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Contents
module DragonflyLibvips
class Dimensions < Struct.new(:geometry, :orig_w, :orig_h)
def self.call(*args)
new(*args).call
end
def call
return OpenStruct.new(width: orig_w, height: orig_h, scale: 1) if do_not_resize_if_image_smaller_than_requested? || do_not_resize_if_image_larger_than_requested?
OpenStruct.new(width: width, height: height, scale: scale)
end
private
def width
if landscape?
dimensions_specified_by_width? ? dimensions.width : dimensions.height / aspect_ratio
else
dimensions_specified_by_height? ? dimensions.height / aspect_ratio : dimensions.width
end
end
def height
if landscape?
dimensions_specified_by_width? ? dimensions.width * aspect_ratio : dimensions.height
else
dimensions_specified_by_height? ? dimensions.height : dimensions.width * aspect_ratio
end
end
def scale
width.to_f / orig_w.to_f
end
def dimensions
w, h = geometry.scan(/\A(\d*)x(\d*)/).flatten.map(&:to_f)
OpenStruct.new(width: w, height: h)
end
def aspect_ratio
orig_h.to_f / orig_w
end
def dimensions_specified_by_width?
dimensions.width > 0
end
def dimensions_specified_by_height?
dimensions.height > 0
end
def landscape?
aspect_ratio <= 1.0
end
def portrait?
!landscape?
end
def do_not_resize_if_image_smaller_than_requested?
return false unless geometry.include? '>'
orig_w < width && orig_h < height
end
def do_not_resize_if_image_larger_than_requested?
return false unless geometry.include? '<'
orig_w > width && orig_h > height
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems