class ChunkyPNG::Chunk::CompressedText

def self.read(type, content)
  keyword, compression, value = content.unpack('Z*Ca*')
  raise "Compression method #{compression.inspect} not supported!" unless compression == ChunkyPNG::COMPRESSION_DEFAULT
  new(keyword, Zlib::Inflate.inflate(value))
end

def content
  [keyword, ChunkyPNG::COMPRESSION_DEFAULT, Zlib::Deflate.deflate(value)].pack('Z*Ca*')
end

def initialize(keyword, value)
  super('tEXt')
  @keyword, @value = keyword, value
end