Added interpolated blur animation for status bar

Added an increase of the main animation at the beginning so after that
the animation it's not that intense. WIP

Bug: 152988192
Test: Visual
Change-Id: Iffb99e4e1f79e50d315b7c95c213cc5a985e8607

2 files changed, 7 insertions, 1 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/Interpolators.java b/packages/SystemUI/src/com/android/systemui/Interpolators.java
index 6923079dd5c4..13d6a9bef266 100644
--- a/packages/SystemUI/src/com/android/systemui/Interpolators.java
+++ b/packages/SystemUI/src/com/android/systemui/Interpolators.java
@@ -49,6 +49,8 @@ public class Interpolators {
     public static final Interpolator CUSTOM_40_40 = new PathInterpolator(0.4f, 0f, 0.6f, 1f);
     public static final Interpolator HEADS_UP_APPEAR = new HeadsUpAppearInterpolator();
     public static final Interpolator ICON_OVERSHOT = new PathInterpolator(0.4f, 0f, 0.2f, 1.4f);
+    public static final Interpolator SHADE_ANIMATION =
+            new PathInterpolator(0.6f, 0.02f, 0.4f, 0.98f);
     public static final Interpolator ICON_OVERSHOT_LESS
             = new PathInterpolator(0.4f, 0f, 0.2f, 1.1f);
     public static final Interpolator PANEL_CLOSE_ACCELERATED
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShadeDepthController.kt b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShadeDepthController.kt
index d7322a04ba49..4c24ea821879 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShadeDepthController.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationShadeDepthController.kt
@@ -21,6 +21,7 @@ import android.animation.AnimatorListenerAdapter
 import android.animation.ValueAnimator
 import android.app.WallpaperManager
 import android.util.Log
+import android.util.MathUtils
 import android.view.Choreographer
 import android.view.View
 import androidx.annotation.VisibleForTesting
@@ -185,7 +186,10 @@ class NotificationShadeDepthController @Inject constructor(
     private fun updateShadeBlur() {
         var newBlur = 0
         if (statusBarStateController.state == StatusBarState.SHADE) {
-            newBlur = blurUtils.blurRadiusOfRatio(shadeExpansion)
+            val animatedBlur =
+                    Interpolators.SHADE_ANIMATION.getInterpolation(
+                            MathUtils.constrain(shadeExpansion / 0.15f, 0f, 1f))
+            newBlur = blurUtils.blurRadiusOfRatio(0.35f * animatedBlur + 0.65f * shadeExpansion)
         }
 
         shadeSpring.animateTo(newBlur)