Class: MagickMetadata

Inherits:
Object
  • Object
show all
Defined in:
lib/magick-metadata.rb

Instance Method Summary collapse

Constructor Details

#initialize(file_path) ⇒ MagickMetadata

Returns a new instance of MagickMetadata.



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# File 'lib/magick-metadata.rb', line 3

def initialize( file_path )
    
  # Create attr_accessors for all keys in the data_map
  data_map.each do |k, v|
    create_attr v
  end

  # Get the data for the image using 'identify'
  format_str = data_map.keys.map{|k|"%#{k}"}.join('|')
  data = %x[identify -format "#{format_str}" #{file_path}].chomp

  # Parse the data response and assign it to the instance values
  data.split('|').each_with_index do |val, idx|
    attr_name = data_map.values[idx]
    instance_variable_set("@#{attr_name}", val)
  end

end

Instance Method Details

#compression_percent ⇒ Object 



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# File 'lib/magick-metadata.rb', line 40

def compression_percent
  @image_compression_quality.to_f if @image_compression_quality
end

#dimensions ⇒ Object 



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# File 'lib/magick-metadata.rb', line 28

def dimensions
  [@current_width_in_pixels.to_i, @current_height_in_pixels.to_i]
end

#file_size ⇒ Object 



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# File 'lib/magick-metadata.rb', line 32

def file_size
  @file_size_of_image.scan(/\d/).join().to_i if @file_size_of_image
end

#has_transparency? ⇒ Boolean

Helper methods

Returns:

  • (Boolean) 


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# File 'lib/magick-metadata.rb', line 24

def has_transparency?
  @image_transparency_channel_enabled == 'True'
end

#height ⇒ Object 



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# File 'lib/magick-metadata.rb', line 48

def height
  dimensions[1]
end

#resolution ⇒ Object 



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# File 'lib/magick-metadata.rb', line 36

def resolution
  @x_resolution_density.scan(/\d/).join().to_i if @x_resolution_density
end

#width ⇒ Object 



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# File 'lib/magick-metadata.rb', line 44

def width
  dimensions[0]
end