Merge changes from topic "noise-ripple" into tm-qpr-dev

* changes:
  Add turbulence noise effects after ripple in UMO.
  Add a turbulence noise shader for media player and ghost loading effects.

packages/SystemUI/res/layout/media_session_view.xml

@@ -44,7 +44,7 @@
         android:background="@drawable/qs_media_outline_album_bg"
         />
 
-    <com.android.systemui.ripple.MultiRippleView
+    <com.android.systemui.surfaceeffects.ripple.MultiRippleView
         android:id="@+id/touch_ripple_view"
         android:layout_width="match_parent"
         android:layout_height="@dimen/qs_media_session_height_expanded"
@@ -53,6 +53,15 @@
         app:layout_constraintTop_toTopOf="@id/album_art"
         app:layout_constraintBottom_toBottomOf="@id/album_art" />
 
+    <com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseView
+        android:id="@+id/turbulence_noise_view"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/qs_media_session_height_expanded"
+        app:layout_constraintStart_toStartOf="@id/album_art"
+        app:layout_constraintEnd_toEndOf="@id/album_art"
+        app:layout_constraintTop_toTopOf="@id/album_art"
+        app:layout_constraintBottom_toBottomOf="@id/album_art" />
+
     <!-- Guideline for output switcher -->
     <androidx.constraintlayout.widget.Guideline
         android:id="@+id/center_vertical_guideline"

packages/SystemUI/res/layout/wireless_charging_layout.xml

@@ -22,7 +22,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <com.android.systemui.ripple.RippleView
+    <com.android.systemui.surfaceeffects.ripple.RippleView
         android:id="@+id/wireless_charging_ripple"
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>

packages/SystemUI/res/xml/media_session_collapsed.xml

@@ -44,6 +44,16 @@
         app:layout_constraintTop_toTopOf="@+id/album_art"
         app:layout_constraintBottom_toBottomOf="@+id/album_art" />
 
+    <!-- Turbulence noise must have the same constraint as the album art. -->
+    <Constraint
+        android:id="@+id/turbulence_noise_view"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/qs_media_session_height_collapsed"
+        app:layout_constraintStart_toStartOf="@+id/album_art"
+        app:layout_constraintEnd_toEndOf="@+id/album_art"
+        app:layout_constraintTop_toTopOf="@+id/album_art"
+        app:layout_constraintBottom_toBottomOf="@+id/album_art" />
+
     <Constraint
         android:id="@+id/header_title"
         android:layout_width="wrap_content"

packages/SystemUI/res/xml/media_session_expanded.xml

@@ -37,6 +37,16 @@
         app:layout_constraintTop_toTopOf="@+id/album_art"
         app:layout_constraintBottom_toBottomOf="@+id/album_art" />
 
+    <!-- Turbulence noise must have the same constraint as the album art. -->
+    <Constraint
+        android:id="@+id/turbulence_noise_view"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/qs_media_session_height_expanded"
+        app:layout_constraintStart_toStartOf="@+id/album_art"
+        app:layout_constraintEnd_toEndOf="@+id/album_art"
+        app:layout_constraintTop_toTopOf="@+id/album_art"
+        app:layout_constraintBottom_toBottomOf="@+id/album_art" />
+
     <Constraint
         android:id="@+id/header_title"
         android:layout_width="wrap_content"

packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleView.kt

@@ -29,7 +29,7 @@ import android.view.View
 import android.view.animation.PathInterpolator
 import com.android.internal.graphics.ColorUtils
 import com.android.systemui.animation.Interpolators
-import com.android.systemui.ripple.RippleShader
+import com.android.systemui.surfaceeffects.ripple.RippleShader
 
 private const val RIPPLE_SPARKLE_STRENGTH: Float = 0.4f
 

packages/SystemUI/src/com/android/systemui/charging/WiredChargingRippleController.kt

@@ -31,7 +31,7 @@ import com.android.systemui.R
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.flags.FeatureFlags
 import com.android.systemui.flags.Flags
-import com.android.systemui.ripple.RippleView
+import com.android.systemui.surfaceeffects.ripple.RippleView
 import com.android.systemui.statusbar.commandline.Command
 import com.android.systemui.statusbar.commandline.CommandRegistry
 import com.android.systemui.statusbar.policy.BatteryController

packages/SystemUI/src/com/android/systemui/charging/WirelessChargingAnimation.java

@@ -30,7 +30,7 @@ import android.view.WindowManager;
 
 import com.android.internal.logging.UiEvent;
 import com.android.internal.logging.UiEventLogger;
-import com.android.systemui.ripple.RippleShader.RippleShape;
+import com.android.systemui.surfaceeffects.ripple.RippleShader.RippleShape;
 
 /**
  * A WirelessChargingAnimation is a view containing view + animation for wireless charging.

packages/SystemUI/src/com/android/systemui/charging/WirelessChargingLayout.java

@@ -33,9 +33,9 @@ import android.widget.TextView;
 import com.android.settingslib.Utils;
 import com.android.systemui.R;
 import com.android.systemui.animation.Interpolators;
-import com.android.systemui.ripple.RippleAnimationConfig;
+import com.android.systemui.surfaceeffects.ripple.RippleAnimationConfig;
-import com.android.systemui.ripple.RippleShader.RippleShape;
+import com.android.systemui.surfaceeffects.ripple.RippleShader.RippleShape;
-import com.android.systemui.ripple.RippleView;
+import com.android.systemui.surfaceeffects.ripple.RippleView;
 
 import java.text.NumberFormat;
 

packages/SystemUI/src/com/android/systemui/media/controls/models/player/MediaViewHolder.kt

@@ -26,7 +26,8 @@ import android.widget.TextView
 import androidx.constraintlayout.widget.Barrier
 import com.android.systemui.R
 import com.android.systemui.media.controls.models.GutsViewHolder
-import com.android.systemui.ripple.MultiRippleView
+import com.android.systemui.surfaceeffects.ripple.MultiRippleView
+import com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseView
 import com.android.systemui.util.animation.TransitionLayout
 
 private const val TAG = "MediaViewHolder"
@@ -38,6 +39,8 @@ class MediaViewHolder constructor(itemView: View) {
     // Player information
     val albumView = itemView.requireViewById<ImageView>(R.id.album_art)
     val multiRippleView = itemView.requireViewById<MultiRippleView>(R.id.touch_ripple_view)
+    val turbulenceNoiseView =
+        itemView.requireViewById<TurbulenceNoiseView>(R.id.turbulence_noise_view)
     val appIcon = itemView.requireViewById<ImageView>(R.id.icon)
     val titleText = itemView.requireViewById<TextView>(R.id.header_title)
     val artistText = itemView.requireViewById<TextView>(R.id.header_artist)

packages/SystemUI/src/com/android/systemui/media/controls/ui/ColorSchemeTransition.kt

@@ -29,7 +29,8 @@ import com.android.internal.annotations.VisibleForTesting
 import com.android.settingslib.Utils
 import com.android.systemui.media.controls.models.player.MediaViewHolder
 import com.android.systemui.monet.ColorScheme
-import com.android.systemui.ripple.MultiRippleController
+import com.android.systemui.surfaceeffects.ripple.MultiRippleController
+import com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseController
 
