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predator.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
;
; Predator effect
; Copyright (c) 1997 Adrian Likins
; aklikins@eos.ncsu.ed
;
; The idea here is too make the image/selection look sort of like
; the view the predator had in the movies. ie, kind of a thermogram
; type of thing. Works best on colorful rgb images.
;
; 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-predator image
drawable
edge-amount
pixelize
pixel-size
keep-selection
separate-layer)
(let* (
(type (car (gimp-drawable-type-with-alpha drawable)))
(image-width (car (gimp-image-width image)))
(image-height (car (gimp-image-height image)))
(active-selection 0)
(from-selection 0)
(selection-bounds 0)
(select-offset-x 0)
(select-offset-y 0)
(select-width 0)
(select-height 0)
(effect-layer 0)
(active-layer 0)
)
(gimp-image-undo-group-start image)
(gimp-layer-add-alpha drawable)
(if (= (car (gimp-selection-is-empty image)) TRUE)
(begin
(gimp-selection-layer-alpha drawable)
(set! active-selection (car (gimp-selection-save image)))
(set! from-selection FALSE)
)
(begin
(set! from-selection TRUE)
(set! active-selection (car (gimp-selection-save image)))
)
)
(set! selection-bounds (gimp-selection-bounds image))
(set! select-offset-x (cadr selection-bounds))
(set! select-offset-y (caddr selection-bounds))
(set! select-width (- (cadr (cddr selection-bounds)) select-offset-x))
(set! select-height (- (caddr (cddr selection-bounds)) select-offset-y))
(if (= separate-layer TRUE)
(begin
(set! effect-layer (car (gimp-layer-new image
select-width
select-height
type
"glow layer"
100
NORMAL-MODE))
)
(gimp-layer-set-offsets effect-layer select-offset-x select-offset-y)
(gimp-image-add-layer image effect-layer -1)
(gimp-selection-none image)
(gimp-edit-clear effect-layer)
(gimp-selection-load active-selection)
(gimp-edit-copy drawable)
(let ((floating-sel (car (gimp-edit-paste effect-layer FALSE))))
(gimp-floating-sel-anchor floating-sel)
)
(gimp-image-set-active-layer image effect-layer)
)
(set! effect-layer drawable)
)
(set! active-layer effect-layer)
; all the fun stuff goes here
(if (= pixelize TRUE)
(plug-in-pixelize RUN-NONINTERACTIVE image active-layer pixel-size)
)
(plug-in-max-rgb RUN-NONINTERACTIVE image active-layer 0)
(plug-in-edge RUN-NONINTERACTIVE image active-layer edge-amount 1 0)
; clean up the selection copy
(gimp-selection-load active-selection)
(if (= keep-selection FALSE)
(gimp-selection-none image)
)
(gimp-image-set-active-layer image drawable)
(gimp-image-remove-channel image active-selection)
(gimp-image-undo-group-end image)
(gimp-displays-flush)
)
)
(script-fu-register "script-fu-predator"
_"_Predator..."
_"Add a 'Predator' effect to the selected region (or alpha)"
"Adrian Likins <adrian@gimp.org>"
"Adrian Likins"
"10/12/97"
"RGB*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT _"Edge amount" '(2 0 24 1 1 0 0)
SF-TOGGLE _"Pixelize" TRUE
SF-ADJUSTMENT _"Pixel amount" '(3 1 16 1 1 0 0)
SF-TOGGLE _"Keep selection" TRUE
SF-TOGGLE _"Separate layer" TRUE
)
(script-fu-menu-register "script-fu-predator"
"<Image>/Filters/Artistic")