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