Class: Pdf::Reader::ExtractImages::Jpg

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/reader/extract_images/jpg.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stream) ⇒ Jpg

Returns a new instance of Jpg.



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# File 'lib/pdf/reader/extract_images/jpg.rb', line 7

def initialize(stream)
  @stream = stream
end

Instance Attribute Details

#stream ⇒ Object (readonly)

Returns the value of attribute stream.



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# File 'lib/pdf/reader/extract_images/jpg.rb', line 5

def stream
  @stream
end

Instance Method Details

#save(filename) ⇒ Object 



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# File 'lib/pdf/reader/extract_images/jpg.rb', line 11

def save(filename)
  w = stream.hash[:Width]
  h = stream.hash[:Height]
  blob = stream.data
  if stream.hash[:ColorSpace] == :DeviceCMYK && stream.data['Adobe']
    blob = Tempfile.open(['extract', filename]) { |tf|
      tf.binmode
      tf.write stream.data
      tf.flush
      ImageProcessing::MiniMagick.source(tf.path).negate.call.read
    }
  end
  { filename: filename, blob: blob, width: w, height: h }
end