| src | The resource to read the data from. | 
| size | Size in bytes of the data to be retrieved from the ComputeBuffer. | 
| offset | Offset in bytes in the ComputeBuffer. | 
| mipIndex | The index of the mipmap to be fetched. | 
| dstFormat | The target TextureFormat of the data. Conversion will happen automatically if format is different from the format stored on GPU. | 
| x | Starting X coordinate in pixels of the Texture data to be fetched. | 
| y | Starting Y coordinate in pixels of the Texture data to be fetched. | 
| z | Start Z coordinate in pixels for the Texture3D being fetched. Index of Start layer for TextureCube, Texture2DArray and TextureCubeArray being fetched. | 
| depth | Depth in pixels for Texture3D being fetched. Number of layers for TextureCube, TextureArray and TextureCubeArray. | 
| width | Width in pixels of the Texture data to be fetched. | 
| height | Height in pixels of the Texture data to be fetched. | 
| callback | A delegate System.Action called once the request is fullfilled. The done request is passed as parameter to the System.Action. | 
Adds an asynchonous GPU readback request command to the command buffer.
See Also: AsyncGPUReadback.Request.