Class: ImageOptim::Worker::Jpegoptim

Inherits:
ImageOptim::Worker show all
Defined in:
lib/image_optim/worker/jpegoptim.rb

Overview

www.kokkonen.net/tjko/projects.html

Constant Summary collapse

ALLOW_LOSSY_OPTION = 
option(:allow_lossy, false, 'Allow limiting maximum quality'){ |v| !!v }
STRIP_OPTION = 
option(:strip, :all, Array, 'List of markers to strip: ' \
                            '`:com`, ' \
                            '`:exif`, ' \
                            '`:iptc`, ' \
                            '`:icc`, ' \
                            '`:xmp`, ' \
                            '`:none` or ' \
                            '`:all`') do |v|
  values = Array(v).map(&:to_s)
  known_values = %w[com exif iptc icc xmp none all]
  unknown_values = values - known_values
  unless unknown_values.empty?
    warn "Unknown markers for jpegoptim: #{unknown_values.join(', ')}"
  end
  values & known_values
end
MAX_QUALITY_OPTION = 
option(:max_quality, 100, 'Maximum image quality factor ' \
                          '`0`..`100`, ignored in default/lossless mode') do |v, opt_def|
  if allow_lossy
    OptionHelpers.limit_with_range(v.to_i, 0..100)
  else
    if v != opt_def.default
      warn "#{self.class.bin_sym} #{opt_def.name} #{v} ignored " \
           'in lossless mode'
    end
    opt_def.default
  end
end

Instance Method Summary collapse

Methods inherited from ImageOptim::Worker

#image_formats, #initialize, #inspect, #optimized?, #options, #resolve_used_bins!, #used_bins

Methods included from ClassMethods

#bin_sym, #create_all, #create_all_by_format, extended, #inherited, #klasses, #option, #option_definitions

Constructor Details

This class inherits a constructor from ImageOptim::Worker

Instance Method Details

#optimize(src, dst, options = {}) ⇒ Object 



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# File 'lib/image_optim/worker/jpegoptim.rb', line 50

def optimize(src, dst, options = {})
  src.copy(dst)
  args = %W[
    --quiet
    --
    #{dst}
  ]
  strip.each do |strip_marker|
    args.unshift "--strip-#{strip_marker}"
  end
  args.unshift "--max=#{max_quality}" if max_quality < 100
  execute(:jpegoptim, args, options) && optimized?(src, dst)
end

#run_order ⇒ Object

Run earlier if max_quality is less than 100



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# File 'lib/image_optim/worker/jpegoptim.rb', line 46

def run_order
  max_quality < 100 ? -1 : 0
end