Class: RMagickMetadata

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

Instance Method Summary collapse

Constructor Details

#initialize(file_path) ⇒ RMagickMetadata

Returns a new instance of RMagickMetadata.



5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/rmagick-metadata.rb', line 5

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 



42
43
44
 
# File 'lib/rmagick-metadata.rb', line 42

def compression_percent
  @image_compression_quality.to_f if @image_compression_quality
end

#dimensions ⇒ Object 



30
31
32
 
# File 'lib/rmagick-metadata.rb', line 30

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

#file_size ⇒ Object 



34
35
36
 
# File 'lib/rmagick-metadata.rb', line 34

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) 


26
27
28
 
# File 'lib/rmagick-metadata.rb', line 26

def has_transparency?
  @image_transparency_channel_enabled == 'True'
end

#height ⇒ Object 



50
51
52
 
# File 'lib/rmagick-metadata.rb', line 50

def height
  dimensions[1]
end

#resolution ⇒ Object 



38
39
40
 
# File 'lib/rmagick-metadata.rb', line 38

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

#width ⇒ Object 



46
47
48
 
# File 'lib/rmagick-metadata.rb', line 46

def width
  dimensions[0]
end