Class WebThumbnailer
In: lib/cacher/webthumbnailer.rb
Parent: Cacher

Methods

cachedir   mangle   new   thumbnail  

Constants

SIZES = { 'normal' => '128x128', 'large' => '256x256', 'tiny' => '32x24'
SIZE_NAMES = SIZES.invert
CacheDirs = [File.join(ENV['HOME'] || '/tmp', '.thumbnails'), '/tmp/thumbnails']

Attributes

sizename  [RW] 
x  [RW] 
y  [RW] 

Public Class methods

new(size)

[Source]

    # File lib/cacher/webthumbnailer.rb, line 16
16:         def initialize(size)
17:                 if !/x/.match(size)
18:                         size = SIZES[size]
19:                 end
20:                 self.x, self.y = size.split('x').map { |e| e.to_i }
21:                 self.sizename = SIZE_NAMES[size] || size
22:                 super(CacheDirs)
23:                 FileUtils.mkdir_p(cachedir)
24:         end

Public Instance methods

cachedir()

[Source]

    # File lib/cacher/webthumbnailer.rb, line 30
30:         def cachedir
31:                 File.join(super, sizename) 
32:         end
mangle(filename)

[Source]

    # File lib/cacher/webthumbnailer.rb, line 26
26:         def mangle(filename)
27:                 super('file://' + filename) + '.jpg'
28:         end
thumbnail(file)

[Source]

    # File lib/cacher/webthumbnailer.rb, line 34
34:         def thumbnail(file)
35:                 cached(file) do
36:                         jpeg = File.open(file) do |f|
37:                                 f.read(4) == 'JFIF'
38:                         end
39:                         if jpeg      
40:                                 e = Epeg.new(file)
41:                                 ox,oy = e.size
42:                                 scale = [1.0 / [(ox / x), 1].max, 1.0 / [(oy / y), 1].max].min
43:                                 dx = (ox * scale).floor
44:                                 dy = (oy * scale).floor
45:                                 e.set_output_size(dx,dy)
46:                                 e.finish
47:                         else
48:                                 img = Magick::Image.read(file).first
49:                                 img.change_geometry!("#{x}x#{y}") { |cols, rows| img.thumbnail! cols, rows }
50:                                 img.format = 'JPEG'
51:                                 img.to_blob
52:                         end
53:                 end
54:         end

[Validate]