Module: ActiveStorage::Blurhash::Analyzing

Included in:
ActiveStorage::Blurhash::Analyzer::ImageMagick, ActiveStorage::Blurhash::Analyzer::Vips
Defined in:
lib/active_storage/blurhash/analyzing.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#thumbnail ⇒ Object

Returns the value of attribute thumbnail.



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# File 'lib/active_storage/blurhash/analyzing.rb', line 6

def thumbnail
  @thumbnail
end

Instance Method Details

#blurhash ⇒ Object 



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# File 'lib/active_storage/blurhash/analyzing.rb', line 16

def blurhash
  {
    blurhash: ::Blurhash.encode(
      thumbnail.width,
      thumbnail.height,
      thumbnail.pixels
    )
  }
end

#build_thumbnail(image) ⇒ Object 



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# File 'lib/active_storage/blurhash/analyzing.rb', line 26

def build_thumbnail(image)
  # we scale down the image for faster blurhash processing
  @thumbnail ||= "ActiveStorage::Blurhash::Thumbnail::#{processor}".constantize.new(image)
end

#metadata ⇒ Object 



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# File 'lib/active_storage/blurhash/analyzing.rb', line 8

def metadata
  # we could also re-implement #metadata, so that the image is only read once, but it's much less DRY
  read_image do |image|
    build_thumbnail(image)
    super.merge blurhash
  end
end