mirror of
https://gitlab.gnome.org/GNOME/gimp
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b435e55d14
Original patch supplied by Nelson A. de Oliveira. Modified to not use the -1 "insanity" for invalid/none layer ID's in scripts per IRC discussion. Additional scripts were changed to not pass -1 to gimp-image-insert-layer.
189 lines
5.5 KiB
Scheme
189 lines
5.5 KiB
Scheme
; GIMP - The GNU 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 3 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, see <http://www.gnu.org/licenses/>.
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(define (script-fu-alien-glow-right-arrow size
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orientation
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glow-color
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bg-color
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flatten)
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; some local helper functions, better to not define globally,
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; since otherwise the definitions could be clobbered by other scripts.
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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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)
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)
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)
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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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)
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)
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)
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(define (make-point x y)
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(cons x y)
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)
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(define (point-x p)
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(car p)
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)
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(define (point-y p)
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(cdr p)
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)
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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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)
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)
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)
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(let* (
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(how-many (length point-list))
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(a (cons-array (* 2 how-many) 'double))
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)
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(convert point-list a 0)
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a
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)
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)
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(define (make-arrow size
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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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)
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)
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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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)
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)
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)
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points
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)
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)
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; the main function
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(let* (
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(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
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size size RGBA-IMAGE
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_"Arrow" 100 NORMAL-MODE)))
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(glow-layer (car (gimp-layer-new img
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size size RGBA-IMAGE
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_"Alien Glow" 100 NORMAL-MODE)))
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(bg-layer (car (gimp-layer-new img
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size size RGB-IMAGE
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_"Background" 100 NORMAL-MODE)))
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(big-arrow (point-list->double-array
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(rotate-points (make-arrow size offset)
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size orientation)))
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)
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(gimp-context-push)
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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-insert-layer img bg-layer 0 1)
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(gimp-image-insert-layer img glow-layer 0 -1)
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(gimp-image-insert-layer img ruler-layer 0 -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 CHANNEL-OP-REPLACE TRUE FALSE 0)
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(gimp-context-set-foreground '(103 103 103))
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(gimp-context-set-background '(0 0 0))
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(gimp-edit-blend ruler-layer FG-BG-RGB-MODE NORMAL-MODE
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GRADIENT-SHAPEBURST-ANGULAR 100 0 REPEAT-NONE FALSE
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FALSE 0 0 TRUE
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0 0 size size)
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(gimp-selection-grow img grow-amount)
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(gimp-context-set-foreground glow-color)
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(gimp-edit-fill glow-layer FOREGROUND-FILL)
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(gimp-selection-none img)
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(plug-in-gauss-rle RUN-NONINTERACTIVE img glow-layer blur-radius TRUE TRUE)
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(gimp-context-set-background bg-color)
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(gimp-edit-fill bg-layer BACKGROUND-FILL)
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(if (= flatten TRUE)
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(gimp-image-flatten img)
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)
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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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)
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)
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(script-fu-register "script-fu-alien-glow-right-arrow"
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_"_Arrow..."
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_"Create an arrow graphic with an eerie glow for web pages"
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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-ADJUSTMENT _"Size" '(32 5 150 1 10 0 1)
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SF-OPTION _"Orientation" '(_"Right" _"Left" _"Up" _"Down")
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SF-COLOR _"Glow color" '(63 252 0)
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SF-COLOR _"Background color" "black"
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SF-TOGGLE _"Flatten image" TRUE
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)
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(script-fu-menu-register "script-fu-alien-glow-right-arrow"
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"<Image>/File/Create/Web Page Themes/Alien Glow")
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