+    android:orientation="vertical"
+    tools:context=".materials.BackgroundBlurActivity">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:padding="10dp"
+        android:textColor="#ffffffff"
+        android:text="Hello blurry world!"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textColor="#ffffffff"
+            android:text="Background blur"/>
+
+        <SeekBar
+            android:id="@+id/set_background_blur"
+            android:min="0"
+            android:max="300"
+            android:layout_width="160dp"
+            android:layout_height="wrap_content"/>
+        <TextView
+            android:id="@+id/background_blur_radius"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textColor="#ffffffff"
+            android:ems="3"
+            android:gravity="center"
+            android:paddingLeft="10dp"
+            android:paddingRight="10dp"
+            android:text="TODO"/>
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textColor="#ffffffff"
+            android:text="Background alpha"/>
+
+        <SeekBar
+            android:id="@+id/set_background_alpha"
+            android:min="0"
+            android:max="100"
+            android:layout_width="160dp"
+            android:layout_height="wrap_content" />
+        <TextView
+            android:id="@+id/background_alpha"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textColor="#ffffffff"
+            android:ems="3"
+            android:gravity="center"
+            android:paddingLeft="10dp"
+            android:paddingRight="10dp"
+            android:text="TODO"/>
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textColor="#ffffffff"
+            android:text="Blur behind"/>
+
+        <SeekBar
+            android:id="@+id/set_blur_behind"
+            android:min="0"
+            android:max="300"
+            android:layout_width="160dp"
+            android:layout_height="wrap_content" />
+        <TextView
+            android:id="@+id/blur_behind_radius"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:textColor="#ffffffff"
+            android:paddingLeft="10dp"
+            android:paddingRight="10dp"
+            android:ems="3"
+            android:text="TODO"/>
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textColor="#ffffffff"
+            android:text="Dim amount"/>
+
+        <SeekBar
+            android:id="@+id/set_dim_amount"
+            android:min="0"
+            android:max="100"
+            android:layout_width="160dp"
+            android:layout_height="wrap_content" />
+        <TextView
+            android:id="@+id/dim_amount"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:textColor="#ffffffff"
+            android:paddingLeft="10dp"
+            android:paddingRight="10dp"
+            android:ems="3"
+            android:text="TODO"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:layout_marginTop="5dp"
+        android:orientation="vertical"
+        android:gravity="center">
+
+        <Button
+            android:id="@+id/toggle_blur_enabled"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Disable blur"
+            android:onClick="toggleForceBlurDisabled"/>
+
+        <Button
+            android:id="@+id/toggle_battery_saving_mode"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="TODO"
+            android:onClick="toggleBatterySavingMode"/>
+    </LinearLayout>
+    <requestFocus/>
+
+</LinearLayout>
diff --git a/tests/SilkFX/res/values/style.xml b/tests/SilkFX/res/values/style.xml
new file mode 100644
index 0000000000000..66edbb5c93828
--- /dev/null
+++ b/tests/SilkFX/res/values/style.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 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.
+  -->
+<!-- Styles for immersive actions UI. -->
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <style name="Theme.BackgroundBlurTheme" parent= "Theme.AppCompat.Dialog">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowBlurBehindEnabled">true</item>
+        <item name="android:backgroundDimEnabled">false</item>
+        <item name="android:windowElevation">0dp</item>
+        <item name="buttonStyle">@style/AppTheme.Button</item>
+        <item name="colorAccent">#bbffffff</item>
+    </style>
+    <style name="AppTheme.Button" parent="Widget.AppCompat.Button">
+        <item name="android:textColor">#ffffffff</item>
+    </style>
+
+</resources>
diff --git a/tests/SilkFX/src/com/android/test/silkfx/Main.kt b/tests/SilkFX/src/com/android/test/silkfx/Main.kt
index 9ed8d2f5edf7d..7132ae8772eac 100644
--- a/tests/SilkFX/src/com/android/test/silkfx/Main.kt
+++ b/tests/SilkFX/src/com/android/test/silkfx/Main.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 The Android Open Source Project
+ * Copyright (C) 2022 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.
