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Class: ActiveStorage::Analyzer::ImageAnalyzer

Relationships & Source Files
Namespace Children
Classes:
ImageMagick, Vips
Extension / Inclusion / Inheritance Descendants
Subclasses:
ImageMagick, Vips
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveSupport::Autoload, Analyzer
Instance Chain:
self, Analyzer
Inherits: Analyzer
  • ::Object
Defined in: activestorage/lib/active_storage/analyzer/image_analyzer.rb

Overview

Active Storage Image Analyzer

This is an abstract base class for image analyzers, which extract width and height from an image blob.

If the image contains EXIF data indicating its angle is 90 or 270 degrees, its width and height are swapped for convenience.

Example:

ActiveStorage::Analyzer::ImageAnalyzer::ImageMagick.new(blob).metadata
# => { width: 4104, height: 2736 }

Class Method Summary

::ActiveSupport::Autoload - Extended

autoload, autoload_at, autoload_under, eager_autoload, eager_load!

Instance Method Summary

Class Method Details

.accept?(blob) ⇒ Boolean

[ GitHub ] 

  


# File 'activestorage/lib/active_storage/analyzer/image_analyzer.rb', line 20



def self.accept?(blob)
  blob.image?
end


  







Instance Method Details



  

    #metadata  
  

  [ GitHub ]


  

  


# File 'activestorage/lib/active_storage/analyzer/image_analyzer.rb', line 24



def metadata
  read_image do |image|
    if rotated_image?(image)
      { width: image.height, height: image.width }
    else
      { width: image.width, height: image.height }
    end
  end
end