jpegrecompress.rb in image_optim-0.28.0

- old
+ new

@@ -24,10 +24,24 @@
       QUALITY_OPTION =
       option(:quality, 3, "JPEG quality preset: #{quality_names_desc}") do |v|
         OptionHelpers.limit_with_range(v.to_i, 0...QUALITY_NAMES.length)
       end
 
+      METHOD_OPTION =
+      option(:method, 'ssim', 'Comparison Metric: '\
+          '`mpe` - Mean pixel error, '\
+          '`ssim` - Structural similarity, '\
+          '`ms-ssim` - Multi-scale structural similarity (slow!), '\
+          '`smallfry` - Linear-weighted BBCQ-like (may be patented)') do |v, opt_def|
+        if %w[mpe ssim ms-ssim smallfry].include? v
+          v
+        else
+          warn "Unknown method for jpegrecompress: #{v}"
+          opt_def.default
+        end
+      end
+
       def used_bins
         [:'jpeg-recompress']
       end
 
       # Run early as lossy worker
@@ -36,9 +50,10 @@
       end
 
       def optimize(src, dst)
         args = %W[
           --quality #{QUALITY_NAMES[quality]}
+          --method #{method}
           --no-copy
           #{src}
           #{dst}
         ]
         execute(:'jpeg-recompress', *args) && optimized?(src, dst)