1/* 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16package ohos.hdi.display.composer.v1_3; 17 18import ohos.hdi.display.composer.v1_1.IDisplayComposer; 19import ohos.hdi.display.composer.v1_2.IDisplayComposer; 20import ohos.hdi.display.composer.v1_0.DisplayComposerType; 21import ohos.hdi.display.composer.v1_3.DisplayComposerType; 22import ohos.hdi.display.composer.v1_3.IHwcEventCallback; 23sequenceable OHOS.HDI.Display.HdifdParcelable; 24 25interface IDisplayComposer extends ohos.hdi.display.composer.v1_2.IDisplayComposer { 26 /** 27 * @brief Registers the callback to be invoked when the environment changes. 28 * 29 * @param cb Indicates the instance used to notify the graphics service of an environment change event occurred. 30 * 31 * @return Returns <b>0</b> if the operation is successful; returns an error code defined 32 * in {@link DispErrCode} otherwise. 33 * @since 6.0 34 * @version 1.0 35 */ 36 RegHwcEventCallback([in] IHwcEventCallback cb); 37} 38