@@ -30,6 +30,7 @@ import com.android.test.silkfx.app.EXTRA_LAYOUT
 import com.android.test.silkfx.app.EXTRA_TITLE
 import com.android.test.silkfx.hdr.GlowActivity
 import com.android.test.silkfx.materials.GlassActivity
+import com.android.test.silkfx.materials.BackgroundBlurActivity
 import kotlin.reflect.KClass
 
 class Demo(val name: String, val makeIntent: (Context) -> Intent) {
@@ -51,7 +52,8 @@ private val AllDemos = listOf(
                 Demo("Blingy Notifications", R.layout.bling_notifications)
         )),
         DemoGroup("Materials", listOf(
-                Demo("Glass", GlassActivity::class)
+                Demo("Glass", GlassActivity::class),
+                Demo("Background Blur", BackgroundBlurActivity::class)
         ))
 )
 
@@ -126,4 +128,4 @@ class Main : Activity() {
 
         AllDemos.forEachIndexed { index, _ -> list.expandGroup(index) }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/SilkFX/src/com/android/test/silkfx/materials/BackgroundBlurActivity.kt b/tests/SilkFX/src/com/android/test/silkfx/materials/BackgroundBlurActivity.kt
new file mode 100644
index 0000000000000..9d17d38d42985
--- /dev/null
+++ b/tests/SilkFX/src/com/android/test/silkfx/materials/BackgroundBlurActivity.kt
@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2022 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.test.silkfx.materials
+
+import android.app.Activity
+import android.content.Intent
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
+import android.graphics.drawable.PaintDrawable
+import android.graphics.drawable.Drawable
+import android.os.Bundle
+import android.provider.Settings
+import android.util.TypedValue
+import android.view.View
+import android.view.WindowManager
+import android.widget.ImageView
+import android.widget.SeekBar
+import android.widget.Switch
+import android.widget.TextView
+import com.android.test.silkfx.R
+import com.android.internal.graphics.drawable.BackgroundBlurDrawable
+import android.widget.LinearLayout
+import android.widget.Button
+
+import android.view.ViewRootImpl
+
+class BackgroundBlurActivity : Activity(), SeekBar.OnSeekBarChangeListener  {
+    var mBackgroundDrawable = PaintDrawable(Color.WHITE)
+    var mBackgroundBlurRadius = 50
+    var mAlphaWithBlur = 0.2f
+    var mAlphaNoBlur = 0.5f
+
+    var mBlurBehindRadius = 10
+    var mDimAmountWithBlur = 0.2f
+    var mDimAmountNoBlur = 0.2f
+
+    var mBlurForceDisabled = false
+    var mBatterySavingModeOn = false
+
+    lateinit var blurBackgroundSeekBar: SeekBar
+    lateinit var backgroundAlphaSeekBar : SeekBar
+    lateinit var blurBehindSeekBar : SeekBar
+    lateinit var dimAmountSeekBar : SeekBar
+
+    val blurEnabledListener = { enabled : Boolean ->
+        blurBackgroundSeekBar.setProgress(mBackgroundBlurRadius)
+        blurBehindSeekBar.setProgress(mBlurBehindRadius)
+
+        if (enabled) {
+            setBackgroundBlur(mBackgroundBlurRadius)
+            setBackgroundColorAlpha(mAlphaWithBlur)
+
+            setBlurBehind(mBlurBehindRadius)
+            setDimAmount(mDimAmountWithBlur)
+
+            backgroundAlphaSeekBar.setProgress((mAlphaWithBlur * 100).toInt())
+            dimAmountSeekBar.setProgress((mDimAmountWithBlur * 100).toInt())
+        } else {
+            setBackgroundColorAlpha(mAlphaNoBlur)
+            setDimAmount(mDimAmountNoBlur)
+
+            backgroundAlphaSeekBar.setProgress((mAlphaNoBlur * 100).toInt())
+            dimAmountSeekBar.setProgress((mDimAmountNoBlur * 100).toInt())
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_background_blur)
+
+        window.addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND)
+        window.addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
+
+        mBackgroundDrawable.setCornerRadius(30f)
+        window.setBackgroundDrawable(mBackgroundDrawable)
+
+        mBatterySavingModeOn =
