shell/platform/android/io/flutter/view/TextureRegistry.java

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package io.flutter.view;

import android.graphics.SurfaceTexture;
import androidx.annotation.NonNull;

// TODO(mattcarroll): re-evalute docs in this class and add nullability annotations.
/**
 * Registry of backend textures used with a single {@link FlutterView} instance. Entries may be
 * embedded into the Flutter view using the <a
 * href="https://api.flutter.dev/flutter/widgets/Texture-class.html">Texture</a> widget.
 */
public interface TextureRegistry {
  /**
   * Creates and registers a SurfaceTexture managed by the Flutter engine.
   *
   * @return A SurfaceTextureEntry.
   */
  SurfaceTextureEntry createSurfaceTexture();

  /**
   * Registers a SurfaceTexture managed by the Flutter engine.
   *
   * @return A SurfaceTextureEntry.
   */
  SurfaceTextureEntry registerSurfaceTexture(@NonNull SurfaceTexture surfaceTexture);

  /** A registry entry for a managed SurfaceTexture. */
  interface SurfaceTextureEntry {
    /** @return The managed SurfaceTexture. */
    SurfaceTexture surfaceTexture();

    /** @return The identity of this SurfaceTexture. */
    long id();

    /** Deregisters and releases this SurfaceTexture. */
    void release();
  }
}