1/*
2 * Copyright (c) 2023 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_0;
17
18import ohos.hdi.display.composer.v1_0.DisplayComposerType;
19
20[callback] interface IVBlankCallback {
21
22    /**
23     * @brief the callback to be IVBlankCallback when a vblank event occurs.
24     *
25     * @param sequence vblank sequence.
26     * @param ns Time when called.
27     *
28     * @return Returns <b>0</b> if the operation is successful; returns an error code defined
29     * in {@link DispErrCode} otherwise.
30     * @since 4.0
31     * @version 1.0
32     */
33    OnVBlank([in] unsigned int sequence, [in] unsigned long ns);
34}