lib/image_optim/worker/pngcrush.rb in image_optim-0.19.1 vs lib/image_optim/worker/pngcrush.rb in image_optim-0.20.0

@@ -17,28 +17,38 @@
 
       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 }
+
       # Always run first [-1]
       def run_order
         -1
       end
 
       def optimize(src, dst)
-        args = %W[
+        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}
         ]
-        chunks.each do |chunk|
-          args.unshift '-rem', chunk
-        end
-        args.unshift '-fix' if fix
-        args.unshift '-brute' if brute
+
         execute(:pngcrush, *args) && optimized?(src, dst)
       end
     end
   end
 end