snippet.rb

# General
output_style = :expanded
relative_assets = true
line_comments = false

project_path = File.dirname(__FILE__) + "/"
utils_dir = project_path + "utils/"

# Sass Paths
http_path = "/"
http_javascripts_path = http_path + "assets/js/"
http_stylesheets_path = http_path + "assets/css/"
http_images_path = http_stylesheets_path + "img/"
http_fonts_path = http_stylesheets_path + "fonts/"

# Sass Directories (relative to this config.rb file)
javascripts_dir = "../assets/js/"
css_dir = "../assets/css/"
sass_dir = css_dir + "src/"
images_dir = css_dir + "img/"

# Quantize 8-bit sprites
on_sprite_saved do |file|
  if !is_32bit?(file) && ENV["QUANTIZE_IMG"] == "y"
    quantize(file, utils_dir + "pngquant/pngquant-mac")
  end
  if ENV["OPTIMIZE_IMG"] == "y"
    optimize(file, utils_dir + "pngout/pngout-mac")
  end
end

# Methods
def is_32bit?(file)
  File.basename(file).match(/^png(24|32)/)
end

def quantize(file, binary)
  png8_file = file.sub(/\.png/, "-fs8.png")
  system binary + " " + file
  sleep 2
  system "mv -f " + png8_file + " " + file
  growl("Sprite: " + File.basename(file) + " quantized")
end

def optimize(file, binary)
  system binary + " " + file + " -y"
  growl("Sprite: " + File.basename(file) + " optimized")
end