/usr/lib/ruby/vendor_ruby/pdf/reader/resource_methods.rb is in ruby-pdf-reader 1.3.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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module PDF
class Reader
# mixin for common methods in Page and FormXobjects
#
module ResourceMethods
# Returns a Hash of color spaces that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def color_spaces
@objects.deref!(resources[:ColorSpace]) || {}
end
# Returns a Hash of fonts that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def fonts
@objects.deref!(resources[:Font]) || {}
end
# Returns a Hash of external graphic states that are available to this
# page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def graphic_states
@objects.deref!(resources[:ExtGState]) || {}
end
# Returns a Hash of patterns that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def patterns
@objects.deref!(resources[:Pattern]) || {}
end
# Returns an Array of procedure sets that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def procedure_sets
@objects.deref!(resources[:ProcSet]) || []
end
# Returns a Hash of properties sets that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def properties
@objects.deref!(resources[:Properties]) || {}
end
# Returns a Hash of shadings that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def shadings
@objects.deref!(resources[:Shading]) || {}
end
# Returns a Hash of XObjects that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
def xobjects
@objects.deref!(resources[:XObject]) || {}
end
end
end
end
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