Fix UDFPS enrollment shadow

Add padding to the layoutparams which the UdfpsView is created with.
When drawing in UdfpsAnimationView, translate by the padded amount.

Fixes: 179083247
Test: manual
Change-Id: I2f9d677809ce03702edd68710c8e20e38c1777e9

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsAnimation.java

@@ -52,4 +52,18 @@ public abstract class UdfpsAnimation extends Drawable {
     public void setAlpha(int alpha) {
         mFingerprintDrawable.setAlpha(alpha);
     }
+
+    /**
+     * @return The amount of padding that's needed on each side of the sensor, in pixels.
+     */
+    public int getPaddingX() {
+        return 0;
+    }
+
+    /**
+     * @return The amount of padding that's needed on each side of the sensor, in pixels.
+     */
+    public int getPaddingY() {
+        return 0;
+    }
 }

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsAnimationEnroll.java

@@ -70,6 +70,9 @@ public class UdfpsAnimationEnroll extends UdfpsAnimation {
 
     @Override
     public void draw(@NonNull Canvas canvas) {
+        canvas.save();
+        canvas.translate(getPaddingX(), getPaddingY());
+
         final boolean isNightMode = (mContext.getResources().getConfiguration().uiMode
                 & Configuration.UI_MODE_NIGHT_YES) != 0;
         if (!isNightMode) {
@@ -78,6 +81,18 @@ public class UdfpsAnimationEnroll extends UdfpsAnimation {
             }
         }
         mFingerprintDrawable.draw(canvas);
+
+        canvas.restore();
+    }
+
+    @Override
+    public int getPaddingX() {
+        return (int) Math.ceil(SHADOW_RADIUS);
+    }
+
+    @Override
+    public int getPaddingY() {
+        return (int) Math.ceil(SHADOW_RADIUS);
     }
 
     @Override

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java

@@ -242,12 +242,15 @@ public class UdfpsController implements DozeReceiver, HbmCallback {
         }
     }
 
-    private WindowManager.LayoutParams computeLayoutParams() {
+    private WindowManager.LayoutParams computeLayoutParams(@Nullable UdfpsAnimation animation) {
+        final int paddingX = animation != null ? animation.getPaddingX() : 0;
+        final int paddingY = animation != null ? animation.getPaddingY() : 0;
+
         // Default dimensions assume portrait mode.
-        mCoreLayoutParams.x = mSensorProps.sensorLocationX - mSensorProps.sensorRadius;
-        mCoreLayoutParams.y = mSensorProps.sensorLocationY - mSensorProps.sensorRadius;
-        mCoreLayoutParams.height = 2 * mSensorProps.sensorRadius;
-        mCoreLayoutParams.width = 2 * mSensorProps.sensorRadius;
+        mCoreLayoutParams.x = mSensorProps.sensorLocationX - mSensorProps.sensorRadius - paddingX;
+        mCoreLayoutParams.y = mSensorProps.sensorLocationY - mSensorProps.sensorRadius - paddingY;
+        mCoreLayoutParams.height = 2 * mSensorProps.sensorRadius + 2 * paddingX;
+        mCoreLayoutParams.width = 2 * mSensorProps.sensorRadius + 2 * paddingY;
 
         Point p = new Point();
         // Gets the size based on the current rotation of the display.
@@ -289,8 +292,9 @@ public class UdfpsController implements DozeReceiver, HbmCallback {
             if (!mIsOverlayShowing) {
                 try {
                     Log.v(TAG, "showUdfpsOverlay | adding window");
-                    mView.setUdfpsAnimation(getUdfpsAnimationForReason(reason));
-                    mWindowManager.addView(mView, computeLayoutParams());
+                    final UdfpsAnimation animation = getUdfpsAnimationForReason(reason);
+                    mView.setUdfpsAnimation(animation);
+                    mWindowManager.addView(mView, computeLayoutParams(animation));
                     mView.setOnTouchListener(mOnTouchListener);
                     mIsOverlayShowing = true;
                 } catch (RuntimeException e) {

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsView.java

@@ -56,7 +56,6 @@ public class UdfpsView extends FrameLayout implements DozeReceiver, UdfpsIllumin
     @NonNull private final RectF mSensorRect;
     @NonNull private final Paint mDebugTextPaint;
 
-
     // Used to obtain the sensor location.
     @NonNull private FingerprintSensorPropertiesInternal mSensorProps;