 /**
  * A [ColorTransition] is an object that updates the colors of views each time [updateColorScheme]
@@ -102,13 +103,21 @@ internal constructor(
     private val context: Context,
     private val mediaViewHolder: MediaViewHolder,
     private val multiRippleController: MultiRippleController,
+    private val turbulenceNoiseController: TurbulenceNoiseController,
     animatingColorTransitionFactory: AnimatingColorTransitionFactory
 ) {
     constructor(
         context: Context,
         mediaViewHolder: MediaViewHolder,
         multiRippleController: MultiRippleController,
-    ) : this(context, mediaViewHolder, multiRippleController, ::AnimatingColorTransition)
+        turbulenceNoiseController: TurbulenceNoiseController
+    ) : this(
+        context,
+        mediaViewHolder,
+        multiRippleController,
+        turbulenceNoiseController,
+        ::AnimatingColorTransition
+    )
 
     val bgColor = context.getColor(com.android.systemui.R.color.material_dynamic_secondary95)
     val surfaceColor =
@@ -129,6 +138,7 @@ internal constructor(
             mediaViewHolder.actionPlayPause.backgroundTintList = accentColorList
             mediaViewHolder.gutsViewHolder.setAccentPrimaryColor(accentPrimary)
             multiRippleController.updateColor(accentPrimary)
+            turbulenceNoiseController.updateNoiseColor(accentPrimary)
         }
 
     val accentSecondary =

packages/SystemUI/src/com/android/systemui/media/controls/ui/MediaControlPanel.java

@@ -31,6 +31,7 @@ import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.res.ColorStateList;
+import android.graphics.BlendMode;
 import android.graphics.Color;
 import android.graphics.ColorMatrix;
 import android.graphics.ColorMatrixColorFilter;
@@ -64,6 +65,7 @@ import androidx.annotation.UiThread;
 import androidx.constraintlayout.widget.ConstraintSet;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.graphics.ColorUtils;
 import com.android.internal.jank.InteractionJankMonitor;
 import com.android.internal.logging.InstanceId;
 import com.android.settingslib.widget.AdaptiveIcon;
@@ -97,13 +99,16 @@ import com.android.systemui.monet.ColorScheme;
 import com.android.systemui.monet.Style;
 import com.android.systemui.plugins.ActivityStarter;
 import com.android.systemui.plugins.FalsingManager;
-import com.android.systemui.ripple.MultiRippleController;
-import com.android.systemui.ripple.RippleAnimation;
-import com.android.systemui.ripple.RippleAnimationConfig;
-import com.android.systemui.ripple.RippleShader;
 import com.android.systemui.shared.system.SysUiStatsLog;
 import com.android.systemui.statusbar.NotificationLockscreenUserManager;
 import com.android.systemui.statusbar.policy.KeyguardStateController;
+import com.android.systemui.surfaceeffects.ripple.MultiRippleController;
+import com.android.systemui.surfaceeffects.ripple.MultiRippleView;
+import com.android.systemui.surfaceeffects.ripple.RippleAnimation;
+import com.android.systemui.surfaceeffects.ripple.RippleAnimationConfig;
+import com.android.systemui.surfaceeffects.ripple.RippleShader;
+import com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseAnimationConfig;
+import com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseController;
 import com.android.systemui.util.ColorUtilKt;
 import com.android.systemui.util.animation.TransitionLayout;
 import com.android.systemui.util.time.SystemClock;
@@ -216,7 +221,9 @@ public class MediaControlPanel {
     private boolean mShowBroadcastDialogButton = false;
     private String mSwitchBroadcastApp;
     private MultiRippleController mMultiRippleController;
+    private TurbulenceNoiseController mTurbulenceNoiseController;
     private FeatureFlags mFeatureFlags;
+    private TurbulenceNoiseAnimationConfig mTurbulenceNoiseAnimationConfig = null;
 
     /**
      * Initialize a new control panel
@@ -394,9 +401,20 @@ public class MediaControlPanel {
         AnimatorSet exit = loadAnimator(R.anim.media_metadata_exit,
                 Interpolators.EMPHASIZED_ACCELERATE, titleText, artistText);
 
-        mMultiRippleController = new MultiRippleController(vh.getMultiRippleView());
+        MultiRippleView multiRippleView = vh.getMultiRippleView();
+        mMultiRippleController = new MultiRippleController(multiRippleView);
+        mTurbulenceNoiseController = new TurbulenceNoiseController(vh.getTurbulenceNoiseView());
+        multiRippleView.addRipplesFinishedListener(
+                () -> {
+                    if (mTurbulenceNoiseAnimationConfig == null) {
+                        mTurbulenceNoiseAnimationConfig = createLingeringNoiseAnimation();
+                    }
+                    // Color will be correctly updated in ColorSchemeTransition.
+                    mTurbulenceNoiseController.play(mTurbulenceNoiseAnimationConfig);
+                }
+        );
         mColorSchemeTransition = new ColorSchemeTransition(
-                mContext, mMediaViewHolder, mMultiRippleController);
+                mContext, mMediaViewHolder, mMultiRippleController, mTurbulenceNoiseController);
         mMetadataAnimationHandler = new MetadataAnimationHandler(exit, enter);
     }
 
@@ -1027,7 +1045,7 @@ public class MediaControlPanel {
                         /* maxWidth= */ maxSize,
                         /* maxHeight= */ maxSize,
                         /* pixelDensity= */ getContext().getResources().getDisplayMetrics().density,
-                        mColorSchemeTransition.getAccentPrimary().getTargetColor(),
+                        mColorSchemeTransition.getAccentPrimary().getCurrentColor(),
                         /* opacity= */ 100,
                         /* shouldFillRipple= */ false,
                         /* sparkleStrength= */ 0f,
@@ -1036,6 +1054,26 @@ public class MediaControlPanel {
         );
     }
 
+    private TurbulenceNoiseAnimationConfig createLingeringNoiseAnimation() {
+        return new TurbulenceNoiseAnimationConfig(
+                TurbulenceNoiseAnimationConfig.DEFAULT_NOISE_GRID_COUNT,
+                TurbulenceNoiseAnimationConfig.DEFAULT_LUMINOSITY_MULTIPLIER,
+                /* noiseMoveSpeedX= */ 0f,
+                /* noiseMoveSpeedY= */ 0f,
+                TurbulenceNoiseAnimationConfig.DEFAULT_NOISE_SPEED_Z,
+                /* color= */ mColorSchemeTransition.getAccentPrimary().getCurrentColor(),
+                // We want to add (BlendMode.PLUS) the turbulence noise on top of the album art.
+                // Thus, set the background color with alpha 0.
+                /* backgroundColor= */ ColorUtils.setAlphaComponent(Color.BLACK, 0),
+                TurbulenceNoiseAnimationConfig.DEFAULT_OPACITY,
+                /* width= */ mMediaViewHolder.getMultiRippleView().getWidth(),
+                /* height= */ mMediaViewHolder.getMultiRippleView().getHeight(),
+                TurbulenceNoiseAnimationConfig.DEFAULT_NOISE_DURATION_IN_MILLIS,
+                this.getContext().getResources().getDisplayMetrics().density,
+                BlendMode.PLUS,
+                /* onAnimationEnd= */ null
+        );
+    }
     private void clearButton(final ImageButton button) {
         button.setImageDrawable(null);
         button.setContentDescription(null);

packages/SystemUI/src/com/android/systemui/media/taptotransfer/receiver/ReceiverChipRippleView.kt

@@ -18,8 +18,8 @@ package com.android.systemui.media.taptotransfer.receiver
 
 import android.content.Context
 import android.util.AttributeSet
-import com.android.systemui.ripple.RippleShader
+import com.android.systemui.surfaceeffects.ripple.RippleShader
-import com.android.systemui.ripple.RippleView
+import com.android.systemui.surfaceeffects.ripple.RippleView
 
 /**
  * An expanding ripple effect for the media tap-to-transfer receiver chip.

