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