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class ActiveStorage::Analyzer::ImageAnalyzer

Parent:: ActiveStorage::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 }

Public Class Methods

accept?(blob) Show source

# File activestorage/lib/active_storage/analyzer/image_analyzer.rb, line 13
def self.accept?(blob)
  blob.image?
end

Public Instance Methods

metadata() Show source

# File activestorage/lib/active_storage/analyzer/image_analyzer.rb, line 17
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