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Contents
# frozen_string_literal: true
module ActiveStorage
# This analyzer relies on the third-party {ruby-vips}[https://github.com/libvips/ruby-vips] gem. Ruby-vips requires
# the {libvips}[https://libvips.github.io/libvips/] system library.
class Analyzer::ImageAnalyzer::Vips < Analyzer::ImageAnalyzer
def self.accept?(blob)
super && ActiveStorage.variant_processor == :vips
end
private
def read_image
download_blob_to_tempfile do |file|
require "ruby-vips"
image = instrument("vips") do
::Vips::Image.new_from_file(file.path, access: :sequential)
end
if valid_image?(image)
yield image
else
logger.info "Skipping image analysis because Vips doesn't support the file"
{}
end
end
rescue LoadError
logger.info "Skipping image analysis because the ruby-vips gem isn't installed"
{}
rescue ::Vips::Error => error
logger.error "Skipping image analysis due to an Vips error: #{error.message}"
{}
end
ROTATIONS = /Right-top|Left-bottom|Top-right|Bottom-left/
def rotated_image?(image)
ROTATIONS === image.get("exif-ifd0-Orientation")
rescue ::Vips::Error
false
end
def valid_image?(image)
image.avg
true
rescue ::Vips::Error
false
end
end
end
Version data entries
18 entries across 16 versions & 2 rubygems