packages/SystemUI/src/com/android/systemui/ripple/RippleShaderUtilLibrary.kt

@@ -1,53 +0,0 @@
-/*
- * 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.systemui.ripple
-
-/** A common utility functions that are used for computing [RippleShader]. */
-class RippleShaderUtilLibrary {
-    //language=AGSL
-    companion object {
-        const val SHADER_LIB = """
-            float triangleNoise(vec2 n) {
-                    n  = fract(n * vec2(5.3987, 5.4421));
-                    n += dot(n.yx, n.xy + vec2(21.5351, 14.3137));
-                    float xy = n.x * n.y;
-                    return fract(xy * 95.4307) + fract(xy * 75.04961) - 1.0;
-                }
-                const float PI = 3.1415926535897932384626;
-
-                float sparkles(vec2 uv, float t) {
-                    float n = triangleNoise(uv);
-                    float s = 0.0;
-                    for (float i = 0; i < 4; i += 1) {
-                        float l = i * 0.01;
-                        float h = l + 0.1;
-                        float o = smoothstep(n - l, h, n);
-                        o *= abs(sin(PI * o * (t + 0.55 * i)));
-                        s += o;
-                    }
-                    return s;
-                }
-
-                vec2 distort(vec2 p, float time, float distort_amount_radial,
-                    float distort_amount_xy) {
-                        float angle = atan(p.y, p.x);
-                          return p + vec2(sin(angle * 8 + time * 0.003 + 1.641),
-                                    cos(angle * 5 + 2.14 + time * 0.00412)) * distort_amount_radial
-                             + vec2(sin(p.x * 0.01 + time * 0.00215 + 0.8123),
-                                    cos(p.y * 0.01 + time * 0.005931)) * distort_amount_xy;
-            }"""
-    }
-}

packages/SystemUI/src/com/android/systemui/statusbar/phone/CentralSurfacesImpl.java

@@ -174,7 +174,6 @@ import com.android.systemui.plugins.statusbar.StatusBarStateController;
 import com.android.systemui.qs.QSFragment;
 import com.android.systemui.qs.QSPanelController;
 import com.android.systemui.recents.ScreenPinningRequest;
-import com.android.systemui.ripple.RippleShader.RippleShape;
 import com.android.systemui.scrim.ScrimView;
 import com.android.systemui.settings.brightness.BrightnessSliderController;
 import com.android.systemui.shade.CameraLauncher;
@@ -234,6 +233,7 @@ import com.android.systemui.statusbar.policy.UserInfoControllerImpl;
 import com.android.systemui.statusbar.policy.UserSwitcherController;
 import com.android.systemui.statusbar.window.StatusBarWindowController;
 import com.android.systemui.statusbar.window.StatusBarWindowStateController;
+import com.android.systemui.surfaceeffects.ripple.RippleShader.RippleShape;
 import com.android.systemui.util.DumpUtilsKt;
 import com.android.systemui.util.WallpaperController;
 import com.android.systemui.util.concurrency.DelayableExecutor;

packages/SystemUI/src/com/android/systemui/surfaceeffects/ripple/MultiRippleController.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import androidx.annotation.VisibleForTesting
 

packages/SystemUI/src/com/android/systemui/surfaceeffects/ripple/MultiRippleView.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.content.Context
 import android.graphics.Canvas
@@ -31,11 +31,21 @@ import android.view.View
 class MultiRippleView(context: Context?, attrs: AttributeSet?) : View(context, attrs) {
 
     internal val ripples = ArrayList<RippleAnimation>()
+    private val listeners = ArrayList<RipplesFinishedListener>()
     private val ripplePaint = Paint()
     private var isWarningLogged = false
 
     companion object {
-        const val TAG = "MultiRippleView"
+        private const val TAG = "MultiRippleView"
+
+        interface RipplesFinishedListener {
+            /** Triggered when all the ripples finish running. */
+            fun onRipplesFinish()
+        }
+    }
+
+    fun addRipplesFinishedListener(listener: RipplesFinishedListener) {
+        listeners.add(listener)
     }
 
     override fun onDraw(canvas: Canvas?) {
@@ -62,6 +72,10 @@ class MultiRippleView(context: Context?, attrs: AttributeSet?) : View(context, a
             shouldInvalidate = shouldInvalidate || anim.isPlaying()
         }
 
-        if (shouldInvalidate) invalidate()
+        if (shouldInvalidate) {
+            invalidate()
+        } else { // Nothing is playing.
+            listeners.forEach { listener -> listener.onRipplesFinish() }
+        }
     }
 }

packages/SystemUI/src/com/android/systemui/surfaceeffects/ripple/RippleAnimation.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.animation.Animator
 import android.animation.AnimatorListenerAdapter

packages/SystemUI/src/com/android/systemui/surfaceeffects/ripple/RippleAnimationConfig.kt

@@ -1,4 +1,4 @@
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.graphics.Color
 

packages/SystemUI/src/com/android/systemui/surfaceeffects/ripple/RippleShader.kt

@@ -13,11 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.graphics.PointF
 import android.graphics.RuntimeShader
 import android.util.MathUtils
+import com.android.systemui.surfaceeffects.shaderutil.SdfShaderLibrary
+import com.android.systemui.surfaceeffects.shaderutil.ShaderUtilLibrary
 
 /**
  * Shader class that renders an expanding ripple effect. The ripple contains three elements:
@@ -39,9 +41,11 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
         ROUNDED_BOX,
         ELLIPSE
     }
-    //language=AGSL
+    // language=AGSL
     companion object {
-        private const val SHADER_UNIFORMS = """uniform vec2 in_center;
+        private const val SHADER_UNIFORMS =
+            """
+            uniform vec2 in_center;
             uniform vec2 in_size;
             uniform float in_progress;
             uniform float in_cornerRadius;
@@ -55,9 +59,12 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
             uniform float in_blur;
             uniform float in_pixelDensity;
             layout(color) uniform vec4 in_color;
-                uniform float in_sparkle_strength;"""
+            uniform float in_sparkle_strength;
+        """
 
-        private const val SHADER_CIRCLE_MAIN = """vec4 main(vec2 p) {
+        private const val SHADER_CIRCLE_MAIN =
+            """
+            vec4 main(vec2 p) {
                 vec2 p_distorted = distort(p, in_time, in_distort_radial, in_distort_xy);
                 float radius = in_size.x * 0.5;
                 float sparkleRing = soften(circleRing(p_distorted-in_center, radius), in_blur);
@@ -73,7 +80,9 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
             }
         """
 
-        private const val SHADER_ROUNDED_BOX_MAIN = """vec4 main(vec2 p) {
+        private const val SHADER_ROUNDED_BOX_MAIN =
+            """
+            vec4 main(vec2 p) {
                 float sparkleRing = soften(roundedBoxRing(p-in_center, in_size, in_cornerRadius,
                     in_thickness), in_blur);
                 float inside = soften(sdRoundedBox(p-in_center, in_size * 1.2, in_cornerRadius),
@@ -89,7 +98,9 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
             }
         """
 
-        private const val SHADER_ELLIPSE_MAIN = """vec4 main(vec2 p) {
+        private const val SHADER_ELLIPSE_MAIN =
+            """
+            vec4 main(vec2 p) {
                 vec2 p_distorted = distort(p, in_time, in_distort_radial, in_distort_xy);
 
                 float sparkleRing = soften(ellipseRing(p_distorted-in_center, in_size), in_blur);
@@ -105,14 +116,23 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
             }
         """
 
