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; Chris Gutteridge (cjg@ecs.soton.ac.uk)
; At ECS Dept, University of Southampton, England.
; 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 <https://www.gnu.org/licenses/>.
(define (script-fu-coffee-stain inImage inLayer inNumber inDark)
(let* (
(theImage inImage)
(theHeight (car (gimp-image-height theImage)))
(theWidth (car (gimp-image-width theImage)))
(theNumber inNumber)
(theSize (min theWidth theHeight))
(theStain 0)
)
(gimp-context-push)
(gimp-context-set-defaults)
(gimp-image-undo-group-start theImage)
(while (> theNumber 0)
(set! theNumber (- theNumber 1))
(set! theStain (car (gimp-layer-new theImage theSize theSize
RGBA-IMAGE _"Stain" 100
(if (= inDark TRUE)
LAYER-MODE-DARKEN-ONLY LAYER-MODE-NORMAL))))
(gimp-image-insert-layer theImage theStain 0 0)
(gimp-selection-all theImage)
(gimp-drawable-edit-clear theStain)
(let ((blobSize (/ (rand (- theSize 40)) (+ (rand 3) 1))))
(gimp-image-select-ellipse theImage
CHANNEL-OP-REPLACE
(/ (- theSize blobSize) 2)
(/ (- theSize blobSize) 2)
blobSize blobSize)
)
(script-fu-distress-selection theImage theStain
(- (* (+ (rand 15) 1) (+ (rand 15) 1)) 1)
(/ theSize 25) 4 2 TRUE TRUE)
(gimp-context-set-gradient "Coffee")
(gimp-drawable-edit-gradient-fill theStain
GRADIENT-SHAPEBURST-DIMPLED 0
FALSE 0 0
TRUE
0 0 0 0)
(gimp-layer-set-offsets theStain
(- (rand theWidth) (/ theSize 2))
(- (rand theHeight) (/ theSize 2)))
)
(gimp-selection-none theImage)
(gimp-image-undo-group-end theImage)
(gimp-displays-flush)
(gimp-context-pop)
)
)
; Register the function with GIMP:
(script-fu-register "script-fu-coffee-stain"
_"_Coffee Stain..."
_"Add realistic looking coffee stains to the image"
"Chris Gutteridge"
"1998, Chris Gutteridge / ECS dept, University of Southampton, England."
"25th April 1998"
"RGB*"
SF-IMAGE "The image" 0
SF-DRAWABLE "The layer" 0
SF-ADJUSTMENT _"Stains" '(3 1 10 1 1 0 0)
SF-TOGGLE _"Darken only" TRUE
)
(script-fu-menu-register "script-fu-coffee-stain" "<Image>/Filters/Decor")
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