Class: ImageOptim::Worker::Pngquant

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

Overview

pngquant.org/

Constant Summary collapse

ALLOW_LOSSY_OPTION = 
option(:allow_lossy, false, 'Allow quality option'){ |v| !!v }
MAX_COLORS_OPTION = 
option(:max_colors, 256, 'Maximum number of colors to use') do |v|
  OptionHelpers.limit_with_range(v.to_i, 2..256)
end
QUALITY_OPTION = 
option(:quality, '`100..100`, `0..100` in lossy mode',
       NonNegativeIntegerRange, 'min..max - don\'t '\
   'save below min, use less colors below max (both in range `0..100`; '\
   'in yaml - `!ruby/range 0..100`), ignored in default/lossless '\
   'mode') do |v, opt_def|
  if allow_lossy
    if v == opt_def.default
      0..100
    else
      min = OptionHelpers.limit_with_range(v.begin, 0..100)
      min..OptionHelpers.limit_with_range(v.end, min..100)
    end
  else
    if v != opt_def.default
      warn "#{self.class.bin_sym} #{opt_def.name} #{v} ignored " \
          'in lossless mode'
    end
    100..100
  end
end
SPEED_OPTION = 
option(:speed, 3, 'speed/quality trade-off: '\
    '`1` - slow, '\
    '`3` - default, '\
    '`11` - fast & rough') do |v|
  OptionHelpers.limit_with_range(v.to_i, 1..11)
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) ⇒ Object 



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# File 'lib/image_optim/worker/pngquant.rb', line 53

def optimize(src, dst)
  args = %W[
    --quality=#{quality.begin}-#{quality.end}
    --speed=#{speed}
    --output=#{dst}
    --force
    #{max_colors}
    --
    #{src}
  ]
  execute(:pngquant, *args) && optimized?(src, dst)
end

#run_order ⇒ Object 



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# File 'lib/image_optim/worker/pngquant.rb', line 49

def run_order
  -2
end