class Wraith::CropImages

Attributes

wraith[R]

Public Class Methods

new(config) click to toggle source
# File lib/wraith/crop.rb, line 11
def initialize(config)
  @wraith = Wraith::Wraith.new(config)
end

Public Instance Methods

crop_if_necessary(base, compare) click to toggle source
# File lib/wraith/crop.rb, line 23
def crop_if_necessary(base, compare)
    base_width     = image_dimensions(base)[0]
    base_height    = image_dimensions(base)[1]
    compare_width  = image_dimensions(compare)[0]
    compare_height = image_dimensions(compare)[1]

    if base_height == compare_height and base_width == compare_width
      logger.debug "Both images are exactly #{base_width}x#{base_height} - no cropping required. (#{base}, #{compare})"
      return true
    end

    max_width  = [base_width, compare_width].max
    max_height = [base_height, compare_height].max

    logger.debug "Cropping both images to #{max_width}x#{max_height}. (#{base}, #{compare})"
    [base, compare].each do |image_to_crop|
      run_crop_task(image_to_crop, max_height, max_width)
    end
end
crop_images() click to toggle source
# File lib/wraith/crop.rb, line 15
def crop_images
  files = Dir.glob("#{wraith.directory}/*/*.png").sort

  Parallel.each(files.each_slice(2), :in_processes => Parallel.processor_count) do |base, compare|
    crop_if_necessary base, compare
  end
end
image_dimensions(image) click to toggle source
# File lib/wraith/crop.rb, line 47
def image_dimensions(image)
  ImageSize.new(File.open(image, "rb").read).size
end
run_crop_task(crop, height, width) click to toggle source
# File lib/wraith/crop.rb, line 43
def run_crop_task(crop, height, width)
  `convert #{crop.shellescape} -background none -extent #{width}x#{height} #{crop.shellescape}`
end