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Contents
require 'image_optim/worker'
class ImageOptim
class Worker
# http://pmt.sourceforge.net/pngcrush/
class Pngcrush < Worker
CHUNKS_OPTION =
option(:chunks, :alla, Array, 'List of chunks to remove or '\
'`:alla` - all except tRNS/transparency or '\
'`:allb` - all except tRNS and gAMA/gamma') do |v|
Array(v).map(&:to_s)
end
FIX_OPTION =
option(:fix, false, 'Fix otherwise fatal conditions '\
'such as bad CRCs'){ |v| !!v }
BRUTE_OPTION =
option(:brute, false, 'Brute force try all methods, '\
'very time-consuming and generally not worthwhile'){ |v| !!v }
BLACKEN_OPTION =
option(:blacken, true, 'Blacken fully transparent pixels'){ |v| !!v }
def run_order
-6
end
def optimize(src, dst)
flags = %w[
-reduce
-cc
-q
]
chunks.each do |chunk|
flags.push '-rem', chunk
end
flags.push '-fix' if fix
flags.push '-brute' if brute
if resolve_bin!(:pngcrush).version >= '1.7.38'
flags.push '-blacken' if blacken
end
args = flags + %W[
--
#{src}
#{dst}
]
execute(:pngcrush, *args) && optimized?(src, dst)
end
end
end
end
Version data entries
15 entries across 15 versions & 3 rubygems