class Tsumetogi::DiffStrategies::LowMemory
Public Class Methods
new(config = nil)
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Calls superclass method
Tsumetogi::DiffStrategies::Base::new
# File lib/tsumetogi/diff_strategies/low_memory.rb, line 10 def initialize(config = nil) super end
Public Instance Methods
after_match()
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# File lib/tsumetogi/diff_strategies/low_memory.rb, line 35 def after_match FileUtils.remove_entry_secure @tmp_dir end
before_match()
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# File lib/tsumetogi/diff_strategies/low_memory.rb, line 31 def before_match @tmp_dir = Dir.mktmpdir end
difference(reference, target)
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# File lib/tsumetogi/diff_strategies/low_memory.rb, line 14 def difference(reference, target) diff_path = File.join(@tmp_dir, "diff.png") diff_cmd = ["composite", "-compose", "difference"] diff_cmd << reference diff_cmd << target diff_cmd << diff_path system *diff_cmd id_cmd = ["identify"] id_cmd += ["-format", "%[mean]"] id_cmd << diff_path diff = `#{id_cmd.join(" ")}` diff.chomp.to_f / 65535 end