Class: ThumbnailGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/piggy-core/thumbnail_generator.rb

Overview

Image processing abstraction as used in subclasses of ThumbnailPageGenerator.

Constant Summary collapse

PreThumbs = 
't_'

Instance Method Summary collapse

Constructor Details

#initialize(imageProcessor, options = PiggyOptions.new) ⇒ ThumbnailGenerator

Returns a new instance of ThumbnailGenerator.



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# File 'lib/piggy-core/thumbnail_generator.rb', line 13

def initialize(imageProcessor, options = PiggyOptions.new)
  @options = options
  @imageProcessor = imageProcessor
end

Instance Method Details

#generate(infos, progress) ⇒ Object 



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# File 'lib/piggy-core/thumbnail_generator.rb', line 31

def generate(infos, progress)
  src_files = infos.collect { |info| info.name_with_path }
  assert_files src_files
  progress.set_task("Processing images", src_files.size)
  infos.each do
    |info|
    inputFile = info.name_with_path
    progress.set_progress("Processing #{File.basename(inputFile)}", 1)
    img = @imageProcessor.load_image inputFile
    if(info.rotate?)
      @imageProcessor.rotate_image(img, info.rotation)
    end
    @imageProcessor.fit_image(img, @options.imageWidth, @options.imageHeight, 1, @options.widescreenWidth)
    @imageProcessor.save_image(img, outname_big(inputFile))
    @imageProcessor.fit_image(img, @options.thumbWidth, @options.thumbHeight)
    @imageProcessor.save_image(img, outname_small(inputFile))
    @imageProcessor.garbage_image(img)
  end
end

#outname_big(file) ⇒ Object 



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# File 'lib/piggy-core/thumbnail_generator.rb', line 23

def outname_big file
  return File.join(@outputDir, name_of(file) + extension_of(file))
end

#outname_small(file) ⇒ Object 



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# File 'lib/piggy-core/thumbnail_generator.rb', line 27

def outname_small file
  return File.join(@outputDir, PreThumbs + name_of(file) + extension_of(file))
end

#set_output_directory(dir) ⇒ Object 



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# File 'lib/piggy-core/thumbnail_generator.rb', line 18

def set_output_directory dir
  assert_dir dir
  @outputDir = dir
end