Class: ImageOptim::Worker::Jhead
- Inherits:
-
ImageOptim::Worker
- Object
- ImageOptim::Worker
- ImageOptim::Worker::Jhead
- Defined in:
- lib/image_optim/worker/jhead.rb
Overview
www.sentex.net/~mwandel/jhead/
Jhead internally uses jpegtran which should be on path
Constant Summary collapse
- ORIENTED =
not top-left
2..8
Instance Attribute Summary
Attributes inherited from ImageOptim::Worker
Instance Method Summary collapse
-
#image_formats ⇒ Object
Works on jpegs.
- #optimize(src, dst) ⇒ Object
-
#run_order ⇒ Object
Run first, while exif is still present.
- #used_bins ⇒ Object
Methods inherited from ImageOptim::Worker
#initialize, #inspect, #optimized?, #options, #resolve_used_bins!
Methods included from ClassMethods
#bin_sym, #create_all, #create_all_by_format, extended, #inherited, #klasses, #option, #option_definitions
Constructor Details
This class inherits a constructor from ImageOptim::Worker
Instance Method Details
#image_formats ⇒ Object
Works on jpegs
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# File 'lib/image_optim/worker/jhead.rb', line 13 def image_formats [:jpeg] end |
#optimize(src, dst) ⇒ Object
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# File 'lib/image_optim/worker/jhead.rb', line 26 def optimize(src, dst) return false unless oriented?(src) src.copy(dst) args = %W[ -autorot #{dst} ] resolve_bin!(:jpegtran) execute(:jhead, *args) && dst.size? end |
#run_order ⇒ Object
Run first, while exif is still present
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# File 'lib/image_optim/worker/jhead.rb', line 18 def run_order -10 end |
#used_bins ⇒ Object
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# File 'lib/image_optim/worker/jhead.rb', line 22 def used_bins [:jhead, :jpegtran] end |