-        private const val CIRCLE_SHADER = SHADER_UNIFORMS + RippleShaderUtilLibrary.SHADER_LIB +
+        private const val CIRCLE_SHADER =
-                SdfShaderLibrary.SHADER_SDF_OPERATION_LIB + SdfShaderLibrary.CIRCLE_SDF +
+            SHADER_UNIFORMS +
+                ShaderUtilLibrary.SHADER_LIB +
+                SdfShaderLibrary.SHADER_SDF_OPERATION_LIB +
+                SdfShaderLibrary.CIRCLE_SDF +
                 SHADER_CIRCLE_MAIN
-        private const val ROUNDED_BOX_SHADER = SHADER_UNIFORMS +
+        private const val ROUNDED_BOX_SHADER =
-                RippleShaderUtilLibrary.SHADER_LIB + SdfShaderLibrary.SHADER_SDF_OPERATION_LIB +
+            SHADER_UNIFORMS +
-                SdfShaderLibrary.ROUNDED_BOX_SDF + SHADER_ROUNDED_BOX_MAIN
+                ShaderUtilLibrary.SHADER_LIB +
-        private const val ELLIPSE_SHADER = SHADER_UNIFORMS + RippleShaderUtilLibrary.SHADER_LIB +
+                SdfShaderLibrary.SHADER_SDF_OPERATION_LIB +
-                SdfShaderLibrary.SHADER_SDF_OPERATION_LIB + SdfShaderLibrary.ELLIPSE_SDF +
+                SdfShaderLibrary.ROUNDED_BOX_SDF +
+                SHADER_ROUNDED_BOX_MAIN
+        private const val ELLIPSE_SHADER =
+            SHADER_UNIFORMS +
+                ShaderUtilLibrary.SHADER_LIB +
+                SdfShaderLibrary.SHADER_SDF_OPERATION_LIB +
+                SdfShaderLibrary.ELLIPSE_SDF +
                 SHADER_ELLIPSE_MAIN
 
         private fun buildShader(rippleShape: RippleShape): String =
@@ -130,9 +150,7 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
         }
     }
 
-    /**
+    /** Sets the center position of the ripple. */
-     * Sets the center position of the ripple.
-     */
     fun setCenter(x: Float, y: Float) {
         setFloatUniform("in_center", x, y)
     }
@@ -144,21 +162,21 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
         maxSize.y = height
     }
 
-    /**
+    /** Progress of the ripple. Float value between [0, 1]. */
-     * Progress of the ripple. Float value between [0, 1].
-     */
     var progress: Float = 0.0f
         set(value) {
             field = value
             setFloatUniform("in_progress", value)
             val curvedProg = 1 - (1 - value) * (1 - value) * (1 - value)
 
-            setFloatUniform("in_size", /* width= */ maxSize.x * curvedProg,
+            setFloatUniform(
-                    /* height= */ maxSize.y * curvedProg)
+                "in_size",
+                /* width= */ maxSize.x * curvedProg,
+                /* height= */ maxSize.y * curvedProg
+            )
             setFloatUniform("in_thickness", maxSize.y * curvedProg * 0.5f)
             // radius should not exceed width and height values.
-            setFloatUniform("in_cornerRadius",
+            setFloatUniform("in_cornerRadius", Math.min(maxSize.x, maxSize.y) * curvedProg)
-                    Math.min(maxSize.x, maxSize.y) * curvedProg)
 
             setFloatUniform("in_blur", MathUtils.lerp(1.25f, 0.5f, value))
 
@@ -175,18 +193,14 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
             setFloatUniform("in_fadeRing", Math.min(fadeIn, 1 - fadeOutRipple))
         }
 
-    /**
+    /** Play time since the start of the effect. */
-     * Play time since the start of the effect.
-     */
     var time: Float = 0.0f
         set(value) {
             field = value
             setFloatUniform("in_time", value)
         }
 
-    /**
+    /** A hex value representing the ripple color, in the format of ARGB */
-     * A hex value representing the ripple color, in the format of ARGB
-     */
     var color: Int = 0xffffff
         set(value) {
             field = value
@@ -194,9 +208,9 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
         }
 
     /**
-     * Noise sparkle intensity. Expected value between [0, 1]. The sparkle is white, and thus
+     * Noise sparkle intensity. Expected value between [0, 1]. The sparkle is white, and thus with
-     * with strength 0 it's transparent, leaving the ripple fully smooth, while with strength 1
+     * strength 0 it's transparent, leaving the ripple fully smooth, while with strength 1 it's
-     * it's opaque white and looks the most grainy.
+     * opaque white and looks the most grainy.
      */
     var sparkleStrength: Float = 0.0f
         set(value) {
@@ -204,9 +218,7 @@ class RippleShader internal constructor(rippleShape: RippleShape = RippleShape.C
             setFloatUniform("in_sparkle_strength", value)
         }
 
-    /**
+    /** Distortion strength of the ripple. Expected value between[0, 1]. */
-     * Distortion strength of the ripple. Expected value between[0, 1].
-     */
     var distortionStrength: Float = 0.0f
         set(value) {
             field = value

packages/SystemUI/src/com/android/systemui/surfaceeffects/ripple/RippleView.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.animation.Animator
 import android.animation.AnimatorListenerAdapter
@@ -26,7 +26,7 @@ import android.graphics.Paint
 import android.util.AttributeSet
 import android.view.View
 import androidx.core.graphics.ColorUtils
-import com.android.systemui.ripple.RippleShader.RippleShape
+import com.android.systemui.surfaceeffects.ripple.RippleShader.RippleShape
 
 /**
  * A generic expanding ripple effect.
@@ -98,15 +98,18 @@ open class RippleView(context: Context?, attrs: AttributeSet?) : View(context, a
             rippleShader.time = now.toFloat()
             invalidate()
         }
-        animator.addListener(object : AnimatorListenerAdapter() {
+        animator.addListener(
+            object : AnimatorListenerAdapter() {
                 override fun onAnimationEnd(animation: Animator?) {
                     onAnimationEnd?.run()
                 }
-        })
+            }
+        )
         animator.start()
     }
 
-    /** Set the color to be used for the ripple.
+    /**
+     * Set the color to be used for the ripple.
      *
      * The alpha value of the color will be applied to the ripple. The alpha range is [0-100].
      */
@@ -123,9 +126,7 @@ open class RippleView(context: Context?, attrs: AttributeSet?) : View(context, a
         rippleShader.rippleFill = rippleFill
     }
 
-    /**
+    /** Set the intensity of the sparkles. */
-     * Set the intensity of the sparkles.
-     */
     fun setSparkleStrength(strength: Float) {
         rippleShader.sparkleStrength = strength
     }
@@ -143,20 +144,30 @@ open class RippleView(context: Context?, attrs: AttributeSet?) : View(context, a
         // active effect area. Values here should be kept in sync with the animation implementation
         // in the ripple shader.
         if (rippleShape == RippleShape.CIRCLE) {
-            val maskRadius = (1 - (1 - rippleShader.progress) * (1 - rippleShader.progress) *
+            val maskRadius =
+                (1 -
+                    (1 - rippleShader.progress) *
+                        (1 - rippleShader.progress) *
                         (1 - rippleShader.progress)) * maxWidth
             canvas.drawCircle(centerX, centerY, maskRadius, ripplePaint)
         } else {
-            val maskWidth = (1 - (1 - rippleShader.progress) * (1 - rippleShader.progress) *
+            val maskWidth =
+                (1 -
+                    (1 - rippleShader.progress) *
+                        (1 - rippleShader.progress) *
                         (1 - rippleShader.progress)) * maxWidth * 2
-            val maskHeight = (1 - (1 - rippleShader.progress) * (1 - rippleShader.progress) *
+            val maskHeight =
+                (1 -
+                    (1 - rippleShader.progress) *
+                        (1 - rippleShader.progress) *
                         (1 - rippleShader.progress)) * maxHeight * 2
             canvas.drawRect(
                 /* left= */ centerX - maskWidth,
                 /* top= */ centerY - maskHeight,
                 /* right= */ centerX + maskWidth,
                 /* bottom= */ centerY + maskHeight,
-                    ripplePaint)
+                ripplePaint
+            )
         }
     }
 }

packages/SystemUI/src/com/android/systemui/surfaceeffects/shaderutil/SdfShaderLibrary.kt

