Module: Sass::Script::Functions

Defined in:
lib/rgbapng/functions.rb

Overview

Functions are modified from Benjamin Doherty’s first implementations: gist.github.com/377912 Modified to use the ChunkyPNG library rather than RMagick, and added flexibility to amend the path to which generated PNGs are saved.

Instance Method Summary collapse

Instance Method Details

#png_base64(c, px = 5) ⇒ Object 



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# File 'lib/rgbapng/functions.rb', line 29

def png_base64(c, px = 5)
  color = ChunkyPNG::Color.rgba(c.red, c.green, c.blue, (c.alpha * 100 * 2.55).round)
  image = ChunkyPNG::Image.new(px.to_i, px.to_i, color)
  data  = Base64.encode64(image.to_blob).gsub("\n", "")

  Sass::Script::String.new("url('data:image/png;base64,#{data}')")
end

#png_pixelate(c, dir = "rgbapng", px = 5) ⇒ Object 



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# File 'lib/rgbapng/functions.rb', line 11

def png_pixelate(c, dir = "rgbapng", px = 5)
  color = ChunkyPNG::Color.rgba(c.red, c.green, c.blue, (c.alpha * 100 * 2.55).round)
  image = ChunkyPNG::Image.new(px.to_i, px.to_i, color)
  dir   = dir.is_a?(Sass::Script::String) ? dir.value : dir
  file  = File.join(dir, ChunkyPNG::Color.to_hex(color).gsub(/^#/, "") + "-#{ px.to_s }.png")
  path = File.join(Compass.configuration.images_path, file)

  if !File.exists?(path) || options[:force]
    puts "Writing #{file}" unless options[:quiet]
    [Compass.configuration.images_path, File.join(Compass.configuration.images_path, dir)].each do |d|
      Dir.mkdir(d) unless File.exists?(d)
    end
    image.save(path)
  end

  Sass::Script::String.new(file)
end