Class: Thumbnail

Inherits:
Object
  • Object
show all
Defined in:
lib/thumbnail.rb

Instance Method Summary collapse

Constructor Details

#initialize(id, tmpfile) ⇒ Thumbnail

Returns a new instance of Thumbnail.



4
5
6
7
8
9
 
# File 'lib/thumbnail.rb', line 4

def initialize id, tmpfile
  @id = id
  @images = Magick::ImageList.new(tmpfile.path)

  @filename_parts = [@id]
end

Instance Method Details

#add_overlay ⇒ Object 



34
35
36
37
38
39
40
41
42
43
 
# File 'lib/thumbnail.rb', line 34

def add_overlay
  @filename_parts << "overlay"

  filename = File.join(Dir.pwd, "assets","overlay.png")
  # Fallback to asset packaged with gem
  filename = GEMDIR.join("assets", "overlay.png") unless File.exists? filename
  @images << Magick::ImageList.new(filename)[0]

  self
end

#images ⇒ Object 



11
12
13
 
# File 'lib/thumbnail.rb', line 11

def images
  @images
end

#uri_path ⇒ Object 



15
16
17
 
# File 'lib/thumbnail.rb', line 15

def uri_path
  File.join("/", "thumbs", container_dir, filename)
end

#write(suffix = nil) ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/thumbnail.rb', line 19

def write suffix = nil
  final = @images.shift
  @images.each do |image|
    final = final.composite(image, Magick::CenterGravity, Magick::OverCompositeOp)
  end

  extra_parts = [suffix] unless suffix.nil?
  final.write(root.join(container_dir, filename))
  #it should be easier and cleaner with flatten: however: no idea how to CenterGravity that
  # see http://stackoverflow.com/questions/15724387/how-to-flatten-rmagick-images-and-center-them
  #@images.flatten_images.write(File.join("public", "thumbs", parts.join("_") + ".png"))

  self
end