class ChunkyPNG::Chunk::ImageData

def self.combine_chunks(data_chunks)
  Zlib::Inflate.inflate(data_chunks.map(&:content).join(''))
end

def self.split_in_chunks(data, chunk_size = 2147483647)
  streamdata = Zlib::Deflate.deflate(data)
  # TODO: Split long streamdata over multiple chunks
  [ ChunkyPNG::Chunk::ImageData.new('IDAT', streamdata) ]
end