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beveled-pattern-arrow.scm
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2009-12-15
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; GIMP - The GNU Image Manipulation Program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; Beveled pattern arrow for web pages
; Copyright (C) 1997 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 (script-fu-beveled-pattern-arrow size orientation pattern)
(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)
(let* (
(how-many (length point-list))
(a (cons-array (* 2 how-many) 'double))
(count 0)
)
(for-each (lambda (p)
(aset a (* count 2) (point-x p))
(aset a (+ 1 (* count 2)) (point-y p))
(set! count (+ count 1)))
point-list
)
a
)
)
(define (rotate-points points size orientation)
(map (lambda (p)
(let ((px (point-x p))
(py (point-y p)))
(cond ((= orientation 0) (make-point px py)) ; right
((= orientation 1) (make-point (- size px) py)) ; left
((= orientation 2) (make-point py (- size px))) ; up
((= orientation 3) (make-point py px)) ; down
)
)
)
points
)
)
(define (make-arrow size offset)
(list (make-point offset offset)
(make-point (- size offset) (/ size 2))
(make-point offset (- size offset)))
)
; the main function
(let* (
(img (car (gimp-image-new size size RGB)))
(background (car (gimp-layer-new img size size RGB-IMAGE "Arrow" 100 NORMAL-MODE)))
(bumpmap (car (gimp-layer-new img size size RGB-IMAGE "Bumpmap" 100 NORMAL-MODE)))
(big-arrow (point-list->double-array (rotate-points (make-arrow size 6) size orientation)))
(med-arrow (point-list->double-array (rotate-points (make-arrow size 7) size orientation)))
(small-arrow (point-list->double-array (rotate-points (make-arrow size 8) size orientation)))
)
(gimp-context-push)
(gimp-image-undo-disable img)
(gimp-image-add-layer img background -1)
(gimp-image-add-layer img bumpmap -1)
; Create pattern layer
(gimp-context-set-background '(0 0 0))
(gimp-edit-fill background BACKGROUND-FILL)
(gimp-context-set-pattern pattern)
(gimp-edit-bucket-fill background PATTERN-BUCKET-FILL NORMAL-MODE 100 0 FALSE 0 0)
; Create bumpmap layer
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-context-set-background '(127 127 127))
(gimp-rect-select img 1 1 (- size 2) (- size 2) CHANNEL-OP-REPLACE FALSE 0)
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-context-set-background '(255 255 255))
(gimp-rect-select img 2 2 (- size 4) (- size 4) CHANNEL-OP-REPLACE FALSE 0)
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-context-set-background '(127 127 127))
(gimp-free-select img 6 big-arrow CHANNEL-OP-REPLACE TRUE FALSE 0)
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-context-set-background '(0 0 0))
(gimp-free-select img 6 med-arrow CHANNEL-OP-REPLACE TRUE FALSE 0)
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-selection-none img)
; Bumpmap
(plug-in-bump-map RUN-NONINTERACTIVE img background bumpmap 135 45 2 0 0 0 0 TRUE FALSE 0)
; Darken arrow
(gimp-context-set-background '(255 255 255))
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-context-set-background '(192 192 192))
(gimp-free-select img 6 small-arrow CHANNEL-OP-REPLACE TRUE FALSE 0)
(gimp-edit-fill bumpmap BACKGROUND-FILL)
(gimp-selection-none img)
(gimp-layer-set-mode bumpmap MULTIPLY-MODE)
(gimp-image-flatten img)
(gimp-image-undo-enable img)
(gimp-display-new img)
(gimp-context-pop)
)
)
(script-fu-register "script-fu-beveled-pattern-arrow"
_"_Arrow..."
_"Create a beveled pattern arrow for webpages"
"Federico Mena Quintero"
"Federico Mena Quintero"
"July 1997"
""
SF-ADJUSTMENT _"Size" '(32 5 150 1 10 0 1)
SF-OPTION _"Orientation" '(_"Right" _"Left" _"Up" _"Down")
SF-PATTERN _"Pattern" "Wood"
)
(script-fu-menu-register "script-fu-beveled-pattern-arrow"
"<Image>/File/Create/Web Page Themes/Beveled Pattern")