| /* |
| * Copyright 2022 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.camera.previewview.surface; |
| |
| import android.view.Surface; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.RequiresApi; |
| import androidx.annotation.RestrictTo; |
| |
| /** |
| * A interface implemented by the application to provide a {@link Surface} for preview. |
| * |
| * <p> This interface is implemented by the application to provide a {@link Surface}. This |
| * will be called by application when it needs a Surface for Preview. It also signals when the |
| * Surface is no longer in use. |
| * |
| * @hide |
| */ |
| @RequiresApi(21) |
| @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) |
| public interface PreviewSurfaceProvider { |
| /** |
| * Called when a new {@link Surface} has been requested by the camera. |
| * |
| * <p>This is called every time a new surface is required to keep the preview running. |
| * The camera may repeatedly request surfaces, but only a single request will be active at a |
| * time. |
| * |
| * @param request the request for a surface which contains the requirements of the |
| * surface and methods for completing the request. |
| */ |
| void onSurfaceRequested(@NonNull PreviewSurfaceRequest request); |
| } |
