This object is used by RenderingDevice.
Optional override for the data format to return sampled values in. The corresponding RDTextureFormat must have had this added as a shareable format. The default value of RenderingDevice.DATA_FORMAT_MAX does not override the format.
The channel to sample when sampling the alpha channel.
The channel to sample when sampling the blue color channel.
The channel to sample when sampling the green color channel.
The channel to sample when sampling the red color channel.