104 lines
3.3 KiB
Scheme
104 lines
3.3 KiB
Scheme
; 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 (script-fu-coffee-stain inImage inLayer inNumber inDark)
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(let* (
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(theImage inImage)
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(theHeight (car (pika-image-get-height theImage)))
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(theWidth (car (pika-image-get-width theImage)))
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(theNumber inNumber)
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(theSize (min theWidth theHeight))
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(theStain 0)
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(theSpread 0)
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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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(while (> theNumber 0)
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(set! theNumber (- theNumber 1))
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(set! theStain (car (pika-layer-new theImage theSize theSize
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RGBA-IMAGE _"Stain" 100
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(if (= inDark TRUE)
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LAYER-MODE-DARKEN-ONLY LAYER-MODE-NORMAL))))
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(pika-image-insert-layer theImage theStain 0 0)
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(pika-selection-all theImage)
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(pika-drawable-edit-clear theStain)
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(let ((blobSize (/ (rand (- theSize 40)) (+ (rand 3) 1))))
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(if (< blobSize 32) (set! blobSize 32))
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(pika-image-select-ellipse theImage
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CHANNEL-OP-REPLACE
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(/ (- theSize blobSize) 2)
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(/ (- theSize blobSize) 2)
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blobSize blobSize)
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)
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; clamp the spread value to the 'plug-in-spread' limits
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(set! theSpread (/ theSize 25))
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(if (> theSpread 200) (set! theSpread 200))
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(script-fu-distress-selection theImage theStain
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(- (* (+ (rand 15) 1) (+ (rand 15) 1)) 1)
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theSpread 4 2 TRUE TRUE)
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(pika-context-set-gradient "Coffee")
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; only fill if there is a selection
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(if (> (car (pika-selection-bounds theImage)) 0)
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(pika-drawable-edit-gradient-fill theStain
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GRADIENT-SHAPEBURST-DIMPLED 0
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FALSE 0 0
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TRUE
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0 0 0 0)
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)
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(pika-layer-set-offsets theStain
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(- (rand theWidth) (/ theSize 2))
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(- (rand theHeight) (/ theSize 2)))
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)
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(pika-selection-none theImage)
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(pika-image-undo-group-end theImage)
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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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; Register the function with PIKA:
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(script-fu-register "script-fu-coffee-stain"
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_"_Coffee Stain..."
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_"Add realistic looking coffee stains to the image"
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"Chris Gutteridge"
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"1998, Chris Gutteridge / ECS dept, University of Southampton, England."
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"25th April 1998"
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"RGB*"
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SF-IMAGE "The image" 0
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SF-DRAWABLE "The layer" 0
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SF-ADJUSTMENT _"Stains" '(3 1 10 1 2 0 0)
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SF-TOGGLE _"Darken only" TRUE
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)
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(script-fu-menu-register "script-fu-coffee-stain" "<Image>/Filters/Decor")
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