150 lines
6.5 KiB
Scheme
150 lines
6.5 KiB
Scheme
; GIMP - The GNU Image Manipulation Program
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; Copyright (C) 1995 Spencer Kimball and Peter Mattis
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;
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; Lava effect
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; Copyright (c) 1997 Adrian Likins
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; aklikins@eos.ncsu.edu
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;
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; based on a idea by Sven Riedel <lynx@heim8.tu-clausthal.de>
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; tweaked a bit by Sven Neumann <neumanns@uni-duesseldorf.de>
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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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(define (script-fu-lava image
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drawables
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seed
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tile_size
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mask_size
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gradient
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keep-selection
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separate-layer
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current-grad)
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(let* (
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(first-layer (vector-ref drawables 0))
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(type (car (gimp-drawable-type-with-alpha first-layer)))
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(image-width (car (gimp-image-get-width image)))
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(image-height (car (gimp-image-get-height image)))
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(active-selection 0)
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(selection-bounds 0)
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(select-offset-x 0)
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(select-offset-y 0)
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(select-width 0)
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(select-height 0)
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(lava-layer 0)
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(active-layer 0)
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(selected-layers-array (car (gimp-image-get-selected-layers image)))
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(num-selected-layers (vector-length selected-layers-array))
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)
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(if (= num-selected-layers 1)
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(begin
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(gimp-context-push)
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(gimp-context-set-defaults)
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(gimp-image-undo-group-start image)
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(if (= (car (gimp-drawable-has-alpha first-layer)) FALSE)
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(gimp-layer-add-alpha first-layer)
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)
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(if (= (car (gimp-selection-is-empty image)) TRUE)
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(gimp-image-select-item image CHANNEL-OP-REPLACE first-layer)
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)
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(set! active-selection (car (gimp-selection-save image)))
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(gimp-image-set-selected-layers image (make-vector 1 first-layer))
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(set! selection-bounds (gimp-selection-bounds image))
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(set! select-offset-x (cadr selection-bounds))
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(set! select-offset-y (caddr selection-bounds))
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(set! select-width (- (cadr (cddr selection-bounds)) select-offset-x))
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(set! select-height (- (caddr (cddr selection-bounds)) select-offset-y))
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(if (= separate-layer TRUE)
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(begin
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(set! lava-layer (car (gimp-layer-new image
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"Lava Layer"
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select-width
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select-height
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type
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100
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LAYER-MODE-NORMAL-LEGACY)))
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(gimp-image-insert-layer image lava-layer 0 -1)
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(gimp-layer-set-offsets lava-layer select-offset-x select-offset-y)
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(gimp-selection-none image)
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(gimp-drawable-edit-clear lava-layer)
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(gimp-image-select-item image CHANNEL-OP-REPLACE active-selection)
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(gimp-image-set-selected-layers image (make-vector 1 lava-layer))
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)
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)
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(set! selected-layers-array (car (gimp-image-get-selected-layers image)))
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(set! num-selected-layers (vector-length selected-layers-array))
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(set! active-layer (vector-ref selected-layers-array (- num-selected-layers 1)))
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(if (= current-grad FALSE)
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(gimp-context-set-gradient gradient)
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)
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(let* ((width (cadddr (gimp-drawable-mask-intersect active-layer)))
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(height (caddr (cddr (gimp-drawable-mask-intersect active-layer)))))
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(gimp-drawable-merge-new-filter active-layer "gegl:noise-solid" 0 LAYER-MODE-REPLACE 1.0 "tileable" FALSE "turbulent" TRUE "seed" seed
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"detail" 2 "x-size" 2.0 "y-size" 2.0
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"width" width "height" height)
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)
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(gimp-drawable-merge-new-filter active-layer "gegl:cubism" 0 LAYER-MODE-REPLACE 1.0 "tile-size" tile_size "tile-saturation" 2.5 "bg-color" '(0 0 0))
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(gimp-drawable-merge-new-filter active-layer "gegl:oilify" 0 LAYER-MODE-REPLACE 1.0 "mask-radius" (max 1 (/ mask_size 2)) "use-inten" FALSE)
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(gimp-drawable-merge-new-filter active-layer "gegl:edge" 0 LAYER-MODE-REPLACE 1.0 "amount" 2.0 "border-behavior" "none" "algorithm" "sobel")
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(gimp-drawable-merge-new-filter active-layer "gegl:gaussian-blur" 0 LAYER-MODE-REPLACE 1.0 "std-dev-x" 0.64 "std-dev-y" 0.64 "filter" "auto")
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(plug-in-gradmap #:run-mode RUN-NONINTERACTIVE #:image image #:drawables selected-layers-array)
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(if (= keep-selection FALSE)
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(gimp-selection-none image)
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)
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(gimp-image-set-selected-layers image (make-vector 1 first-layer))
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(gimp-image-remove-channel image active-selection)
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(gimp-image-undo-group-end image)
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(gimp-context-pop)
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(gimp-displays-flush)
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)
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; else
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(gimp-message _"Lava works with exactly one selected layer")
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)
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)
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)
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(script-fu-register-filter "script-fu-lava"
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_"_Lava..."
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_"Fill the current selection with lava"
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"Adrian Likins <adrian@gimp.org>"
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"Adrian Likins"
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"10/12/97"
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"RGB* GRAY*"
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SF-ONE-OR-MORE-DRAWABLE
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SF-ADJUSTMENT _"Seed" '(10 1 30000 1 10 0 1)
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SF-ADJUSTMENT _"Size" '(10 0 100 1 10 0 1)
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SF-ADJUSTMENT _"Roughness" '(7 3 50 1 10 0 0)
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SF-GRADIENT _"Gradient" "Incandescent"
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SF-TOGGLE _"Keep selection" TRUE
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SF-TOGGLE _"Separate layer" TRUE
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SF-TOGGLE _"Use current gradient" FALSE
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)
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(script-fu-menu-register "script-fu-lava"
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"<Image>/Filters/Render")
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