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Contents
require 'image_optim/worker'
class ImageOptim
class Worker
# http://www.ijg.org/
#
# Uses jpegtran through jpegrescan if enabled, jpegrescan is vendored with
# this gem
class Jpegtran < Worker
COPY_CHUNKS_OPTION =
option(:copy_chunks, false, 'Copy all chunks'){ |v| !!v }
PROGRESSIVE_OPTION =
option(:progressive, true, 'Create progressive JPEG file'){ |v| !!v }
JPEGRESCAN_OPTION =
option(:jpegrescan, false, 'Use jpegtran through jpegrescan, '\
'ignore progressive option'){ |v| !!v }
def used_bins
jpegrescan ? [:jpegtran, :jpegrescan] : [:jpegtran]
end
def optimize(src, dst)
if jpegrescan
args = %W[
#{src}
#{dst}
]
args.unshift '-s' unless copy_chunks
resolve_bin!(:jpegtran)
execute(:jpegrescan, *args) && optimized?(src, dst)
else
args = %W[
-optimize
-outfile #{dst}
#{src}
]
args.unshift '-copy', (copy_chunks ? 'all' : 'none')
args.unshift '-progressive' if progressive
execute(:jpegtran, *args) && optimized?(src, dst)
end
end
end
end
end
Version data entries
16 entries across 16 versions & 2 rubygems