@@ -13,13 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.shaderutil
 
 /** Library class that contains 2D signed distance functions. */
 class SdfShaderLibrary {
-    //language=AGSL
+    // language=AGSL
     companion object {
-        const val CIRCLE_SDF = """
+        const val CIRCLE_SDF =
+            """
             float sdCircle(vec2 p, float r) {
                 return (length(p)-r) / r;
             }
@@ -34,7 +35,8 @@ class SdfShaderLibrary {
             }
         """
 
-        const val ROUNDED_BOX_SDF = """
+        const val ROUNDED_BOX_SDF =
+            """
             float sdRoundedBox(vec2 p, vec2 size, float cornerRadius) {
                 size *= 0.5;
                 cornerRadius *= 0.5;
@@ -58,7 +60,8 @@ class SdfShaderLibrary {
         // Used non-trigonometry parametrization and Halley's method (iterative) for root finding.
         // This is more expensive than the regular circle SDF, recommend to use the circle SDF if
         // possible.
-        const val ELLIPSE_SDF = """float sdEllipse(vec2 p, vec2 wh) {
+        const val ELLIPSE_SDF =
+            """float sdEllipse(vec2 p, vec2 wh) {
             wh *= 0.5;
 
             // symmetry
@@ -98,7 +101,8 @@ class SdfShaderLibrary {
         }
         """
 
-        const val SHADER_SDF_OPERATION_LIB = """
+        const val SHADER_SDF_OPERATION_LIB =
+            """
             float soften(float d, float blur) {
                 float blurHalf = blur * 0.5;
                 return smoothstep(-blurHalf, blurHalf, d);

packages/SystemUI/src/com/android/systemui/surfaceeffects/shaderutil/ShaderUtilLibrary.kt

@@ -0,0 +1,148 @@
+/*
+ * 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.systemui.surfaceeffects.shaderutil
+
+/** A common utility functions that are used for computing shaders. */
+class ShaderUtilLibrary {
+    // language=AGSL
+    companion object {
+        const val SHADER_LIB =
+            """
+            float triangleNoise(vec2 n) {
+                n  = fract(n * vec2(5.3987, 5.4421));
+                n += dot(n.yx, n.xy + vec2(21.5351, 14.3137));
+                float xy = n.x * n.y;
+                // compute in [0..2[ and remap to [-1.0..1.0[
+                return fract(xy * 95.4307) + fract(xy * 75.04961) - 1.0;
+            }
+
+            const float PI = 3.1415926535897932384626;
+
+            float sparkles(vec2 uv, float t) {
+                float n = triangleNoise(uv);
+                float s = 0.0;
+                for (float i = 0; i < 4; i += 1) {
+                    float l = i * 0.01;
+                    float h = l + 0.1;
+                    float o = smoothstep(n - l, h, n);
+                    o *= abs(sin(PI * o * (t + 0.55 * i)));
+                    s += o;
+                }
+                return s;
+            }
+
+            vec2 distort(vec2 p, float time, float distort_amount_radial,
+                float distort_amount_xy) {
+                    float angle = atan(p.y, p.x);
+                      return p + vec2(sin(angle * 8 + time * 0.003 + 1.641),
+                                cos(angle * 5 + 2.14 + time * 0.00412)) * distort_amount_radial
+                         + vec2(sin(p.x * 0.01 + time * 0.00215 + 0.8123),
+                                cos(p.y * 0.01 + time * 0.005931)) * distort_amount_xy;
+            }
+
+            // Return range [-1, 1].
+            vec3 hash(vec3 p) {
+                p = fract(p * vec3(.3456, .1234, .9876));
+                p += dot(p, p.yxz + 43.21);
+                p = (p.xxy + p.yxx) * p.zyx;
+                return (fract(sin(p) * 4567.1234567) - .5) * 2.;
+            }
+
+            // Skew factors (non-uniform).
+            const float SKEW = 0.3333333;  // 1/3
+            const float UNSKEW = 0.1666667;  // 1/6
+
+            // Return range roughly [-1,1].
+            // It's because the hash function (that returns a random gradient vector) returns
+            // different magnitude of vectors. Noise doesn't have to be in the precise range thus
+            // skipped normalize.
+            float simplex3d(vec3 p) {
+                // Skew the input coordinate, so that we get squashed cubical grid
+                vec3 s = floor(p + (p.x + p.y + p.z) * SKEW);
+
+                // Unskew back
+                vec3 u = s - (s.x + s.y + s.z) * UNSKEW;
+
+                // Unskewed coordinate that is relative to p, to compute the noise contribution
+                // based on the distance.
+                vec3 c0 = p - u;
+
+                // We have six simplices (in this case tetrahedron, since we are in 3D) that we
+                // could possibly in.
+                // Here, we are finding the correct tetrahedron (simplex shape), and traverse its
+                // four vertices (c0..3) when computing noise contribution.
+                // The way we find them is by comparing c0's x,y,z values.
+                // For example in 2D, we can find the triangle (simplex shape in 2D) that we are in
+                // by comparing x and y values. i.e. x>y lower, x<y, upper triangle.
+                // Same applies in 3D.
+                //
+                // Below indicates the offsets (or offset directions) when c0=(x0,y0,z0)
+                // x0>y0>z0: (1,0,0), (1,1,0), (1,1,1)
+                // x0>z0>y0: (1,0,0), (1,0,1), (1,1,1)
+                // z0>x0>y0: (0,0,1), (1,0,1), (1,1,1)
+                // z0>y0>x0: (0,0,1), (0,1,1), (1,1,1)
+                // y0>z0>x0: (0,1,0), (0,1,1), (1,1,1)
+                // y0>x0>z0: (0,1,0), (1,1,0), (1,1,1)
+                //
+                // The rule is:
+                // * For offset1, set 1 at the max component, otherwise 0.
+                // * For offset2, set 0 at the min component, otherwise 1.
+                // * For offset3, set 1 for all.
+                //
+                // Encode x0-y0, y0-z0, z0-x0 in a vec3
+                vec3 en = c0 - c0.yzx;
+                // Each represents whether x0>y0, y0>z0, z0>x0
+                en = step(vec3(0.), en);
+                // en.zxy encodes z0>x0, x0>y0, y0>x0
+                vec3 offset1 = en * (1. - en.zxy); // find max
+                vec3 offset2 = 1. - en.zxy * (1. - en); // 1-(find min)
+                vec3 offset3 = vec3(1.);
+
+                vec3 c1 = c0 - offset1 + UNSKEW;
+                vec3 c2 = c0 - offset2 + UNSKEW * 2.;
+                vec3 c3 = c0 - offset3 + UNSKEW * 3.;
+
+                // Kernel summation: dot(max(0, r^2-d^2))^4, noise contribution)
+                //
+                // First compute d^2, squared distance to the point.
+                vec4 w; // w = max(0, r^2 - d^2))
+                w.x = dot(c0, c0);
+                w.y = dot(c1, c1);
+                w.z = dot(c2, c2);
+                w.w = dot(c3, c3);
+
+                // Noise contribution should decay to zero before they cross the simplex boundary.
+                // Usually r^2 is 0.5 or 0.6;
+                // 0.5 ensures continuity but 0.6 increases the visual quality for the application
+                // where discontinuity isn't noticeable.
+                w = max(0.6 - w, 0.);
+
+                // Noise contribution from each point.
+                vec4 nc;
+                nc.x = dot(hash(s), c0);
+                nc.y = dot(hash(s + offset1), c1);
+                nc.z = dot(hash(s + offset2), c2);
+                nc.w = dot(hash(s + offset3), c3);
+
+                nc *= w*w*w*w;
+
+                // Add all the noise contributions.
+                // Should multiply by the possible max contribution to adjust the range in [-1,1].
+                return dot(vec4(32.), nc);
+            }
+            """
+    }
+}

packages/SystemUI/src/com/android/systemui/surfaceeffects/turbulencenoise/TurbulenceNoiseAnimationConfig.kt

