Class: Mpngquant::Pngquant

Inherits:
Object
  • Object
show all
Defined in:
lib/mpngquant.rb

Class Method Summary collapse

Class Method Details

.optimize(infile:, force: nil, skip_if_larger: nil, ext: nil, quality: nil, speed: nil, nofs: nil, posterize: nil, strip: nil, verbose: nil) ⇒ Object 



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# File 'lib/mpngquant.rb', line 21

def optimize(infile:, force: nil, skip_if_larger: nil,
  ext: nil, quality: nil, speed: nil, nofs: nil,
  posterize: nil, strip: nil, verbose: nil)

  pngquant = "pngquant"
  unless quality.nil?
    parsed_quality = ["--quality", quality]
  end
  unless speed.nil?
    parsed_speed = ["--speed", Integer(speed).to_s]
  end
  parsed_infile = Pathname(infile).cleanpath.to_s unless infile.nil?
  File.open(parsed_infile) do |f|
    read_infile = f.read
    arg = [pngquant, parsed_quality, parsed_speed, "-"].select { |v| !v.nil? }.flatten!
    Open3.capture2(*arg, :stdin_data => read_infile)
  end
end

.supported? ⇒ True

Whether pngquant exists or not?

Returns:

  • (True) —

    “pngquant” exists,

    False

    “pngquant” NOT exists



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# File 'lib/mpngquant.rb', line 13

def supported?
  args = ["pngquant", "--version"]
  _, s = Open3.capture2(*args)
  s
rescue Errno::ENOENT
  false
end