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-
-
- ; The GIMP -- an image manipulation program
- ; Copyright (C) 1995 Spencer Kimball and Peter Mattis
- ;
- ; Alien Glow themed arrows for web pages
- ; Copyright (c) 1997 Adrian Likins
- ; aklikins@eos.ncsu.edu
- ;
- ;
- ; Based on code from
- ; Federico Mena Quintero
- ; federico@nuclecu.unam.mx
- ;
- ; 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 (make-point x y)
- (cons x y))
-
- (define (point-x p)
- (car p))
-
- (define (point-y p)
- (cdr p))
-
- (define (point-list->double-array point-list)
- (define (convert points array pos)
- (if (not (null? points))
- (begin
- (aset array (* 2 pos) (point-x (car points)))
- (aset array (+ 1 (* 2 pos)) (point-y (car points)))
- (convert (cdr points) array (+ pos 1)))))
-
- (let* ((how-many (length point-list))
- (a (cons-array (* 2 how-many) 'double)))
- (convert point-list a 0)
- a))
-
- (define (make-arrow size offset)
- (list (make-point offset offset)
- (make-point (- size offset) (/ size 2))
- (make-point offset (- size offset))))
-
-
- (define (rotate-points points size orientation)
- (if (null? points)
- '()
- (let* ((p (car points))
- (px (point-x p))
- (py (point-y p)))
- (cons (cond ((eq? orientation 'right) (make-point px py))
- ((eq? orientation 'left) (make-point (- size px) py))
- ((eq? orientation 'up) (make-point py (- size px)))
- ((eq? orientation 'down) (make-point py px)))
- (rotate-points (cdr points) size orientation)))))
-
-
- (define (script-fu-alien-glow-right-arrow size orientation glow-color bg-color flatten)
- (let* ((img (car (gimp-image-new size size RGB)))
- (grow-amount (/ size 12))
- (blur-radius (/ size 3))
- (offset (/ size 6))
- (ruler-layer (car (gimp-layer-new img size size RGBA_IMAGE "Ruler" 100 NORMAL)))
- (glow-layer (car (gimp-layer-new img size size RGBA_IMAGE "Alien Glow" 100 NORMAL)))
- (bg-layer (car (gimp-layer-new img size size RGB_IMAGE "Back" 100 NORMAL)))
- (big-arrow (point-list->double-array (rotate-points (make-arrow size offset) size orientation)))
- (old-fg (car (gimp-palette-get-foreground)))
- (old-bg (car (gimp-palette-get-background))))
-
-
- (gimp-image-disable-undo img)
- ;(gimp-image-resize img (+ length height) (+ height height) 0 0)
- (gimp-image-add-layer img bg-layer 1)
- (gimp-image-add-layer img glow-layer -1)
- (gimp-image-add-layer img ruler-layer -1)
-
- (gimp-edit-clear img glow-layer)
- (gimp-edit-clear img ruler-layer)
-
-
- (gimp-free-select img 6 big-arrow REPLACE TRUE FALSE 0)
-
- (gimp-palette-set-foreground '(103 103 103))
- (gimp-palette-set-background '(0 0 0))
- (gimp-blend img ruler-layer FG-BG-RGB NORMAL SHAPEBURST-ANGULAR 100 0 REPEAT-NONE FALSE 0 0 0 0 size size)
-
- (gimp-selection-grow img grow-amount)
- (gimp-palette-set-background glow-color)
- (gimp-edit-fill img glow-layer)
-
- (gimp-selection-none img)
-
-
- (plug-in-gauss-rle 1 img glow-layer blur-radius TRUE TRUE)
-
- (gimp-palette-set-background bg-color)
- (gimp-edit-fill img bg-layer)
-
- (gimp-palette-set-background old-bg)
- (gimp-palette-set-foreground old-fg)
-
- (if (= flatten TRUE)
- (gimp-image-flatten img))
- (gimp-image-enable-undo img)
- (gimp-display-new img)))
-
- (script-fu-register "script-fu-alien-glow-right-arrow"
- "<Toolbox>/Xtns/Script-Fu/Web page themes/Alien Glow/Arrow"
- "Create aan X-file deal"
- "Adrian Likins"
- "Adrian Likins"
- "1997"
- ""
- SF-VALUE "Size" "32"
- SF-VALUE "Orientation" "'right"
- SF-COLOR "Glow Color" '(63 252 0)
- SF-COLOR "Background Color" '(0 0 0)
- SF-TOGGLE "Flatten Image" TRUE)
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