06-23-2018, 06:39 PM
This script is under Selection -> Distort.
Im interested in the steps.
As far as i can tell, it does the following:
- Spread
- Blur
- Levels (alpha)
But the code says Threshold instead of Levels, which is odd, because Threshold doesnt have an alpha option.
Im interested in the steps.
As far as i can tell, it does the following:
- Spread
- Blur
- Levels (alpha)
But the code says Threshold instead of Levels, which is odd, because Threshold doesnt have an alpha option.
Code:
;
; distress selection
;
;
; 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 <http://www.gnu.org/licenses/>.
; Define the function:
(define (script-fu-distress-selection inImage
inDrawable
inThreshold
inSpread
inGranu
inSmooth
inSmoothH
inSmoothV)
(let (
(theImage inImage)
(theWidth (car (gimp-image-width inImage)))
(theHeight (car (gimp-image-height inImage)))
(theLayer 0)
(theMode (car (gimp-image-base-type inImage)))
(prevLayer (car (gimp-image-get-active-layer inImage)))
)
(gimp-context-push)
(gimp-context-set-defaults)
(gimp-image-undo-group-start theImage)
(if (= theMode GRAY)
(set! theMode GRAYA-IMAGE)
(set! theMode RGBA-IMAGE)
)
(set! theLayer (car (gimp-layer-new theImage
theWidth
theHeight
theMode
"Distress Scratch Layer"
100
NORMAL-MODE)))
(gimp-image-insert-layer theImage theLayer 0 0)
(if (= FALSE (car (gimp-selection-is-empty theImage)))
(gimp-edit-fill theLayer BACKGROUND-FILL)
)
(gimp-selection-invert theImage)
(if (= FALSE (car (gimp-selection-is-empty theImage)))
(gimp-edit-clear theLayer)
)
(gimp-selection-invert theImage)
(gimp-selection-none inImage)
(gimp-layer-scale theLayer
(/ theWidth inGranu)
(/ theHeight inGranu)
TRUE)
(plug-in-spread RUN-NONINTERACTIVE
theImage
theLayer
inSpread
inSpread)
(plug-in-gauss-iir RUN-NONINTERACTIVE
theImage theLayer inSmooth inSmoothH inSmoothV)
(gimp-layer-scale theLayer theWidth theHeight TRUE)
(plug-in-threshold-alpha RUN-NONINTERACTIVE theImage theLayer inThreshold)
(plug-in-gauss-iir RUN-NONINTERACTIVE theImage theLayer 1 TRUE TRUE)
(gimp-image-select-item inImage CHANNEL-OP-REPLACE theLayer)
(gimp-image-remove-layer theImage theLayer)
(if (and (= (car (gimp-item-is-channel inDrawable)) TRUE)
(= (car (gimp-item-is-layer-mask inDrawable)) FALSE))
(gimp-image-set-active-channel theImage inDrawable)
)
(gimp-image-undo-group-end theImage)
(gimp-image-set-active-layer theImage prevLayer)
(gimp-displays-flush)
(gimp-context-pop)
)
)
(script-fu-register "script-fu-distress-selection"
_"_Distort..."
_"Distress the selection"
"Chris Gutteridge"
"1998, Chris Gutteridge / ECS dept, University of Southampton, England."
"23rd April 1998"
"RGB*,GRAY*"
SF-IMAGE "The image" 0
SF-DRAWABLE "The layer" 0
SF-ADJUSTMENT _"Threshold (bigger 1<-->254 smaller)" '(127 1 254 1 10 0 0)
SF-ADJUSTMENT _"Spread" '(8 0 1000 1 10 0 1)
SF-ADJUSTMENT _"Granularity (1 is low)" '(4 1 25 1 10 0 1)
SF-ADJUSTMENT _"Smooth" '(2 1 150 1 10 0 1)
SF-TOGGLE _"Smooth horizontally" TRUE
SF-TOGGLE _"Smooth vertically" TRUE
)
(script-fu-menu-register "script-fu-distress-selection"
"<Image>/Select/Modify")
