(def fb (mmap "/framebuffer"))
(def f (open "/framebuffer"))

(def draw-bg (fn c (do
    (let c (+ 1 c))
    (let b 1080)
    (while b
      (do
        (let b (- b 1))
        (let a 1920)
        (while a (do
          (let a (- a 1))
          (put32 fb (+ (* a 4) (* b 7680)) (* 0x1000 (* a (+ c b))))
        ))))
)))

(def mario  [00000000 00000000 00000000 0000f000 0000f000 0000f000 0000f000 0000f000 00000000 00000000 00000000 00000000
             00000000 00000000 0000f000 0000f000 0000f000 0000f000 0000f000 0000f000 0000f000 0000f000 0000f000 00000000
             00000000 00000000 00008800 00008800 00008800 0000ff00 0000ff00 00008800 0000ff00 00000000 00000000 00000000
             00000000 00008800 0000ff00 00008800 0000ff00 0000ff00 0000ff00 00008800 0000ff00 0000ff00 0000ff00 00000000
             00000000 00008800 0000ff00 00008800 00008800 0000ff00 0000ff00 0000ff00 00008800 0000ff00 0000ff00 0000ff00
             00000000 00008800 00008800 0000ff00 0000ff00 0000ff00 0000ff00 00008800 00008800 00008800 00008800 00000000
             00000000 00000000 00000000 0000ff00 0000ff00 0000ff00 0000ff00 0000ff00 0000ff00 0000ff00 00000000 00000000
             00000000 00000000 0000f000 0000f000 00f00000 0000f000 0000f000 0000f000 0000f000 00000000 00000000 00000000
             00000000 0000f000 0000f000 0000f000 00f00000 0000f000 0000f000 00f00000 0000f000 0000f000 0000f000 00000000
             0000f000 0000f000 0000f000 0000f000 00f00000 0000f000 00f00000 0000f000 0000f000 0000f000 0000f000 0000f000
             00ffff00 00ffff00 0000f000 00f00000 0000ff00 00f00000 00f00000 0000ff00 00f00000 0000f000 00ffff00 00ffff00
             00ffff00 00ffff00 00ffff00 00f00000 00f00000 00f00000 00f00000 00f00000 00f00000 00ffff00 00ffff00 00ffff00
             00ffff00 00ffff00 00f00000 00f00000 00f00000 00f00000 00f00000 00f00000 00f00000 00f00000 00ffff00 00ffff00
             00000000 00000000 00f00000 00f00000 00f00000 00000000 00000000 00f00000 00f00000 00f00000 00000000 00000000
             00000000 00008800 00008800 00008800 00000000 00000000 00000000 00000000 00008800 00008800 00008800 00000000
             00008800 00008800 00008800 00008800 00000000 00000000 00000000 00000000 00008800 00008800 00008800 00008800
             ])

(def clear  [00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
             00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000])

(def sprite mario)
             
(def sprite-w 12)

(def sprite-h 16)

(def line (fn x y sy (do
                        (let x1 (* 4 x))
                        (let x2 (- (* 4 (+ x sprite-w)) 4))
                        (let ofs (* y 7680))
                        (let x3 (* sy 48))
                        (while (lt x1 x2) (do
                          (let color (get32 sprite x3))
                          (put32 fb (+ ofs x1) color)
                          (let x1 (+ x1 4))
                          (let x3 (+ x3 4))
                        )) )))


(def blit (fn x y (do
                     (let y1 y)
                     (let y2 (+ y sprite-h))
                     (let sy 0)
                     (while (lt y1 y2) (do
                       (line x y1 sy)
                       (let y1 (+ y1 1))
                       (let sy (+ sy 1)) ))
                     )))


(def main (fn (while 1 (do
  (let offset-x 500)
  (let offset-y 500)
  (let dx 1)
  (let dy 1)
  (let tick 0)
  (while 1 (do
    (def sprite clear)
    (blit offset-x offset-y)
    
    (let offset-x (+ offset-x dx))
    (let offset-y (+ offset-y dy))

    (if (gt offset-x 1800) (let dx -1) 0)
    (if (gt offset-y 900)  (let dy -1) 0)
    (if (lt offset-x 100)  (let dx 1) 0)
    (if (lt offset-y 100)  (let dy 1) 0)

    ; draw marios
    (def sprite mario)
    (blit (+ offset-x 0) (+ offset-y 0))

    ; collect garbage
    (let tick (+ tick 1))
    (send f 0)
    (if (gt tick 100) (do
      (gc)
      (let tick 0)
      (print "gc!")) 0)
  ))
))))

(main)