原出處：
某位GIMP前輩討論區中，修改來自
http://www.remoserv.de的scm檔，成為灰階模式，讓改變大小後的筆刷具有改變色彩的能力
不過該討論區不見了......但這麼好用的工具，就如此而消失，未免太可惜了......
(後知後覺的我連討論區主人叫什麼名字都不知道～)
使用方式：
新增純文字文件，貼入＝＝以下的文字，另存新檔時將副檔名改為scm
我手邊檔案原檔名為resizebrush-1-3.scm
然後把檔丟到放SCM的資料夾
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
;; resizebrush.scm -*-scheme-
;; resizes a (gbr)-brush
;; version 1.0 2005-11-13
;;
;; Copyright (C) 2005 by Michael Hoelzen
;; http://www.remoserv.de
;;
; 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.
;
; version 1.1
; the #resiZed.gbr will now be saved in the gimp-directory instead of
; the gimp-data-directory which is write-protected in unix
;
; version 1.2
; changed \brushes\ to /brushes/ for unix-confirmity
;
; version 1.3 Modify by JamesH
; 加入灰階選項，讓縮放之後的筆刷也能改變顏色
(define
(script-fu-resize-brush image drawable resFactor bgray)
(define brushnameResi ”#resiZed”)
(define filesave (string-append ”” gimp-directory ”/brushes/” brushnameResi ”.gbr”))
(define brushnameIn (car (gimp-context-get-brush)))
(define (testIfresiZed a)
(if (not (null? (string-search brushnameResi a)))
(substring a 0 (string-search brushnameResi a))
a
)
)
(set! actualbrush (testIfresiZed brushnameIn))
(gimp-context-set-brush actualbrush)
(let*
(
(brushnameOut (string-append actualbrush brushnameResi))
(spacing (car (gimp-brush-get-spacing actualbrush)))
(brushDimens (gimp-brush-get-info actualbrush))
(brushWidth (car brushDimens))
(brushHeight (cadr brushDimens))
(resiZedWidth (* brushWidth resFactor))
(resiZedHeight(* brushHeight resFactor))
(centerX (/ brushWidth 2))
(centerY (/ brushHeight 2))
(centerXpluseins(+ centerX 1))
(centerYpluseins(+ centerY 1))
)
(and (> resiZedWidth 1)(> resiZedHeight 1)
(begin
(set! arrayToPaint (cons-array 4 ’double))
(aset arrayToPaint 0 centerX)
(aset arrayToPaint 1 centerY)
(aset arrayToPaint 2 centerXpluseins)
(aset arrayToPaint 3 centerYpluseins)
(set! image (car (gimp-image-new brushWidth brushHeight RGB)))
(set! layer (car (gimp-layer-new image brushWidth brushHeight 1 ”layer 1” 100 0)))
(gimp-image-undo-disable image)
(gimp-image-add-layer image layer 0)
(gimp-drawable-fill layer 3)
(if (= bgray 0)
(begin
(gimp-paintbrush-default layer 4 arrayToPaint)
(gimp-image-scale image resiZedWidth resiZedHeight)
)
(begin
(set! scolor (car (gimp-context-get-foreground)))
(set! bcolor (car (gimp-context-get-background)))
(gimp-context-set-foreground ’(0 0 0))
(gimp-context-set-background ’(255 255 255))
(gimp-paintbrush-default layer 4 arrayToPaint)
(gimp-image-scale image resiZedWidth resiZedHeight)
(gimp-image-convert-grayscale image)
(set! layer (car (gimp-image-flatten image)))
(gimp-context-set-foreground scolor)
(gimp-context-set-background bcolor)
)
)
(file-gbr-save 1 image layer filesave filesave spacing brushnameOut)
(gimp-image-undo-enable image)
(gimp-image-delete image)
(gimp-brushes-refresh)
(gimp-context-set-brush brushnameOut)))
)
)
;
(script-fu-register ”script-fu-resize-brush”
_”_ResiZebrush”
”ResiZe a brush”
”Michael Hoelzen>”
”Michael Hoelzen”
”2005”
””
SF-IMAGE ”Image” 0
SF-DRAWABLE ”Drawable” 0
SF-ADJUSTMENT _”resFactor” ’(1.3 0.1 3.0 0.1 1 1 0)
SF-TOGGLE ”灰階” TRUE
)
(script-fu-menu-register ”script-fu-resize-brush”
_”/Script-Fu/BrushUtil”)
