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Size: 898 Bytes
Versions: 14
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Stored size: 898 Bytes
Contents
module Riiif
module Region
module Imagemagick
# decodes requested cooridnates into an imagemagick crop directive
class PercentageDecoder
def initialize(image_info, x, y, width, height)
@image_info = image_info
@x = x
@y = y
@width = width
@height = height
end
# Imagemagick can't do percentage offsets, so we have to calculate it
# @return [String] a region for imagemagick to decode
# (appropriate for passing to the -crop parameter)
def decode
"#{@width}%x#{@height}+#{offset_x}+#{offset_y}"
end
private
def offset_x
(@image_info.width * Integer(@x).to_f / 100).round
end
def offset_y
(@image_info.height * Integer(@y).to_f / 100).round
end
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems