# File lib/graster.rb, line 70 def update_config @scale = @config[:dpi].map{|n| 1.0/n } @offset = @config[:offset] if @image 2.times {|i| @config[:tile_size][i] ||= @image.size[i]*@scale[i] } @tile_interval = 2.times.map {|i| @config[:tile_size][i] + @config[:tile_spacing][i] } end @on_range = Range.new Image.f_to_pix(@config[:on_range].first), Image.f_to_pix(@config[:on_range].last) end