mirror of https://github.com/GNOME/gimp.git
158 lines
5.2 KiB
Scheme
158 lines
5.2 KiB
Scheme
; The GIMP -- an image manipulation program
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; Copyright (C) 1995 Spencer Kimball and Peter Mattis
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;
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; Beveled pattern arrow for web pages
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; Copyright (C) 1997 Federico Mena Quintero
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; federico@nuclecu.unam.mx
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;
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; This program is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 2 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; if not, write to the Free Software
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; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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(define (script-fu-beveled-pattern-arrow size orientation pattern)
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; define some local helper functions
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(define (map proc seq)
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(if (null? seq)
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'()
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(cons (proc (car seq))
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(map proc (cdr seq)))))
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(define (for-each proc seq)
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(if (not (null? seq))
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(begin
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(proc (car seq))
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(for-each proc (cdr seq)))))
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(define (make-point x y)
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(cons x y))
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(define (point-x p)
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(car p))
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(define (point-y p)
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(cdr p))
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(define (point-list->double-array point-list)
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(let* ((how-many (length point-list))
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(a (cons-array (* 2 how-many) 'double))
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(count 0))
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(for-each (lambda (p)
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(aset a (* count 2) (point-x p))
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(aset a (+ 1 (* count 2)) (point-y p))
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(set! count (+ count 1)))
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point-list)
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a))
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(define (rotate-points points size orientation)
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(map (lambda (p)
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(let ((px (point-x p))
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(py (point-y p)))
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(cond ((= orientation 0) (make-point px py)) ; right
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((= orientation 1) (make-point (- size px) py)) ; left
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((= orientation 2) (make-point py (- size px))) ; up
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((= orientation 3) (make-point py px))))) ; down
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points))
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(define (make-arrow size offset)
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(list (make-point offset offset)
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(make-point (- size offset) (/ size 2))
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(make-point offset (- size offset))))
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; the main function
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(let* ((img (car (gimp-image-new size size RGB)))
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(background (car (gimp-layer-new img size size RGB-IMAGE "Arrow" 100 NORMAL-MODE)))
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(bumpmap (car (gimp-layer-new img size size RGB-IMAGE "Bumpmap" 100 NORMAL-MODE)))
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(big-arrow (point-list->double-array (rotate-points (make-arrow size 6) size orientation)))
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(med-arrow (point-list->double-array (rotate-points (make-arrow size 7) size orientation)))
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(small-arrow (point-list->double-array (rotate-points (make-arrow size 8) size orientation))))
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(gimp-context-push)
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(gimp-image-undo-disable img)
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(gimp-image-add-layer img background -1)
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(gimp-image-add-layer img bumpmap -1)
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; Create pattern layer
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(gimp-context-set-background '(0 0 0))
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(gimp-edit-fill background BACKGROUND-FILL)
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(gimp-context-set-pattern pattern)
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(gimp-edit-bucket-fill background PATTERN-BUCKET-FILL NORMAL-MODE 100 0 FALSE 0 0)
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; Create bumpmap layer
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-context-set-background '(127 127 127))
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(gimp-rect-select img 1 1 (- size 2) (- size 2) CHANNEL-OP-REPLACE FALSE 0)
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-context-set-background '(255 255 255))
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(gimp-rect-select img 2 2 (- size 4) (- size 4) CHANNEL-OP-REPLACE FALSE 0)
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-context-set-background '(127 127 127))
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(gimp-free-select img 6 big-arrow CHANNEL-OP-REPLACE TRUE FALSE 0)
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-context-set-background '(0 0 0))
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(gimp-free-select img 6 med-arrow CHANNEL-OP-REPLACE TRUE FALSE 0)
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-selection-none img)
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; Bumpmap
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(plug-in-bump-map 1 img background bumpmap 135 45 2 0 0 0 0 TRUE FALSE 0)
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; Darken arrow
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(gimp-context-set-background '(255 255 255))
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-context-set-background '(192 192 192))
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(gimp-free-select img 6 small-arrow CHANNEL-OP-REPLACE TRUE FALSE 0)
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(gimp-edit-fill bumpmap BACKGROUND-FILL)
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(gimp-selection-none img)
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(gimp-layer-set-mode bumpmap MULTIPLY-MODE)
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(gimp-image-flatten img)
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(gimp-image-undo-enable img)
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(gimp-display-new img)
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(gimp-context-pop)))
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(script-fu-register "script-fu-beveled-pattern-arrow"
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_"_Arrow..."
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"Beveled pattern arrow"
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"Federico Mena Quintero"
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"Federico Mena Quintero"
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"July 1997"
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""
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SF-ADJUSTMENT _"Size" '(32 5 150 1 10 0 1)
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SF-OPTION _"Orientation" '(_"Right"
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_"Left"
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_"Up"
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_"Down")
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SF-PATTERN _"Pattern" "Wood")
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(script-fu-menu-register "script-fu-beveled-pattern-arrow"
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"<Toolbox>/Xtns/Script-Fu/Web Page Themes/Beveled Pattern")
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