98 lines
4.4 KiB
Scheme
98 lines
4.4 KiB
Scheme
; Plugin for the GNU Image Manipulation Program
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; Copyright (C) 2006 Martin Nordholts
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;
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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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;
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; Renders Difference Clouds onto a layer, i.e. solid noise merged down with the
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; Difference Mode
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;
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(define (script-fu-difference-clouds image
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drawables
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seed
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detail
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tileable
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turbulent
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x_size
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y_size)
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(let* ((layer (vector-ref drawables 0))
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(draw-offset-x (car (gimp-drawable-get-offsets layer)))
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(draw-offset-y (cadr (gimp-drawable-get-offsets layer)))
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(has-sel (car (gimp-drawable-mask-intersect layer)))
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(sel-offset-x (cadr (gimp-drawable-mask-intersect layer)))
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(sel-offset-y (caddr (gimp-drawable-mask-intersect layer)))
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(width (cadddr (gimp-drawable-mask-intersect layer)))
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(height (caddr (cddr (gimp-drawable-mask-intersect layer))))
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(type (car (gimp-drawable-type-with-alpha layer)))
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(diff-clouds -1)
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(offset-x 0)
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(offset-y 0)
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)
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(gimp-image-undo-group-start image)
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; Create the cloud layer
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(set! diff-clouds (car (gimp-layer-new image "Clouds" width height type
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100 LAYER-MODE-DIFFERENCE)))
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; Add the cloud layer above the current layer
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(gimp-image-insert-layer image diff-clouds 0 -1)
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; Clear the layer (so there are no noise in it)
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(gimp-drawable-fill diff-clouds FILL-TRANSPARENT)
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; Selections are relative to the drawable; adjust the final offset
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(set! offset-x (+ draw-offset-x sel-offset-x))
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(set! offset-y (+ draw-offset-y sel-offset-y))
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; Offset the clouds layer
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(if (gimp-item-id-is-layer layer)
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(gimp-item-transform-translate diff-clouds offset-x offset-y))
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; Run GEGL Solid Noise filter
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(let* ((cloud-width (cadddr (gimp-drawable-mask-intersect diff-clouds)))
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(cloud-height (caddr (cddr (gimp-drawable-mask-intersect diff-clouds)))))
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(gimp-drawable-merge-new-filter diff-clouds "gegl:noise-solid" 0 LAYER-MODE-REPLACE 1.0 "tileable" tileable "turbulent" turbulent "seed" seed
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"detail" detail "x-size" x_size "y-size" y_size
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"width" cloud-width "height" cloud-height)
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)
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; Merge the clouds layer with the layer below
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(gimp-image-merge-down image diff-clouds EXPAND-AS-NECESSARY)
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(gimp-image-undo-group-end image)
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(gimp-displays-flush)
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)
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)
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(script-fu-register-filter "script-fu-difference-clouds"
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_"_Difference Clouds"
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_"Solid noise applied with Difference layer mode"
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"Martin Nordholts <enselic@hotmail.com>"
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"Martin Nordholts"
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"2006/10/25"
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"RGB* GRAY*"
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SF-ONE-OR-MORE-DRAWABLE
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SF-ADJUSTMENT _"Random Seed" '(0 0 1024 1 10 0 1)
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SF-ADJUSTMENT _"Levels" '(1 0 15 1 10 0 1)
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SF-TOGGLE _"Tileable" FALSE
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SF-TOGGLE _"Turbulent" FALSE
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SF-ADJUSTMENT _"X" '(4 0.1 16 0.1 1 1 0)
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SF-ADJUSTMENT _"Y" '(4 0.1 16 0.1 1 1 0)
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)
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(script-fu-menu-register "script-fu-difference-clouds"
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"<Image>/Filters/Render/Noise")
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