class ChunkyPNG::Chunk::End

The End (IEND) chunk indicates the last chunk of a PNG stream. It does not contain any data.

Public Class Methods

new() click to toggle source
Calls superclass method ChunkyPNG::Chunk::Base::new
    # File lib/chunky_png/chunk.rb
163 def initialize
164   super('IEND')
165 end
read(type, content) click to toggle source

Reads the END chunk. It will check if the content is empty. @param type [String] The four character chunk type indicator (=

"IEND").

@param content [String] The content read from the chunk. Should be

empty.

@return [ChunkyPNG::Chunk::End] The new End chunk instance. @raise [ChunkyPNG::ExpectationFailed] Raises an exception if the content was not empty.

    # File lib/chunky_png/chunk.rb
174 def self.read(type, content)
175   raise ExpectationFailed, 'The IEND chunk should be empty!' if content.bytesize > 0
176   self.new
177 end

Public Instance Methods

content() click to toggle source

Returns an empty string, because this chunk should always be empty. @return [“”] An empty string.

    # File lib/chunky_png/chunk.rb
181 def content
182   ChunkyPNG::Datastream.empty_bytearray
183 end