123 lines
4.2 KiB
Scheme
123 lines
4.2 KiB
Scheme
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;
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; distress selection
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;
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;
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; Chris Gutteridge (cjg@ecs.soton.ac.uk)
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; At ECS Dept, University of Southampton, England.
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; This program is free software: you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 3 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <https://www.gnu.org/licenses/>.
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; Define the function:
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(define (script-fu-distress-selection inImage
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inDrawable
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inThreshold
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inSpread
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inGranu
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inSmooth
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inSmoothH
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inSmoothV)
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(let (
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(theImage inImage)
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(theWidth (car (pika-image-get-width inImage)))
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(theHeight (car (pika-image-get-height inImage)))
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(theLayer 0)
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(theMode (car (pika-image-get-base-type inImage)))
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(prevLayers (pika-image-get-selected-layers inImage))
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)
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(pika-context-push)
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(pika-context-set-defaults)
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(pika-image-undo-group-start theImage)
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(if (= theMode GRAY)
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(set! theMode GRAYA-IMAGE)
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(set! theMode RGBA-IMAGE)
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)
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(set! theLayer (car (pika-layer-new theImage
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theWidth
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theHeight
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theMode
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"Distress Scratch Layer"
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100
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LAYER-MODE-NORMAL)))
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(pika-image-insert-layer theImage theLayer 0 0)
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(if (= FALSE (car (pika-selection-is-empty theImage)))
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(pika-drawable-edit-fill theLayer FILL-BACKGROUND)
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)
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(pika-selection-invert theImage)
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(if (= FALSE (car (pika-selection-is-empty theImage)))
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(pika-drawable-edit-clear theLayer)
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)
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(pika-selection-invert theImage)
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(pika-selection-none inImage)
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(pika-layer-scale theLayer
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(/ theWidth inGranu)
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(/ theHeight inGranu)
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TRUE)
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(plug-in-spread RUN-NONINTERACTIVE
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theImage
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theLayer
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inSpread
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inSpread)
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(plug-in-gauss-iir RUN-NONINTERACTIVE
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theImage theLayer inSmooth inSmoothH inSmoothV)
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(pika-layer-scale theLayer theWidth theHeight TRUE)
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(plug-in-threshold-alpha RUN-NONINTERACTIVE theImage theLayer inThreshold)
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(plug-in-gauss-iir RUN-NONINTERACTIVE theImage theLayer 1 TRUE TRUE)
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(pika-image-select-item inImage CHANNEL-OP-REPLACE theLayer)
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(pika-image-remove-layer theImage theLayer)
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(if (and (= (car (pika-item-id-is-channel inDrawable)) TRUE)
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(= (car (pika-item-id-is-layer-mask inDrawable)) FALSE))
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(pika-image-set-selected-channels theImage 1 (make-vector 1 inDrawable))
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)
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(pika-image-undo-group-end theImage)
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(pika-image-set-selected-layers theImage (car prevLayers) (cadr prevLayers))
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(pika-displays-flush)
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(pika-context-pop)
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)
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)
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(script-fu-register "script-fu-distress-selection"
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_"_Distort..."
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_"Distress the selection"
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"Chris Gutteridge"
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"1998, Chris Gutteridge / ECS dept, University of Southampton, England."
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"23rd April 1998"
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"RGB*,GRAY*"
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SF-IMAGE "The image" 0
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SF-DRAWABLE "The layer" 0
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SF-ADJUSTMENT _"_Threshold (bigger 1<-->254 smaller)" '(127 1 254 1 10 0 0)
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SF-ADJUSTMENT _"_Spread" '(8 0 1000 1 10 0 1)
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SF-ADJUSTMENT _"_Granularity (1 is low)" '(4 1 25 1 10 0 1)
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SF-ADJUSTMENT _"S_mooth" '(2 1 150 1 10 0 1)
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SF-TOGGLE _"Smooth hor_izontally" TRUE
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SF-TOGGLE _"Smooth _vertically" TRUE
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)
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(script-fu-menu-register "script-fu-distress-selection"
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"<Image>/Select/[Modify]")
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