; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
; 
; Random Dots script for GIMP 1.2
; Copyright (C) 2001 Iccii <iccii@hotmail.com>
; 
; --------------------------------------------------------------------
;   - Changelog -
; version 0.1  2001/06/21 iccii <iccii@hotmail.com>
;     - Initial relase
; version 0.1a 2001/06/22 iccii <iccii@hotmail.com>
;     - Add Square option
; version 0.1b 2001/09/26 iccii <iccii@hotmail.com>
;     - Add Linear option
; version 0.2 Raymond Ostertag 2004/09
;     - Ported to Gimp2
;     - Changed menu entry
; --------------------------------------------------------------------
; 
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
; 
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; 
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;

(define (script-fu-random-dots
		inSize		; 大きさ
		inOption	; 種類
		inRepeat	; 繰り返し
		inLimit		; 半径の制限
		inInvert	; 色を反転させるか？
	)

	;; inStart から inEnd までのランダムな数を返す
  (define (get-random-coordinate inStart inEnd)
	  (+ inStart (rand (- inEnd inStart))))

  (let* (
	 (count 0)
	 (old-fg (car (gimp-palette-get-foreground)))
	 (old-bg (car (gimp-palette-get-background)))
	 (theWidth inSize)
	 (theHeight inSize)
	 (theRadius (max theWidth theHeight))
	 (theImage (car (gimp-image-new theWidth theHeight RGB)))
	 (theLayer (car (gimp-layer-new theImage theWidth theHeight RGB-IMAGE "Background" 100 NORMAL-MODE)))
	)

    (gimp-image-undo-disable theImage)
    (gimp-image-add-layer theImage theLayer -1)
    (gimp-palette-set-foreground '(255 255 255))
    (gimp-palette-set-background '(0 0 0))
    (gimp-drawable-fill theLayer BACKGROUND-FILL)

    (while (< count inRepeat)
      (cond
	;; Radius
	((= inOption 0)
	  (let* ((x-coordinate (get-random-coordinate 0 (- theWidth 1)))
	         (y-coordinate (get-random-coordinate 0 (- theHeight 1))))
	    (gimp-edit-blend theLayer FG-BG-RGB-MODE LIGHTEN-ONLY-MODE GRADIENT-RADIAL 100 0 REPEAT-NONE FALSE FALSE 0 0.20 FALSE
		        x-coordinate
		        y-coordinate
		        (+ x-coordinate (get-random-coordinate (/ theRadius inLimit) (/ theRadius inLimit inLimit)))
		        (+ y-coordinate (get-random-coordinate (/ theRadius inLimit) (/ theRadius inLimit inLimit)))))
	)
	;; Square
	((= inOption 1)
	  (let* ((x-coordinate (get-random-coordinate 0 (- theWidth 1)))
	         (y-coordinate (get-random-coordinate 0 (- theHeight 1))))
	    (gimp-edit-blend theLayer FG-BG-RGB-MODE LIGHTEN-ONLY-MODE GRADIENT-SQUARE 100 0 REPEAT-NONE FALSE FALSE 0 0.20 FALSE
		        x-coordinate
		        y-coordinate
		        (+ x-coordinate (get-random-coordinate (/ theRadius inLimit) (/ theRadius inLimit inLimit)))
		        (+ y-coordinate (get-random-coordinate (/ theRadius inLimit) (/ theRadius inLimit inLimit)))))
	)
	;; Linear
	((= inOption 2)
	  (let* ((x-coordinate (get-random-coordinate 0 (- theWidth 1)))
	         (y-coordinate (get-random-coordinate 0 (- theHeight 1))))
	    (gimp-edit-blend theLayer FG-BG-RGB-MODE DIFFERENCE-MODE GRADIENT-LINEAR 100 0 REPEAT-NONE FALSE FALSE 0 0.20 FALSE
		        x-coordinate
		        y-coordinate
		        (+ x-coordinate (get-random-coordinate (/ theRadius inLimit -1) (/ theRadius inLimit)))
		        (+ y-coordinate (get-random-coordinate (/ theRadius inLimit -1) (/ theRadius inLimit)))))
	)
      )
      (set! count (+ count 1))
    )

    (if (equal? inInvert TRUE) (gimp-invert theLayer))
    (gimp-palette-set-foreground old-fg)
    (gimp-palette-set-background old-bg)
    (gimp-image-undo-enable theImage)
    (gimp-display-new theImage)
    (gimp-displays-flush)
  )
)

	; 登録など
(script-fu-register
	"script-fu-random-dots"
	"<Toolbox>/Xtns/Script-Fu/Misc/Random Dots..."
	"random dots"
	"Iccii <iccii@hotmail.com>"
	"Iccii"
	"Sep, 2001"
	""
	SF-ADJUSTMENT	_"Image Size"		'(256 1 1024 1 10 0 1)
	SF-OPTION	_"Seed"			'(_"Radius" _"Square" _"Linear")
	SF-ADJUSTMENT	_"Number"		'(50 1 128 1 5 0 0)
	SF-ADJUSTMENT	_"Radius"		'(8.0 1.1 32 0.1 1.0 1 0)
	SF-TOGGLE	_"Invert"		FALSE
)