@@ -0,0 +1,67 @@
+/*
+ * 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.systemui.surfaceeffects.turbulencenoise
+
+import android.graphics.BlendMode
+import android.graphics.Color
+
+/** Turbulence noise animation configuration. */
+data class TurbulenceNoiseAnimationConfig(
+    /** The number of grids that is used to generate noise. */
+    val gridCount: Float = DEFAULT_NOISE_GRID_COUNT,
+
+    /** Multiplier for the noise luma matte. Increase this for brighter effects. */
+    val luminosityMultiplier: Float = DEFAULT_LUMINOSITY_MULTIPLIER,
+
+    /**
+     * Noise move speed variables.
+     *
+     * Its sign determines the direction; magnitude determines the speed. <ul>
+     * ```
+     *     <li> [noiseMoveSpeedX] positive: right to left; negative: left to right.
+     *     <li> [noiseMoveSpeedY] positive: bottom to top; negative: top to bottom.
+     *     <li> [noiseMoveSpeedZ] its sign doesn't matter much, as it moves in Z direction. Use it
+     *     to add turbulence in place.
+     * ```
+     * </ul>
+     */
+    val noiseMoveSpeedX: Float = 0f,
+    val noiseMoveSpeedY: Float = 0f,
+    val noiseMoveSpeedZ: Float = DEFAULT_NOISE_SPEED_Z,
+
+    /** Color of the effect. */
+    var color: Int = DEFAULT_COLOR,
+    /** Background color of the effect. */
+    val backgroundColor: Int = DEFAULT_BACKGROUND_COLOR,
+    val opacity: Int = DEFAULT_OPACITY,
+    val width: Float = 0f,
+    val height: Float = 0f,
+    val duration: Float = DEFAULT_NOISE_DURATION_IN_MILLIS,
+    val pixelDensity: Float = 1f,
+    val blendMode: BlendMode = DEFAULT_BLEND_MODE,
+    val onAnimationEnd: Runnable? = null
+) {
+    companion object {
+        const val DEFAULT_NOISE_DURATION_IN_MILLIS = 7500F
+        const val DEFAULT_LUMINOSITY_MULTIPLIER = 1f
+        const val DEFAULT_NOISE_GRID_COUNT = 1.2f
+        const val DEFAULT_NOISE_SPEED_Z = 0.3f
+        const val DEFAULT_OPACITY = 150 // full opacity is 255.
+        const val DEFAULT_COLOR = Color.WHITE
+        const val DEFAULT_BACKGROUND_COLOR = Color.BLACK
+        val DEFAULT_BLEND_MODE = BlendMode.SRC_OVER
+    }
+}

packages/SystemUI/src/com/android/systemui/surfaceeffects/turbulencenoise/TurbulenceNoiseController.kt

@@ -0,0 +1,30 @@
+/*
+ * 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.systemui.surfaceeffects.turbulencenoise
+
+/** A controller that plays [TurbulenceNoiseView]. */
+class TurbulenceNoiseController(private val turbulenceNoiseView: TurbulenceNoiseView) {
+    /** Updates the color of the noise. */
+    fun updateNoiseColor(color: Int) {
+        turbulenceNoiseView.updateColor(color)
+    }
+
+    // TODO: add cancel and/ or pause once design requirements become clear.
+    /** Plays [TurbulenceNoiseView] with the given config. */
+    fun play(turbulenceNoiseAnimationConfig: TurbulenceNoiseAnimationConfig) {
+        turbulenceNoiseView.play(turbulenceNoiseAnimationConfig)
+    }
+}

packages/SystemUI/src/com/android/systemui/surfaceeffects/turbulencenoise/TurbulenceNoiseShader.kt

@@ -0,0 +1,121 @@
+/*
+ * 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.systemui.surfaceeffects.turbulencenoise
+
+import android.graphics.RuntimeShader
+import com.android.systemui.surfaceeffects.shaderutil.ShaderUtilLibrary
+import java.lang.Float.max
+
+/** Shader that renders turbulence simplex noise, with no octave. */
+class TurbulenceNoiseShader : RuntimeShader(TURBULENCE_NOISE_SHADER) {
+    // language=AGSL
+    companion object {
+        private const val UNIFORMS =
+            """
+            uniform float in_gridNum;
+            uniform vec3 in_noiseMove;
+            uniform vec2 in_size;
+            uniform float in_aspectRatio;
+            uniform float in_opacity;
+            uniform float in_pixelDensity;
+            layout(color) uniform vec4 in_color;
+            layout(color) uniform vec4 in_backgroundColor;
+        """
+
+        private const val SHADER_LIB =
+            """
+            float getLuminosity(vec3 c) {
+                return 0.3*c.r + 0.59*c.g + 0.11*c.b;
+            }
+
+            vec3 maskLuminosity(vec3 dest, float lum) {
+                dest.rgb *= vec3(lum);
+                // Clip back into the legal range
+                dest = clamp(dest, vec3(0.), vec3(1.0));
+                return dest;
+            }
+        """
+
+        private const val MAIN_SHADER =
+            """
+            vec4 main(vec2 p) {
+                vec2 uv = p / in_size.xy;
+                uv.x *= in_aspectRatio;
+
+                vec3 noiseP = vec3(uv + in_noiseMove.xy, in_noiseMove.z) * in_gridNum;
+                float luma = simplex3d(noiseP) * in_opacity;
+                vec3 mask = maskLuminosity(in_color.rgb, luma);
+                vec3 color = in_backgroundColor.rgb + mask * 0.6;
+
+                // Add dither with triangle distribution to avoid color banding. Ok to dither in the
+                // shader here as we are in gamma space.
+                float dither = triangleNoise(p * in_pixelDensity) / 255.;
+
+                // The result color should be pre-multiplied, i.e. [R*A, G*A, B*A, A], thus need to
+                // multiply rgb with a to get the correct result.
+                color = (color + dither.rrr) * in_color.a;
+                return vec4(color, in_color.a);
+            }
+        """
+
+        private const val TURBULENCE_NOISE_SHADER =
+            ShaderUtilLibrary.SHADER_LIB + UNIFORMS + SHADER_LIB + MAIN_SHADER
+    }
+
+    /** Sets the number of grid for generating noise. */
+    fun setGridCount(gridNumber: Float = 1.0f) {
+        setFloatUniform("in_gridNum", gridNumber)
+    }
+
+    /**
+     * Sets the pixel density of the screen.
+     *
+     * Used it for noise dithering.
+     */
+    fun setPixelDensity(pixelDensity: Float) {
+        setFloatUniform("in_pixelDensity", pixelDensity)
+    }
+
+    /** Sets the noise color of the effect. */
+    fun setColor(color: Int) {
+        setColorUniform("in_color", color)
+    }
+
+    /** Sets the background color of the effect. */
+    fun setBackgroundColor(color: Int) {
+        setColorUniform("in_backgroundColor", color)
+    }
+
+    /**
+     * Sets the opacity to achieve fade in/ out of the animation.
+     *
+     * Expected value range is [1, 0].
+     */
+    fun setOpacity(opacity: Float) {
+        setFloatUniform("in_opacity", opacity)
+    }
+
+    /** Sets the size of the shader. */
+    fun setSize(width: Float, height: Float) {
+        setFloatUniform("in_size", width, height)
+        setFloatUniform("in_aspectRatio", width / max(height, 0.001f))
+    }
+
+    /** Sets noise move speed in x, y, and z direction. */
+    fun setNoiseMove(x: Float, y: Float, z: Float) {
+        setFloatUniform("in_noiseMove", x, y, z)
+    }
+}

packages/SystemUI/src/com/android/systemui/surfaceeffects/turbulencenoise/TurbulenceNoiseView.kt

