Decodes encoded and writes the result to output.
public void Decode(ReadOnlyMemory<byte> encoded, IBufferWriter<byte> output, FilterContext context)
The data to decode: the stream's data, or the previous filter's output in a chain. Never empty.
Where to write the decoded bytes.
The filter's parameters (its DecodeParms dictionary), the stream's dictionary, the means to resolve references and
decode other streams, and the diagnostics sink.
ISO 32000-2 §7.4.8 and §8.9.3: rows of width x components bytes, top to bottom, the colour transform applied. Nothing is written when the data has no decodable frame or is larger than MaxDecodedLength.