允许异步读回 GPU 资源。
此类用于将资源数据从 GPU 复制到 CPU 而不会出现任何卡顿（GPU 或 CPU），但会增加几帧延迟。
另请参阅：AsyncGPUReadbackRequest。
See Also: SystemInfo.supportsAsyncGPUReadback, SystemInfo.supportsAsyncGPUReadback.
| Request | 从 GPU 资源中异步获取数据。 |
| RequestAsync | 从 GPU 资源中异步获取数据。 |
| RequestIntoNativeArray | Retrieves data asynchronously from a GPU Texture resource. |
| RequestIntoNativeArrayAsync | Retrieves data asynchronously from a GPU Texture resource. |
| RequestIntoNativeSlice | Retrieves data asynchronously from a GPU Texture resource. |
| RequestIntoNativeSliceAsync | Retrieves data asynchronously from a GPU Texture resource. |
| WaitAllRequests | 等待每个请求完成。 |