Graphics.frame_rate = 60
class FPS_Display
 
  #===CONFIGURATION===#
    TOGGLE = Input::F5
  #=END CONFIGURATION=#
 
  attr_accessor :frame_count
 
        def initialize
   
                # Create Sprite to display FPS
                @counter = Sprite.new
   
                # Position Sprite
                @counter.x, @counter.z = 500, 99999999
   
                # Create / Setup Bitmap
                @counter.bitmap = Bitmap.new(200, 24)
                #@counter.bitmap.fill_rect(0, 0, 200, 24, Color.new(0, 0, 0))
                @counter.bitmap.font.size = 15
                @counter.bitmap.font.name = '나눔고딕'
                @counter.bitmap.font.bold = true
                #@counter.bitmap.draw_text(100, 0, 100, 24, ' fps')
   
                # Get Target Frame Rate
                @frame_rate = Graphics.frame_rate
   
                # Set Start time
                @start = nil
                @on = true
                @frame_count = 0
                @fps = @frame_rate
                refresh
   
        end
       
        def refresh
   
                # Clear FPS
                #@counter.bitmap.fill_rect(0, 0, 100, 24, Color.new(0,0,0))
                @counter.bitmap.clear
                # Redraw Current FPS
                @counter.bitmap.font.color = Color.new(0,0,0,120)
                @counter.bitmap.draw_text(100-1, 0, 100, 24, ' fps')
                @counter.bitmap.draw_text(100-1, -1, 100, 24, ' fps')
                @counter.bitmap.draw_text(100-1, +1, 100, 24, ' fps')
                @counter.bitmap.draw_text(100+1, -1, 100, 24, ' fps')
                @counter.bitmap.draw_text(100+1, 1, 100, 24, ' fps')
                @counter.bitmap.draw_text(100+1, 0, 100, 24, ' fps')
                @counter.bitmap.draw_text(100, 1, 100, 24, ' fps')
                @counter.bitmap.draw_text(100, -1, 100, 24, ' fps')
                @counter.bitmap.draw_text(-1, 0, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(1, 0, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(0, 1, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(1, -1, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(1, -1, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(1, 1, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(-1, -1, 100, 24, @fps.to_s ,2)
                @counter.bitmap.draw_text(-1, 1, 100, 24, @fps.to_s ,2)
                @counter.bitmap.font.color = Color.new(255,255,255)
                 @counter.bitmap.draw_text(100, 0, 100, 24, ' fps')
                @counter.bitmap.draw_text(0, 0, 100, 24, @fps.to_s ,2)#+ " / " +
                      #@frame_rate.to_s, 2)
   
        end
               
        def update
   
                # If F5 is pressed, toggle FPS display
                if Input.trigger?(TOGGLE)
                        @on = !@on
                        @counter.visible = @on
                end
   
               (@frame_count = 0; return) if !@on
               if @start == nil
                 @start = Time.now
                 @frame_count = 0
               end
               # Get time elapsed in seconds
               cur_time = Time.now - @start
   
               if cur_time >= 1
               # Get Frames per second
               fps = (@frame_count / cur_time).to_i
   
               # If during check interval and the Frame Rate has changed
               if @fps != fps
                  @fps = fps
                  refresh
                end
                @start = nil
        end
   
        end
       
        def dispose
   
                @counter.dispose; @counter = nil
   
        end
 
end

module Graphics
 
  class << self
   
    alias :new_upd_fps :update unless method_defined?(:new_upd_fps)
   
  end
 
  def self.update
   
    self.new_upd_fps
    $fps = FPS_Display.new if $fps == nil
    #return if $fps == nil
   
    $fps.frame_count += 1
    $fps.update
   
  end
 
end