@@ -0,0 +1,123 @@
+/*
+ * 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.systemui.surfaceeffects.turbulencenoise
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.animation.ValueAnimator
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.util.AttributeSet
+import android.view.View
+import androidx.annotation.VisibleForTesting
+import androidx.core.graphics.ColorUtils
+import java.util.Random
+import kotlin.math.sin
+
+/** View that renders turbulence noise effect. */
+class TurbulenceNoiseView(context: Context?, attrs: AttributeSet?) : View(context, attrs) {
+
+    companion object {
+        private const val MS_TO_SEC = 0.001f
+        private const val TWO_PI = Math.PI.toFloat() * 2f
+    }
+
+    @VisibleForTesting val turbulenceNoiseShader = TurbulenceNoiseShader()
+    private val paint = Paint().apply { this.shader = turbulenceNoiseShader }
+    private val random = Random()
+    private val animator: ValueAnimator = ValueAnimator.ofFloat(0f, 1f)
+    private var config: TurbulenceNoiseAnimationConfig? = null
+
+    val isPlaying: Boolean
+        get() = animator.isRunning
+
+    init {
+        // Only visible during the animation.
+        visibility = INVISIBLE
+    }
+
+    /** Updates the color during the animation. No-op if there's no animation playing. */
+    fun updateColor(color: Int) {
+        config?.let {
+            it.color = color
+            applyConfig(it)
+        }
+    }
+
+    override fun onDraw(canvas: Canvas?) {
+        if (canvas == null || !canvas.isHardwareAccelerated) {
+            // Drawing with the turbulence noise shader requires hardware acceleration, so skip
+            // if it's unsupported.
+            return
+        }
+
+        canvas.drawPaint(paint)
+    }
+
+    internal fun play(config: TurbulenceNoiseAnimationConfig) {
+        if (isPlaying) {
+            return // Ignore if the animation is playing.
+        }
+        visibility = VISIBLE
+        applyConfig(config)
+
+        // Add random offset to avoid same patterned noise.
+        val offsetX = random.nextFloat()
+        val offsetY = random.nextFloat()
+
+        animator.duration = config.duration.toLong()
+        animator.addUpdateListener { updateListener ->
+            val timeInSec = updateListener.currentPlayTime * MS_TO_SEC
+            // Remap [0,1] to [0, 2*PI]
+            val progress = TWO_PI * updateListener.animatedValue as Float
+
+            turbulenceNoiseShader.setNoiseMove(
+                offsetX + timeInSec * config.noiseMoveSpeedX,
+                offsetY + timeInSec * config.noiseMoveSpeedY,
+                timeInSec * config.noiseMoveSpeedZ
+            )
+
+            // Fade in and out the noise as the animation progress.
+            // TODO: replace it with a better curve
+            turbulenceNoiseShader.setOpacity(sin(TWO_PI - progress) * config.luminosityMultiplier)
+
+            invalidate()
+        }
+
+        animator.addListener(
+            object : AnimatorListenerAdapter() {
+                override fun onAnimationEnd(animation: Animator) {
+                    visibility = INVISIBLE
+                    config.onAnimationEnd?.run()
+                }
+            }
+        )
+        animator.start()
+    }
+
+    private fun applyConfig(config: TurbulenceNoiseAnimationConfig) {
+        this.config = config
+        with(turbulenceNoiseShader) {
+            setGridCount(config.gridCount)
+            setColor(ColorUtils.setAlphaComponent(config.color, config.opacity))
+            setBackgroundColor(config.backgroundColor)
+            setSize(config.width, config.height)
+            setPixelDensity(config.pixelDensity)
+        }
+        paint.blendMode = config.blendMode
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/charging/WiredChargingRippleControllerTest.kt

@@ -24,7 +24,7 @@ import com.android.internal.logging.UiEventLogger
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.flags.FeatureFlags
 import com.android.systemui.flags.Flags
-import com.android.systemui.ripple.RippleView
+import com.android.systemui.surfaceeffects.ripple.RippleView
 import com.android.systemui.statusbar.commandline.CommandRegistry
 import com.android.systemui.statusbar.policy.BatteryController
 import com.android.systemui.statusbar.policy.ConfigurationController

packages/SystemUI/tests/src/com/android/systemui/media/controls/ui/ColorSchemeTransitionTest.kt

@@ -25,7 +25,8 @@ import com.android.systemui.SysuiTestCase
 import com.android.systemui.media.controls.models.GutsViewHolder
 import com.android.systemui.media.controls.models.player.MediaViewHolder
 import com.android.systemui.monet.ColorScheme
-import com.android.systemui.ripple.MultiRippleController
+import com.android.systemui.surfaceeffects.ripple.MultiRippleController
+import com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseController
 import junit.framework.Assert.assertEquals
 import org.junit.After
 import org.junit.Before
@@ -62,6 +63,7 @@ class ColorSchemeTransitionTest : SysuiTestCase() {
     @Mock private lateinit var mediaViewHolder: MediaViewHolder
     @Mock private lateinit var gutsViewHolder: GutsViewHolder
     @Mock private lateinit var multiRippleController: MultiRippleController
+    @Mock private lateinit var turbulenceNoiseController: TurbulenceNoiseController
 
     @JvmField @Rule val mockitoRule = MockitoJUnit.rule()
 
@@ -76,6 +78,7 @@ class ColorSchemeTransitionTest : SysuiTestCase() {
                 context,
                 mediaViewHolder,
                 multiRippleController,
+                turbulenceNoiseController,
                 animatingColorTransitionFactory
             )
 

packages/SystemUI/tests/src/com/android/systemui/media/controls/ui/MediaControlPanelTest.kt

@@ -78,9 +78,10 @@ import com.android.systemui.media.controls.util.MediaUiEventLogger
 import com.android.systemui.media.dialog.MediaOutputDialogFactory
 import com.android.systemui.plugins.ActivityStarter
 import com.android.systemui.plugins.FalsingManager
-import com.android.systemui.ripple.MultiRippleView
 import com.android.systemui.statusbar.NotificationLockscreenUserManager
 import com.android.systemui.statusbar.policy.KeyguardStateController
+import com.android.systemui.surfaceeffects.ripple.MultiRippleView
+import com.android.systemui.surfaceeffects.turbulencenoise.TurbulenceNoiseView
 import com.android.systemui.util.animation.TransitionLayout
 import com.android.systemui.util.concurrency.FakeExecutor
 import com.android.systemui.util.mockito.KotlinArgumentCaptor
@@ -178,6 +179,7 @@ public class MediaControlPanelTest : SysuiTestCase() {
     private lateinit var dismiss: FrameLayout
     private lateinit var dismissText: TextView
     private lateinit var multiRippleView: MultiRippleView
+    private lateinit var turbulenceNoiseView: TurbulenceNoiseView
 
     private lateinit var session: MediaSession
     private lateinit var device: MediaDeviceData
@@ -382,6 +384,7 @@ public class MediaControlPanelTest : SysuiTestCase() {
             }
 
         multiRippleView = MultiRippleView(context, null)
+        turbulenceNoiseView = TurbulenceNoiseView(context, null)
 
         whenever(viewHolder.player).thenReturn(view)
         whenever(viewHolder.appIcon).thenReturn(appIcon)
@@ -425,6 +428,7 @@ public class MediaControlPanelTest : SysuiTestCase() {
         whenever(viewHolder.actionsTopBarrier).thenReturn(actionsTopBarrier)
 
         whenever(viewHolder.multiRippleView).thenReturn(multiRippleView)
+        whenever(viewHolder.turbulenceNoiseView).thenReturn(turbulenceNoiseView)
     }
 
