(ns laser.rasterize

   (:use [rlm

 	 image-utils

 	 map-utils]

 	[clojure.contrib

 	 [str-utils :only [str-join re-gsub]]

 	 [seq :only [indexed]]

 	 [math]

 	 [def]

 	 ])

   (:import [ij ImagePlus IJ]))

 

 ;(import '(java.io File))

 ;(import '(org.apache.commons.io FileUtils))

 ;(import '(javax.imageio ImageIO) )

 

 

 (set! *print-length* 20)

 (def feed 120)

 (def  dpi [500, 500])

 

 (def paramaters {:x-dpi 500 :y-dpi 500 :margin 0 :x-offset 0 :y-offset 0})

 

 ;;; this process is divided into two tasks,

 ;;; creating the raster g-code, which sweeps back and forth

 ;;; and creating the gmask, which turns the laser on and off.

 

 

 ;;; we'll be using frame-hashes, which represent picutres as

 ;;; a 3D vector field over 2D space, with the vectors representing

 ;;; the rgb values at that particular point. 

 

 (defn select-row

   "returns a frame hash that is just a single line at the chosen y"

   [y window]

   (reduce  

    (fn [old-map number]

      (let [pixel (get window [number y] nil)]

        (if-not (nil? pixel)

 	 (into old-map {[number y] pixel})

 	 old-map)))

    {}

    (range (width window))))

 

 (defn make-rows [pic]

   (map (partial sort #(< (first %1) (first %2)))

        (partition-by last

 		     (sort (fn [[x1 y1][x2 y2]] (> y2 y1))

 			   (map first (filter-vals (partial = black) pic))))))

 

 ;;; generate rastering g-code

 

 (defn raster-preamble []

   (str-join \newline ["M63 P0\nG61" (str "F" feed) "M101" "M3 S1\n"]))

 

 (defn raster-epilogue []

   (str-join \newline ["M63 P0" "M5" "M2\n"]))

 

 (defn raster-comment

   "wrap a statement in PARENTHENSIS to make it a comment in gcode.

    parenthesis themselves aren't allowed in comments.

    Oh the humanity!!"

   [string]

   (str "(" (re-gsub #"[()]" "" string) ")"))

 

 (defn rows

   "creates a sequence of one dimensional vector fields which

    represent the rows of a picture"

   [pic]

   (let [non-empty-rows (apply sorted-set (map (comp last first) pic))]

     (pmap (fn [n] (select-row n pic)) non-empty-rows)))

     

   

 

 

 

 (defn row->gcode [{:keys [x-dpi y-dpi margin x-offset y-offset]} row]

   (let [pixels (keys row)

 	x2 0

 	[_ y2] (first pixels)

 	[_ y1] (first pixels)

 	x1 533]

 

 					;(let [ordered-row

 ;	(sort-map-by (fn [[x1 _] [x2 _]] (> x2 x1)) row)]

     

     (let [;[x1 y1] (last (keys ordered-row))

 	  ;[x2 y2] (first (keys ordered-row))

 	  [x1 y1 x2 y2] (if (odd? y1) [x2 y2 x1 y1] [x1 y1 x2 y2])]

       

       (str (format "G0 X%.3f Y%.3f\n"

 		   (float (* x1 (/ x-dpi)))

 		   (float (* y1 (/ y-dpi))))

 	   

 	   (format "G1 X%.3f Y%.3f\n"

 		   (float (* x2 (/ x-dpi)))

 		   (float (* y2 (/ y-dpi))))))))

 

 

 (defn pic->gcode [paramaters pic]

   (reduce (fn [gcode current-height]

 	    (let [current-row (select-row current-height pic)]

 	      (if-not (empty? current-row)

 		(let [new-code (row->gcode paramaters current-row)] 

 		  (println new-code)

 		  (str gcode new-code))

 		gcode)))

 	  ""

 	  (range (height pic))))

 

 

 ;(defn pic->gcode [paramaters pic]

   

 

 (defn generate-gcode [pic]

   (str (raster-preamble)

        (row->gcode paramaters pic)

        (raster-epilogue)))

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 (defn gather-row [row]

   (let [base    [[(first (first row)) (first (first row))]]]

 					;  (println base)

     (reduce 

      (fn colapse [collection new-n]

        

        (let [collection (apply vector collection)

 	     prevoius (last (last collection))

 	     range-start (first (last collection))]

 					;       (println new-n)

 					;       (println prevoius)

 					;       (println range-start)

 	 (if (<= new-n (+ prevoius 1))

 	   (do ;(println "join")

 					;(println (butlast collection)) 

 	     (conj (apply vector (butlast collection))

 		   (vector range-start new-n)))

 	   (conj collection  (vector new-n new-n)))))

      

      base

      (map first row))))

 

 

 

 

 (defn row->gmask [[x-dpi y-dpi] forward? row]

   (let [start (float (* (/ x-dpi) (first (first

 					  (if forward?

 					  (reverse row) row)))))]

     (let [preamble (if-not forward?

 		     (format "0 0 0 %.3f\n" start)

 		     (format "0 0 1 %.3f\n" start))

 	  body

 	  (for [[x y]

 		(if forward?

 		  (reverse (gather-row row))

 		  (gather-row row))]

 	    (let [x (float (* x (/ x-dpi)))

 		  y (float (* y (/ x-dpi)))]

 ;;		  x (+ x 0.159)];; shift by a small margin.

 	      (if-not forward?

 		(str (format "0 0 1 %.3f\n" x)

 		     (format "0 1 1 %.3f\n" y))

 		

 		(str (format "0 0 0 %.3f\n" y)

 		     (format "0 1 0 %.3f\n" x)))))]

 

       (str preamble (str-join "" body)))))

 

 

 (defn generate-gmask [pic]

   (str "1 0 0 0\n"

        (str-join "" (map (fn [[index row]]

 			   (row->gmask dpi (even? index) row))

 			 (indexed (make-rows pic))))))

 

 

 

 

 ;;;; testing

 

 (defn generate-files [pic]

     (println "made-image")

     (spit "/home/r/kevin/out.ngc" (generate-gcode pic))

     (println "/home/r/kevin/out.ngc")

     (spit "/home/r/kevin/out.gmask" (generate-gmask pic))

     (println "/home/r/kevin/out.gmask")

     pic)

 

 (defn update-state []

   (def sing "/home/r/kevin/sing.png")

   (def pic (frame-hash (ImagePlus. sing)))  

   (def pic (b&w pic))

   (def pic (filter-vals (partial = black) pic)))

 

 (defn compare-gen-fn

   ([n f cmp]

   (let [theirs (re-split #"\n" (slurp cmp))

 	ours   (re-split #"\n" (f pic))]

     (println (format "%1$-25s%2$s" "OURS" "THEIRS"))

     (println "_______________________________________")

     (dorun (map (fn [[us them]] (println

 			     (format "%1$-25s%2$s" us them)))

 			     (take n (partition 2 (interleave  ours theirs))))))))

 

 (defn compare-gcode

   ([] (compare-gcode 25))

   ([n] (compare-gen-fn n generate-gcode "/home/r/kevin/reference.ngc")))

 

 (defn compare-gmask

   ([] compare-gmask 25)

   ([n]  (compare-gen-fn n generate-gmask "/home/r/kevin/reference.gmask")))