Module documentation{{#invoke:ImageRatio|ratio|Filename.jpg}}
This returns the ratio of width to height (w/h) for an image. Defaults to returning 1 if the image doesn't exist, this avoids divide by 0 errors in templates that use it.
local p={}function p.ratio(frame)local file = frame.args[1] and mw.title.new('File:' .. mw.uri.decode(mw.ustring.gsub(frame.args[1],'%|.*$',''), 'WIKI'))file = file and file.filelocal w = tonumber(file.width) or 1local h = tonumber(file.height) or 1 local r = w/h or 1return rendreturn p