+            Settings.Global.getInt(getContentResolver(), Settings.Global.LOW_POWER_MODE, 0) == 1
+        setBatterySavingModeOn(mBatterySavingModeOn)
+
+        blurBackgroundSeekBar = requireViewById(R.id.set_background_blur)
+        backgroundAlphaSeekBar = requireViewById(R.id.set_background_alpha)
+        blurBehindSeekBar = requireViewById(R.id.set_blur_behind)
+        dimAmountSeekBar = requireViewById(R.id.set_dim_amount)
+
+        arrayOf(blurBackgroundSeekBar, backgroundAlphaSeekBar, blurBehindSeekBar, dimAmountSeekBar)
+                .forEach {
+                    it.setOnSeekBarChangeListener(this)
+                }
+    }
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        getWindowManager().addCrossWindowBlurEnabledListener(blurEnabledListener)
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        getWindowManager().removeCrossWindowBlurEnabledListener(blurEnabledListener)
+    }
+
+    override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
+        when (seekBar) {
+            blurBackgroundSeekBar -> setBackgroundBlur(progress)
+            backgroundAlphaSeekBar -> setBackgroundColorAlpha(progress / 100.0f)
+            blurBehindSeekBar -> setBlurBehind(progress)
+            dimAmountSeekBar -> setDimAmount(progress / 100.0f)
+            else -> throw IllegalArgumentException("Unknown seek bar")
+        }
+    }
+
+    override fun onStartTrackingTouch(seekBar: SeekBar?) {}
+    override fun onStopTrackingTouch(seekBar: SeekBar?) {}
+
+    fun setBlurDisabled(disabled: Boolean) {
+        mBlurForceDisabled = disabled
+        Settings.Global.putInt(getContentResolver(), Settings.Global.DISABLE_WINDOW_BLURS,
+                if (mBlurForceDisabled) 1 else 0)
+        (findViewById(R.id.toggle_blur_enabled) as Button)
+                .setText(if (mBlurForceDisabled) "Enable blurs" else "Disable blurs")
+    }
+
+    fun toggleForceBlurDisabled(v: View) {
+        setBlurDisabled(!mBlurForceDisabled)
+    }
+
+    fun setBackgroundBlur(radius: Int) {
+        mBackgroundBlurRadius = radius
+        (findViewById(R.id.background_blur_radius) as TextView).setText(radius.toString())
+        window.setBackgroundBlurRadius(mBackgroundBlurRadius)
+    }
+
+    fun setBlurBehind(radius: Int) {
+        mBlurBehindRadius = radius
+        (findViewById(R.id.blur_behind_radius) as TextView).setText(radius.toString())
+        window.getAttributes().setBlurBehindRadius(mBlurBehindRadius)
+        window.setAttributes(window.getAttributes())
+    }
+
+    fun setDimAmount(amount: Float) {
+        if (getWindowManager().isCrossWindowBlurEnabled()) {
+            mDimAmountWithBlur = amount
+        } else {
+            mDimAmountNoBlur = amount
+        }
+        (findViewById(R.id.dim_amount) as TextView).setText("%.2f".format(amount))
+        window.getAttributes().dimAmount = amount
+        window.setAttributes(window.getAttributes())
+    }
+
+    fun setBatterySavingModeOn(on: Boolean) {
+        mBatterySavingModeOn = on
+        Settings.Global.putInt(getContentResolver(),
+            Settings.Global.LOW_POWER_MODE, if (on) 1 else 0)
+        (findViewById(R.id.toggle_battery_saving_mode) as Button).setText(
+            if (on) "Exit low power mode" else "Enter low power mode")
+    }
+
+    fun toggleBatterySavingMode(v: View) {
+        setBatterySavingModeOn(!mBatterySavingModeOn)
+    }
+
+    fun setBackgroundColorAlpha(alpha: Float) {
+        if (getWindowManager().isCrossWindowBlurEnabled()) {
+            mAlphaWithBlur = alpha
+        } else {
+            mAlphaNoBlur = alpha
+        }
+        (findViewById(R.id.background_alpha) as TextView).setText("%.2f".format(alpha))
+        mBackgroundDrawable.setAlpha((alpha * 255f).toInt())
+        getWindowManager().updateViewLayout(window.getDecorView(), window.getAttributes())
+    }
+}