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FU_effects_crosslight.scm
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; FU_effects_crosslight.scm
; version 2.8 [gimphelp.org]
; last modified/tested by Paul Sherman
; 02/14/2014 on GIMP-2.8.10
; 03/09/2020 on GIMP-2.10.20
;
; 02/14/2014 - convert to RGB if needed, added option to merge layers upon completion
;==============================================================
;
; Installation:
; This script should be placed in the user or system-wide script folder.
;
; Windows Vista/7/8)
; C:\Program Files\GIMP 2\share\gimp\2.0\scripts
; or
; C:\Users\YOUR-NAME\.gimp-2.8\scripts
;
; Windows XP
; C:\Program Files\GIMP 2\share\gimp\2.0\scripts
; or
; C:\Documents and Settings\yourname\.gimp-2.8\scripts
;
; Linux
; /home/yourname/.gimp-2.8/scripts
; or
; Linux system-wide
; /usr/share/gimp/2.0/scripts
;
;==============================================================
;
; LICENSE
;
; 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/>.
;
;==============================================================
; Original information
;
; Cross light script for GIMP 2
; based on Cross light script for GIMP 1.2
; Copyright (C) 2001 Iccii <iccii@hotmail.com>
;
; --------------------------------------------------------------------
; version 0.1 by Iccii 2001/07/22
; - Initial relase
; version 0.2 by Iccii 2001/08/09
; - Add the Start Angle and the Number of Lighting options
; version 0.2a adapted for GIMP2 by EV
;==============================================================
(define (FU-cross-light
img
drawable
length
angle
number
threshold
inMerge
)
(gimp-image-undo-group-start img)
(if (not (= RGB (car (gimp-image-base-type img))))
(gimp-image-convert-rgb img)
)
(let* (
(modulo fmod);; in R4RS way
(count 1)
(tmp-layer (car (gimp-layer-copy drawable TRUE)))
(target-layer (car (gimp-layer-copy drawable TRUE)))
(layer-mask (car (gimp-layer-create-mask target-layer ADD-MASK-WHITE)))
(marged-layer (car (gimp-layer-copy drawable TRUE)))
(currentselection (car(gimp-selection-save img)))
)
; (set! currentselection (car(gimp-selection-save img)))
(gimp-selection-none img)
(gimp-image-insert-layer img target-layer 0 -1)
(gimp-layer-add-mask target-layer layer-mask)
(gimp-image-insert-layer img tmp-layer 0 -1)
(gimp-drawable-desaturate tmp-layer DESATURATE-LIGHTNESS)
(gimp-threshold tmp-layer threshold 255)
(gimp-edit-copy tmp-layer)
(gimp-floating-sel-anchor (car (gimp-edit-paste layer-mask 0)))
(gimp-layer-remove-mask target-layer MASK-APPLY)
(gimp-drawable-fill tmp-layer FILL-TRANSPARENT)
(gimp-image-set-active-layer img target-layer)
(while (<= count number)
(let* (
(layer-copy (car (gimp-layer-copy target-layer TRUE)))
(degree (modulo (+ (* count (/ 360 number)) angle) 360))
)
(gimp-image-insert-layer img layer-copy 0 -1)
(if (= count 1)
(gimp-image-raise-item img layer-copy)
)
(plug-in-mblur 1 img layer-copy 0 length degree 0 0); two argyuments added for GIMP2 by EV
(set! marged-layer (car (gimp-image-merge-down img layer-copy 0 )))
(gimp-item-set-name marged-layer "cross-light") ; this line was added by EV
(set! count (+ count 1))
) ; end of let*
) ; end of while
(gimp-image-remove-layer img target-layer)
(gimp-layer-set-opacity marged-layer 80)
(gimp-layer-set-mode marged-layer LAYER-MODE-SCREEN)
(gimp-image-select-item img CHANNEL-OP-REPLACE currentselection) ; these five lines are new in version 0.6a
(if (equal? (car (gimp-selection-is-empty img)) FALSE)
(begin
(gimp-selection-invert img)
(if (equal? (car (gimp-selection-is-empty img)) FALSE)
(gimp-edit-fill marged-layer 3)
)
(gimp-selection-invert img)
)
)
(gimp-image-remove-channel img currentselection)
(if (= inMerge TRUE)
(gimp-image-merge-visible-layers img EXPAND-AS-NECESSARY)
)
(gimp-image-undo-group-end img)
(gimp-displays-flush)
)
)
(script-fu-register
"FU-cross-light"
"<Image>/Script-Fu/Effects/Cross Light"
"Cross light effect - sort of a random criss-cross of speculars. \nfile:FU_effects_crosslight.scm"
"Iccii <iccii@hotmail.com>"
"Iccii"
"2001, Aug"
"*"
SF-IMAGE "Image" 0
SF-DRAWABLE "Drawable" 0
SF-ADJUSTMENT "Light Length" '(40 1 255 1 10 0 0)
SF-ADJUSTMENT "Start Angle" '(30 0 360 1 10 0 0)
SF-ADJUSTMENT "Number of Lights" '(3 1 16 1 2 0 1)
SF-ADJUSTMENT "Threshold (Bigger 1<-->255 Smaller)" '(223 1 255 1 10 0 0)
SF-TOGGLE "Merge layers when complete?" FALSE
)
; end of script