module Sass::Script::Functions
Sass
implementation of the Noisy jquery plugin: github.com/DanielRapp/Noisy by @philippbosch gist.github.com/1021332
Public Instance Methods
background_noise(kwargs = {})
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# File lib/sassy_noise/sass_extensions.rb, line 9 def background_noise(kwargs = {}) opts = {} Sass::Util.map_hash({ "intensity" => [0..1, "", :Number, Sass::Script::Number.new(0.5) ], "opacity" => [0..1, "", :Number, Sass::Script::Number.new(0.08)], "size" => [1..512, "px", :Number, Sass::Script::Number.new(200) ], "monochrome" => [[true, false], "", :Bool, Sass::Script::Bool.new(false) ] }) do |name, (range, units, type, default)| if val = kwargs.delete(name) assert_type val, type, name if range && !range.include?(val.value) raise ArgumentError.new("$#{name}: Amount #{val} must be between #{range.first}#{units} and #{range.last}#{units}") end else val = default end opts[name] = val end image = ChunkyPNG::Image.new(opts["size"].to_i, opts["size"].to_i) for i in (0..(opts["intensity"].to_s.to_f * (opts["size"].to_i**2))) x = rand(opts["size"].to_i) y = rand(opts["size"].to_i) r = rand(255) a = rand(255 * opts["opacity"].to_s.to_f) color = opts["monochrome"] ? ChunkyPNG::Color.rgba(r, r, r, a) : ChunkyPNG::Color.rgba(r, rand(255), rand(255), a) image.set_pixel(x, y, color) end data = Base64.encode64(image.to_blob).gsub("\n", "") Sass::Script::String.new("url('data:image/png;base64,#{data}')") end