class `ActiveStorage::Analyzer::ImageAnalyzer`

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 }

Inherits From

class ActiveStorage::Analyzer

Public class methods

`accept?(blob)`

Source code GitHub

# File activestorage/lib/active_storage/analyzer/image_analyzer.rb, line 15
def self.accept?(blob)
  blob.image?
end

Public instance methods

`metadata()`

Source code GitHub

# File activestorage/lib/active_storage/analyzer/image_analyzer.rb, line 19
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

Definition files

activestorage/lib/active_storage/analyzer/image_analyzer.rb

class ActiveStorage::Analyzer::ImageAnalyzer