# File lib/compass/sass_extensions/sprites/engines.rb, line 6 def initialize(width, height, images) @width, @height, @images = width, height, images @canvas = nil end
# File lib/compass/sass_extensions/sprites/engines.rb, line 11 def construct_sprite raise ::Compass::Error, "You must implement construct_sprite" end
# File lib/compass/sass_extensions/sprites/engines.rb, line 15 def save(filename) raise ::Compass::Error, "You must implement save(filename)" end