2 * Copyright (C) 2018 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License
17 package com.android.internal.policy;
19 import android.content.res.Resources;
21 import com.android.internal.R;
24 * Utility functions for screen decorations used by both window manager and System UI.
26 public class ScreenDecorationsUtils {
29 * Corner radius that should be used on windows in order to cover the display.
30 * These values are expressed in pixels because they should not respect display or font
31 * scaling, this means that we don't have to reload them on config changes.
33 public static float getWindowCornerRadius(Resources resources) {
34 if (!supportsRoundedCornersOnWindows(resources)) {
38 // Radius that should be used in case top or bottom aren't defined.
39 float defaultRadius = resources.getDimension(R.dimen.rounded_corner_radius)
40 - resources.getDimension(R.dimen.rounded_corner_radius_adjustment);
42 float topRadius = resources.getDimension(R.dimen.rounded_corner_radius_top)
43 - resources.getDimension(R.dimen.rounded_corner_radius_top_adjustment);
44 if (topRadius == 0f) {
45 topRadius = defaultRadius;
47 float bottomRadius = resources.getDimension(R.dimen.rounded_corner_radius_bottom)
48 - resources.getDimension(R.dimen.rounded_corner_radius_bottom_adjustment);
49 if (bottomRadius == 0f) {
50 bottomRadius = defaultRadius;
53 // Always use the smallest radius to make sure the rounded corners will
54 // completely cover the display.
55 return Math.min(topRadius, bottomRadius);
59 * If live rounded corners are supported on windows.
61 public static boolean supportsRoundedCornersOnWindows(Resources resources) {
62 return resources.getBoolean(R.bool.config_supportsRoundedCornersOnWindows);