     /** Initialize elements for the recommendation view holder */

packages/SystemUI/tests/src/com/android/systemui/surfaceeffects/ripple/MultiRippleControllerTest.kt

@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.graphics.Color
 import android.testing.AndroidTestingRunner
 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
-import com.android.systemui.ripple.MultiRippleController.Companion.MAX_RIPPLE_NUMBER
+import com.android.systemui.surfaceeffects.ripple.MultiRippleController.Companion.MAX_RIPPLE_NUMBER
 import com.android.systemui.util.concurrency.FakeExecutor
 import com.android.systemui.util.time.FakeSystemClock
 import com.google.common.truth.Truth.assertThat

packages/SystemUI/tests/src/com/android/systemui/surfaceeffects/ripple/MultiRippleViewTest.kt

@@ -0,0 +1,58 @@
+/*
+ * 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.systemui.surfaceeffects.ripple
+
+import android.testing.AndroidTestingRunner
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.util.concurrency.FakeExecutor
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class MultiRippleViewTest : SysuiTestCase() {
+    private val fakeSystemClock = FakeSystemClock()
+    // FakeExecutor is needed to run animator.
+    private val fakeExecutor = FakeExecutor(fakeSystemClock)
+
+    @Test
+    fun onRippleFinishes_triggersRippleFinished() {
+        val multiRippleView = MultiRippleView(context, null)
+        val multiRippleController = MultiRippleController(multiRippleView)
+        val rippleAnimationConfig = RippleAnimationConfig(duration = 1000L)
+
+        var isTriggered = false
+        val listener =
+            object : MultiRippleView.Companion.RipplesFinishedListener {
+                override fun onRipplesFinish() {
+                    isTriggered = true
+                }
+            }
+        multiRippleView.addRipplesFinishedListener(listener)
+
+        fakeExecutor.execute {
+            val rippleAnimation = RippleAnimation(rippleAnimationConfig)
+            multiRippleController.play(rippleAnimation)
+
+            fakeSystemClock.advanceTime(rippleAnimationConfig.duration)
+
+            assertThat(isTriggered).isTrue()
+        }
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/surfaceeffects/ripple/RippleAnimationTest.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.graphics.Color
 import android.testing.AndroidTestingRunner

packages/SystemUI/tests/src/com/android/systemui/surfaceeffects/ripple/RippleViewTest.kt

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.systemui.ripple
+package com.android.systemui.surfaceeffects.ripple
 
 import android.testing.AndroidTestingRunner
 import androidx.test.filters.SmallTest
@@ -21,12 +21,10 @@ import com.android.systemui.SysuiTestCase
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
-import org.mockito.Mock
 
 @SmallTest
 @RunWith(AndroidTestingRunner::class)
 class RippleViewTest : SysuiTestCase() {
-    @Mock
     private lateinit var rippleView: RippleView
 
     @Before

packages/SystemUI/tests/src/com/android/systemui/surfaceeffects/turbulencenoise/TurbulenceNoiseControllerTest.kt

@@ -0,0 +1,71 @@
+/*
+ * 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.systemui.surfaceeffects.turbulencenoise
+
+import android.graphics.Color
+import android.testing.AndroidTestingRunner
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.util.concurrency.FakeExecutor
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class TurbulenceNoiseControllerTest : SysuiTestCase() {
+    private val fakeSystemClock = FakeSystemClock()
+    // FakeExecutor is needed to run animator.
+    private val fakeExecutor = FakeExecutor(fakeSystemClock)
+
+    @Test
+    fun play_playsTurbulenceNoise() {
+        val config = TurbulenceNoiseAnimationConfig(duration = 1000f)
+        val turbulenceNoiseView = TurbulenceNoiseView(context, null)
+
+        val turbulenceNoiseController = TurbulenceNoiseController(turbulenceNoiseView)
+
+        fakeExecutor.execute {
+            turbulenceNoiseController.play(config)
+
+            assertThat(turbulenceNoiseView.isPlaying).isTrue()
+
+            fakeSystemClock.advanceTime(config.duration.toLong())
+
+            assertThat(turbulenceNoiseView.isPlaying).isFalse()
+        }
+    }
+
+    @Test
+    fun updateColor_updatesCorrectColor() {
+        val config = TurbulenceNoiseAnimationConfig(duration = 1000f, color = Color.WHITE)
+        val turbulenceNoiseView = TurbulenceNoiseView(context, null)
+        val expectedColor = Color.RED
+
+        val turbulenceNoiseController = TurbulenceNoiseController(turbulenceNoiseView)
+
+        fakeExecutor.execute {
+            turbulenceNoiseController.play(config)
+
+            turbulenceNoiseView.updateColor(expectedColor)
+
+            fakeSystemClock.advanceTime(config.duration.toLong())
+
+            assertThat(config.color).isEqualTo(expectedColor)
+        }
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/surfaceeffects/turbulencenoise/TurbulenceNoiseViewTest.kt

@@ -0,0 +1,86 @@
+/*
+ * 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.systemui.surfaceeffects.turbulencenoise
+
+import android.testing.AndroidTestingRunner
+import android.view.View
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.util.concurrency.FakeExecutor
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class TurbulenceNoiseViewTest : SysuiTestCase() {
+
+    private val fakeSystemClock = FakeSystemClock()
+    // FakeExecutor is needed to run animator.
+    private val fakeExecutor = FakeExecutor(fakeSystemClock)
+
+    @Test
+    fun play_viewHasCorrectVisibility() {
+        val config = TurbulenceNoiseAnimationConfig(duration = 1000f)
+        val turbulenceNoiseView = TurbulenceNoiseView(context, null)
+
+        assertThat(turbulenceNoiseView.visibility).isEqualTo(View.INVISIBLE)
+
+        fakeExecutor.execute {
+            turbulenceNoiseView.play(config)
+
+            assertThat(turbulenceNoiseView.visibility).isEqualTo(View.VISIBLE)
+
+            fakeSystemClock.advanceTime(config.duration.toLong())
+
+            assertThat(turbulenceNoiseView.visibility).isEqualTo(View.INVISIBLE)
+        }
+    }
+
+    @Test
+    fun play_playsAnimation() {
+        val config = TurbulenceNoiseAnimationConfig(duration = 1000f)
+        val turbulenceNoiseView = TurbulenceNoiseView(context, null)
+
+        fakeExecutor.execute {
+            turbulenceNoiseView.play(config)
+
+            assertThat(turbulenceNoiseView.isPlaying).isTrue()
+        }
+    }
+
+    @Test
+    fun play_onEnd_triggersOnAnimationEnd() {
+        var animationEnd = false
+        val config =
+            TurbulenceNoiseAnimationConfig(
+                duration = 1000f,
+                onAnimationEnd = { animationEnd = true }
+            )
+        val turbulenceNoiseView = TurbulenceNoiseView(context, null)
+
+        fakeExecutor.execute {
+            turbulenceNoiseView.play(config)
+
+            assertThat(turbulenceNoiseView.isPlaying).isTrue()
+
+            fakeSystemClock.advanceTime(config.duration.toLong())
+
+            assertThat(animationEnd).isTrue()
+        }
+    }
+}