Class: ActiveStorage::Analyzer::ImageAnalyzer::ImageMagick
Relationships & Source Files | |
Super Chains via Extension / Inclusion / Inheritance | |
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Instance Chain:
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Inherits: |
ActiveStorage::Analyzer::ImageAnalyzer
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Defined in: | activestorage/lib/active_storage/analyzer/image_analyzer/image_magick.rb |
Overview
This analyzer relies on the third-party MiniMagick gem. MiniMagick requires the ImageMagick system library.
Class Attribute Summary
::ActiveStorage::Analyzer
- Inherited
.analyze_later? | Implement this method in concrete subclasses. |
Class Method Summary
::ActiveStorage::Analyzer::ImageAnalyzer
- Inherited
::ActiveStorage::Analyzer
- Inherited
Instance Attribute Summary
::ActiveStorage::Analyzer
- Inherited
Instance Method Summary
- #read_image private
- #rotated_image?(image) ⇒ Boolean private
::ActiveStorage::Analyzer::ImageAnalyzer
- Inherited
::ActiveStorage::Analyzer
- Inherited
#metadata | Override this method in a concrete subclass. |
#download_blob_to_tempfile | Downloads the blob to a tempfile on disk. |
#instrument, #logger, #tmpdir |
Constructor Details
This class inherits a constructor from ActiveStorage::Analyzer
Class Method Details
.accept?(blob) ⇒ Boolean
# File 'activestorage/lib/active_storage/analyzer/image_analyzer/image_magick.rb', line 7
def self.accept?(blob) super && ActiveStorage.variant_processor == :mini_magick end
Instance Method Details
#read_image (private)
[ GitHub ]# File 'activestorage/lib/active_storage/analyzer/image_analyzer/image_magick.rb', line 12
def read_image begin require "mini_magick" rescue LoadError logger.info "Skipping image analysis because the mini_magick gem isn't installed" return {} end download_blob_to_tempfile do |file| image = instrument("mini_magick") do MiniMagick::Image.new(file.path) end if image.valid? yield image else logger.info "Skipping image analysis because ImageMagick doesn't support the file" {} end rescue MiniMagick::Error => error logger.error "Skipping image analysis due to an ImageMagick error: #{error.}" {} end end
#rotated_image?(image) ⇒ Boolean
(private)
# File 'activestorage/lib/active_storage/analyzer/image_analyzer/image_magick.rb', line 37
def rotated_image?(image) %w[ RightTop LeftBottom TopRight BottomLeft ].include?(image["%[orientation]"]) end