/usr/share/gimp/2.0/scripts/lowry-auto-contrast.scm is in gimp-plugin-registry 7.20140602ubuntu2.
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
;
; Auto Contrast Correction script for GIMP 2.4
; Original author: Mark Lowry
;
; Tags: color, photo, exposure
;
; Author statement:
;
; Automatically adjusts contrast of the current
; drawable by duplicating the layer, setting the
; new layer to Value blend mode, then running
; Auto Levels on the Value layer.
;
; --------------------------------------------------------------------
; Distributed by Gimp FX Foundry project
; --------------------------------------------------------------------
; - Changelog -
; Created 4/5/2006
; Revised 10/26/2007 to fix unbound variables (required for v.2.4.0)
; Revised 10/31/2007 - added option to skip autolevels for later manual adjustment - Alexia Death
; Revised 11/01/2007 - Added Hue correction layer - Alexia Death
;
; --------------------------------------------------------------------
;
; 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-auto-contrast img drawable merge-flag alskip-flag)
(let* (
(value-layer 0)
(hue-layer 0)
)
; Start an undo group. Everything between the start and the end
; will be carried out if an undo command is issued.
(gimp-image-undo-group-start img)
;; CREATE THE VALUE LAYER ;;
; Create a new layer
(set! value-layer (car (gimp-layer-copy drawable 0)))
(set! hue-layer (car (gimp-layer-copy drawable 0)))
; Give it a name
(gimp-drawable-set-name value-layer _"Contrast Adjustment Layer")
(gimp-drawable-set-name hue-layer _"Hue Correction Layer")
; Add the new layer to the image
(gimp-image-add-layer img value-layer 0)
(gimp-image-add-layer img hue-layer 0)
; Set opacity to 100%
(gimp-layer-set-opacity value-layer 100)
(gimp-layer-set-opacity hue-layer 100)
; Set the layer modes to Value and hue
(gimp-layer-set-mode value-layer VALUE-MODE)
(gimp-layer-set-mode hue-layer HUE-MODE)
; Adjust contrast
(if (equal? alskip-flag FALSE)
(gimp-levels-stretch value-layer)
)
; Merge down, if required
(if (equal? merge-flag TRUE)
(begin
(gimp-image-merge-down img value-layer 1)
(gimp-image-merge-down img hue-layer 1)
)
)
;
; Complete the undo group
(gimp-image-undo-group-end img)
; Flush the display
(gimp-displays-flush)
)
)
(script-fu-register "script-fu-auto-contrast"
_"Auto contrast correction"
_"Automatically adjust contrast of drawable. Brightens dull photos."
"Mark Lowry"
"Mark Lowry"
"2007"
"RGB*, GRAY*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Current Layer" 0
SF-TOGGLE _"Merge Layers" FALSE
SF-TOGGLE _"Skip autolevels" FALSE
)
(script-fu-menu-register "script-fu-auto-contrast"
"<Image>/FX-Foundry/Photo/Enhancement")
|