1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17 package com.android.wm.shell.common; 18 19 import android.view.SurfaceControl; 20 21 /** 22 * Helpers for handling surface. 23 */ 24 public class SurfaceUtils { 25 /** Creates a dim layer above host surface. */ makeDimLayer(SurfaceControl.Transaction t, SurfaceControl host, String name)26 public static SurfaceControl makeDimLayer(SurfaceControl.Transaction t, SurfaceControl host, 27 String name) { 28 final SurfaceControl dimLayer = makeColorLayer(host, name); 29 t.setLayer(dimLayer, Integer.MAX_VALUE).setColor(dimLayer, new float[]{0f, 0f, 0f}); 30 return dimLayer; 31 } 32 33 /** Creates a color layer for host surface. */ makeColorLayer(SurfaceControl host, String name)34 public static SurfaceControl makeColorLayer(SurfaceControl host, String name) { 35 return new SurfaceControl.Builder() 36 .setParent(host) 37 .setColorLayer() 38 .setName(name) 39 .setCallsite("SurfaceUtils.makeColorLayer") 40 .build(); 41 } 42 } 43