1; GIMP - The GNU Image Manipulation Program
2; Copyright (C) 1995 Spencer Kimball and Peter Mattis
3;
4; Lava effect
5; Copyright (c) 1997 Adrian Likins
6; aklikins@eos.ncsu.edu
7;
8; based on a idea by Sven Riedel <lynx@heim8.tu-clausthal.de>
9; tweaked a bit by Sven Neumann <neumanns@uni-duesseldorf.de>
10;
11; This program is free software: you can redistribute it and/or modify
12; it under the terms of the GNU General Public License as published by
13; the Free Software Foundation; either version 3 of the License, or
14; (at your option) any later version.
15;
16; This program is distributed in the hope that it will be useful,
17; but WITHOUT ANY WARRANTY; without even the implied warranty of
18; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19; GNU General Public License for more details.
20;
21; You should have received a copy of the GNU General Public License
22; along with this program.  If not, see <https://www.gnu.org/licenses/>.
23
24
25(define (script-fu-lava image
26                        drawable
27                        seed
28                        tile_size
29                        mask_size
30                        gradient
31                        keep-selection
32                        separate-layer
33                        current-grad)
34  (let* (
35        (type (car (gimp-drawable-type-with-alpha drawable)))
36        (image-width (car (gimp-image-width image)))
37        (image-height (car (gimp-image-height image)))
38        (active-selection 0)
39        (selection-bounds 0)
40        (select-offset-x 0)
41        (select-offset-y 0)
42        (select-width 0)
43        (select-height 0)
44        (lava-layer 0)
45        (active-layer 0)
46        )
47
48    (gimp-context-push)
49    (gimp-context-set-defaults)
50    (gimp-image-undo-group-start image)
51
52    (if (= (car (gimp-drawable-has-alpha drawable)) FALSE)
53        (gimp-layer-add-alpha drawable)
54    )
55
56    (if (= (car (gimp-selection-is-empty image)) TRUE)
57        (gimp-image-select-item image CHANNEL-OP-REPLACE drawable)
58    )
59
60    (set! active-selection (car (gimp-selection-save image)))
61    (gimp-image-set-active-layer image drawable)
62
63    (set! selection-bounds (gimp-selection-bounds image))
64    (set! select-offset-x (cadr selection-bounds))
65    (set! select-offset-y (caddr selection-bounds))
66    (set! select-width (- (cadr (cddr selection-bounds)) select-offset-x))
67    (set! select-height (- (caddr (cddr selection-bounds)) select-offset-y))
68
69    (if (= separate-layer TRUE)
70        (begin
71          (set! lava-layer (car (gimp-layer-new image
72                                                select-width
73                                                select-height
74                                                type
75                                                "Lava Layer"
76                                                100
77                                                LAYER-MODE-NORMAL-LEGACY)))
78
79          (gimp-image-insert-layer image lava-layer 0 -1)
80          (gimp-layer-set-offsets lava-layer select-offset-x select-offset-y)
81          (gimp-selection-none image)
82          (gimp-drawable-edit-clear lava-layer)
83
84          (gimp-image-select-item image CHANNEL-OP-REPLACE drawable)
85          (gimp-image-set-active-layer image lava-layer)
86        )
87    )
88
89    (set! active-layer (car (gimp-image-get-active-layer image)))
90
91    (if (= current-grad FALSE)
92        (gimp-context-set-gradient gradient)
93    )
94
95    (plug-in-solid-noise RUN-NONINTERACTIVE image active-layer FALSE TRUE seed 2 2 2)
96    (plug-in-cubism RUN-NONINTERACTIVE image active-layer tile_size 2.5 0)
97    (plug-in-oilify RUN-NONINTERACTIVE image active-layer mask_size 0)
98    (plug-in-edge RUN-NONINTERACTIVE image active-layer 2 0 0)
99    (plug-in-gauss-rle RUN-NONINTERACTIVE image active-layer 2 TRUE TRUE)
100    (plug-in-gradmap RUN-NONINTERACTIVE image active-layer)
101
102    (if (= keep-selection FALSE)
103        (gimp-selection-none image)
104    )
105
106    (gimp-image-set-active-layer image drawable)
107    (gimp-image-remove-channel image active-selection)
108
109    (gimp-image-undo-group-end image)
110    (gimp-context-pop)
111
112    (gimp-displays-flush)
113  )
114)
115
116(script-fu-register "script-fu-lava"
117  _"_Lava..."
118  _"Fill the current selection with lava"
119  "Adrian Likins <adrian@gimp.org>"
120  "Adrian Likins"
121  "10/12/97"
122  "RGB* GRAY*"
123  SF-IMAGE       "Image"          0
124  SF-DRAWABLE    "Drawable"       0
125  SF-ADJUSTMENT _"Seed"           '(10 1 30000 1 10 0 1)
126  SF-ADJUSTMENT _"Size"           '(10 0 100 1 10 0 1)
127  SF-ADJUSTMENT _"Roughness"      '(7 3 50 1 10 0 0)
128  SF-GRADIENT   _"Gradient"       "German flag smooth"
129  SF-TOGGLE     _"Keep selection" TRUE
130  SF-TOGGLE     _"Separate layer" TRUE
131  SF-TOGGLE     _"Use current gradient" FALSE
132)
133
134(script-fu-menu-register "script-fu-lava"
135                         "<Image>/Filters/Render")
136