/usr/share/gimp/2.0/scripts/trefftzs-pixel-gradient.scm is in gimp-plugin-registry 5.20120621ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
;
; pixel gradient script for GIMP 2.4
; Original author: Jeff Trefftzs <trefftzs@tcsn.net>
;
; Tags: effect
;
; Author statement:
;
;
; --------------------------------------------------------------------
; Distributed by Gimp FX Foundry project
; --------------------------------------------------------------------
; - Changelog -
;
; --------------------------------------------------------------------
;
; 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 3 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, see <http://www.gnu.org/licenses/>.
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Define the function:
(define (script-fu-pixelgradient inImage inLayer minsize maxsize nsteps)
;; If there isn't already a selection, select the whole thing
(let* (
(noselection 0)
)
(if (car (gimp-selection-bounds inImage))
(begin
(set! noselection FALSE)
)
(begin
(gimp-selection-all inImage)
(set! noselection TRUE)
)
)
(let* (
(selchannel (car (gimp-selection-save inImage)))
(selstuff (gimp-selection-bounds inImage))
(width
(cond ((car selstuff)
(- (nth 3 selstuff) (nth 1 selstuff)))
(t (car (gimp-image-width inImage)))))
(height
(cond ((car selstuff)
(- (nth 4 selstuff) (nth 2 selstuff)))
(t (car (gimp-image-height inImage)))))
(x0
(cond ((car selstuff)
(nth 1 selstuff))
(t 0)))
(y0
(cond ((car selstuff)
(nth 2 selstuff))
(t 0)))
(x1 width)
(y1 height)
(stepwidth (/ width nsteps))
(pixstep (/ (- maxsize minsize) nsteps))
(startx x0)
(startsize minsize)
)
(gimp-image-undo-group-start inImage)
;; Step across the selection (or image), pixelizing as we go
(while (< startx x1)
(begin
(gimp-selection-load selchannel)
(gimp-rect-select inImage startx y0 stepwidth height
CHANNEL-OP-INTERSECT
FALSE
0)
(plug-in-pixelize TRUE inImage inLayer startsize)
(set! startx (+ startx stepwidth))
(set! startsize (+ startsize pixstep))
)
)
(if (equal? TRUE noselection)
(gimp-selection-none inImage)
(gimp-selection-load selchannel)
)
)
(gimp-image-set-active-layer inImage inLayer)
(gimp-image-undo-group-end inImage)
(gimp-displays-flush)
)
)
(script-fu-register
"script-fu-pixelgradient"
_"Pixel Gradient"
_"Pixelizes a selection (or layer) from left to right with increasing pixel sizes."
"Jeff Trefftzs"
"Copyright 2003, Jeff Trefftzs"
"November 17, 2003"
"RGB* GRAY* INDEXED*"
SF-IMAGE "The Image" 0
SF-DRAWABLE "The Layer" 0
SF-ADJUSTMENT _"Minimum Pixel Size" '(5 1 256 1 5 0 1)
SF-ADJUSTMENT _"Maximum Pixel Size" '(64 1 256 1 5 0 1)
SF-ADJUSTMENT _"Number of Steps" '(5 1 256 1 5 0 1)
)
(script-fu-menu-register "script-fu-pixelgradient"
"<Image>/FX-Foundry/Selection Effects")
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