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Contents
module PictureTag
module Srcsets
# Creates a srcset in the "(filename) (pixel_ratio)x" format.
# Example: "img.jpg 1x, img2.jpg 1.5x, img3.jpg 2x"
class PixelRatio < Basic
private
def widths
PictureTag.preset['pixel_ratios'].collect do |p|
p * PictureTag.preset['base_width']
end
end
def build_srcset_entry(file)
# We have to recalculate the pixel ratio after verifying our source
# image is large enough.
pixel_ratio = (
file.width.to_f / PictureTag.preset['base_width']
).round(2)
"#{file.uri} #{pixel_ratio}x"
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems